[Event "Barcelona Sant Marti op-B 24th"]
[Site "Barcelona"]
[Date "2024.07.21"]
[Round "9"]
[White "Shaffer, Alexander"]
[Black "Walter Travella, German"]
[Result "1-0"]
[ECO "B40"]
[WhiteElo "1724"]
[BlackElo "1871"]
[PlyCount "47"]
[EventDate "2024.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. Nc3 Bb4 7. 0-0 Nc6 8. Nxc6 dxc6 9. e5 Nd7 10. Qg4 Bxc3 11. bxc3 Kf8 12. Bg5 Qa5 13. f4 h6 14. Bh4 Qxc3 15. Rad1 h5 16. Qg5 f6 17. exf6 Qxf6 18. Qg3 Qc3 19. Rfe1 Nf6 20. f5 Qc5+ 21. Kh1 exf5 22. Bxf6 gxf6 23. Qg6 Qc3 24. Re8# 1-0

[Event "Barcelona Sant Marti op-B 24th"]
[Site "Barcelona"]
[Date "2024.07.20"]
[Round "8"]
[White "Comas Molne, Pau"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "E11"]
[WhiteElo "1856"]
[BlackElo "1724"]
[PlyCount "59"]
[EventDate "2024.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 0-0 7. 0-0 c6 8. Bc3 Ne4 9. Nbd2 f5 10. Nxe4 fxe4 11. Ne5 Nd7 12. f4 Nxe5 13. fxe5 Bd7 14. e3 Rxf1+ 15. Bxf1 Bg5 16. Bd2 Qe8 17. Qb3 b6 18. Bg2 Qh5 19. Rf1 Rf8 20. Rxf8+ Kxf8 21. Kf2 Kg8 22. Qa4 Qf7+ 23. Ke1 Be8 24. Qa6 Qd7 25. h4 Be7 26. a3 Bh5 27. Bh3 Bf3 28. Bb4 h5 29. Bxe7 Qxe7 30. Qc8+ 1-0

[Event "Barcelona Sant Marti op-B 24th"]
[Site "Barcelona"]
[Date "2024.07.19"]
[Round "7"]
[White "Shaffer, Alexander"]
[Black "Corominas Garrido, Jordi"]
[Result "1-0"]
[ECO "C14"]
[WhiteElo "1724"]
[BlackElo "1830"]
[PlyCount "65"]
[EventDate "2024.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 0-0 8. Nf3 a6 9. Qd2 c5 10. dxc5 Nxc5 11. 0-0-0 b5 12. Bd3 Nc6 13. h4 Nb4 14. Kb1 Bb7 15. h5 Nbxd3 16. cxd3 b4 17. Ne2 a5 18. h6 g6 19. g4 Ba6 20. Qe3 Rfc8 21. f5 b3 22. a3 Rc6 23. Nf4 Rac8 24. Rc1 exf5 25. gxf5 Qd7 26. e6 fxe6 27. fxg6 R6c7 28. Ne5 Qe8 29. Nh5 Nd7 30. Rxc7 Rxc7 31. Nxd7 Qxg6 32. Rg1 Bxd3+ 33. Ka1 1-0

[Event "Barcelona Sant Marti op-B 24th"]
[Site "Barcelona"]
[Date "2024.07.18"]
[Round "6"]
[White "Sastre Colil, Jordi"]
[Black "Shaffer, Alexander"]
[Result "0-1"]
[ECO "B56"]
[WhiteElo "1641"]
[BlackElo "1724"]
[PlyCount "54"]
[EventDate "2024.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be3 e5 7. Nb3 Be7 8. h3 Be6 9. Bd3 0-0 10. 0-0 d5 11. exd5 Nxd5 12. Nxd5 Bxd5 13. c4 Be6 14. Qe2 f5 15. Rad1 Qe8 16. Bc5 e4 17. Bb1 Ne5 18. Rc1 Rc8 19. Bxe7 Qxe7 20. c5 Bxb3 21. axb3 Rxc5 22. Qe3 Rfc8 23. Rxc5 Qxc5 24. Rc1 Qxc1+ 25. Kh2 Qxe3 26. fxe3 Rc1 27. Ba2 Ra1 0-1

[Event "Barcelona Sant Marti op-B 24th"]
[Site "Barcelona"]
[Date "2024.07.17"]
[Round "5"]
[White "Shaffer, Alexander"]
[Black "Sole Bove, Josep Maria"]
[Result "0-1"]
[ECO "B45"]
[WhiteElo "1724"]
[BlackElo "1836"]
[PlyCount "32"]
[EventDate "2024.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 d4 11. Ne4 0-0 12. Bg5 Qa5+ 13. Bd2 Qe5 14. f4 Qe7 15. Qf3 Nxe4 16. Bxe4 f5 0-1

[Event "Barcelona Sant Marti op-B 24th"]
[Site "Barcelona"]
[Date "2024.07.16"]
[Round "4"]
[White "Sanchez Hernandez, Xavier"]
[Black "Shaffer, Alexander"]
[Result "0-1"]
[ECO "B56"]
[WhiteElo "1598"]
[BlackElo "1724"]
[PlyCount "44"]
[EventDate "2024.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be3 e5 7. Nb3 Be7 8. f3 0-0 9. Qd2 Be6 10. 0-0-0 a5 11. Na4 d5 12. Nb6 a4 13. Na1 d4 14. Nxa8 Qxa8 15. Bg5 Bxa2 16. h4 a3 17. b3 Bb4 18. c3 Bxb3 19. Nxb3 Bxc3 20. Qf2 a2 21. Na1 Qa3+ 22. Kc2 Nb4# 0-1

[Event "Barcelona Sant Marti op-B 24th"]
[Site "Barcelona"]
[Date "2024.07.15"]
[Round "3"]
[White "Shaffer, Alexander"]
[Black "Morais Carreras, Javier"]
[Result "0-1"]
[ECO "C42"]
[WhiteElo "1724"]
[BlackElo "1937"]
[PlyCount "38"]
[EventDate "2024.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. 0-0 Nc6 8. c4 Nb4 9. cxd5 Nxd3 10. Qxd3 Qxd5 11. Re1 Bf5 12. Nc3 Nxc3 13. Qxc3 Be6 14. Re5 Qd7 15. d5 Bxd5 16. Bg5 f6 17. Rxe7+ Kxe7 18. Rd1 c6 19. Nh4 Kf7 0-1

[Event "Barcelona Sant Marti op-B 24th"]
[Site "Barcelona"]
[Date "2024.07.14"]
[Round "2"]
[White "Delgado Camara, Lluis Felix"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "C30"]
[WhiteElo "1813"]
[BlackElo "1724"]
[PlyCount "95"]
[EventDate "2024.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 e5 2. f4 Bc5 3. Qh5 Qe7 4. Qxe5 Qxe5 5. fxe5 Bxg1 6. Rxg1 Nc6 7. c3 Nxe5 8. d4 Ng6 9. Be3 Nf6 10. Bd3 d5 11. e5 Ng4 12. Bxg6 hxg6 13. Bf4 Be6 14. h3 Nh6 15. Nd2 0-0-0 16. Nf3 Nf5 17. Kf2 Rde8 18. Rae1 Kd7 19. b4 c6 20. Nd2 b6 21. Nb3 f6 22. a4 g5 23. Bh2 g4 24. a5 gxh3 25. g4 Nh4 26. Ra1 Ra8 27. Kg3 Ng2 28. exf6 gxf6 29. Rgf1 Rag8 30. axb6 Rxg4+ 31. Kf2 axb6 32. Ra7+ Kd8 33. Bc7+ Ke7 34. Bxb6+ Bd7 35. Nc5 Rf4+ 36. Ke2 Re8 37. Rxf4 Nxf4+ 38. Kf3 Rg8 39. Rxd7+ Ke8 40. Rd8+ Kf7 41. Rxg8 Kxg8 42. Kg3 Ne2+ 43. Kxh3 Nxc3 44. Kg4 Kf7 45. Nb7 Ke6 46. Bc5 Ne2 47. Na5 f5+ 48. Kf3 1-0

[Event "Barcelona Sant Marti op-B 24th"]
[Site "Barcelona"]
[Date "2024.07.13"]
[Round "1"]
[White "Shaffer, Alexander"]
[Black "Franzoni Ladron, De Guevara Enric"]
[Result "1-0"]
[ECO "B18"]
[WhiteElo "1724"]
[BlackElo "1926"]
[PlyCount "83"]
[EventDate "2024.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. Bd3 Bxd3 8. Qxd3 Ngf6 9. 0-0 e6 10. Re1 Be7 11. b3 0-0 12. Bb2 Qc7 13. c4 Rad8 14. Rad1 Rfe8 15. Ne4 Nxe4 16. Qxe4 Nf6 17. Qc2 a6 18. a3 c5 19. dxc5 Qxc5 20. b4 Qh5 21. h3 Nd7 22. Qe4 Nb6 23. Rxd8 Bxd8 24. Qxb7 Nxc4 25. Qxa6 Nxb2 26. Qc6 Kf8 27. Qc2 Bf6 28. Rb1 Qd5 29. Rxb2 Bxb2 30. Qxb2 e5 31. b5 f6 32. Qb4+ Kf7 33. a4 Rb8 34. Nd2 f5 35. Nc4 Ke6 36. b6 f4 37. a5 Qd1+ 38. Kh2 Qd4 39. a6 f3 40. b7 Qf4+ 41. g3 Qd4 42. Qb6+ 1-0

[Event "Bangkok Big Rook op 4th"]
[Site "Bangkok"]
[Date "2024.05.01"]
[Round "1"]
[White "Le Ruyet, Leopold"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "D07"]
[WhiteElo "2233"]
[BlackElo "1747"]
[PlyCount "109"]
[EventDate "2024.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "THA"]
[SourceTitle "CBM 220 Extra"]
[Source "ChessBase"]
[SourceDate "2024.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.07.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nc6 3. Nf3 Bg4 4. cxd5 Bxf3 5. dxc6 Bxc6 6. Nc3 e6 7. e4 Bb4 8. f3 Qh4+ 9. g3 Qf6 10. Be3 0-0-0 11. Qe2 Ne7 12. 0-0-0 Ba5 13. Qf2 Bb6 14. h4 h6 15. h5 Kb8 16. f4 Nf5 17. e5 Qe7 18. Rh2 Rd7 19. g4 Nxe3 20. Qxe3 Rhd8 21. Rhd2 Qb4 22. a3 Qb3 23. Kb1 Bd5 24. Bb5 c6 25. Ba4 Qc4 26. Nxd5 Qxa4 27. Nxb6 axb6 28. Qc3 Qb5 29. Qc2 Qd5 30. Rf1 c5 31. Qh7 g6 32. hxg6 Qe4+ 33. Ka1 fxg6 34. Qxh6 Rxd4 35. Rxd4 cxd4 36. Qh4 Rc8 37. Qe7 Rc6 38. Rd1 Qxf4 39. Qd8+ Ka7 40. Rxd4 Qf1+ 41. Ka2 Qb5 42. Rb4 Qd5+ 43. Qxd5 exd5 44. Rd4 Re6 45. Rxd5 Kb8 46. Kb3 Kc7 47. Kb4 g5 48. Kc4 Kc6 49. b4 Rh6 50. Rd4 b5+ 51. Kd3 Rh3+ 52. Ke4 Rxa3 53. Kf5 Rc3 54. e6 Re3 55. Kf6 1-0

[Event "Sitges Sunway op 10th"]
[Site "Sitges"]
[Date "2023.12.20"]
[Round "8"]
[White "Shaffer, Alexander"]
[Black "Serrahima Susany, Ramon"]
[Result "0-1"]
[ECO "D63"]
[WhiteElo "1620"]
[BlackElo "2023"]
[PlyCount "80"]
[EventDate "2023.12.12"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "ESP"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 a6 6. cxd5 exd5 7. Nf3 0-0 8. Qb3 c6 9. Bd3 Nbd7 10. 0-0 Re8 11. Rac1 h6 12. Bf4 Nh5 13. Nxd5 Nxf4 14. Nxf4 Bd6 15. Ne2 Nb6 16. Ng3 Be6 17. Qc2 Nd5 18. a3 Bg4 19. Nd2 Qh4 20. Nc4 Bc7 21. Bh7+ Kh8 22. Bf5 Bh5 23. Rfe1 Rad8 24. f4 g6 25. Nxh5 Qxh5 26. Bd3 Nxf4 27. exf4 Bxf4 28. g3 Bxc1 29. Qxc1 Rxe1+ 30. Qxe1 Qd5 31. Qe5+ Qxe5 32. Nxe5 Rxd4 33. Bf1 Kg7 34. b3 Rd1 35. Nc4 b5 36. Na5 c5 37. a4 c4 38. axb5 c3 39. b4 c2 40. Nb3 axb5 0-1

[Event "Sitges Sunway op 10th"]
[Site "Sitges"]
[Date "2023.12.14"]
[Round "3"]
[White "Shaffer, Alexander"]
[Black "Hristodorescu, Daniel"]
[Result "1/2-1/2"]
[ECO "A65"]
[WhiteElo "1620"]
[BlackElo "2111"]
[PlyCount "118"]
[EventDate "2023.12.12"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "ESP"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. f3 d6 6. Bg5 c5 7. d5 e6 8. Qd2 exd5 9. cxd5 a6 10. a4 Qa5 11. Ra3 Re8 12. Nge2 Nbd7 13. Nc1 Rb8 14. Be2 Qc7 15. a5 b5 16. axb6 Rxb6 17. 0-0 Qb8 18. Na4 Rb4 19. Nd3 Rb3 20. Rfa1 Rxa3 21. Rxa3 Ne5 22. Nxe5 Rxe5 23. Bf4 Re7 24. Qa5 Bd7 25. Qb6 Qe8 26. Nc3 Nxe4 27. Nxe4 Rxe4 28. fxe4 Bd4+ 29. Be3 Qxe4 30. Qd8+ Kg7 31. Qg5 Bb5 32. Qh6+ Kf6 33. Bxd4+ Qxd4+ 34. Qe3 Bxe2 35. Qxd4+ cxd4 36. Kf2 Bb5 37. Rf3+ Ke7 38. g4 Bc4 39. Rf4 Bxd5 40. Rxd4 Bc6 41. g5 Ke6 42. Rf4 Bd5 43. Ke3 Ke5 44. Ra4 Bb7 45. Rb4 Bc6 46. Rb6 Bb5 47. h4 d5 48. b3 d4+ 49. Kd2 Kf5 50. Rd6 d3 51. Rd4 f6 52. Ke3 fxg5 53. Rd5+ Kg4 54. hxg5 Bc6 55. Rc5 Bd7 56. Rc7 Bb5 57. Rc5 Kg3 58. Rc1 Kg4 59. Rc5 Kg3 1/2-1/2

[Event "Sitges Sunway op 10th"]
[Site "Sitges"]
[Date "2023.12.13"]
[Round "2"]
[White "Anwesh, Upadhyaya"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "B08"]
[WhiteElo "2350"]
[BlackElo "1620"]
[PlyCount "103"]
[EventDate "2023.12.12"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "ESP"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. h3 Bg7 5. Nf3 0-0 6. Bg5 c5 7. Be2 cxd4 8. Nxd4 Nc6 9. Nb3 Be6 10. 0-0 Rc8 11. Re1 Na5 12. Nd5 Nc4 13. Bxc4 Rxc4 14. Qd3 b5 15. Bxf6 exf6 16. Ne3 Qb6 17. c3 Rcc8 18. Rad1 Rfd8 19. Nd5 Bxd5 20. Qxd5 a5 21. Qd4 Qc7 22. Qd3 b4 23. Nd4 Qc4 24. Qxc4 Rxc4 25. Nb5 bxc3 26. bxc3 Rb8 27. Rd5 Rc5 28. a4 Rc4 29. Rd4 Rbc8 30. Nxd6 Rxd4 31. cxd4 Rc6 32. Nb7 Rc4 33. d5 Rb4 34. Nxa5 Rxa4 35. Nc6 Kf8 36. f3 Bh6 37. d6 Ke8 38. Rd1 Be3+ 39. Kf1 Kd7 40. Nb8+ Kd8 41. d7 Rc4 42. Rd6 Bf4 43. Nc6+ Rxc6 44. Rxc6 Be5 45. f4 Kxd7 46. Ra6 Bd6 47. Ke2 h5 48. Kd3 g5 49. e5 fxe5 50. fxg5 h4 51. Ke4 Be7 52. Ra7+ 1-0

[Event "Benidorm Bali op-B 20th"]
[Site "Benidorm"]
[Date "2023.12.01"]
[Round "1"]
[White "Shaffer, Alexander"]
[Black "Tudela Gonzalez, Victor"]
[Result "0-1"]
[ECO "E92"]
[WhiteElo "1620"]
[BlackElo "1967"]
[PlyCount "54"]
[EventDate "2023.12.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "CBM 217 Extra"]
[Source "ChessBase"]
[SourceDate "2024.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. 0-0-0 h6 11. Bxf6 Bxf6 12. Nb5 Na6 13. c5 Be6 14. Kb1 Re7 15. Rc1 Rd7 16. c6 bxc6 17. Rxc6 Bxa2+ 18. Ka1 Nb4 19. Rxf6 Be6 20. Nxe5 Rd2 21. Nc3 Rb8 22. Bc4 Nc2+ 23. Ka2 Nd4 24. Rb1 Rb6 25. Rxe6 fxe6 26. Nd3 Rc6 27. Ne5 Rc5 0-1

[Event "Monsaraz op"]
[Site "Monsaraz"]
[Date "2023.11.26"]
[Round "7"]
[White "Daneri, Martin"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "E77"]
[WhiteElo "2004"]
[BlackElo "1634"]
[PlyCount "73"]
[EventDate "2023.11.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POR"]
[SourceTitle "CBM 217 Extra"]
[Source "ChessBase"]
[SourceDate "2024.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.31"]
[SourceQuality "1"]

1. d4 d6 2. c4 Nf6 3. Nc3 g6 4. e4 Bg7 5. f4 0-0 6. Nf3 c5 7. d5 e6 8. Be2 exd5 9. exd5 Re8 10. 0-0 Bf5 11. Bd3 Qd7 12. Qc2 Na6 13. Bxf5 gxf5 14. a3 Nc7 15. a4 Na6 16. Bd2 Nb4 17. Qb1 Ne4 18. Be1 Nxc3 19. bxc3 Na6 20. Qb5 Qe7 21. Bd2 Nc7 22. Qb1 Bxc3 23. Re1 Qf6 24. Bxc3 Qxc3 25. Qxb7 Qa5 26. Qc6 Re4 27. Qxd6 Rae8 28. Rf1 Qb6 29. Qd7 R8e7 30. Qxf5 Rxc4 31. Ne5 Rc3 32. Nc6 Re8 33. Qg5+ Kf8 34. Qf6 c4+ 35. Kh1 Kg8 36. Qxc3 Nxd5 37. Qg3+ 1-0

[Event "Monsaraz op"]
[Site "Monsaraz"]
[Date "2023.11.24"]
[Round "6"]
[White "Shaffer, Alexander"]
[Black "De Kaey, Pascal"]
[Result "1/2-1/2"]
[ECO "A57"]
[WhiteElo "1634"]
[BlackElo "1938"]
[PlyCount "27"]
[EventDate "2023.11.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POR"]
[SourceTitle "CBM 217 Extra"]
[Source "ChessBase"]
[SourceDate "2024.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. d5 b5 4. a4 Bb7 5. c4 bxc4 6. Nc3 d6 7. e4 Nbd7 8. Bxc4 g6 9. 0-0 Bg7 10. h3 0-0 11. Bf4 Qa5 12. Re1 Nh5 13. Bg5 Qd8 14. Qd2 1/2-1/2

[Event "Monsaraz op"]
[Site "Monsaraz"]
[Date "2023.11.22"]
[Round "2"]
[White "Shaffer, Alexander"]
[Black "Cziko, Eduard Carol"]
[Result "0-1"]
[ECO "A47"]
[WhiteElo "1634"]
[BlackElo "1960"]
[PlyCount "70"]
[EventDate "2023.11.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POR"]
[SourceTitle "CBM 217 Extra"]
[Source "ChessBase"]
[SourceDate "2024.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. g3 c5 4. c3 b6 5. Bg2 Bb7 6. 0-0 Be7 7. Bg5 h6 8. Bxf6 Bxf6 9. e3 0-0 10. Nbd2 Qc7 11. Re1 cxd4 12. exd4 b5 13. a4 a6 14. axb5 axb5 15. Qb3 Rxa1 16. Rxa1 Bc6 17. Qa3 d6 18. Qa7 Rc8 19. Qxc7 Rxc7 20. Ne1 b4 21. Bxc6 Nxc6 22. Ra8+ Kh7 23. Nd3 bxc3 24. bxc3 d5 25. f4 Na7 26. Nf3 Nb5 27. Nde5 Nxc3 28. Kf2 Ne4+ 29. Ke2 Bxe5 30. dxe5 g5 31. fxg5 hxg5 32. g4 Rc2+ 33. Ke3 Rg2 34. h4 Rxg4 35. hxg5 Nxg5 0-1

[Event "Monsaraz op"]
[Site "Monsaraz"]
[Date "2023.11.21"]
[Round "1"]
[White "Sherman, Reem"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "C22"]
[WhiteElo "2278"]
[BlackElo "1634"]
[PlyCount "45"]
[EventDate "2023.11.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POR"]
[SourceTitle "CBM 217 Extra"]
[Source "ChessBase"]
[SourceDate "2024.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.31"]
[SourceQuality "1"]

1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 g6 5. h4 Bg7 6. h5 d6 7. Nc3 Nge7 8. Bd2 Be6 9. Nf3 Qd7 10. 0-0-0 0-0-0 11. h6 Bf6 12. Qf4 Be5 13. Qh4 f5 14. Nxe5 Nxe5 15. Bg5 Rhe8 16. f4 Nf7 17. Bf6 fxe4 18. Nxe4 Bg4 19. Re1 Bf5 20. Bd3 d5 21. Nc5 Qc6 22. Bxe7 Bxd3 23. Nxd3 1-0

[Event "PUR-ch"]
[Site "San Juan"]
[Date "2023.09.03"]
[Round "9"]
[White "Serrano Rivera, Oscar A"]
[Black "Shaffer, Alexander"]
[Result "0-1"]
[ECO "B08"]
[WhiteElo "1084"]
[BlackElo "1672"]
[PlyCount "101"]
[EventDate "2023.08.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PUR"]
[SourceTitle "CBM 216 Extra"]
[Source "ChessBase"]
[SourceDate "2023.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.30"]
[SourceQuality "1"]

1. e4 d6 2. Nf3 g6 3. d4 Nf6 4. Nc3 Bg7 5. Bc4 Nc6 6. 0-0 0-0 7. h3 Nxe4 8. Nxe4 d5 9. Bb5 dxe4 10. Bxc6 exf3 11. Bxf3 Qxd4 12. Qxd4 Bxd4 13. c3 Bg7 14. Bf4 e5 15. Bg3 f5 16. Bd5+ Kh8 17. Rad1 c6 18. Bb3 f4 19. Bh4 f3 20. Rfe1 fxg2 21. Kxg2 Bf5 22. Bg3 Rae8 23. Re2 e4 24. Rde1 h5 25. Bc2 Rf6 26. Bxe4 Rfe6 27. Bf3 Rxe2 28. Rxe2 Rxe2 29. Bxe2 a5 30. h4 Bf6 31. Kf3 Bg4+ 32. Ke3 Bxe2 33. Kxe2 Kg7 34. Kd3 Kh6 35. f4 Kg7 36. Kc4 Be7 37. a4 Kf6 38. b4 axb4 39. cxb4 Kf5 40. b5 cxb5+ 41. Kxb5 Bd8 42. a5 Kg4 43. Bf2 Kxf4 44. Bb6 Bxh4 45. Bc7+ Kf3 46. Kb6 Be1 47. Kxb7 Bxa5 48. Bxa5 g5 49. Bd8 g4 50. Bh4 g3 51. Kc6 0-1

[Event "PUR-ch"]
[Site "San Juan"]
[Date "2023.09.03"]
[Round "8"]
[White "Shaffer, Alexander"]
[Black "Deliz Lopez, Adan G"]
[Result "0-1"]
[ECO "E92"]
[WhiteElo "1672"]
[BlackElo "1506"]
[PlyCount "86"]
[EventDate "2023.08.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PUR"]
[SourceTitle "CBM 216 Extra"]
[Source "ChessBase"]
[SourceDate "2023.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 0-0 5. e4 d6 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. 0-0-0 c6 11. Nxe5 Nxe4 12. Nxe4 Bxe5 13. Nf6+ Bxf6 14. Bxf6 Nd7 15. Rxd7 Bxd7 16. Bf3 Bf5 17. Rd1 h5 18. Rd4 Re6 19. Bg5 Rae8 20. Bd1 Re4 21. Rxe4 Rxe4 22. b3 Kg7 23. Be3 a5 24. Kb2 Re7 25. h4 Rd7 26. Be2 Bg4 27. Bxg4 hxg4 28. g3 Kf6 29. Kc3 Ke5 30. a3 Ke4 31. Bb6 a4 32. bxa4 Rd3+ 33. Kb4 Kf3 34. a5 Rd1 35. a6 bxa6 36. Ka5 Rc1 37. Kxa6 Rxc4 38. Kb7 c5 39. Kc6 Kxf2 40. Bxc5+ Kxg3 41. Kb5 Rc2 42. a4 Kxh4 43. Be7+ Kh3 0-1

[Event "PUR-ch"]
[Site "San Juan"]
[Date "2023.09.02"]
[Round "7"]
[White "Ortega Rivera, Gadiel L"]
[Black "Shaffer, Alexander"]
[Result "1/2-1/2"]
[ECO "C13"]
[WhiteElo "1269"]
[BlackElo "1672"]
[PlyCount "77"]
[EventDate "2023.08.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PUR"]
[SourceTitle "CBM 216 Extra"]
[Source "ChessBase"]
[SourceDate "2023.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.30"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. Bg5 Be7 8. c3 0-0 9. Bd3 b6 10. Qc2 h6 11. Bxf6 Bxf6 12. Be4 Rb8 13. 0-0 Bb7 14. Rad1 Bxe4 15. Qxe4 Qd5 16. Qxd5 exd5 17. Ne5 Bxe5 18. dxe5 Rbd8 19. Rfe1 c5 20. f4 Rd7 21. Kf2 Rfd8 22. f5 d4 23. e6 fxe6 24. fxe6 Rd6 25. cxd4 cxd4 26. e7 Re8 27. Re4 Kf7 28. Ke2 Rxe7 29. Rf1+ Ke8 30. Rxe7+ Kxe7 31. Kd3 Ke6 32. Re1+ Kd5 33. Re7 Rg6 34. g3 a5 35. Rd7+ Ke5 36. Rxd4 Rf6 37. Re4+ Kd5 38. Rd4+ Ke5 39. Re4+ 1/2-1/2

[Event "PUR-ch"]
[Site "San Juan"]
[Date "2023.09.02"]
[Round "6"]
[White "Shaffer, Alexander"]
[Black "Sotelo Kohama, Daniel"]
[Result "0-1"]
[ECO "A47"]
[WhiteElo "1672"]
[BlackElo "2056"]
[PlyCount "126"]
[EventDate "2023.08.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PUR"]
[SourceTitle "CBM 216 Extra"]
[Source "ChessBase"]
[SourceDate "2023.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. c3 b6 4. e3 Bb7 5. Bd3 g6 6. 0-0 Bg7 7. Nbd2 d5 8. Ne5 0-0 9. Ndf3 Nbd7 10. Qe2 Rc8 11. a4 Qc7 12. Bd2 c4 13. Bc2 Nxe5 14. Nxe5 Nd7 15. Nxd7 Qxd7 16. a5 b5 17. a6 Bc6 18. e4 dxe4 19. Bxe4 Bxe4 20. Qxe4 e5 21. Rfd1 exd4 22. cxd4 Qxd4 23. Qxd4 Bxd4 24. Bc3 Bc5 25. Rd7 b4 26. Bf6 Rc6 27. Be7 Bxe7 28. Rxe7 c3 29. bxc3 bxc3 30. Kf1 c2 31. Rc1 Rd8 32. Ke2 Kf8 33. Rxa7 Re6+ 34. Kf3 Rd3+ 35. Kf4 Re2 36. Rc7 Rxf2+ 37. Ke4 Ra3 38. R1xc2 Rxc2 39. Rxc2 Rxa6 40. Kf4 Kg7 41. g4 Ra4+ 42. Kg3 Ra3+ 43. Kf4 Rh3 44. Ra2 h6 45. Rb2 g5+ 46. Kf5 Rf3+ 47. Ke5 f6+ 48. Ke6 Re3+ 49. Kd5 Kg6 50. Rf2 Re5+ 51. Kd4 Ra5 52. Ke3 Ra3+ 53. Ke4 Ra4+ 54. Kf3 Rf4+ 55. Kg3 Rxf2 56. Kxf2 h5 57. h3 f5 58. gxf5+ Kxf5 59. Kg3 Ke4 60. Kf2 Kf4 61. Kg2 Ke3 62. Kg3 Ke2 63. Kg2 h4 0-1

[Event "PUR-ch"]
[Site "San Juan"]
[Date "2023.08.27"]
[Round "5"]
[White "Burgos Rodriguez, Edison"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "B02"]
[WhiteElo "1840"]
[BlackElo "1672"]
[PlyCount "73"]
[EventDate "2023.08.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PUR"]
[SourceTitle "CBM 216 Extra"]
[Source "ChessBase"]
[SourceDate "2023.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.30"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. Bc4 e6 4. Nf3 Nb6 5. Bb3 a5 6. c3 a4 7. Bc2 d6 8. d4 Nc6 9. Qe2 Be7 10. Bf4 g5 11. Bg3 h5 12. h4 g4 13. Nfd2 d5 14. Na3 Na5 15. Bd3 Bd7 16. Nc2 c5 17. dxc5 Bxc5 18. Nd4 Bxd4 19. cxd4 Rc8 20. Bf4 Nbc4 21. Nxc4 Nxc4 22. Bg5 Qb6 23. Rb1 Qxd4 24. Bf6 0-0 25. 0-0 Rfe8 26. Rfd1 Qf4 27. Bg5 Qxe5 28. Bxc4 Qc7 29. Bd3 e5 30. Rbc1 Qd6 31. Rxc8 Rxc8 32. Bb5 Bc6 33. Bxc6 bxc6 34. Qa6 Rb8 35. Rc1 Rxb2 36. Rxc6 Qb4 37. Rc8+ 1-0

[Event "PUR-ch"]
[Site "San Juan"]
[Date "2023.08.27"]
[Round "4"]
[White "Shaffer, Alexander"]
[Black "Font Alvelo, Joaquim"]
[Result "1-0"]
[ECO "E11"]
[WhiteElo "1672"]
[BlackElo "2115"]
[PlyCount "109"]
[EventDate "2023.08.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PUR"]
[SourceTitle "CBM 216 Extra"]
[Source "ChessBase"]
[SourceDate "2023.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 Bb4+ 4. Bd2 a5 5. g3 0-0 6. Bg2 Nc6 7. 0-0 Bxd2 8. Qxd2 d6 9. Nc3 Qe7 10. b3 e5 11. dxe5 dxe5 12. Rad1 Bg4 13. h3 Bh5 14. Nd5 Nxd5 15. Qxd5 Rfc8 16. g4 Bg6 17. c5 h5 18. e4 hxg4 19. hxg4 Qf6 20. Qc4 Qf4 21. Nh2 Nd4 22. Rfe1 b5 23. Qc1 Qf6 24. f4 a4 25. f5 Bh7 26. g5 Qe7 27. b4 Kf8 28. Ng4 Ra6 29. f6 gxf6 30. gxf6 Rxf6 31. Nxf6 Qxf6 32. Qe3 Nc2 33. Qh3 Re8 34. Qxh7 Nxe1 35. Rxe1 Ke7 36. Qf5 Qxf5 37. exf5 Kf6 38. Bc6 Rg8+ 39. Kf2 Kxf5 40. Bxb5 a3 41. Re3 Rh8 42. Rxa3 Rh2+ 43. Kg3 Rb2 44. Rf3+ Kg5 45. Rxf7 Rxb4 46. a4 e4 47. Rxc7 Rb3+ 48. Kf2 Kf4 49. Rf7+ Ke5 50. c6 Rb2+ 51. Be2 Rc2 52. c7 Ke6 53. c8Q+ Rxc8 54. Bg4+ Kxf7 55. Bxc8 1-0

[Event "PUR-ch"]
[Site "San Juan"]
[Date "2023.08.26"]
[Round "3"]
[White "Rodriguez Rodriguez, Ian G"]
[Black "Shaffer, Alexander"]
[Result "0-1"]
[ECO "A36"]
[BlackElo "1672"]
[PlyCount "62"]
[EventDate "2023.08.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PUR"]
[SourceTitle "CBM 216 Extra"]
[Source "ChessBase"]
[SourceDate "2023.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.30"]
[SourceQuality "1"]

1. c4 g6 2. Nc3 Bg7 3. g3 Nf6 4. Bg2 0-0 5. e4 d6 6. Nge2 c5 7. 0-0 Nc6 8. d3 e5 9. h3 Ne8 10. Be3 Be6 11. Qd2 Qd7 12. Bh6 Bxh3 13. Bxg7 Kxg7 14. f4 Bxg2 15. Kxg2 f5 16. Rh1 h5 17. Rh4 Nf6 18. Nd5 fxe4 19. Nxf6 Rxf6 20. dxe4 exf4 21. gxf4 Qe6 22. Qd5 Re8 23. Nc3 Re7 24. Qxe6 Rfxe6 25. Kf3 Nd4+ 26. Ke3 Nc2+ 27. Kd3 Nxa1 28. Rh1 Nc2 29. Kxc2 Rxe4 30. Nxe4 Rxe4 31. f5 Rxc4+ 0-1

[Event "PUR-ch"]
[Site "San Juan"]
[Date "2023.08.26"]
[Round "2"]
[White "Shaffer, Alexander"]
[Black "Torres Acosta, Gael"]
[Result "1-0"]
[ECO "E32"]
[WhiteElo "1672"]
[BlackElo "1287"]
[PlyCount "67"]
[EventDate "2023.08.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PUR"]
[SourceTitle "CBM 216 Extra"]
[Source "ChessBase"]
[SourceDate "2023.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 Bb4+ 4. Bd2 Qe7 5. Nc3 0-0 6. e3 d6 7. a3 Bxc3 8. Bxc3 Nbd7 9. Be2 b6 10. 0-0 Bb7 11. b4 Ne4 12. Bb2 c5 13. Qb3 Rab8 14. Rad1 d5 15. dxc5 dxc4 16. Bxc4 bxc5 17. b5 Nb6 18. Ne5 Nd6 19. Be2 Rfc8 20. Bf3 c4 21. Nc6 Bxc6 22. Qc3 f6 23. Bxc6 Na4 24. Qb4 Rxc6 25. Qxa4 Rcb6 26. Bd4 Rxb5 27. Qxa7 R8b7 28. Qa6 e5 29. Bxe5 Qxe5 30. Rxd6 c3 31. a4 Rb2 32. Qc4+ Kf8 33. Rd8+ Ke7 34. Qg8 1-0

[Event "COL-ch"]
[Site "Cartagena"]
[Date "2023.06.12"]
[Round "9"]
[White "Shaffer, Alexander"]
[Black "Buitrago Garces, Maicol"]
[Result "1-0"]
[ECO "C21"]
[WhiteElo "1740"]
[BlackElo "1161"]
[PlyCount "107"]
[EventDate "2023.06.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 e5 2. e4 exd4 3. Nf3 Bb4+ 4. c3 dxc3 5. bxc3 Be7 6. Bc4 c6 7. Qb3 d5 8. exd5 b5 9. Be2 Qxd5 10. Qxd5 cxd5 11. Bxb5+ Bd7 12. a4 a6 13. Bd3 Nf6 14. 0-0 0-0 15. Re1 Nc6 16. Nbd2 Bd6 17. Nb3 h6 18. Be3 Ne5 19. Nxe5 Bxe5 20. Bd4 Bxd4 21. cxd4 Rfe8 22. Nc5 Bc8 23. Rxe8+ Nxe8 24. Rb1 a5 25. Rb6 Nf6 26. Bb5 Kh7 27. Bc6 Ra7 28. Nb3 Bd7 29. Bxd7 Nxd7 30. Rb5 Nf6 31. Rxa5 Rb7 32. Rb5 Rxb5 33. axb5 Nd7 34. Kf1 Kg6 35. Ke2 Kf6 36. Kd3 Nb6 37. Kc3 Ke6 38. Kb4 Kd6 39. Ka5 Kc7 40. Ka6 Nd7 41. Ka7 Nb6 42. Na5 Nc8+ 43. Ka6 Nb6 44. Nc6 Nc8 45. h4 Nd6 46. Ne7 Kb8 47. Nxd5 Nf5 48. Nb4 Nxd4 49. Nc6+ Nxc6 50. bxc6 Kc7 51. Kb5 g6 52. g4 f6 53. Kc5 g5 54. h5 1-0

[Event "COL-ch"]
[Site "Cartagena"]
[Date "2023.06.11"]
[Round "8"]
[White "Valle, Efrain"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "C43"]
[WhiteElo "1961"]
[BlackElo "1740"]
[PlyCount "53"]
[EventDate "2023.06.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Nxe5 d5 5. Bd3 Bd6 6. 0-0 0-0 7. c4 c6 8. cxd5 cxd5 9. Nc3 Nxc3 10. bxc3 Nd7 11. f4 f6 12. Qh5 f5 13. Qh3 g6 14. c4 Nf6 15. cxd5 Qb6 16. Rb1 Qxd4+ 17. Be3 Qa4 18. Nc4 Qd7 19. Qf3 b6 20. Ne5 Qb7 21. Bb5 Bxe5 22. Bc6 Qe7 23. fxe5 Ng4 24. Bxa8 Qh4 25. Bf4 Ba6 26. d6 Bxf1 27. Rxf1 1-0

[Event "COL-ch"]
[Site "Cartagena"]
[Date "2023.06.10"]
[Round "6"]
[White "Payares Diaz, Alejandro"]
[Black "Shaffer, Alexander"]
[Result "0-1"]
[ECO "D40"]
[WhiteElo "1137"]
[BlackElo "1740"]
[PlyCount "114"]
[EventDate "2023.06.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. e3 d5 6. Bd3 Nc6 7. Bd2 0-0 8. a3 cxd4 9. exd4 dxc4 10. Bxc4 Be7 11. Bg5 h6 12. Bh4 a6 13. 0-0 b5 14. Bd3 Bb7 15. Qd2 Rc8 16. Rac1 Na5 17. Ne5 Nb3 18. Qe3 Nxc1 19. Rxc1 Nd5 20. Bxe7 Qxe7 21. Nxd5 Bxd5 22. Bc2 Qg5 23. Qxg5 hxg5 24. Nd7 Rfd8 25. Nb6 Rb8 26. Nxd5 Rxd5 27. Rd1 Rbd8 28. Kf1 Rxd4 29. Rc1 Rc4 30. b3 Rcc8 31. Ke1 Kf8 32. Rd1 Rxd1+ 33. Kxd1 Ke7 34. a4 Kd6 35. axb5 axb5 36. Bd3 Kc5 37. Kd2 Kb4 38. Bc2 Rc3 39. Kc1 Rxb3 40. Bxb3 Kxb3 41. Kb1 Kc3 42. g4 Kd3 43. Kb2 Ke2 44. Kc2 Kxf2 45. h3 e5 46. Kc3 e4 47. h4 gxh4 48. g5 e3 49. g6 fxg6 50. Kb4 e2 51. Kxb5 e1Q 52. Kc5 Qd2 53. Kc4 h3 54. Kb3 h2 55. Kc4 h1Q 56. Kb3 Qb7+ 57. Ka3 Qa5# 0-1

[Event "COL-ch"]
[Site "Cartagena"]
[Date "2023.06.09"]
[Round "4"]
[White "Lacombe Olivera, Jorge Alberto"]
[Black "Shaffer, Alexander"]
[Result "0-1"]
[ECO "E30"]
[WhiteElo "1648"]
[BlackElo "1740"]
[PlyCount "78"]
[EventDate "2023.06.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bd2 c5 6. e3 0-0 7. a3 Bxc3 8. Bxc3 cxd4 9. exd4 d5 10. c5 Nc6 11. Nf3 Ne4 12. Qc2 Qf6 13. Bd3 Nxc3 14. Qxc3 e5 15. dxe5 Re8 16. 0-0 Nxe5 17. Nxe5 Rxe5 18. Rae1 Rxe1 19. Rxe1 Be6 20. Qxf6 gxf6 21. b4 a5 22. b5 Rc8 23. Rc1 Kf8 24. c6 bxc6 25. Rxc6 Rxc6 26. bxc6 Ke7 27. a4 Kd6 28. Bb5 d4 29. Kf1 Bd5 30. c7 Kxc7 31. Ke2 Bc6 32. Bc4 Kd6 33. Kd3 Kc5 34. Bb3 Bxg2 35. Bxf7 Bf1+ 36. Kc2 Bc4 37. Be8 Kb4 38. Kd2 Bb3 39. Kd3 Bxa4 0-1

[Event "COL-ch"]
[Site "Cartagena"]
[Date "2023.06.08"]
[Round "2"]
[White "Corredor Rengifo, Luis Fernando"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "D32"]
[WhiteElo "2140"]
[BlackElo "1740"]
[PlyCount "49"]
[EventDate "2023.06.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. dxc5 d4 6. Na4 b5 7. cxb6 axb6 8. b3 Nc6 9. Nf3 Nf6 10. g3 Bb4+ 11. Bd2 Ne4 12. Bxb4 Nxb4 13. a3 b5 14. axb4 bxa4 15. bxa4 Nc3 16. Qxd4 Qxd4 17. Nxd4 Bb7 18. f3 Nxa4 19. e4 0-0 20. Bb5 Nc3 21. Kd2 Nxb5 22. Nxb5 Rfd8+ 23. Ke3 Ba6 24. Nc7 Rd3+ 25. Kf4 1-0

[Event "Wch Seniors 65 30th"]
[Site "Assisi"]
[Date "2022.11.20"]
[Round "6"]
[White "Tsynman, Boris"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "2045"]
[BlackElo "1688"]
[PlyCount "69"]
[EventDate "2022.11.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "ITA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. g3 Bg7 5. Bg2 0-0 6. Nge2 Nc6 7. h3 e5 8. d5 Ne7 9. 0-0 Ne8 10. Be3 f5 11. Qd2 Nf6 12. Kh2 fxe4 13. g4 c6 14. dxc6 bxc6 15. Rad1 d5 16. Nxe4 Nxe4 17. Bxe4 Qc7 18. Bg2 e4+ 19. Kg1 Ba6 20. c3 Nc8 21. Rfe1 Bxe2 22. Rxe2 Qa5 23. c4 Qxa2 24. cxd5 Rb8 25. Bd4 cxd5 26. Bxg7 Kxg7 27. Qxd5 Qxd5 28. Rxd5 Nb6 29. Ra5 Rf7 30. Rxe4 Rc8 31. Re2 Rc1+ 32. Kh2 Rfc7 33. Kg3 Nc4 34. Rb5 a5 35. b3 1-0

[Event "Wch Seniors 65 30th"]
[Site "Assisi"]
[Date "2022.11.19"]
[Round "5"]
[White "Shaffer, Alexander"]
[Black "Koehler, Gerhard"]
[Result "0-1"]
[ECO "B86"]
[WhiteElo "1688"]
[BlackElo "2198"]
[PlyCount "104"]
[EventDate "2022.11.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "ITA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. 0-0 Qc7 8. Bb3 Bd7 9. f4 Nc6 10. Be3 Na5 11. Qf3 Nxb3 12. axb3 Bc6 13. f5 e5 14. Nde2 b5 15. g4 Qb7 16. Ng3 d5 17. exd5 Nxd5 18. Nxd5 Bxd5 19. Qf2 f6 20. Rad1 Be7 21. Bc5 Bc6 22. Bxe7 Qxe7 23. Qb6 Qb7 24. Qc5 Rc8 25. Rd6 0-0 26. Qf2 Rfd8 27. Rfd1 Rxd6 28. Rxd6 Qe7 29. Re6 Qd7 30. h3 Qd1+ 31. Nf1 Qd5 32. Kh2 Rd8 33. Ne3 Qe4 34. Kg3 Kf7 35. Kh4 h5 36. Kg3 g5 37. Ng2 h4+ 38. Kh2 Rd7 39. b4 Bb7 40. Nxh4 Qh1+ 41. Kg3 gxh4+ 42. Kxh4 Rd8 43. Rxf6+ Kxf6 44. Qb6+ Qc6 45. Qxd8+ Kf7 46. Qh8 Qf6+ 47. Qxf6+ Kxf6 48. Kg3 Be4 49. c3 Bc2 50. h4 Bd1 51. Kh3 e4 52. Kg3 e3 0-1

[Event "Wch Seniors 65 30th"]
[Site "Assisi"]
[Date "2022.11.18"]
[Round "4"]
[White "Hebert, Jean"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "D78"]
[WhiteElo "2333"]
[BlackElo "1688"]
[PlyCount "79"]
[EventDate "2022.11.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "ITA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 g6 4. 0-0 Bg7 5. c4 c6 6. d4 0-0 7. Qb3 dxc4 8. Qxc4 Nbd7 9. Nc3 Nb6 10. Qd3 Be6 11. Rd1 Qc8 12. e4 Rd8 13. Qf1 Bc4 14. Qe1 Be6 15. b3 Bh3 16. Ba3 Bxg2 17. Kxg2 e6 18. Rac1 Qd7 19. h3 Qe8 20. Qe2 a5 21. e5 Nfd5 22. Ne4 a4 23. Bc5 Nc8 24. Qb2 axb3 25. Qxb3 Nce7 26. Nd6 Qd7 27. Qxb7 Rxa2 28. Qxd7 Rxd7 29. Ra1 Rxa1 30. Rxa1 Rd8 31. Ng5 Rf8 32. Ra7 h6 33. Nge4 Nc8 34. Nxc8 Rxc8 35. Rxf7 Rb8 36. Ra7 g5 37. Bd6 Re8 38. Ra6 Rc8 39. Nc5 Nb4 40. Ra4 1-0

[Event "Wch Seniors 65 30th"]
[Site "Assisi"]
[Date "2022.11.17"]
[Round "3"]
[White "Shaffer, Alexander"]
[Black "Werner, Clemens"]
[Result "1-0"]
[ECO "B15"]
[WhiteElo "1688"]
[BlackElo "2236"]
[PlyCount "41"]
[EventDate "2022.11.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "ITA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 g6 4. Nf3 Bg7 5. h3 Nf6 6. e5 Ne4 7. Bd3 Bf5 8. 0-0 Nxc3 9. bxc3 Qd7 10. a4 0-0 11. Ba3 Re8 12. Re1 Bxd3 13. Qxd3 Na6 14. Ng5 Nc7 15. Rab1 Rab8 16. f4 Bh6 17. Qd2 f6 18. Nf3 Qf5 19. Bc1 Ne6 20. g4 Qxf4 21. Qg2 1-0

[Event "Wch Seniors 65 30th"]
[Site "Assisi"]
[Date "2022.11.16"]
[Round "2"]
[White "Gundersen, Helge Folmer"]
[Black "Shaffer, Alexander"]
[Result "0-1"]
[ECO "B25"]
[WhiteElo "2092"]
[BlackElo "1688"]
[PlyCount "82"]
[EventDate "2022.11.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "ITA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. e4 d6 2. Nc3 Nf6 3. f4 g6 4. Nf3 Bg7 5. g3 0-0 6. Bg2 c5 7. 0-0 Nc6 8. d3 Rb8 9. a4 a6 10. h3 b5 11. axb5 axb5 12. g4 b4 13. Ne2 Ne8 14. f5 Nc7 15. Qe1 Nb5 16. Qh4 Nbd4 17. Nexd4 Nxd4 18. Nxd4 Bxd4+ 19. Kh1 Bb7 20. fxg6 fxg6 21. Rxf8+ Qxf8 22. Bh6 Qf7 23. Rf1 Qe6 24. b3 Bf6 25. g5 Bg7 26. Bxg7 Kxg7 27. Qf4 Qg8 28. e5 Bxg2+ 29. Kxg2 Qd5+ 30. Qf3 Qxe5 31. Qf7+ Kh8 32. h4 Qe2+ 33. Rf2 Qg4+ 34. Kf1 Ra8 35. Qf3 Qxf3 36. Rxf3 Kg7 37. Ke2 Rf8 38. Re3 e5 39. Rh3 Rf4 40. Ke3 Kf7 41. h5 Rg4 0-1

[Event "Cuiaba Contaud op"]
[Site "Cuiaba"]
[Date "2022.10.26"]
[Round "3"]
[White "Pires, Washington Gabriel"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "E83"]
[WhiteElo "1921"]
[BlackElo "1684"]
[PlyCount "77"]
[EventDate "2022.10.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 g6 2. c4 Nf6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Bd3 Nc6 7. Nge2 e5 8. d5 Nd4 9. Be3 Nh5 10. Qd2 f5 11. 0-0-0 c5 12. Rhf1 Qa5 13. Kb1 Bd7 14. h3 f4 15. Bf2 Rab8 16. Be1 a6 17. Nxd4 cxd4 18. Ne2 Qxd2 19. Bxd2 b5 20. Rc1 bxc4 21. Bxc4 Bb5 22. Bxb5 axb5 23. Rc6 Rfd8 24. Rfc1 Bf8 25. Rc7 Nf6 26. R1c6 Nd7 27. Nc1 Nb6 28. b3 Na8 29. Ba5 Nxc7 30. Bxc7 Rdc8 31. Bxb8 Rxb8 32. Nd3 Rb7 33. Rc8 Kf7 34. Nb4 Be7 35. Na6 Bh4 36. Nc7 d3 37. Na6 d2 38. Kc2 Ra7 39. Rc7+ 1-0

[Event "Cuiaba Contaud op"]
[Site "Cuiaba"]
[Date "2022.10.26"]
[Round "2"]
[White "Shaffer, Alexander"]
[Black "Luz, Arthur Nader"]
[Result "0-1"]
[ECO "E94"]
[WhiteElo "1684"]
[BlackElo "2154"]
[PlyCount "64"]
[EventDate "2022.10.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d6 5. e4 0-0 6. Be2 Nbd7 7. 0-0 e5 8. dxe5 dxe5 9. Qc2 c6 10. Rd1 Qe7 11. h3 Re8 12. Be3 Nc5 13. b4 Ne6 14. c5 Nh5 15. Bc4 Nhf4 16. a3 Ng5 17. Nd2 Ngxh3+ 18. gxh3 Qg5+ 19. Kf1 Bxh3+ 20. Ke1 Ng2+ 21. Ke2 Nxe3 22. fxe3 Qg2+ 23. Kd3 Rad8+ 24. Nd5 cxd5 25. Bxd5 Rxd5+ 26. exd5 Qxd5+ 27. Ke2 Qg2+ 28. Ke1 Bg4 29. Qc4 Bf6 30. Nf3 Bxf3 31. Rd7 Bh4+ 32. Qxh4 Qe2# 0-1

[Event "Matinhos op 6th"]
[Site "Matinhos"]
[Date "2022.09.23"]
[Round "7.15"]
[White "Shaffer, Alexander"]
[Black "Espindola, Carlos Marcelo"]
[Result "1-0"]
[ECO "E91"]
[WhiteElo "1698"]
[BlackElo "1438"]
[PlyCount "63"]
[EventDate "2022.09.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d6 5. e4 0-0 6. Be2 Nbd7 7. 0-0 c5 8. d5 a6 9. a4 Rb8 10. a5 b5 11. axb6 Qxb6 12. Nd2 Ne5 13. h3 a5 14. f4 Ned7 15. Qa4 Ra8 16. Ra3 Qc7 17. Nf3 Nb6 18. Qc2 Bd7 19. Be3 Rfb8 20. Rfa1 Be8 21. g4 Qd8 22. Bd2 Nfd7 23. Nb5 Nf6 24. Rxa5 Bxb5 25. Rxa8 Rxa8 26. Rxa8 Qxa8 27. cxb5 Qa1+ 28. Kg2 Nfd7 29. Bc3 Bxc3 30. bxc3 Na4 31. c4 Nc3 32. e5 1-0

[Event "Matinhos op 6th"]
[Site "Matinhos"]
[Date "2022.09.22"]
[Round "6.10"]
[White "Nunes, Sidney Jr"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "C10"]
[WhiteElo "2070"]
[BlackElo "1698"]
[PlyCount "57"]
[EventDate "2022.09.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Qd5 5. Ng3 c5 6. Nf3 cxd4 7. Qxd4 Nf6 8. Qh4 Nc6 9. Bc4 Qa5+ 10. Bd2 Bb4 11. c3 Be7 12. 0-0 0-0 13. b4 Qc7 14. Bb3 b6 15. Rfe1 Bb7 16. Bf4 Qc8 17. Ng5 Nd8 18. Nxh7 Nxh7 19. Qxe7 Qc6 20. f3 Nf6 21. Rac1 Rc8 22. Qd6 b5 23. Qe5 a5 24. bxa5 Ra8 25. Qg5 Rxa5 26. Be5 Qc5+ 27. Kh1 b4 28. Nf5 exf5 29. Bxf6 1-0

[Event "Matinhos op 6th"]
[Site "Matinhos"]
[Date "2022.09.21"]
[Round "5.15"]
[White "Shaffer, Alexander"]
[Black "Santana, Expedito"]
[Result "1-0"]
[ECO "D06"]
[WhiteElo "1698"]
[BlackElo "1458"]
[PlyCount "47"]
[EventDate "2022.09.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Bf5 3. c4 e6 4. Nc3 Bb4 5. Qa4+ Nc6 6. cxd5 Qxd5 7. Bd2 Bxc3 8. Bxc3 Nf6 9. Ne5 0-0 10. Nxc6 bxc6 11. f3 Qb5 12. Qa3 Qb7 13. e3 h6 14. Ba6 Qb8 15. 0-0 Bh7 16. Rac1 Nd5 17. Bd2 Qb6 18. Rc5 Rab8 19. b3 Nb4 20. Bxb4 Qxb4 21. Qxb4 Rxb4 22. Rxc6 Rb6 23. Rfc1 Rfb8 24. Rxc7 1-0

[Event "Matinhos op 6th"]
[Site "Matinhos"]
[Date "2022.09.20"]
[Round "4.10"]
[White "Rosa, Gabriel Redon"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "B08"]
[WhiteElo "1837"]
[BlackElo "1698"]
[PlyCount "63"]
[EventDate "2022.09.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 0-0 6. h3 Nc6 7. d5 Nb8 8. 0-0 c6 9. Be3 Nbd7 10. Nd4 c5 11. Nb3 a6 12. a4 Rb8 13. a5 b5 14. axb6 Qxb6 15. Qd2 Ne8 16. Bh6 Bxh6 17. Qxh6 Nc7 18. Qd2 Nb5 19. Na4 Qc7 20. f4 Nb6 21. f5 c4 22. Nd4 Bd7 23. Nc3 Qc5 24. Ncxb5 axb5 25. fxg6 fxg6 26. c3 Na4 27. Kh1 b4 28. Bg4 bxc3 29. bxc3 Bxg4 30. hxg4 Rxf1+ 31. Rxf1 Nb6 32. Ne6 1-0

[Event "Matinhos op 6th"]
[Site "Matinhos"]
[Date "2022.09.20"]
[Round "3.17"]
[White "Shaffer, Alexander"]
[Black "Alves, Yan Gomes"]
[Result "1-0"]
[ECO "D53"]
[WhiteElo "1698"]
[BlackElo "1800"]
[PlyCount "59"]
[EventDate "2022.09.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Nc6 5. Bg5 Be7 6. e3 0-0 7. Rc1 Re8 8. Bd3 Nd7 9. Bf4 Bb4 10. 0-0 Bxc3 11. Rxc3 Nb4 12. Bxh7+ Kxh7 13. Ng5+ Kg8 14. Qh5 Qf6 15. a3 Nc6 16. Qh7+ Kf8 17. Bxc7 Qh6 18. cxd5 Nf6 19. Qxh6 gxh6 20. Nxe6+ fxe6 21. dxc6 bxc6 22. Rxc6 Bb7 23. Bd6+ Kg8 24. Rc7 Bd5 25. Be5 Ne4 26. Rfc1 Ng5 27. Rg7+ Kf8 28. Rcc7 Rec8 29. Bd6+ Ke8 30. Rg8# 1-0

[Event "Matinhos op 6th"]
[Site "Matinhos"]
[Date "2022.09.19"]
[Round "2.17"]
[White "Bastos, Ricardo Alves"]
[Black "Shaffer, Alexander"]
[Result "1/2-1/2"]
[ECO "E76"]
[WhiteElo "1421"]
[BlackElo "1698"]
[PlyCount "80"]
[EventDate "2022.09.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. c4 g6 2. d4 Nf6 3. Nc3 Bg7 4. e4 d6 5. f4 0-0 6. Nf3 c5 7. e5 dxe5 8. fxe5 Ng4 9. h3 cxd4 10. hxg4 dxc3 11. Qxd8 Rxd8 12. bxc3 Bxg4 13. Bf4 Bxf3 14. gxf3 Nc6 15. Rb1 Nxe5 16. Be2 Nd3+ 17. Bxd3 Rxd3 18. Rxb7 Rxf3 19. Bd2 e6 20. Ke2 Rf5 21. Rhb1 h5 22. Be3 Ra5 23. c5 Rxa2+ 24. Kd3 Ra6 25. Kc4 Rc6 26. Rb8+ Rc8 27. Rxa8 Rxa8 28. Rb7 Be5 29. c6 h4 30. Kc5 a5 31. Bd4 Bg3 32. c7 a4 33. Kc6 Rc8 34. Kd7 Rxc7+ 35. Rxc7 Bxc7 36. Kxc7 h3 37. Be5 a3 38. c4 a2 39. c5 h2 40. Bxh2 a1Q 1/2-1/2

[Event "Matinhos op 6th"]
[Site "Matinhos"]
[Date "2022.09.18"]
[Round "1.4"]
[White "Shaffer, Alexander"]
[Black "Matsuura, Everaldo"]
[Result "0-1"]
[ECO "D43"]
[WhiteElo "1698"]
[BlackElo "2437"]
[PlyCount "60"]
[EventDate "2022.09.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 c6 5. Bg5 h6 6. Bh4 dxc4 7. a4 Bb4 8. e3 b5 9. Ne5 Bb7 10. Be2 Nbd7 11. 0-0 Nxe5 12. dxe5 Qxd1 13. Rfxd1 Bxc3 14. bxc3 Ne4 15. Ra3 g5 16. Bf3 Nc5 17. axb5 cxb5 18. Bxb7 Nxb7 19. Bg3 a6 20. f3 Ke7 21. h4 Rhd8 22. Rd4 Nc5 23. hxg5 hxg5 24. Kf1 Nb3 25. Rd6 Rxd6 26. exd6+ Kd7 27. e4 Nd2+ 28. Ke2 Nb1 29. Ra1 Nxc3+ 30. Kd2 b4 0-1

[Event "Posadas Misionera op"]
[Site "Posadas"]
[Date "2022.08.15"]
[Round "5"]
[White "Miranda Fernandez, Marcos Manuel"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1564"]
[BlackElo "1735"]
[PlyCount "83"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "ARG"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 c6 5. Qd2 Qc7 6. 0-0-0 Nbd7 7. f3 b5 8. g4 Nb6 9. Bf4 b4 10. Nb1 a5 11. e5 Nfd5 12. Nh3 h5 13. exd6 exd6 14. Re1+ Be7 15. Nf2 Nxf4 16. Qxf4 Be6 17. Ne4 Nd5 18. Qg3 hxg4 19. fxg4 Bh4 20. Qxd6 Qxd6 21. Nxd6+ Kd7 22. Rxe6 Kxe6 23. Ne4 f5 24. Nc5+ Kd6 25. Nd2 Bg5 26. Bd3 Rae8 27. gxf5 gxf5 28. Bxf5 Re2 29. Nce4+ Ke7 30. Nxg5 Rhxh2 31. Rd1 Ne3 32. Ngf3 Rhg2 33. Bd3 Nxd1 34. Bxe2 Ne3 35. Bd3 Nd5 36. Ne4 Nf4 37. Ne5 Nxd3+ 38. cxd3 Rg1+ 39. Kc2 Rg2+ 40. Kb3 a4+ 41. Kxa4 Rxb2 42. Nxc6+ 1-0

[Event "Posadas Misionera op"]
[Site "Posadas"]
[Date "2022.08.14"]
[Round "4"]
[White "Shaffer, Alexander"]
[Black "Franco Franchi, Renato"]
[Result "1/2-1/2"]
[ECO "C41"]
[WhiteElo "1735"]
[BlackElo "1568"]
[PlyCount "120"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "ARG"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d6 3. Nc3 Nbd7 4. e4 e5 5. Bc4 Be7 6. 0-0 c6 7. a4 0-0 8. Re1 c5 9. dxc5 Nxc5 10. h3 Be6 11. Bxe6 Nxe6 12. Nd5 Nxd5 13. Qxd5 Qd7 14. Nxe5 Qc7 15. Nc4 Rac8 16. b3 Bf6 17. Ba3 Nf4 18. Qd2 Bxa1 19. Bxd6 Bc3 20. Qxf4 Qc6 21. Re3 Rfe8 22. Rxc3 Rxe4 23. Qg3 Re6 24. Be5 Rg6 25. Qf3 Qxf3 26. Rxf3 Re6 27. Re3 a6 28. Bg3 Rxe3 29. Nxe3 Kf8 30. a5 g6 31. Kf1 Ke7 32. c4 f5 33. Ke2 Kd7 34. Kd3 Kc6 35. Nd5 Rd8 36. Kd4 g5 37. Be5 g4 38. h4 Re8 39. b4 Rf8 40. g3 Rf7 41. Ke3 Kd7 42. b5 axb5 43. cxb5 Ke6 44. a6 bxa6 45. Bf4 Kxd5 46. bxa6 Ra7 47. Bb8 Rxa6 48. Kf4 Ke6 49. Bc7 h6 50. Ke3 Ra3+ 51. Ke2 h5 52. Bb6 Ke5 53. Be3 Ke4 54. Bf4 Ra2+ 55. Bd2 Rxd2+ 56. Kxd2 Kf3 57. Ke1 f4 58. gxf4 Kxf4 59. Kf1 Kf3 60. Kg1 Ke2 1/2-1/2

[Event "Posadas Misionera op"]
[Site "Posadas"]
[Date "2022.08.14"]
[Round "3"]
[White "Torales G, Ivan Alejandro B"]
[Black "Shaffer, Alexander"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "1311"]
[BlackElo "1735"]
[PlyCount "102"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "ARG"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 a6 5. Bc4 b5 6. Bb3 b4 7. Nd5 Nxd5 8. Bxd5 c6 9. Bb3 Bg7 10. Nf3 0-0 11. h3 Nd7 12. Qd2 a5 13. c3 a4 14. Bc2 bxc3 15. bxc3 Nb6 16. Bd3 Ba6 17. Bh6 Bxd3 18. Bxg7 Kxg7 19. Qxd3 Qc8 20. 0-0 Qa6 21. Qe3 Nc4 22. Qg5 f6 23. Qg4 e5 24. Rad1 Qc8 25. Qh4 Rb8 26. dxe5 dxe5 27. Nd2 Qe6 28. Nxc4 Qxc4 29. f4 Rbd8 30. fxe5 Qc5+ 31. Qf2 Qxe5 32. Rxd8 Rxd8 33. Qa7+ Kg8 34. Qxa4 Qxc3 35. Qa7 Rd2 36. Qb8+ Kg7 37. Qc7+ Kh6 38. Qf4+ Kg7 39. e5 f5 40. Qg5 Qd4+ 41. Kh1 Rd1 42. Qe7+ Kh6 43. Qf8+ Kh5 44. Rxd1 Qxd1+ 45. Kh2 Qd4 46. Qd6 Qf4+ 47. Kg1 Qe3+ 48. Kf1 c5 49. Qa6 Qf4+ 50. Ke1 Qc1+ 51. Kf2 Qf4+ 1/2-1/2

[Event "Posadas Misionera op"]
[Site "Posadas"]
[Date "2022.08.13"]
[Round "1"]
[White "De Sousa, Thiago Benjamin"]
[Black "Shaffer, Alexander"]
[Result "0-1"]
[ECO "E81"]
[WhiteElo "1354"]
[BlackElo "1735"]
[PlyCount "52"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "ARG"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Bd3 Nc6 7. Nge2 e5 8. dxe5 Nxe5 9. 0-0 h5 10. Bg5 Qe8 11. Bxf6 Bxf6 12. Nf4 c6 13. b4 Nxf3+ 14. Qxf3 Bxc3 15. Rab1 Bg4 16. Qg3 Bg7 17. h3 Bd7 18. Qf3 Qe5 19. g4 hxg4 20. hxg4 Qg5 21. Nh3 Qxg4+ 22. Qxg4 Bxg4 23. Ng5 Rae8 24. Rf4 f5 25. Rbf1 Be5 26. R4f2 Bd4 0-1

[Event "Posadas Misionera op"]
[Site "Posadas"]
[Date "2022.08.13"]
[Round "2"]
[White "Shaffer, Alexander"]
[Black "Martinez Cura, Fabricio"]
[Result "1/2-1/2"]
[ECO "D63"]
[WhiteElo "1735"]
[BlackElo "1551"]
[PlyCount "56"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "ARG"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. Nc3 b6 5. Bg5 Bb7 6. cxd5 exd5 7. e3 Be7 8. Be2 Nbd7 9. 0-0 0-0 10. Rc1 Re8 11. h3 h6 12. Bf4 c6 13. a3 Nf8 14. Ne5 Bd6 15. b4 N6d7 16. Nxc6 Bxc6 17. Bxd6 Nf6 18. Bg3 Qd7 19. Qb3 Ne6 20. b5 Bb7 21. Rc2 Rac8 22. Rfc1 Ng5 23. h4 Nge4 24. Nxe4 Nxe4 25. Rxc8 Rxc8 26. Rxc8+ Qxc8 27. Bh2 Qc1+ 28. Qd1 Qxa3 1/2-1/2

[Event "Florianopolis Winter op 6th"]
[Site "Florianopolis"]
[Date "2022.07.17"]
[Round "9"]
[White "Pereira, Aline Vitoria"]
[Black "Shaffer, Alexander"]
[Result "1/2-1/2"]
[ECO "E85"]
[WhiteElo "1312"]
[BlackElo "1759"]
[PlyCount "68"]
[EventDate "2022.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 Nc6 7. Qd2 a6 8. Nge2 Rb8 9. g4 e5 10. d5 Ne7 11. Ng3 Bd7 12. h4 b5 13. Bh6 Bxh6 14. Qxh6 Kh8 15. h5 Nfg8 16. Qd2 b4 17. Nd1 Nc8 18. hxg6 fxg6 19. Qh2 Qe7 20. Be2 Nb6 21. Nf2 Na4 22. 0-0-0 b3 23. a3 Qg5+ 24. Kb1 Rf7 25. Qh3 Qe7 26. Qg2 Nc5 27. Rh2 Rbf8 28. Re1 Rg7 29. g5 Rff7 30. Nf1 a5 31. Ne3 a4 32. Neg4 Bxg4 33. Qxg4 Qd7 34. Qg3 Qe7 1/2-1/2

[Event "Florianopolis Winter op 6th"]
[Site "Florianopolis"]
[Date "2022.07.16"]
[Round "7"]
[White "Duarte, Giovanna Torqui"]
[Black "Shaffer, Alexander"]
[Result "0-1"]
[ECO "A48"]
[WhiteElo "1048"]
[BlackElo "1759"]
[PlyCount "72"]
[EventDate "2022.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 g6 3. e3 Bg7 4. Bd3 0-0 5. Nf3 d6 6. 0-0 b6 7. c4 c5 8. d5 Na6 9. a3 Nc7 10. Bg5 a6 11. Nc3 Rb8 12. a4 h6 13. Bf4 Nh5 14. Re1 Bd7 15. Qe2 Qe8 16. Bg3 Nxg3 17. hxg3 b5 18. axb5 axb5 19. cxb5 Nxb5 20. Qc2 Nc7 21. e4 Rb4 22. Ra2 Qb8 23. Rb1 Qb6 24. Nd2 Rb8 25. Na4 Qb7 26. Nc4 Ra8 27. b3 Nb5 28. Qd1 Nd4 29. Nd2 Rb8 30. Ra3 Bb5 31. Bxb5 Qxb5 32. f4 Qd3 33. Kh2 Ne2 34. Kh1 Nxg3+ 35. Kg1 Ne2+ 36. Kh1 Nxf4 0-1

[Event "Florianopolis Winter op 6th"]
[Site "Florianopolis"]
[Date "2022.07.16"]
[Round "8"]
[White "Shaffer, Alexander"]
[Black "Blaskosky, Vinicius"]
[Result "1-0"]
[ECO "B28"]
[WhiteElo "1759"]
[BlackElo "1233"]
[PlyCount "37"]
[EventDate "2022.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 a6 3. c3 e6 4. d4 cxd4 5. cxd4 d5 6. e5 Ne7 7. Nc3 Nf5 8. Bd3 Be7 9. 0-0 0-0 10. g4 Nh4 11. Nxh4 Bxh4 12. f4 Be7 13. f5 exf5 14. gxf5 Nd7 15. Nxd5 Bg5 16. f6 Bxc1 17. Rxc1 gxf6 18. exf6 Nb6 19. Qh5 1-0

[Event "Florianopolis Winter op 6th"]
[Site "Florianopolis"]
[Date "2022.07.15"]
[Round "5"]
[White "Shaffer, Alexander"]
[Black "Oliveira, Isaac Rodrigues"]
[Result "0-1"]
[ECO "E11"]
[WhiteElo "1759"]
[BlackElo "1275"]
[PlyCount "56"]
[EventDate "2022.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 Bb4+ 4. Nbd2 Ne4 5. e3 Nxd2 6. Nxd2 b6 7. Bd3 Bb7 8. 0-0 Qg5 9. Nf3 Qh5 10. e4 0-0 11. d5 f5 12. Qe2 fxe4 13. Qxe4 Bd6 14. h3 exd5 15. cxd5 Bxd5 16. Bc4 Bxc4 17. Qxc4+ Kh8 18. Be3 Nc6 19. Rad1 Ne5 20. Nxe5 Qxe5 21. g3 Qxb2 22. Bd4 Qb4 23. Qd5 Rae8 24. Qg5 Rf7 25. h4 Kg8 26. h5 h6 27. Qg6 Re6 28. Qd3 Qa5 0-1

[Event "Florianopolis Winter op 6th"]
[Site "Florianopolis"]
[Date "2022.07.14"]
[Round "4"]
[White "De Carvalho, Vitor Augusto Ponci"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "1999"]
[BlackElo "1759"]
[PlyCount "61"]
[EventDate "2022.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 e6 2. Qe2 c5 3. Nf3 Nc6 4. g3 g6 5. Bg2 Bg7 6. 0-0 Nge7 7. c3 0-0 8. d3 d6 9. Re1 e5 10. a3 h6 11. b4 Be6 12. Bb2 Qd7 13. Nbd2 Bh3 14. b5 Bxg2 15. Kxg2 Nd8 16. d4 exd4 17. cxd4 Ne6 18. Nb3 cxd4 19. Nbxd4 Rac8 20. Nxe6 Qxe6 21. Bxg7 Kxg7 22. Qb2+ Kg8 23. Rad1 Rfd8 24. Qb4 Qf6 25. Qa5 a6 26. bxa6 Nc6 27. Qb6 bxa6 28. Qxa6 Nb8 29. Qb6 Rc3 30. Re3 Nc6 31. Qb2 1-0

[Event "Florianopolis Winter op 6th"]
[Site "Florianopolis"]
[Date "2022.07.14"]
[Round "3"]
[White "Shaffer, Alexander"]
[Black "Mariani, Daniel Brandao"]
[Result "0-1"]
[ECO "D15"]
[WhiteElo "1759"]
[BlackElo "2028"]
[PlyCount "152"]
[EventDate "2022.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 a6 5. e3 b5 6. b3 Bg4 7. h3 Bxf3 8. Qxf3 e6 9. Bd3 Bb4 10. Bd2 Qa5 11. Rc1 Bxc3 12. Bxc3 Qxa2 13. Qd1 bxc4 14. bxc4 dxc4 15. Bc2 Qa3 16. Qd2 Nd5 17. Be4 Nxc3 18. Qxc3 Qxc3+ 19. Rxc3 Kd7 20. 0-0 Rc8 21. Rfc1 Ra7 22. Rxc4 Kd6 23. Kf1 Rac7 24. Ke2 f5 25. Bd3 c5 26. Kd2 cxd4 27. Rxd4+ Ke7 28. Rxc7+ Rxc7 29. Ra4 Rc6 30. h4 Kf6 31. g4 h6 32. f3 Rd6 33. Ke2 Nd7 34. Ra5 fxg4 35. fxg4 g5 36. hxg5+ hxg5 37. Bxa6 Ne5 38. Bc8 Nxg4 39. Ra6 Rxa6 40. Bxa6 Ke5 41. Kf3 Nf6 42. Bd3 Kd5 43. Bc2 Kc4 44. Bb1 Kc5 45. Bd3 Kd5 46. Bb1 Kd6 47. Bc2 Ke7 48. Bb3 e5 49. Bc2 Kf8 50. Bf5 Kg7 51. Kg3 Kh6 52. Be6 Kg6 53. Kf3 Kh5 54. Kg3 g4 55. Bf5 Kg5 56. Be6 Ne4+ 57. Kg2 Kh4 58. Bd5 Nc3 59. Bb3 Kh5 60. Kh2 Kg5 61. Kg3 Ne4+ 62. Kg2 Nd6 63. Kf2 Kh4 64. Kg2 Nf5 65. e4 Nd4 66. Bd1 Ne6 67. Bb3 Nf4+ 68. Kh2 g3+ 69. Kg1 Kg5 70. Bc4 Kf6 71. Ba6 Ke7 72. Bc8 Kd6 73. Ba6 Kc5 74. Bc8 Kd4 75. Bf5 Ke3 76. Kf1 Kf3 0-1

[Event "Florianopolis Winter op 6th"]
[Site "Florianopolis"]
[Date "2022.07.13"]
[Round "2"]
[White "Cazao, Sophia Guidi Peplau"]
[Black "Shaffer, Alexander"]
[Result "0-1"]
[ECO "D36"]
[WhiteElo "1800"]
[BlackElo "1759"]
[PlyCount "74"]
[EventDate "2022.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bg5 0-0 6. e3 Nbd7 7. cxd5 exd5 8. Bd3 c6 9. 0-0 Re8 10. Qc2 Nf8 11. Rfe1 g6 12. a3 Ne6 13. e4 Nxg5 14. Nxg5 dxe4 15. Ngxe4 Nxe4 16. Rxe4 Bf5 17. Re3 Bxd3 18. Qxd3 Bf6 19. Rxe8+ Qxe8 20. d5 Rd8 21. Qf3 Bxc3 22. bxc3 Rxd5 23. h3 Qd7 24. c4 Rd3 25. Qe2 Qd4 26. Qe8+ Kg7 27. Re1 Rd1 28. Rxd1 Qxd1+ 29. Kh2 Qd6+ 30. g3 h5 31. h4 Qd4 32. Kg2 Qxc4 33. Qe5+ Kh7 34. Qe7 Qd5+ 35. Kh2 c5 36. Qc7 c4 37. Kg1 Kg7 0-1

[Event "Florianopolis Winter op 6th"]
[Site "Florianopolis"]
[Date "2022.07.13"]
[Round "1"]
[White "Shaffer, Alexander"]
[Black "Pires, Marcos Vinicius Tor"]
[Result "1/2-1/2"]
[ECO "D58"]
[WhiteElo "1759"]
[BlackElo "2287"]
[PlyCount "152"]
[EventDate "2022.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 h6 6. Bh4 0-0 7. e3 b6 8. Be2 Bb7 9. 0-0 Nbd7 10. Bg3 c5 11. cxd5 exd5 12. Qa4 a6 13. dxc5 Nxc5 14. Qd1 b5 15. a3 Qb6 16. Nd4 Rfe8 17. Nf5 Bf8 18. Rc1 g6 19. Nd4 Bg7 20. b4 Ncd7 21. Qb3 Ne5 22. Bxe5 Rxe5 23. Rfd1 Rd8 24. a4 bxa4 25. Nxa4 Qd6 26. Nc5 Ba8 27. Ra1 Ne4 28. Rxa6 Qe7 29. Rda1 Nxf2 30. Rxa8 Rxe3 31. Qxd5 Rxa8 32. Rxa8+ Kh7 33. Qd8 Qxd8 34. Rxd8 Bxd4 35. Rxd4 Rxe2 36. Rf4 Nd1 37. Rxf7+ Kg8 38. Rf1 Ne3 39. Rb1 Rxg2+ 40. Kh1 Rc2 41. Nd3 Nc4 42. b5 Rd2 43. Nb4 Ne5 44. Rb3 Nc4 45. Na6 Nb6 46. Nc5 Kg7 47. Kg1 Rd5 48. Nd3 g5 49. Kf2 Kf6 50. Ke3 Kf5 51. Rb4 Rd8 52. Kd2 h5 53. Ke2 h4 54. h3 Re8+ 55. Kf3 Rd8 56. Rb3 Rd4 57. Ke3 Re4+ 58. Kf3 Nc4 59. Kf2 Re6 60. Rb4 Nb6 61. Kf3 Rd6 62. Nf2 Rd2 63. Ke3 Ra2 64. Rb3 Rc2 65. Ng4 Rc5 66. Kf3 Ke6 67. Ke4 Rc4+ 68. Kd3 Rf4 69. Rc3 Rf3+ 70. Kc2 Rxc3+ 71. Kxc3 Kd5 72. Nf2 Kc5 73. Ne4+ Kxb5 74. Nxg5 Nd5+ 75. Kd4 Nf4 76. Ke5 Nxh3 1/2-1/2

[Event "Pan American-ch Seniors 65"]
[Site "Florianopolis"]
[Date "2022.06.26"]
[Round "9"]
[White "Ramos, Angelo Bil"]
[Black "Shaffer, Alexander"]
[Result "1/2-1/2"]
[ECO "E01"]
[WhiteElo "1983"]
[BlackElo "1781"]
[PlyCount "66"]
[EventDate "2022.06.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 c5 5. Bg2 Nc6 6. 0-0 cxd4 7. Nxd4 Bc5 8. Nb3 Be7 9. N1d2 0-0 10. a3 a5 11. cxd5 exd5 12. Nf3 Be6 13. Nbd4 Qd7 14. b3 Ne4 15. Bb2 Bf6 16. Rc1 Rac8 17. Qd3 Bh3 18. Rfd1 Bxg2 19. Kxg2 Rfe8 20. e3 Qg4 21. Ng1 Qd7 22. Ba1 Ne5 23. Qb5 Qxb5 24. Nxb5 Rxc1 25. Rxc1 Nd3 26. Rb1 Bxa1 27. Rxa1 Ndxf2 28. Nc7 Rc8 29. Nxd5 Rc2 30. Kf3 Nd2+ 31. Kf4 Nd3+ 32. Kf5 Nxb3 33. Rd1 Nbc5 1/2-1/2

[Event "Pan American-ch Seniors 65"]
[Site "Florianopolis"]
[Date "2022.06.25"]
[Round "8"]
[White "Shaffer, Alexander"]
[Black "Farias, Sergio Luiz Cardoso"]
[Result "1-0"]
[ECO "E14"]
[WhiteElo "1781"]
[BlackElo "1471"]
[PlyCount "65"]
[EventDate "2022.06.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 b6 3. c4 Bb7 4. e3 e6 5. Bd3 d6 6. 0-0 Nbd7 7. Nc3 Nh5 8. e4 g6 9. Bg5 Be7 10. Bh6 Bf8 11. Qd2 Ndf6 12. h3 Qe7 13. g4 Ng7 14. Bg5 h6 15. Bxh6 Ng8 16. Bg5 Qd7 17. Kg2 Be7 18. Bxe7 Nxe7 19. Qf4 f5 20. exf5 0-0-0 21. f6 Rdf8 22. fxg7 Rxf4 23. gxh8Q+ Qd8 24. Qxd8+ Kxd8 25. d5 exd5 26. Kg3 Rf6 27. Nxd5 Nxd5 28. cxd5 Bxd5 29. Ng5 c5 30. f4 c4 31. Be4 Bg8 32. Rfd1 Kc7 33. Bd5 1-0

[Event "Pan American-ch Seniors 65"]
[Site "Florianopolis"]
[Date "2022.06.25"]
[Round "7"]
[White "Shaffer, Alexander"]
[Black "Ferreira, Jose Carlos"]
[Result "1-0"]
[ECO "D53"]
[WhiteElo "1781"]
[BlackElo "1683"]
[PlyCount "89"]
[EventDate "2022.06.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 c6 6. e3 Nbd7 7. Rc1 a6 8. cxd5 exd5 9. Bd3 b6 10. Bf4 0-0 11. h3 Re8 12. 0-0 Nf8 13. Ne5 Ne6 14. Bh2 Ng5 15. Bb1 Nge4 16. f3 Nd6 17. e4 Nc4 18. Nxc4 dxc4 19. d5 Bd6 20. Qd4 Bxh2+ 21. Kxh2 Qd6+ 22. f4 Qd8 23. Qxc4 cxd5 24. exd5 b5 25. Qd4 Qd6 26. a3 Bb7 27. Rcd1 Rac8 28. Qd3 Rcd8 29. g3 Re7 30. Rde1 Rxe1 31. Rxe1 g6 32. Rd1 Bc8 33. Qd4 Bb7 34. Ne4 Nxe4 35. Bxe4 Rc8 36. Rd2 Rc4 37. Qd3 Bc8 38. Rc2 Qc5 39. Rxc4 bxc4 40. Qd2 Qd6 41. Qd4 Bd7 42. Qxc4 Bb5 43. Qd4 f5 44. Bg2 h5 45. h4 1-0

[Event "Pan American-ch Seniors 65"]
[Site "Florianopolis"]
[Date "2022.06.24"]
[Round "6"]
[White "Aragao Neto, Joao Batista"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "E61"]
[WhiteElo "1605"]
[BlackElo "1781"]
[PlyCount "71"]
[EventDate "2022.06.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 g6 3. Nf3 Bg7 4. h3 0-0 5. e3 d6 6. Be2 c5 7. c4 b6 8. Nc3 Nbd7 9. 0-0 cxd4 10. exd4 Bb7 11. Qd2 Rc8 12. Rad1 Bxf3 13. gxf3 Nh5 14. Bh2 e5 15. dxe5 Nxe5 16. Qxd6 Qxd6 17. Rxd6 Nxc4 18. Rd7 Nxb2 19. Nd5 Rfd8 20. Ne7+ Kh8 21. Rxa7 Rc2 22. Bb5 Bf6 23. Nc6 Rdd2 24. Ne5 Bxe5 25. Bxe5+ f6 26. Bh2 Nd1 27. Re1 Rc8 28. Ree7 Nxf2 29. Bf1 Nd1 30. Bc4 Ng7 31. Bb3 Ne3 32. Rec7 Re8 33. Rxg7 Nd5 34. Rxh7+ Kg8 35. Rag7+ Kf8 36. Bd6+ 1-0

[Event "Pan American-ch Seniors 65"]
[Site "Florianopolis"]
[Date "2022.06.23"]
[Round "4"]
[White "Brito, Vicente de Paulo Al"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "B27"]
[WhiteElo "1793"]
[BlackElo "1781"]
[PlyCount "65"]
[EventDate "2022.06.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 g6 4. cxd4 d5 5. exd5 Nf6 6. Nf3 Bg7 7. Bb5+ Nbd7 8. Nc3 0-0 9. Bxd7 Nxd7 10. 0-0 Nb6 11. Qb3 Bf5 12. Re1 Rc8 13. a4 a5 14. Qb5 Qd6 15. Qxa5 Rc4 16. Nb5 Qd8 17. b3 Rc8 18. d6 exd6 19. Ba3 Ra8 20. Qb4 d5 21. Qd2 Be4 22. Bxf8 Qxf8 23. Ne5 Bh6 24. Qe2 Rc8 25. Nd3 Nd7 26. Ra2 Nf6 27. Rc2 Nh5 28. Rxc8 Qxc8 29. Nd6 Qd8 30. Nxe4 dxe4 31. Nc5 Qf6 32. Qxe4 Nf4 33. Nd7 1-0

[Event "Pan American-ch Seniors 65"]
[Site "Florianopolis"]
[Date "2022.06.23"]
[Round "5"]
[White "Shaffer, Alexander"]
[Black "Born, Ary"]
[Result "1-0"]
[ECO "D31"]
[WhiteElo "1781"]
[BlackElo "1246"]
[PlyCount "35"]
[EventDate "2022.06.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 e6 2. Nf3 d5 3. c4 c6 4. Nc3 h6 5. e4 Bd6 6. exd5 exd5 7. cxd5 cxd5 8. Bb5+ Nd7 9. Qe2+ Ne7 10. Nxd5 Qa5+ 11. Bd2 Qd8 12. 0-0 a6 13. Nxe7 axb5 14. Nc6+ Kf8 15. Nxd8 Nf6 16. Ne5 Bg4 17. Nxg4 h5 18. Nxf6 1-0

[Event "Pan American-ch Seniors 65"]
[Site "Florianopolis"]
[Date "2022.06.22"]
[Round "3"]
[White "Shaffer, Alexander"]
[Black "Tobar Salas, Juan Carlos"]
[Result "1-0"]
[ECO "B08"]
[WhiteElo "1781"]
[BlackElo "1347"]
[PlyCount "43"]
[EventDate "2022.06.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 g6 2. e4 Bg7 3. Nc3 d6 4. Nf3 Nf6 5. Be2 0-0 6. 0-0 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. Rad1 c6 11. Nxe5 Rxe5 12. Rd8+ Re8 13. Bxf6 Rxd8 14. Bxd8 Be6 15. Rd1 Bxc3 16. bxc3 Bxa2 17. c4 Na6 18. Ba5 b5 19. cxb5 Nc5 20. bxc6 Nxe4 21. c7 Kg7 22. Rd8 1-0

[Event "Pan American-ch Seniors 65"]
[Site "Florianopolis"]
[Date "2022.06.21"]
[Round "2"]
[White "De Oliveira, Francemir Barra"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "1584"]
[BlackElo "1781"]
[PlyCount "69"]
[EventDate "2022.06.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. a3 cxd4 6. cxd4 Bd7 7. f4 Nge7 8. Nf3 Nf5 9. b4 Qb6 10. Bb2 Rc8 11. g4 Ne3 12. Qd2 Nxg4 13. h3 Nh6 14. Nc3 Nf5 15. Ne2 a5 16. Kf2 axb4 17. Kg2 bxa3 18. Bxa3 Bxa3 19. Rxa3 0-0 20. Kh2 Ra8 21. Rd3 Na5 22. Rg1 Nc4 23. Qe1 Na3 24. Rxa3 Rxa3 25. Qf2 Rc8 26. Qg2 Ra2 27. Qg4 Qd8 28. Kh1 Bb5 29. Ng5 Bxe2 30. Bxe2 Qf8 31. Bd3 Rd2 32. Bxf5 exf5 33. Qxf5 g6 34. Qf6 h6 35. Ne4 1-0

[Event "Pan American-ch Seniors 65"]
[Site "Florianopolis"]
[Date "2022.06.21"]
[Round "1"]
[White "Shaffer, Alexander"]
[Black "Leskovar, Mario Leopoldo"]
[Result "0-1"]
[ECO "A41"]
[WhiteElo "1781"]
[BlackElo "2199"]
[PlyCount "110"]
[EventDate "2022.06.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 d6 2. Nf3 Bg4 3. e4 Nf6 4. Nc3 e6 5. Be2 Be7 6. 0-0 0-0 7. Be3 d5 8. e5 Nfd7 9. Nd2 Bxe2 10. Nxe2 c5 11. c3 Nc6 12. f4 cxd4 13. Nxd4 Nxd4 14. Bxd4 f5 15. exf6 Bxf6 16. Nf3 Qc7 17. Bxf6 Rxf6 18. g3 Rc8 19. Qd4 Qb6 20. Qxb6 Nxb6 21. Rae1 Nc4 22. Re2 h6 23. Kg2 Nd6 24. Rfe1 Ne4 25. Ne5 Rc7 26. h4 b5 27. a3 Rf8 28. Nf3 Kf7 29. Nd2 Nxd2 30. Rxd2 Rd8 31. Re5 Rcd7 32. Rd4 Kf6 33. Kf3 a6 34. h5 Rc8 35. Ke3 Rc4 36. Kd3 Rdc7 37. g4 Ra4 38. Re2 Rxd4+ 39. cxd4 Rc1 40. Ke3 a5 41. Rg2 Rh1 42. Kf3 a4 43. Kf2 Rc1 44. Kf3 Rc4 45. Ke3 b4 46. axb4 Rxb4 47. Rc2 Rb3+ 48. Rc3 Rxb2 49. Ra3 Rb3+ 50. Rxb3 axb3 51. Kd3 g6 52. hxg6 Kxg6 53. Kc3 h5 54. gxh5+ Kxh5 55. Kxb3 Kg4 0-1

[Event "Sitges Sunway op 8th"]
[Site "Sitges"]
[Date "2021.12.14"]
[Round "2"]
[White "Lever, Erwan"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "E00"]
[WhiteElo "2268"]
[BlackElo "1702"]
[PlyCount "83"]
[EventDate "2021.12.13"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "ESP"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. d4 e6 2. c4 Nf6 3. g3 Bb4+ 4. Bd2 a5 5. Bg2 0-0 6. e3 d5 7. Qc2 Nbd7 8. Ne2 c6 9. 0-0 Qe7 10. f4 b5 11. c5 Bxd2 12. Nxd2 Ba6 13. Rfe1 Ng4 14. Nc1 f5 15. Nf3 Ngf6 16. Nd3 Ne4 17. Nde5 Nxe5 18. Nxe5 Qc7 19. Bxe4 fxe4 20. a3 Bc8 21. b4 axb4 22. axb4 Bd7 23. Qb2 Qb7 24. Rec1 Rfb8 25. Rc3 Be8 26. Rca3 Kf8 27. Ra5 Ke7 28. R1a3 Kf6 29. Qa2 Rxa5 30. Rxa5 Qc7 31. g4 Ke7 32. Qf2 Kf8 33. Ra6 Kg8 34. Kg2 Qc8 35. Qa2 Qc7 36. Kg3 Rb7 37. h3 Rb8 38. h4 Rb7 39. h5 Rb8 40. Rb6 Qc8 41. Qa7 Ra8 42. Qe7 1-0

[Event "San Pedro de Macoris zt"]
[Site "San Pedro de Macoris"]
[Date "2021.11.08"]
[Round "1"]
[White "Rodriguez Santiago, Jaime"]
[Black "Shaffer, Alexander"]
[Result "1/2-1/2"]
[ECO "A36"]
[WhiteElo "2064"]
[BlackElo "1678"]
[PlyCount "37"]
[EventDate "2021.11.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "DOM"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. c4 c5 2. Nc3 e6 3. e4 Nc6 4. g3 g6 5. Bg2 Bg7 6. Nge2 Nge7 7. d3 0-0 8. Be3 Nd4 9. 0-0 Nec6 10. Qd2 d6 11. Rab1 b6 12. Bh6 Rb8 13. Bxg7 Kxg7 14. Nxd4 Nxd4 15. b4 b5 16. a3 Bd7 17. Ne2 Qf6 18. Nxd4 Qxd4 19. Qb2 1/2-1/2

[Event "Ibague op"]
[Site "Ibague"]
[Date "2021.10.24"]
[Round "9"]
[White "Sanchez Aragon, Michael Alejandro"]
[Black "Shaffer, Alexander"]
[Result "1/2-1/2"]
[ECO "B46"]
[WhiteElo "1288"]
[BlackElo "1774"]
[PlyCount "47"]
[EventDate "2021.10.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Bd3 Nc6 6. Be3 a6 7. Nc3 Bb4 8. Qd2 Qa5 9. Nb3 Bxc3 10. Nxa5 Bxd2+ 11. Bxd2 Nxa5 12. Bxa5 d5 13. exd5 Nxd5 14. 0-0 0-0 15. Bd2 Bd7 16. c4 Nf6 17. Bg5 Bc6 18. Bxf6 gxf6 19. Rad1 Rfd8 20. Bc2 f5 21. Rxd8+ Rxd8 22. Rd1 Rxd1+ 23. Bxd1 Kf8 24. f4 1/2-1/2

[Event "Ibague op"]
[Site "Ibague"]
[Date "2021.10.22"]
[Round "5"]
[White "Carrillo Riano, Karen Sofia"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "B88"]
[WhiteElo "1409"]
[BlackElo "1774"]
[PlyCount "48"]
[EventDate "2021.10.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. 0-0 Be7 8. Kh1 Nxd4 9. Qxd4 a6 10. f3 0-0 11. Be3 b5 12. Be2 e5 13. Qd2 Be6 14. f4 b4 15. Nd5 Nxe4 16. Nxe7+ Qxe7 17. Qxb4 f5 18. fxe5 Qh4 19. Qe1 Qxe1 20. Rfxe1 dxe5 21. Kg1 Nf6 22. a3 Rfc8 23. Rac1 Nd5 24. Bd2 e4 1-0

[Event "Ibague op"]
[Site "Ibague"]
[Date "2021.10.22"]
[Round "6"]
[White "Shaffer, Alexander"]
[Black "Vargas Diaz, Juan David"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1774"]
[BlackElo "1367"]
[PlyCount "59"]
[EventDate "2021.10.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 c5 3. c3 Nf6 4. dxc5 Nc6 5. Nbd2 e5 6. b4 a6 7. Nb3 Be7 8. e3 0-0 9. Be2 e4 10. Nfd4 Ne5 11. 0-0 Bg4 12. Bxg4 Nfxg4 13. h3 Nh6 14. Qh5 Nd3 15. Nf5 Nxf5 16. Qxf5 Bf6 17. Nd4 a5 18. Bd2 axb4 19. cxb4 g6 20. Qg4 h5 21. Qe2 Bh4 22. f4 exf3 23. Qxd3 fxg2 24. Rf3 Ra6 25. Kxg2 Qg5+ 26. Kh1 Bg3 27. Bc3 Rfa8 28. Ne2 h4 29. Qd4 f5 30. Qg7# 1-0

[Event "Ibague op"]
[Site "Ibague"]
[Date "2021.10.21"]
[Round "3"]
[White "Quevedo Bonilla, Paula Thaliana"]
[Black "Shaffer, Alexander"]
[Result "0-1"]
[ECO "B45"]
[WhiteElo "1320"]
[BlackElo "1774"]
[PlyCount "50"]
[EventDate "2021.10.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 Nf6 6. N1c3 Bb4 7. Nd6+ Ke7 8. Nc4 Nxe4 9. Bd2 Bxc3 10. Bxc3 d5 11. Na3 Nxc3 12. bxc3 Qa5 13. Nb1 Rd8 14. Bd3 d4 15. Qd2 Qe5+ 16. Qe2 dxc3 17. 0-0 Qxe2 18. Bxe2 Nb4 19. Nxc3 Nxc2 20. Rac1 Nd4 21. Bc4 Bd7 22. Kh1 Bc6 23. Rfe1 Nf5 24. Rc2 Rd7 25. h3 Rad8 0-1

[Event "Ibague op"]
[Site "Ibague"]
[Date "2021.10.20"]
[Round "2"]
[White "Shaffer, Alexander"]
[Black "Vargas Benavides, Mauricio"]
[Result "0-1"]
[ECO "D66"]
[WhiteElo "1774"]
[BlackElo "2101"]
[PlyCount "106"]
[EventDate "2021.10.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 Be7 6. e3 h6 7. Bh4 Nbd7 8. Bd3 0-0 9. Rc1 dxc4 10. Bxc4 Nd5 11. Bxe7 Qxe7 12. 0-0 N5b6 13. Bb3 e5 14. d5 cxd5 15. Nxd5 Nxd5 16. Qxd5 Re8 17. Rc7 a5 18. a4 Ra6 19. Rd1 Rb6 20. e4 Rf8 21. Rdc1 Rc6 22. R1xc6 bxc6 23. Qxc6 Qd8 24. Bd5 Nb8 25. Qc3 Na6 26. Ra7 Nb4 27. Qxe5 Be6 28. Ra8 Qd7 29. Rxf8+ Kxf8 30. Qb8+ Ke7 31. Qb7 Nxd5 32. Qxd7+ Kxd7 33. exd5 Bxd5 34. Nd4 g6 35. Kf1 Kd6 36. Ke2 Kc5 37. Kd3 Bxg2 38. Kc3 Bd5 39. Nc2 Bc6 40. b3 Bd7 41. Nd4 g5 42. Nf3 f5 43. Ne5 Be6 44. Nd3+ Kd5 45. b4 axb4+ 46. Kxb4 Bc8 47. Nc5 f4 48. a5 h5 49. Nd3 Ke4 50. Ne1 Bb7 51. Kc3 Kf5 52. h3 g4 53. hxg4+ Kxg4 0-1

[Event "Manizales Las Americas op-A"]
[Site "Manizales"]
[Date "2021.10.18"]
[Round "9"]
[White "Lopez Rayo, Isabella"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "B63"]
[WhiteElo "1748"]
[BlackElo "1774"]
[PlyCount "63"]
[EventDate "2021.10.14"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. 0-0-0 0-0 9. h4 Bd7 10. Ndb5 d5 11. exd5 exd5 12. Nxd5 Nxd5 13. Qxd5 Be6 14. Qe4 Bxg5+ 15. f4 Bxf4+ 16. Qxf4 Qa5 17. a3 Rad8 18. Be2 Rxd1+ 19. Rxd1 Rd8 20. Bd3 h5 21. Nc3 g6 22. Ne4 Qe5 23. Qh6 Qg7 24. Qg5 f5 25. Nc5 Qf7 26. Re1 Re8 27. Nxb7 Bc8 28. Rf1 Bxb7 29. Rxf5 Re5 30. Rxe5 Nxe5 31. Qxe5 Bxg2 32. Qg5 1-0

[Event "Manizales Las Americas op-A"]
[Site "Manizales"]
[Date "2021.10.18"]
[Round "10"]
[White "Ordonez Gonzalez, Gabriel"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "A34"]
[WhiteElo "1971"]
[BlackElo "1774"]
[PlyCount "81"]
[EventDate "2021.10.14"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. c4 e6 2. e3 c5 3. Nc3 Nc6 4. g3 d5 5. cxd5 exd5 6. d4 Nf6 7. Bg2 cxd4 8. exd4 Be7 9. Nf3 0-0 10. 0-0 Re8 11. h3 h6 12. Kh2 Bf8 13. Bf4 a6 14. Re1 Rxe1 15. Qxe1 Be6 16. Rd1 Qb6 17. Ne5 Rc8 18. Nxc6 Rxc6 19. Bc1 Rc4 20. Qe3 Bb4 21. Bf1 Rc8 22. Bd3 Bxc3 23. bxc3 Qa5 24. Bd2 Qxa2 25. g4 Qa3 26. g5 Qd6+ 27. Kh1 hxg5 28. Qxg5 Ne4 29. Bxe4 dxe4 30. Rg1 Qf8 31. Qe5 e3 32. fxe3 Bxh3 33. e4 Rc6 34. Qh5 Qc8 35. Rg3 Bf1 36. Rf3 g6 37. Qh2 Bc4 38. Rh3 Qg4 39. Rh8+ Kg7 40. Rh7+ Kf6 41. Qe5# 1-0

[Event "Manizales Las Americas op-A"]
[Site "Manizales"]
[Date "2021.10.17"]
[Round "8"]
[White "Shaffer, Alexander"]
[Black "Arango, Santiago"]
[Result "0-1"]
[ECO "E11"]
[WhiteElo "1774"]
[BlackElo "2023"]
[PlyCount "72"]
[EventDate "2021.10.14"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 0-0 7. 0-0 dxc4 8. Qa4 Ne4 9. Be3 Nd6 10. Na3 b5 11. Qc2 Bb7 12. b3 Be4 13. Qc1 cxb3 14. axb3 Qc8 15. Ne5 Bxg2 16. Kxg2 Qb7+ 17. f3 Rd8 18. Qc2 Nf5 19. Qd3 c5 20. Rfd1 Nd7 21. Nxd7 Rxd7 22. Bf2 a6 23. e3 cxd4 24. e4 Nh6 25. Be3 Rc8 26. Bxh6 gxh6 27. Qd2 Bg5 28. Qb4 d3 29. h4 Bf6 30. Rac1 Be7 31. Qa5 Rd4 32. Nb1 Rc2+ 33. Kh3 Qc8 34. Qe1 Bb4 35. Qe3 Kh8 36. Qxd4+ e5+ 0-1

[Event "Manizales Las Americas op-A"]
[Site "Manizales"]
[Date "2021.10.17"]
[Round "7"]
[White "Shaffer, Alexander"]
[Black "Soto, Cristian Camilo"]
[Result "0-1"]
[ECO "E50"]
[WhiteElo "1774"]
[BlackElo "2078"]
[PlyCount "100"]
[EventDate "2021.10.14"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 Bb4+ 4. Nc3 c5 5. e3 0-0 6. Bd3 b6 7. 0-0 Bxc3 8. bxc3 d6 9. e4 Nc6 10. Bg5 e5 11. d5 Na5 12. Nh4 h6 13. Bxf6 Qxf6 14. g3 Bh3 15. Ng2 g5 16. Qh5 Bxg2 17. Kxg2 Qg6 18. Qg4 h5 19. Qf5 Qxf5 20. exf5 e4 21. Bxe4 Nxc4 22. Rfe1 Kg7 23. Bc2 Kf6 24. h3 Rfe8 25. g4 hxg4 26. hxg4 Rh8 27. Re4 Ne5 28. Rh1 Rxh1 29. Kxh1 b5 30. Kg2 c4 31. Kg3 Rg8 32. a4 a6 33. axb5 axb5 34. f4 gxf4+ 35. Rxf4 Kg5 36. f6 Nd3 37. Rf5+ Kg6 38. Rf3 Ra8 39. Bxd3+ cxd3 40. Kf4 Ra4+ 41. Ke3 Rxg4 42. Kxd3 Rg5 43. Ke4 Re5+ 44. Kd4 Rf5 45. Rg3+ Kxf6 46. Rg4 Rf1 47. Rg8 Rf4+ 48. Ke3 Rc4 49. Kd3 Ke5 50. Rg5+ f5 0-1

[Event "Manizales Las Americas op-A"]
[Site "Manizales"]
[Date "2021.10.16"]
[Round "6"]
[White "Geurts, Harrie Tulio"]
[Black "Shaffer, Alexander"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1803"]
[BlackElo "1774"]
[PlyCount "132"]
[EventDate "2021.10.14"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. a3 c5 4. e3 cxd4 5. exd4 d5 6. Nf3 Be7 7. Nc3 0-0 8. cxd5 Nxd5 9. Be2 Nc6 10. 0-0 b6 11. Qb3 Na5 12. Qc2 Bb7 13. Bd2 Rc8 14. Rac1 Nf6 15. Be3 Nc4 16. Nd2 Nxe3 17. fxe3 Nd5 18. Qd3 Bg5 19. Nxd5 Bxd5 20. Bf3 Qd7 21. Be4 f5 22. Bxd5 Qxd5 23. Nf3 Bf6 24. Qa6 Rxc1 25. Rxc1 Qb3 26. Qe2 g6 27. Rc3 Qd5 28. Qc2 Rf7 29. Rc8+ Kg7 30. Rc7 Rd7 31. Kf2 g5 32. Rxd7+ Qxd7 33. Qc4 g4 34. Ne1 f4 35. Nc2 fxe3+ 36. Kxe3 Qb7 37. Qe2 Bg5+ 38. Kf2 Qf7+ 39. Ke1 h5 40. Qe5+ Kg6 41. Nb4 Bf4 42. Qe4+ Qf5 43. Qxf5+ Kxf5 44. g3 a5 45. Nc2 Bc1 46. b3 Ke4 47. Ke2 Bb2 48. Ne3 Bxd4 49. Nc4 Bc5 50. b4 axb4 51. axb4 Bd4 52. Nd2+ Kd5 53. Kd3 Bg1 54. Nc4 b5 55. Na3 Kc6 56. Ke4 Bxh2 57. Kf4 e5+ 58. Kg5 Bxg3 59. Kxh5 Be1 60. Kxg4 Bxb4 61. Nc2 Bc3 62. Kf5 Kd5 63. Ne3+ Kd4 64. Ng4 e4 65. Kf4 Bd2+ 66. Kg3 b4 0-1

[Event "Manizales Las Americas op-A"]
[Site "Manizales"]
[Date "2021.10.16"]
[Round "5"]
[White "Shaffer, Alexander"]
[Black "Manrique Ochoa, Fernando"]
[Result "0-1"]
[ECO "C90"]
[WhiteElo "1774"]
[BlackElo "2056"]
[PlyCount "74"]
[EventDate "2021.10.14"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. d3 d6 9. c3 Na5 10. Bc2 c5 11. Nbd2 Nc6 12. Nf1 h6 13. h3 Be6 14. Ng3 Re8 15. a3 Qc7 16. b4 d5 17. Bb2 Rad8 18. Qe2 dxe4 19. dxe4 Rd7 20. Red1 Red8 21. Rxd7 Rxd7 22. Rd1 Bc4 23. Rxd7 Nxd7 24. Qe3 a5 25. Nf5 Bf8 26. Nd2 Be6 27. bxc5 Bxc5 28. Qg3 Bxf5 29. exf5 Nf6 30. Ne4 Nxe4 31. Bxe4 Nd8 32. c4 f6 33. cxb5 Qd6 34. Qb3+ Kh7 35. a4 Qd2 36. Qc2 Qe1+ 37. Kh2 Bxf2 0-1

[Event "Manizales Las Americas op-A"]
[Site "Manizales"]
[Date "2021.10.15"]
[Round "3"]
[White "Lopez Idarraga, Daniel Eduardo"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "E46"]
[WhiteElo "2032"]
[BlackElo "1774"]
[PlyCount "53"]
[EventDate "2021.10.14"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nge2 d5 6. a3 Be7 7. cxd5 exd5 8. g3 a5 9. Bg2 c6 10. 0-0 Na6 11. f3 Nc7 12. e4 dxe4 13. fxe4 Bg4 14. h3 Bh5 15. Kh1 Qd7 16. g4 Bg6 17. Ng3 Rad8 18. Be3 Ne6 19. Nf5 Bxf5 20. gxf5 Nxd4 21. e5 Ne8 22. Qg4 g6 23. Rad1 c5 24. f6 Qxg4 25. hxg4 Bxf6 26. exf6 b6 27. Bh6 1-0

[Event "Manizales Las Americas op-A"]
[Site "Manizales"]
[Date "2021.10.15"]
[Round "4"]
[White "Shaffer, Alexander"]
[Black "Ocampo Betancur, Cristina Angela"]
[Result "0-1"]
[ECO "D40"]
[WhiteElo "1774"]
[BlackElo "1998"]
[PlyCount "50"]
[EventDate "2021.10.14"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 c5 5. e3 Nc6 6. a3 a6 7. dxc5 Bxc5 8. b4 Bb6 9. Bb2 0-0 10. cxd5 exd5 11. Be2 d4 12. exd4 Nxd4 13. Nxd4 Bxd4 14. 0-0 Bf5 15. Bf3 Rc8 16. Rc1 Qd7 17. Qd2 Rfd8 18. Rfd1 Ng4 19. Bxg4 Bxg4 20. Re1 Qf5 21. h3 Bxh3 22. gxh3 Bxc3 23. Re8+ Rxe8 24. Rxc3 Rxc3 25. Qxc3 Qg6+ 0-1

[Event "Manizales Las Americas op-A"]
[Site "Manizales"]
[Date "2021.10.14"]
[Round "1"]
[White "Shaffer, Alexander"]
[Black "Ruiz Aguilar, Pablo Alexander"]
[Result "0-1"]
[ECO "D69"]
[WhiteElo "1774"]
[BlackElo "2172"]
[PlyCount "100"]
[EventDate "2021.10.14"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. Bg5 Be7 6. e3 Nbd7 7. Rc1 0-0 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. 0-0 Nxc3 12. Rxc3 e5 13. dxe5 Nxe5 14. Nxe5 Qxe5 15. f4 Qf6 16. e4 Be6 17. e5 Qe7 18. Qe2 Rfe8 19. a3 Rad8 20. Bxe6 fxe6 21. Qf2 a6 22. Qb6 Rd7 23. b4 Red8 24. a4 Rd2 25. Rb3 Ra2 26. b5 Rdd2 27. Rg3 Rab2 28. Qa5 Qc5+ 29. Kh1 cxb5 30. axb5 Qxb5 31. Qxb5 Rxb5 32. h4 Rbb2 33. Rc1 Rbc2 34. Rb1 Rd7 35. Rb6 Rf2 36. Rg4 h5 37. Rg6 Rxf4 38. Rgxe6 Rd1+ 39. Kh2 Rxh4+ 40. Kg3 Rg4+ 41. Kf3 Rd3+ 42. Ke2 Rd7 43. Red6 Re7 44. e6 g6 45. Kf3 Rc4 46. Rd7 Rc7 47. Rd8+ Kg7 48. Ke4 Rc2 49. Rd7 Re2+ 50. Kd5 Rd2+ 0-1

[Event "Manizales Las Americas op-A"]
[Site "Manizales"]
[Date "2021.10.14"]
[Round "2"]
[White "Tirado Veliz, Henry Jose"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "C26"]
[WhiteElo "2101"]
[BlackElo "1774"]
[PlyCount "117"]
[EventDate "2021.10.14"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. g3 d5 4. exd5 Nxd5 5. Bg2 Nxc3 6. bxc3 Bd6 7. Ne2 0-0 8. 0-0 Nc6 9. Rb1 Na5 10. d3 Rb8 11. Be3 b6 12. c4 Bb7 13. Nc3 Bxg2 14. Kxg2 Nc6 15. Nd5 Nd4 16. c3 Nf5 17. Qg4 Nxe3+ 18. fxe3 f6 19. Rbd1 c6 20. Qe6+ Kh8 21. Nb4 Re8 22. Qf5 Bxb4 23. cxb4 Qe7 24. Rb1 Qe6 25. Qxe6 Rxe6 26. Rfd1 Rd8 27. Kf2 Red6 28. Ke2 Kg8 29. Rd2 Kf7 30. Rbd1 Ke6 31. d4 e4 32. Rc2 c5 33. bxc5 bxc5 34. d5+ Ke5 35. Rb2 Rb6 36. Rxb6 axb6 37. Rb1 Rd6 38. Kd2 f5 39. Kc3 g5 40. a4 f4 41. gxf4+ gxf4 42. exf4+ Kxf4 43. Rf1+ Ke3 44. Re1+ Kf3 45. Kd2 Rg6 46. Rf1+ Kg2 47. Rf4 Kxh2 48. Rxe4 Kg3 49. Re6 Rg4 50. Kc3 h5 51. d6 h4 52. d7 Rd4 53. Re3+ Kg2 54. Rd3 Rxd7 55. Rxd7 h3 56. Rg7+ Kf2 57. Rh7 Kg2 58. a5 bxa5 59. Kb3 1-0

[Event "Medellin Raza op"]
[Site "Medellin"]
[Date "2021.10.10"]
[Round "8"]
[White "Shaffer, Alexander"]
[Black "Leal, Dayana Vanessa"]
[Result "0-1"]
[ECO "E94"]
[WhiteElo "1805"]
[BlackElo "1600"]
[PlyCount "62"]
[EventDate "2021.10.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 0-0 5. e4 d6 6. Be2 Nbd7 7. 0-0 e5 8. d5 Nc5 9. Nd2 a5 10. Rb1 Nfd7 11. b3 f5 12. a3 Nf6 13. f3 f4 14. b4 Na6 15. g4 fxg3 16. hxg3 Nh5 17. Kg2 Qg5 18. Qe1 Nf4+ 19. Kh2 Bh6 20. Nb3 Qh5+ 21. Kg1 Nh3+ 22. Kg2 Bxc1 23. Rxc1 Ng5 24. Rh1 Bh3+ 25. Kg1 Nxf3+ 26. Bxf3 Rxf3 27. Nxa5 Qg4 28. Kh2 Raf8 29. Rc2 Bf1 30. Rxf1 Rxf1 31. Qe3 Qh5+ 0-1

[Event "Medellin Raza op"]
[Site "Medellin"]
[Date "2021.10.09"]
[Round "7"]
[White "Ortiz Monsalve, Sebastian"]
[Black "Shaffer, Alexander"]
[Result "1/2-1/2"]
[ECO "B40"]
[WhiteElo "1439"]
[BlackElo "1805"]
[PlyCount "65"]
[EventDate "2021.10.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Bd3 Nc6 6. Nxc6 bxc6 7. Nc3 d5 8. 0-0 Be7 9. b3 0-0 10. e5 Nd7 11. f4 f5 12. exf6 Bxf6 13. Bb2 e5 14. fxe5 Nxe5 15. Be2 a5 16. Na4 Nd7 17. Bxf6 Nxf6 18. c4 Ba6 19. cxd5 Bxe2 20. Qxe2 cxd5 21. Qe6+ Kh8 22. Rac1 Rc8 23. Rxc8 Qxc8 24. Qd6 Re8 25. Qb6 Qc2 26. Qxa5 Qxa2 27. Qb5 Qe2 28. Qxe2 Rxe2 29. b4 Kg8 30. Rd1 Kf7 31. Nc3 Rb2 32. Nxd5 Nxd5 33. Rxd5 1/2-1/2

[Event "Medellin Raza op"]
[Site "Medellin"]
[Date "2021.10.09"]
[Round "6"]
[White "Shaffer, Alexander"]
[Black "Chavez Duero, Brayan Steven"]
[Result "0-1"]
[ECO "E14"]
[WhiteElo "1805"]
[BlackElo "1992"]
[PlyCount "88"]
[EventDate "2021.10.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 b6 3. e3 Bb7 4. Bd3 e6 5. 0-0 d5 6. c4 Bd6 7. b3 0-0 8. Bb2 Ne4 9. Nbd2 f5 10. Ne5 Bxe5 11. dxe5 Nxd2 12. Qxd2 dxc4 13. bxc4 Qd7 14. Rfd1 Rd8 15. Qc2 Qc6 16. Bf1 Na6 17. Rxd8+ Rxd8 18. Rd1 Rd7 19. Rxd7 Qxd7 20. Qd3 Qxd3 21. Bxd3 Nb4 22. Bb1 Kf7 23. f4 Ba6 24. Bc3 Nc6 25. Bd3 Ke7 26. Kf2 Kd7 27. Ke2 Nd8 28. Kd2 Nb7 29. Bb4 g6 30. Kc3 c5 31. Ba3 Na5 32. Bc1 Bb7 33. g3 a6 34. Bd2 Be4 35. Bxe4 fxe4 36. g4 b5 37. cxb5 axb5 38. a3 Kc6 39. Bc1 Kd5 40. h4 h5 41. gxh5 gxh5 42. Bd2 Nc6 43. Bc1 Ne7 44. Bd2 Nf5 0-1

[Event "Medellin Raza op"]
[Site "Medellin"]
[Date "2021.10.08"]
[Round "4"]
[White "Sanchez Arroyave, Juan Pablo"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "E18"]
[WhiteElo "1976"]
[BlackElo "1805"]
[PlyCount "119"]
[EventDate "2021.10.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. 0-0 0-0 7. Nc3 Ne4 8. Bd2 Bf6 9. Rc1 c5 10. d5 Nxc3 11. Bxc3 exd5 12. cxd5 d6 13. e4 Re8 14. Re1 Nd7 15. Qd3 Bxc3 16. Qxc3 Qf6 17. Qc2 Re7 18. Nh4 g6 19. Qd2 Rae8 20. Rcd1 Qg7 21. f4 f6 22. Qd3 Bc8 23. Qc4 Nf8 24. Nf3 Bg4 25. h3 Bxf3 26. Bxf3 g5 27. Kf2 gxf4 28. gxf4 Qh6 29. Rg1+ Kh8 30. Rg4 Ng6 31. Qc1 Rg7 32. Rh1 Nh4 33. f5 Qxc1 34. Rxc1 Nxf3 35. Kxf3 Reg8 36. Rxg7 Rxg7 37. a3 b5 38. a4 a6 39. axb5 axb5 40. Ra1 Rd7 41. Ra6 Kg7 42. Rb6 b4 43. Kf4 Kf7 44. b3 Ke7 45. Ra6 Rc7 46. Ke3 c4 47. bxc4 Rxc4 48. Ra7+ Kd8 49. Rxh7 b3 50. Rb7 Rc3+ 51. Kf4 Kc8 52. Rb4 Rxh3 53. Kg4 Re3 54. Kh5 b2 55. Rxb2 Rxe4 56. Kg6 Re5 57. Rb5 Kd8 58. Kxf6 Ke8 59. Ra5 Kd8 60. Kg6 1-0

[Event "Medellin Raza op"]
[Site "Medellin"]
[Date "2021.10.07"]
[Round "2"]
[White "Moscoso Sanchez, Fernando"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "B48"]
[WhiteElo "2138"]
[BlackElo "1805"]
[PlyCount "59"]
[EventDate "2021.10.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Bd3 Nf6 8. 0-0 Be7 9. h3 d6 10. Na4 Nxd4 11. Bxd4 b5 12. Nb6 Rb8 13. Nxc8 Rxc8 14. a4 Rb8 15. axb5 axb5 16. Ra7 Qc6 17. Qe2 d5 18. exd5 Qxd5 19. Be5 Rd8 20. Bxb5+ Kf8 21. Rfa1 Bc5 22. Bxf6 gxf6 23. Bc4 Qg5 24. R7a5 Rg8 25. g4 Rd2 26. Rxc5 Qxc5 27. Qxd2 Qxc4 28. Qh6+ Ke7 29. Ra7+ Kd6 30. Qd2+ 1-0

[Event "Medellin Raza op"]
[Site "Medellin"]
[Date "2021.10.07"]
[Round "3"]
[White "Shaffer, Alexander"]
[Black "Montoya, Mariangel"]
[Result "1-0"]
[ECO "E92"]
[WhiteElo "1805"]
[BlackElo "1280"]
[PlyCount "59"]
[EventDate "2021.10.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 0-0 5. e4 d6 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. 0-0-0 h6 11. Bh4 c6 12. Ne1 Be6 13. f3 a6 14. Nc2 g5 15. Bf2 Bf8 16. h4 g4 17. h5 b5 18. Ne3 gxf3 19. gxf3 bxc4 20. Bxc4 Bc5 21. Bxe6 fxe6 22. Ng4 Be7 23. Nxe5 Nh7 24. Rhg1+ Kf8 25. Ng6+ Kf7 26. Nxe7 Rxe7 27. Be3 Nf6 28. Rd8 Rb7 29. Bxh6 Raa7 30. Rg7# 1-0

[Event "Soacha op-A"]
[Site "Soacha"]
[Date "2021.09.12"]
[Round "9"]
[White "Bejarano Urrego, Dany Andres"]
[Black "Shaffer, Alexander"]
[Result "1/2-1/2"]
[ECO "B40"]
[WhiteElo "1991"]
[BlackElo "1805"]
[PlyCount "78"]
[EventDate "2021.09.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Bd3 Nc6 6. Ne2 d5 7. exd5 exd5 8. 0-0 Be7 9. h3 0-0 10. c3 Re8 11. Be3 Ne5 12. Bb5 Bd7 13. Bxd7 Qxd7 14. Qb3 Nc4 15. Bd4 Ne4 16. Qc2 Bd6 17. b3 Ne5 18. Nd2 Nxd2 19. Qxd2 Nf3+ 20. gxf3 Rxe2 21. Qxe2 Re8 22. Qxe8+ Qxe8 23. Rfe1 Qd8 24. Kf1 h5 25. Be5 Bxe5 26. Rxe5 Qf6 27. Re3 d4 28. cxd4 Qxd4 29. Re8+ Kh7 30. Rae1 Qd3+ 31. Kg2 Qg6+ 32. Kh2 Qf5 33. R1e3 Qf4+ 34. Kg2 Qg5+ 35. Kf1 Qb5+ 36. Re2 Qf5 37. Kg2 Qg5+ 38. Kf1 Qf5 39. Kg2 Qg5+ 1/2-1/2

[Event "Soacha op-A"]
[Site "Soacha"]
[Date "2021.09.12"]
[Round "10"]
[White "Shaffer, Alexander"]
[Black "Ballesteros Diaz, Jefree Daniel"]
[Result "1/2-1/2"]
[ECO "D35"]
[WhiteElo "1805"]
[BlackElo "1615"]
[PlyCount "31"]
[EventDate "2021.09.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. Nc3 Be7 5. Bg5 Nbd7 6. e3 0-0 7. Rc1 h6 8. Bh4 c6 9. Bd3 Ne8 10. Bxe7 Qxe7 11. 0-0 Ndf6 12. a3 a5 13. h3 dxc4 14. Bxc4 Nd6 15. Bd3 Nd7 16. Bb1 1/2-1/2

[Event "Soacha op-A"]
[Site "Soacha"]
[Date "2021.09.11"]
[Round "7"]
[White "Negron Lizarazo, Juan Sebastian"]
[Black "Shaffer, Alexander"]
[Result "1/2-1/2"]
[ECO "B24"]
[WhiteElo "1488"]
[BlackElo "1805"]
[PlyCount "40"]
[EventDate "2021.09.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. g3 Nc6 4. Bg2 g6 5. d3 Bg7 6. f4 Nge7 7. Nf3 0-0 8. Be3 Nd4 9. 0-0 Rb8 10. Rb1 Nec6 11. h3 d5 12. exd5 exd5 13. Nxd5 Be6 14. Nc3 Qd7 15. Ng5 Bf5 16. g4 Rfe8 17. Nge4 Bxe4 18. dxe4 Rbd8 19. Nd5 f5 20. c3 fxe4 1/2-1/2

[Event "Soacha op-A"]
[Site "Soacha"]
[Date "2021.09.11"]
[Round "8"]
[White "Shaffer, Alexander"]
[Black "Tascon, Diego Alejandro"]
[Result "1/2-1/2"]
[ECO "E68"]
[WhiteElo "1805"]
[BlackElo "1067"]
[PlyCount "61"]
[EventDate "2021.09.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 0-0 5. g3 d6 6. Bg2 Nbd7 7. 0-0 e5 8. e4 b6 9. Re1 Ba6 10. b3 Ne8 11. Bb2 Rb8 12. Qd2 f5 13. Rad1 Nef6 14. exf5 gxf5 15. dxe5 dxe5 16. Nxe5 Nxe5 17. Qxd8 Rbxd8 18. Rxd8 Rxd8 19. Rxe5 Ne4 20. Rxe4 fxe4 21. Bxe4 Rd2 22. Ba1 Bc8 23. Kf1 Bg4 24. h3 Bxh3+ 25. Ke1 Rd8 26. Ke2 Kf7 27. Bxh7 Ke6 28. Bb2 Bf5 29. Bxf5+ Kxf5 30. Nd1 Bxb2 31. Nxb2 1/2-1/2

[Event "Soacha op-A"]
[Site "Soacha"]
[Date "2021.09.10"]
[Round "5"]
[White "Obando Guzman, Soren Federico"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "A14"]
[WhiteElo "2056"]
[BlackElo "1805"]
[PlyCount "109"]
[EventDate "2021.09.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. Nf3 c5 2. g3 e6 3. Bg2 d5 4. c4 Nc6 5. 0-0 Nf6 6. b3 Be7 7. Bb2 0-0 8. e3 b6 9. Qe2 Bb7 10. Rd1 Qc7 11. Nc3 Rad8 12. cxd5 Nxd5 13. Rac1 Ndb4 14. d4 cxd4 15. Nb5 Qb8 16. Nfxd4 Nxd4 17. Bxd4 Bxg2 18. Kxg2 a6 19. Na3 b5 20. Nb1 Qb7+ 21. Kg1 Nc6 22. Qf3 Rc8 23. Bb2 Rc7 24. Qg4 g6 25. Nd2 f5 26. Qf4 g5 27. Qf3 Nd8 28. Be5 Rxc1 29. Rxc1 Qxf3 30. Nxf3 Nf7 31. Bb2 g4 32. Nd4 Ng5 33. Nc6 Nf3+ 34. Kg2 Bf6 35. Ba3 Rf7 36. Bb4 Rc7 37. Ba5 Rd7 38. Nb8 Rd6 39. Bb4 Rd8 40. Nc6 Rd7 41. h3 h5 42. h4 Kg7 43. Nb8 Rd8 44. Nxa6 Bb2 45. Rc7+ Kg6 46. Kf1 Rd1+ 47. Ke2 Ra1 48. Rc2 Bf6 49. Nc7 Ng1+ 50. Kd3 Rd1+ 51. Rd2 Rc1 52. Nxb5 Nf3 53. Rc2 Ne5+ 54. Kd2 Ra1 55. Nc7 1-0

[Event "Soacha op-A"]
[Site "Soacha"]
[Date "2021.09.10"]
[Round "6"]
[White "Shaffer, Alexander"]
[Black "Leal Cortes, Diego Fernando"]
[Result "0-1"]
[ECO "D58"]
[WhiteElo "1805"]
[BlackElo "1843"]
[PlyCount "41"]
[EventDate "2021.09.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Be7 5. Bg5 h6 6. Bh4 0-0 7. e3 b6 8. Rc1 Bb7 9. Bxf6 Bxf6 10. cxd5 exd5 11. Be2 Nd7 12. 0-0 c5 13. dxc5 Nxc5 14. Nd4 Rc8 15. Bf3 Ne4 16. Qd3 Re8 17. Rfd1 g6 18. Bg4 Rb8 19. b4 Be5 20. b5 Qh4 21. Ra1 0-1

[Event "Soacha op-A"]
[Site "Soacha"]
[Date "2021.09.09"]
[Round "4"]
[White "Pereira Vera, Henry Alberto"]
[Black "Shaffer, Alexander"]
[Result "0-1"]
[ECO "A02"]
[WhiteElo "1802"]
[BlackElo "1805"]
[PlyCount "23"]
[EventDate "2021.09.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. b3 c5 2. Bb2 Nc6 3. f4 e6 4. Nf3 Nf6 5. e3 Be7 6. Be2 0-0 7. 0-0 b6 8. c4 Bb7 9. Nc3 d5 10. cxd5 Nxd5 11. Nxd5 Qd7 12. Nc3 0-1

[Event "Soacha op-A"]
[Site "Soacha"]
[Date "2021.09.09"]
[Round "3"]
[White "Shaffer, Alexander"]
[Black "Cuesta Cifuentes, Jair Alfonso"]
[Result "0-1"]
[ECO "D38"]
[WhiteElo "1805"]
[BlackElo "1948"]
[PlyCount "147"]
[EventDate "2021.09.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Bb4 5. cxd5 Qxd5 6. Qa4+ Nc6 7. Bd2 Bxc3 8. bxc3 b5 9. Qb3 Na5 10. Qxd5 exd5 11. e3 Bd7 12. Ne5 Nc4 13. Bxc4 bxc4 14. Rb1 Ke7 15. Ke2 Rhb8 16. f3 Rb6 17. Rb4 Rxb4 18. cxb4 Bb5 19. Bc3 Ne8 20. Ra1 Ba4 21. Rb1 f6 22. Ng4 Nd6 23. Nf2 Re8 24. Kd2 Kd7 25. Re1 f5 26. g4 Rf8 27. gxf5 Rxf5 28. Ng4 Nf7 29. f4 Nd6 30. Nf2 Rh5 31. h3 Kd8 32. Rg1 g6 33. Rg5 Rxg5 34. fxg5 Bd7 35. Ke2 Nf7 36. h4 Nd6 37. Kf3 Nf5 38. e4 dxe4+ 39. Kxe4 Nd6+ 40. Kd5 Ke7 41. Nd1 Be6+ 42. Kc6 Ne4 43. b5 Kd8 44. Ba5 Kc8 45. a4 Bg4 46. Nc3 Ng3 47. Kc5 Nf5 48. Nd5 Bd1 49. Kxc4 Bxa4 50. Nxc7 Nxh4 51. Ne6 Nf3 52. Nf8 Nxg5 53. Bd2 Nf3 54. Bh6 g5 55. Nxh7 g4 56. Bf4 Ng1 57. Nf6 Ne2 58. Nh5 Nxf4 59. Nxf4 g3 60. Ne2 g2 61. Kb4 Bd1 62. Ng1 Bg4 63. Kc5 Kd7 64. Kd5 Bf5 65. Kc5 Bd3 66. Nf3 Be4 67. Ng1 Ke6 68. Ne2 Kf5 69. d5 Kg4 70. d6 Bf5 71. Kd4 Kf3 72. Ng1+ Kf2 73. Ke5 Bd7 74. Kd4 0-1

[Event "Soacha op-A"]
[Site "Soacha"]
[Date "2021.09.08"]
[Round "1"]
[White "Shaffer, Alexander"]
[Black "Gallego, Julian Andres"]
[Result "0-1"]
[ECO "A47"]
[WhiteElo "1805"]
[BlackElo "2157"]
[PlyCount "67"]
[EventDate "2021.09.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. Bd3 c5 5. 0-0 Bb7 6. c3 Qc7 7. Nbd2 Be7 8. Qe2 Nc6 9. Re1 g5 10. Nxg5 Rg8 11. f4 cxd4 12. exd4 h6 13. Ngf3 Nd5 14. Ne4 Nxf4 15. Bxf4 Qxf4 16. Rf1 Qc7 17. Rae1 0-0-0 18. Ba6 f5 19. Bxb7+ Kxb7 20. Ned2 Rg7 21. Nc4 Rdg8 22. Rf2 Rg4 23. Qd3 Bh4 24. Nxh4 Rxh4 25. Ne5 Ne7 26. Nf3 Rf4 27. Qe3 Nd5 28. Qe5 Qxe5 29. Rxe5 Rfg4 30. Kf1 Nf4 31. Ne1 Nd5 32. g3 f4 33. gxf4 Nxf4 34. Rf3 0-1

[Event "Soacha op-A"]
[Site "Soacha"]
[Date "2021.09.08"]
[Round "2"]
[White "Villamil Alarcon, Hector Orlando"]
[Black "Shaffer, Alexander"]
[Result "1-0"]
[ECO "C55"]
[WhiteElo "2063"]
[BlackElo "1805"]
[PlyCount "157"]
[EventDate "2021.09.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. 0-0 d6 6. h3 0-0 7. Bg5 h6 8. Be3 Na5 9. Bb3 c5 10. Nbd2 Qc7 11. c3 Nxb3 12. axb3 d5 13. exd5 Nxd5 14. Nc4 f6 15. Nh4 Rd8 16. Qh5 Nf4 17. Bxf4 exf4 18. Rfe1 b5 19. Na3 Rb8 20. Nf5 Bxf5 21. Qxf5 Bf8 22. Re2 b4 23. Nc4 bxc3 24. bxc3 Rxb3 25. Qe6+ Qf7 26. Qxf7+ Kxf7 27. Rxa7+ Kg6 28. Re4 Rxc3 29. Rxf4 Rcxd3 30. Rg4+ Kh7 31. Ne3 R3d4 32. Rg3 R8d7 33. Ra1 Bd6 34. Rf3 Rf4 35. Rg3 Be5 36. Rc1 Ra4 37. Rf3 Ra1 38. Rxa1 Bxa1 39. Kf1 Bd4 40. Nf5 Be5 41. Ke2 g6 42. Ne3 f5 43. Nc4 Bg7 44. Ra3 Rd4 45. Nd2 g5 46. Rc3 Rd5 47. Rc4 Kg6 48. Nb3 Bf8 49. g4 f4 50. Nd2 Kf6 51. Ne4+ Ke5 52. f3 Rd4 53. Rc1 Kd5 54. Nc3+ Kc6 55. Ne4 Kb5 56. Rb1+ Rb4 57. Rd1 Rd4 58. Rxd4 cxd4 59. Kd3 Bc5 60. Nf6 Kc6 61. Ng8 Kd5 62. Nxh6 Ke6 63. Nf5 Kd5 64. h4 gxh4 65. Nxh4 Be7 66. Nf5 Bf6 67. Nh6 Bh4 68. Nf5 Bf6 69. Kd2 Kc4 70. Nd6+ Kd5 71. Ne4 Bg7 72. Kd3 Be5 73. Nd2 Bg7 74. Ne4 Be5 75. Nf2 Bg7 76. Nh3 Ke5 77. Kc4 Bf6 78. Nf2 Bg7 79. Nd3+ 1-0

