[Event "US Open-74"]
[Site "Chicago"]
[Date "1973.??.??"]
[Round "10"]
[White "Hulse, Brian"]
[Black "Lapiken, Peter Petrovich"]
[Result "1/2-1/2"]
[ECO "C34"]
[PlyCount "72"]
[EventDate "1973.08.12"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. f4 exf4 3. Nf3 Nf6 4. e5 Nh5 5. Be2 g6 6. 0-0 d5 7. d4 c5 8. c3 Nc6 9. Nbd2 b6 10. Nb3 c4 11. Nbd2 b5 12. Ne1 Ng7 13. Rxf4 h5 14. Nc2 Nf5 15. Nf1 Qb6 16. Nce3 Nxe3 17. Nxe3 Be6 18. Rf2 Be7 19. b3 Rd8 20. Rb1 cxb3 21. Rxb3 a6 22. g4 Bh4 23. Rg2 Na5 24. Rb1 Qc6 25. Bd2 hxg4 26. Bxg4 Nc4 27. Nxc4 dxc4 28. Bxe6 Qxe6 29. a4 Rd5 30. Bc1 Rh5 31. Qc2 Kf8 32. axb5 axb5 33. Ba3+ Kg7 34. Bc5 Rxc5 35. dxc5 Rxe5 36. Rf1 Rxc5 1/2-1/2

[Event "US Open-74"]
[Site "Chicago"]
[Date "1973.??.??"]
[Round "11"]
[White "Lapiken, Peter Petrovich"]
[Black "Franett, Michael"]
[Result "1/2-1/2"]
[ECO "A04"]
[PlyCount "42"]
[EventDate "1973.08.12"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d3 Nc6 4. g3 g6 5. Bg2 Bg7 6. 0-0 Nge7 7. Re1 d6 8. c3 0-0 9. d4 e5 10. dxc5 dxc5 11. Be3 b6 12. Qc1 Qc7 13. b4 Nd8 14. bxc5 bxc5 15. Qa3 Ne6 16. Ng5 Nxg5 17. Bxg5 Be6 18. Nd2 Rfd8 19. Bf1 f6 20. Be3 Bf8 21. Nc4 Nc8 1/2-1/2

[Event "US Open-74"]
[Site "Chicago"]
[Date "1973.??.??"]
[Round "7"]
[White "Lapiken, Peter Petrovich"]
[Black "Hudson, John A"]
[Result "1/2-1/2"]
[ECO "C00"]
[PlyCount "46"]
[EventDate "1973.08.12"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. g3 b6 5. Bg2 Bb7 6. Nh3 dxe4 7. dxe4 Nbd7 8. 0-0 Nc5 9. Qe2 Ba6 10. c4 Qd3 11. Qxd3 Nxd3 12. e5 0-0-0 13. exf6 Nxc1 14. Raxc1 Rxd2 15. Ng5 gxf6 16. Nxf7 Rg8 17. Rfd1 Rxd1+ 18. Rxd1 Bg7 19. b3 Rf8 20. Bh3 Re8 21. Kf1 Kb8 22. Rd8+ Rxd8 23. Nxd8 e5 1/2-1/2

[Event "US Open-74"]
[Site "Chicago"]
[Date "1973.??.??"]
[Round "6"]
[White "Timm, John C"]
[Black "Lapiken, Peter Petrovich"]
[Result "1/2-1/2"]
[ECO "C96"]
[PlyCount "53"]
[EventDate "1973.08.12"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Be7 7. Re1 d6 8. c3 0-0 9. h3 Na5 10. Bc2 c6 11. d4 Qc7 12. Nbd2 Bd7 13. Nf1 Rfe8 14. b3 Nb7 15. Ng3 Kh8 16. Bg5 g6 17. Qd2 Ng8 18. Bxe7 Rxe7 19. Rad1 f6 20. Bd3 Qb6 21. dxe5 dxe5 22. Qe3 Qxe3 23. Rxe3 Be6 24. Bc2 Nh6 25. Red3 Nf7 26. R3d2 Kg7 27. Nh2 1/2-1/2

[Event "US Open-72"]
[Site "Ventura"]
[Date "1971.??.??"]
[Round "7"]
[White "Binet Tapaszto, Laszlo"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "A45"]
[PlyCount "60"]
[EventDate "1971.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 h6 3. Bh4 c5 4. e3 Qb6 5. Nc3 cxd4 6. exd4 Qxb2 7. Nge2 Na6 8. Rb1 Qa3 9. Qd2 Qa5 10. Nc1 Nc7 11. Nb3 Qh5 12. Bg3 Nfd5 13. Be2 Qg6 14. Bd3 f5 15. Ne2 e6 16. 0-0 d6 17. c4 Nf6 18. c5 Qf7 19. cxd6 Ncd5 20. Nc5 b6 21. Bb5+ Bd7 22. Nxd7 Nxd7 23. Bc6 Rb8 24. Bxd5 exd5 25. Qe3+ Kd8 26. Nf4 g5 27. Ne6+ Kc8 28. Qc3+ Kb7 29. Qc7+ Ka8 30. Qc6+ Rb7 1-0

[Event "US Open-72"]
[Site "Ventura"]
[Date "1971.??.??"]
[Round "5"]
[White "Kovacs, Zoltan"]
[Black "Lapiken, Peter Petrovich"]
[Result "0-1"]
[ECO "E41"]
[PlyCount "82"]
[EventDate "1971.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6 8. Nd2 e5 9. d5 Ne7 10. 0-0 Bf5 11. Bxf5 Nxf5 12. e4 Ne7 13. Re1 h6 14. Nf1 g5 15. Ng3 Rg8 16. Rb1 Qd7 17. a4 0-0-0 18. Qb3 Kb8 19. Re2 Ka8 20. Reb2 Rb8 21. f3 h5 22. Qc2 g4 23. f4 h4 24. Nf1 exf4 25. Bxf4 Ng6 26. Bg5 Nh7 27. Bh6 Rge8 28. Ne3 Nf6 29. Rf1 Nxe4 30. Nf5 Re5 31. Rbb1 Nxc3 32. Bg7 Nxb1 33. Bxe5 Nxe5 34. Rxb1 Nxc4 35. Qxc4 Qxf5 36. Rf1 Qg6 37. a5 a6 38. Qe2 f5 39. Qe7 h3 40. Re1 f4 41. Re4 g3 0-1

[Event "US Open-72"]
[Site "Ventura"]
[Date "1971.??.??"]
[Round "8"]
[White "Lapiken, Peter Petrovich"]
[Black "Ervin, Roy C"]
[Result "0-1"]
[ECO "A13"]
[PlyCount "108"]
[EventDate "1971.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. c4 e6 2. b3 d5 3. Bb2 Nf6 4. Nf3 c6 5. Qc2 Nbd7 6. d3 Bd6 7. Nbd2 0-0 8. e3 Qe7 9. Be2 a5 10. a4 e5 11. 0-0 e4 12. Ne1 Nc5 13. Bd4 Bf5 14. Rc1 exd3 15. Nxd3 Ne6 16. Nf3 Nxd4 17. Nxd4 Be4 18. c5 Bc7 19. Qd1 Rae8 20. Rc3 Nd7 21. Qc1 f5 22. g3 g5 23. Ne1 f4 24. Bh5 Bg6 25. Bxg6 hxg6 26. Qc2 Kg7 27. Kg2 Ne5 28. Qb2 Qf6 29. exf4 gxf4 30. gxf4 Qxf4 31. Rg3 Rf6 32. Kg1 Nd7 33. Ng2 Qe5 34. f4 Qh5 35. Rg5 Qh7 36. Nh4 Kf7 37. Rg4 Re4 38. Ndf3 Bxf4 39. Rxf4 Rexf4 40. Ng5+ Kg8 41. Rxf4 Qh5 42. Ne6 Rxe6 43. Nf3 Ne5 44. Qc3 Nxf3+ 45. Rxf3 Re2 46. Rh3 Qe5 47. Qxe5 Rxe5 48. Kf2 Rh5 49. Re3 Rxh2+ 50. Kg3 Rb2 51. Kg4 Kf7 52. Rf3+ Ke6 53. Re3+ Kf6 54. Kf4 Rc2 0-1

[Event "US Open-72"]
[Site "Ventura"]
[Date "1971.??.??"]
[Round "6"]
[White "Lapiken, Peter Petrovich"]
[Black "Martin, Raymond"]
[Result "1-0"]
[ECO "A26"]
[PlyCount "73"]
[EventDate "1971.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 d6 5. Nf3 0-0 6. 0-0 e5 7. d3 Nc6 8. Bd2 Bd7 9. h3 Rb8 10. Qc1 Ne7 11. a4 c6 12. b4 Ne8 13. Be3 b6 14. a5 d5 15. cxd5 cxd5 16. axb6 axb6 17. Bh6 f6 18. Bxg7 Kxg7 19. Qb2 Nd6 20. Nd2 d4 21. Nd5 Nxd5 22. Bxd5 Bxh3 23. Ra7+ Kh8 24. Rfa1 Nb5 25. Qb3 Nxa7 26. Rxa7 Bc8 27. b5 f5 28. Nf3 Re8 29. Qa2 Re7 30. Ng5 Kg7 31. f4 Bb7 32. Bxb7 Qc7 33. Ne6+ Rxe6 34. Bc6 Rxc6 35. bxc6 Rc8 36. Rxc7+ Rxc7 37. Qe6 1-0

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.22"]
[Round "12"]
[White "Lapiken, Peter Petrovich"]
[Black "Harger, Daniel"]
[Result "1/2-1/2"]
[ECO "A04"]
[PlyCount "74"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. g3 g6 2. Bg2 Bg7 3. Nf3 d6 4. 0-0 e5 5. d3 Nc6 6. Nbd2 Nge7 7. Rb1 Be6 8. a3 h6 9. b4 Qd7 10. Re1 Bh3 11. Bh1 h5 12. c4 h4 13. e3 Qg4 14. Qe2 hxg3 15. fxg3 Nf5 16. Qf2 Qh5 17. b5 Nce7 18. Nf1 Nh6 19. N3d2 Rb8 20. e4 Ng4 21. Qxa7 Kd7 22. Bf3 Ra8 23. Bxg4+ Bxg4 24. Qf2 Bh6 25. c5 dxc5 26. Qxc5 Be2 27. b6 Bxd2 28. Rxe2 Bxc1 29. Rc2 Bxa3 30. Qxc7+ Ke8 31. Qxb7 Rd8 32. Qa6 Bd6 33. b7 Bb8 34. Rc8 Kd7 35. Rc5 Ke8 36. Rbc1 Kf8 37. R1c2 Kg7 1/2-1/2

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.20"]
[Round "10"]
[White "Lapiken, Peter Petrovich"]
[Black "Sildmets, Anton"]
[Result "0-1"]
[ECO "D78"]
[PlyCount "60"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. g3 d5 2. Nf3 g6 3. Bg2 Bg7 4. d4 Nf6 5. 0-0 0-0 6. c4 e6 7. Nc3 c6 8. b3 Nbd7 9. Qc2 dxc4 10. bxc4 Nb6 11. Na4 Nxa4 12. Qxa4 Bd7 13. Qc2 Rc8 14. Rb1 b5 15. Ba3 Re8 16. Ne5 a6 17. Bc5 Bf8 18. Nd3 Qc7 19. Bxf8 Rxf8 20. a4 Qa7 21. Nc5 Rfd8 22. axb5 cxb5 23. Ra1 a5 24. cxb5 Bxb5 25. Rfb1 Rb8 26. e3 Rdc8 27. Qa2 a4 28. Nxa4 Bxa4 29. Rxb8 Rxb8 30. Qxa4 Rb1+ 0-1

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.19"]
[Round "9"]
[White "Zalys, Ignas"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "C41"]
[PlyCount "87"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. h3 c6 7. Be3 Qc7 8. a4 0-0 9. Qd2 b6 10. 0-0 Bb7 11. Be2 a6 12. Rfb1 d5 13. exd5 cxd5 14. dxe5 Ne4 15. Nxd5 Nxd2 16. Nxc7 Nxb1 17. Nxa8 Nc3 18. bxc3 Rxa8 19. Bd4 Rc8 20. Nd2 Rc7 21. Bd3 Nc5 22. Nc4 Nxa4 23. Nxb6 Nxb6 24. Bxb6 Rxc3 25. Bd4 Rc7 26. c3 Rc8 27. Rb1 Rc7 28. Ra1 Rc8 29. f4 f6 30. Bxa6 Bxa6 31. Rxa6 fxe5 32. Bxe5 Kf8 33. Kf2 g6 34. Kf3 Kf7 35. Bd4 Ke8 36. Ke4 Kf7 37. g4 Rc7 38. Ra7 Rc6 39. Be5 Rc4+ 40. Kd3 Rc6 41. c4 Ke6 42. Bd4 Bd6 43. Ke4 Rxc4 44. f5+ 1-0

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.18"]
[Round "8"]
[White "Clayton, Carl"]
[Black "Lapiken, Peter Petrovich"]
[Result "0-1"]
[ECO "B06"]
[PlyCount "80"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Bc4 d6 4. Nf3 Nf6 5. Qe2 0-0 6. h3 c6 7. Nc3 d5 8. exd5 cxd5 9. Bd3 Nc6 10. 0-0 a6 11. Re1 e6 12. Bg5 Qd6 13. a3 h6 14. Bh4 Nh5 15. Rad1 f5 16. Na4 Nf4 17. Qe3 Nxd3 18. Qxd3 Rb8 19. Bg3 f4 20. Bh2 g5 21. Ne5 Nxe5 22. dxe5 Qc7 23. h4 Bd7 24. Nc3 Rf5 25. Nxd5 exd5 26. Qxd5+ Rf7 27. e6 Bxe6 28. Rxe6 Qxc2 29. hxg5 hxg5 30. Rde1 Qf5 31. Qb3 Kh7 32. Qf3 Rc8 33. Qh5+ Kg8 34. Rg6 Rc5 35. Kh1 Kf8 36. Bg1 f3 37. g4 Qd7 38. Bh2 Re7 39. Bd6 Qxd6 40. Rxd6 Rxe1+ 0-1

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.17"]
[Round "7"]
[White "Lapiken, Peter Petrovich"]
[Black "Schwartz, Stewart"]
[Result "0-1"]
[ECO "E72"]
[PlyCount "90"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. g3 g6 2. d4 Nf6 3. Bg2 Bg7 4. e4 d6 5. Ne2 0-0 6. 0-0 e5 7. d5 Nbd7 8. c4 a5 9. Nbc3 Nc5 10. b3 Ne8 11. Rb1 f5 12. f3 f4 13. a3 g5 14. b4 axb4 15. axb4 Nd7 16. Bd2 Ndf6 17. h3 h5 18. c5 Rf7 19. h4 Nh7 20. hxg5 Nxg5 21. Qc1 Bh6 22. Kf2 fxg3+ 23. Nxg3 h4 24. Nf5 Bxf5 25. exf5 Rxf5 26. Ke2 Qf6 27. Rh1 Rxf3 28. Rg1 Rf2+ 29. Ke1 Kh8 30. Be3 Nf3+ 31. Bxf3 Bxe3 32. Qxe3 Rxf3 33. Qd2 Qf4 34. Qxf4 Rxf4 35. Kd2 Ra3 36. Rbf1 Rxf1 37. Rxf1 Ng7 38. Rf6 Kh7 39. Ne4 Ra2+ 40. Kc1 Rg2 41. Nxd6 cxd6 42. c6 bxc6 43. dxc6 Ne6 44. c7 Nxc7 45. Rxd6 h3 0-1

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.15"]
[Round "6"]
[White "Lapiken, Peter Petrovich"]
[Black "Pease, Ronald"]
[Result "1-0"]
[ECO "A25"]
[PlyCount "117"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 Bc5 5. e3 Nc6 6. Nge2 e4 7. d4 exd3 8. Qxd3 d6 9. b3 0-0 10. 0-0 Ne5 11. Qc2 Qe7 12. a3 c6 13. Nd4 g6 14. Rd1 f4 15. exf4 Neg4 16. h3 Nh6 17. g4 Nhxg4 18. hxg4 Nxg4 19. Nce2 Qh4 20. Be3 Bd7 21. b4 Bb6 22. c5 Bc7 23. Nf3 Nxe3 24. fxe3 Qf6 25. Qc3 Qxc3 26. Nxc3 d5 27. Kf2 Rae8 28. Ne2 Bd8 29. Rh1 Rf7 30. Rag1 Bf6 31. Bh3 Bxh3 32. Rxh3 Bb2 33. a4 Ba3 34. Rb1 a5 35. b5 Bxc5 36. Nfd4 cxb5 37. Rxb5 b6 38. Rf3 h5 39. Rb1 Kg7 40. Rg1 Kh6 41. Rg5 Bxd4 42. Nxd4 Rc8 43. Rfg3 Rf6 44. f5 Rcf8 45. Rxg6+ Kh7 46. Rg7+ Kh6 47. R3g6+ Rxg6 48. Rxg6+ Kh7 49. Rxb6 Rg8 50. Rb1 Kh6 51. Rg1 Rc8 52. Rg6+ Kh7 53. Ne6 Re8 54. Ng5+ Kh8 55. f6 Rf8 56. Kg3 d4 57. exd4 Re8 58. Nf7+ Kh7 59. Rg7# 1-0

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.14"]
[Round "5"]
[White "Olins, Ermanis"]
[Black "Lapiken, Peter Petrovich"]
[Result "1/2-1/2"]
[ECO "D25"]
[PlyCount "84"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. Nc3 Nf6 4. e3 g6 5. Bxc4 Bg7 6. Nf3 0-0 7. 0-0 Nfd7 8. Bxf7+ Rxf7 9. Ng5 Nf8 10. Nxf7 Kxf7 11. Qb3+ e6 12. d5 Bxc3 13. dxe6+ Bxe6 14. Qxc3 Nc6 15. e4 Qd4 16. Qf3+ Kg8 17. Be3 Qg7 18. b3 Nd7 19. Rad1 Nf6 20. Bh6 Qxh6 21. Qxf6 Re8 22. f3 Qg7 23. Qf4 a5 24. Rd2 Rd8 25. Rxd8+ Nxd8 26. Rd1 Nc6 27. Qe3 Qe7 28. f4 Qa3 29. f5 Bf7 30. Rd7 Qxa2 31. Rxc7 Qa1+ 32. Kf2 Qb2+ 33. Kg3 Qe5+ 34. Qf4 Qc3+ 35. Kh4 Qe1+ 36. g3 Qd1 37. Kh3 Qh5+ 38. Qh4 gxf5 39. Qxh5 Bxh5 40. exf5 Bf7 41. Rxb7 Nd4 42. f6 h6 1/2-1/2

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.13"]
[Round "4"]
[White "Lapiken, Peter Petrovich"]
[Black "Willis, David W"]
[Result "0-1"]
[ECO "A07"]
[PlyCount "74"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. g3 d5 2. Nf3 Nf6 3. Bg2 c6 4. 0-0 Bf5 5. d3 h6 6. Nbd2 e6 7. Re1 Be7 8. c3 0-0 9. b4 a5 10. Qb3 axb4 11. cxb4 Qb6 12. Rb1 Nbd7 13. a3 Bh7 14. e4 Ng4 15. Re2 Nge5 16. Nxe5 Nxe5 17. Bb2 Ng6 18. h4 Rfe8 19. Rbe1 dxe4 20. Nxe4 Rad8 21. h5 Nf8 22. Qc3 f6 23. Re3 Kh8 24. Bh3 Bg8 25. g4 Bf7 26. f4 Nh7 27. g5 Bg8 28. gxh6 gxh6 29. Kf1 Bf7 30. Bxe6 Bxe6 31. Nc5 Bxc5 32. Rxe6 Rxe6 33. Rxe6 Bd4 34. Qe1 Bxb2 35. Re8+ Nf8 36. Qe7 Rxe8 37. Qxe8 Kg8 0-1

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.11"]
[Round "2"]
[White "Lapiken, Peter Petrovich"]
[Black "Wight, Leverett"]
[Result "1-0"]
[ECO "E72"]
[PlyCount "69"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. g3 g6 2. e4 Bg7 3. d4 Nf6 4. Bg2 d6 5. Ne2 0-0 6. 0-0 Nc6 7. h3 e5 8. d5 Ne7 9. c4 Ne8 10. Nbc3 f5 11. f3 Nf6 12. Be3 Bd7 13. Qd2 Kh8 14. b4 a6 15. a4 Qc8 16. Kh2 Qe8 17. c5 Rd8 18. cxd6 cxd6 19. Rfb1 Rc8 20. b5 a5 21. Bb6 Ra8 22. Nd1 Neg8 23. Bxa5 Bh6 24. Qe1 Qc8 25. Bb4 Qc7 26. Nec3 Rfc8 27. a5 Bf8 28. Bf1 Qd8 29. Bd3 Nh5 30. Na4 Rc7 31. Nb6 Rb8 32. Nc3 f4 33. g4 Ng3 34. Nc4 Rbc8 35. Nxd6 1-0

[Event "USA Annual op-ch69"]
[Site "Aspen"]
[Date "1968.08.??"]
[Round "?"]
[White "Fisher, J."]
[Black "Lapiken, Peter Petrovich"]
[Result "0-1"]
[ECO "A25"]
[PlyCount "84"]
[EventDate "1968.08.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e5 3. g3 Bc5 4. Bg2 0-0 5. d3 Nc6 6. h4 h6 7. e3 d6 8. Nge2 Bd7 9. a3 a5 10. Rb1 Re8 11. 0-0 Qc8 12. f3 Nh7 13. Nd5 Ne7 14. d4 exd4 15. Nxe7+ Rxe7 16. Nxd4 a4 17. Kh2 Ra6 18. Re1 Nf8 19. Bd2 Qe8 20. Bf1 Ng6 21. Bd3 Ne5 22. Bc3 g6 23. Rc1 c6 24. Kg2 h5 25. Qe2 Ra8 26. Bc2 Bc8 27. Rcd1 Qd7 28. Kf2 Qc7 29. Kg2 b6 30. f4 Bg4 31. Qf1 Bxd4 32. fxe5 Bxe5 33. Bxe5 Rxe5 34. Rd2 Rae8 35. Qf4 b5 36. cxb5 cxb5 37. Rf2 Qb7+ 38. Kg1 R8e7 39. Qd4 Qc7 40. Bd3 Rc5 41. Rf6 d5 42. Ref1 Qxg3+ 0-1

[Event "USA Annual op-ch69"]
[Site "Aspen"]
[Date "1968.08.??"]
[Round "?"]
[White "Lapiken, Peter Petrovich"]
[Black "Burger, Karl"]
[Result "0-1"]
[ECO "B09"]
[PlyCount "118"]
[EventDate "1968.08.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 d6 2. d4 g6 3. Nc3 Bg7 4. f4 Nf6 5. Nf3 0-0 6. Be3 Na6 7. Qd2 c6 8. h3 b5 9. Bd3 Bb7 10. Qe2 Qa5 11. Bd2 b4 12. Nd1 c5 13. c3 Nh5 14. Qf2 cxd4 15. cxd4 e5 16. fxe5 dxe5 17. 0-0 exd4 18. a3 Nc5 19. Bxb4 Nxd3 20. Bxa5 Nxf2 21. Nxf2 Ng3 22. Rfd1 Rfe8 23. Bc7 Nxe4 24. Nxd4 Rac8 25. Ba5 Ba6 26. Nxe4 Rxe4 27. Bc3 Rd8 28. Nf5 Rxd1+ 29. Rxd1 gxf5 30. Rd8+ Bf8 31. Bb4 Rxb4 32. axb4 Bb5 33. Rd5 a6 34. Rxf5 Bxb4 35. Kf2 Bd3 36. Rg5+ Kf8 37. Ke3 Bc2 38. g4 a5 39. Re5 a4 40. Kd4 Be7 41. g5 Bb3 42. Rb5 Kg7 43. h4 h6 44. Ke4 hxg5 45. hxg5 Kg6 46. Kf4 Bd6+ 47. Kg4 Be6+ 48. Kh4 Bf8 49. Ra5 Bb3 50. Ra6+ Kh7 51. Ra7 Bg7 52. Kh5 Bd1+ 53. Kh4 Kg6 54. Rd7 Bb3 55. Rd2 Kf5 56. Kh5 Be5 57. Rf2+ Bf4 58. Kh4 Ke4 59. Rf1 Be3 0-1

[Event "USA Annual op-ch69"]
[Site "Aspen"]
[Date "1968.08.??"]
[Round "?"]
[White "Lapiken, Peter Petrovich"]
[Black "Rohland, Marshall"]
[Result "1-0"]
[ECO "B25"]
[PlyCount "77"]
[EventDate "1968.08.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e5 7. Nh3 Nf6 8. 0-0 Bg4 9. Qd2 Nd4 10. Nf2 h5 11. h3 Be6 12. Ncd1 exf4 13. gxf4 Bh6 14. c3 Bxf4 15. Qe1 Nc2 16. Qe2 Nxa1 17. Bxf4 Bxa2 18. Ne3 Nb3 19. Bg5 Na5 20. b4 cxb4 21. cxb4 Nc6 22. Qxa2 Nxb4 23. Qa4+ Qd7 24. Qxb4 Nh7 25. Nd5 0-0 26. Bh6 Rfe8 27. Qd4 Re5 28. Bf4 Ree8 29. h4 b5 30. Bh3 Qd8 31. Bg5 Nxg5 32. Nf6+ Kf8 33. hxg5 Re7 34. Nd7+ Kg8 35. Qxd6 a5 36. e5 a4 37. e6 a3 38. exf7+ Rxf7 39. Qxg6+ 1-0

[Event "USA Annual op-ch69"]
[Site "Aspen"]
[Date "1968.08.??"]
[Round "?"]
[White "Seglins, Viesturs"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "C47"]
[PlyCount "29"]
[EventDate "1968.08.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. Nxc6 bxc6 7. Qd4 Qe7 8. Bd3 d5 9. 0-0 c5 10. Bb5+ Kf8 11. Qd1 Bxc3 12. bxc3 dxe4 13. Ba3 Rb8 14. Bxc5 Rxb5 15. Qd8+ 1-0

[Event "USA Annual op-ch69"]
[Site "Aspen"]
[Date "1968.08.??"]
[Round "?"]
[White "Wallach, Naor"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "D20"]
[PlyCount "65"]
[EventDate "1968.08.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e4 e5 4. Nf3 exd4 5. Bxc4 c5 6. 0-0 Nc6 7. h3 Qc7 8. e5 Be6 9. Bxe6 fxe6 10. Qb3 Nd8 11. Na3 a6 12. Bg5 Be7 13. Nc4 h6 14. Bf4 g5 15. Bh2 h5 16. Nd6+ Kd7 17. Rac1 g4 18. Nxd4 gxh3 19. Qxh3 Qb6 20. Nb3 Bxd6 21. exd6 Rc8 22. Qg3 Nh6 23. Rfe1 Rg8 24. Qf4 Nf5 25. Rxe6 Nxe6 26. Qxf5 Rg7 27. Re1 Re8 28. Re5 Qc6 29. Nxc5+ Kd8 30. Bg3 Rxg3 31. fxg3 Nf8 32. Qf6+ Kc8 33. d7+ 1-0

[Event "US Open-63"]
[Site "San Antonio"]
[Date "1962.08.24"]
[Round "11"]
[White "Sullivan, Joseph G"]
[Black "Lapiken, Peter Petrovich"]
[Result "1/2-1/2"]
[ECO "D26"]
[PlyCount "86"]
[EventDate "1962.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 c5 4. e3 e6 5. Nc3 Nc6 6. a3 dxc4 7. Bxc4 cxd4 8. exd4 Be7 9. 0-0 0-0 10. d5 exd5 11. Nxd5 Nxd5 12. Bxd5 Bf6 13. Qb3 Qb6 14. Qxb6 axb6 15. Ra2 Ra5 16. Bc4 Rc5 17. b3 b5 18. Be3 Rh5 19. Be2 Be6 20. Nd4 Re5 21. Nxe6 fxe6 22. g3 Ra8 23. Bf3 Nb4 24. Rd2 Nc6 25. Rd7 Rxa3 26. Rxb7 Nd8 27. Rb8 Rxb3 28. Bd4 Kf7 29. Bxe5 Bxe5 30. Rxd8 Rxf3 31. Rb1 Bf6 32. Rd7+ Ke8 33. Rc7 Rf5 34. f4 Rd5 35. Rb7 e5 36. R7xb5 Rxb5 37. Rxb5 exf4 38. gxf4 Kf7 39. Kg2 h6 40. Kf3 Kg6 41. Kg4 Kf7 42. h4 Ba1 43. Rb7+ Kf6 1/2-1/2

[Event "US Open-63"]
[Site "San Antonio"]
[Date "1962.08.23"]
[Round "10"]
[White "Lapiken, Peter Petrovich"]
[Black "Medina Garcia, Antonio Angel"]
[Result "0-1"]
[ECO "A14"]
[PlyCount "176"]
[EventDate "1962.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 e6 3. Bg2 d5 4. Nf3 Be7 5. 0-0 0-0 6. b3 b6 7. Bb2 Bb7 8. d3 c5 9. e3 Nc6 10. Qe2 Qc7 11. Nc3 Rad8 12. Rfd1 Ba6 13. Rac1 Qb8 14. Qc2 Rfe8 15. Qb1 Bb7 16. Ne2 e5 17. cxd5 Nxd5 18. Qa1 Bf6 19. Ne1 Qd6 20. Nc3 Nxc3 21. Bxc3 Re6 22. Bh3 Re7 23. Bg2 Qe6 24. Qb2 h5 25. Qe2 g6 26. h3 a5 27. Kh2 Ba6 28. Be4 Nb4 29. Bxb4 axb4 30. Qf3 Bc8 31. Qg2 Ra7 32. Rc2 Be7 33. f4 f5 34. Bf3 Bf6 35. e4 Qd6 36. d4 fxe4 37. dxe5 exf3 38. Rxd6 fxg2 39. Rxf6 Bf5 40. Rxg2 Rd1 41. Re2 Ra1 42. g4 hxg4 43. hxg4 R7xa2 44. Rxa2 Rxa2+ 45. Kg1 Be4 46. Rxb6 Kg7 47. Rb5 Rb2 48. Rxc5 Rxb3 49. Rc4 Bd5 50. Rd4 Be6 51. Nd3 Rb1+ 52. Kf2 b3 53. f5 gxf5 54. Nc5 Bc8 55. Nxb3 Rxb3 56. gxf5 Bxf5 57. Rf4 Kg6 58. Rf3 Rb5 59. Re3 Be6 60. Ke2 Kf5 61. Kd3 Rb3+ 62. Kd4 Rb4+ 63. Kc5 Rc4+ 64. Kb5 Rc1 65. Kb4 Bd5 66. Re2 Be4 67. e6 Rc6 68. e7 Re6 69. Rf2+ Ke5 70. Kc5 Rxe7 71. Re2 Re6 72. Re1 Rc6+ 73. Kb5 Rc3 74. Kb6 Kd5 75. Rg1 Kd6 76. Kb5 Bd5 77. Rg4 Rd3 78. Rh4 Be6 79. Rf4 Kd5 80. Rb4 Bd7+ 81. Kb6 Kd6 82. Rb2 Bc6 83. Ka5 Rd4 84. Rb1 Ra4+ 85. Kb6 Ra8 86. Rb4 Kd5 87. Kc7 Kc5 88. Rb1 Ra7+ 0-1

[Event "US Open-63"]
[Site "San Antonio"]
[Date "1962.08.22"]
[Round "9"]
[White "Lux, Tom"]
[Black "Lapiken, Peter Petrovich"]
[Result "0-1"]
[ECO "C82"]
[PlyCount "78"]
[EventDate "1962.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 10. Bc2 0-0 11. Nbd2 Nxd2 12. Nxd2 Qh4 13. Nf3 Qh5 14. Bf4 g6 15. Nd4 Qxd1 16. Rfxd1 Nd8 17. a4 b4 18. a5 Be7 19. Bh6 c5 20. Bxf8 Bxf8 21. Nxe6 fxe6 22. cxb4 c4 23. f4 Bxb4 24. g4 Rb8 25. Kg2 Bc5 26. Ra2 Nc6 27. Ba4 Nb4 28. Raa1 Nd3 29. b3 Nxf4+ 30. Kf3 Nd3 31. bxc4 Nxe5+ 32. Kg3 Nxc4 33. Bd7 Rb3+ 34. Kh4 Kf7 35. Rab1 Bf2+ 36. Kg5 Rf3 37. Rb7 h6+ 38. Kxh6 Rh3+ 39. Kg5 Be3# 0-1

[Event "US Open-63"]
[Site "San Antonio"]
[Date "1962.08.21"]
[Round "8"]
[White "Kane, George E"]
[Black "Lapiken, Peter Petrovich"]
[Result "0-1"]
[ECO "C86"]
[PlyCount "74"]
[EventDate "1962.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. 0-0 0-0 8. c3 d6 9. Rd1 Na5 10. Bc2 c6 11. d4 Qc7 12. Nbd2 Re8 13. Nf1 Nc4 14. Ng3 Bf8 15. b3 Nb6 16. dxe5 dxe5 17. Bg5 Nbd7 18. h3 h6 19. Be3 a5 20. Nd2 Bc5 21. Ndf1 Ba3 22. c4 Ba6 23. Bd3 Rab8 24. f3 Nc5 25. cxb5 cxb5 26. Rac1 Qd6 27. Bxc5 Bxc5+ 28. Ne3 Nh5 29. Ngf1 Nf4 30. Qc2 Rec8 31. Qb1 Qb6 32. Kf2 Qg6 33. Rxc5 Rxc5 34. b4 axb4 35. Qxb4 Rbc8 36. Ng3 Qd6 37. Be2 Qxd1 0-1

[Event "US Open-63"]
[Site "San Antonio"]
[Date "1962.08.20"]
[Round "7"]
[White "Lapiken, Peter Petrovich"]
[Black "Radaikin, Vitaley"]
[Result "1-0"]
[ECO "B01"]
[PlyCount "85"]
[EventDate "1962.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Bc4 Bg4 6. f3 Bh5 7. g4 Bg6 8. h4 h5 9. g5 Nfd7 10. Bd2 c6 11. Nh3 e6 12. Qe2 Bd6 13. 0-0-0 0-0 14. Nd5 Qd8 15. Ndf4 Re8 16. Nxg6 fxg6 17. f4 Qe7 18. f5 gxf5 19. Qxh5 Nf8 20. g6 Nbd7 21. Rhg1 Nf6 22. Qxf5 b5 23. Bb3 a5 24. a3 Bxa3 25. Qf3 Bxb2+ 26. Kxb2 a4 27. Ba2 b4 28. Bc4 b3 29. cxb3 Reb8 30. Ra1 Qd6 31. Qf4 Qd8 32. Rg5 Rb7 33. Qe5 c5 34. Nf4 axb3 35. Nxe6 Ra2+ 36. Rxa2 bxa2+ 37. Ka1 Nxe6 38. Bxe6+ Kf8 39. Qxc5+ Qe7 40. Qxe7+ Kxe7 41. Bxa2 Kd7 42. Re5 Ra7 43. Bg5 1-0

[Event "US Open-63"]
[Site "San Antonio"]
[Date "1962.08.17"]
[Round "5"]
[White "Lapiken, Peter Petrovich"]
[Black "Castle, Richard"]
[Result "0-1"]
[ECO "C63"]
[PlyCount "62"]
[EventDate "1962.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 Nf6 5. 0-0 fxe4 6. Ne1 Bc5 7. d3 exd3 8. Nxd3 Bd4 9. Ne2 0-0 10. c3 Bb6 11. Bxc6 dxc6 12. Qb3+ Qd5 13. c4 Qe6 14. c5 Qxb3 15. axb3 e4 16. cxb6 exd3 17. Nf4 cxb6 18. Nxd3 Be6 19. Ra3 Nd5 20. Bd2 a5 21. h4 Rad8 22. b4 Nxb4 23. Bxb4 axb4 24. Nxb4 Rd2 25. b3 c5 26. Na2 b5 27. Nc1 c4 28. Re1 Bd5 29. bxc4 bxc4 30. Ra2 Rfxf2 31. Re2 Rfxe2 0-1

[Event "US Open-63"]
[Site "San Antonio"]
[Date "1962.08.16"]
[Round "4"]
[White "Rohland, Marshall"]
[Black "Lapiken, Peter Petrovich"]
[Result "1/2-1/2"]
[ECO "C73"]
[PlyCount "74"]
[EventDate "1962.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 Bg4 7. dxe5 dxe5 8. Qe2 Qf6 9. Nbd2 Bd6 10. h3 Be6 11. Nc4 h6 12. Bd2 Ne7 13. Bc3 Ng6 14. Nxd6+ cxd6 15. g3 0-0 16. Nd2 Qe7 17. h4 f5 18. h5 Nh8 19. exf5 Rxf5 20. 0-0-0 Nf7 21. f4 Qd7 22. Rhe1 Re8 23. Qxa6 Rxh5 24. Ne4 Rh2 25. Nc5 Qc8 26. Qxc8 Bxc8 27. Ne4 Bf5 28. Rd2 Rxd2 29. Kxd2 Ra8 30. a3 Ra4 31. b4 exf4 32. gxf4 Rxa3 33. Ng3 Bg4 34. Re8+ Kh7 35. Re7 Kg8 36. Re8+ Kh7 37. Re7 Kg8 1/2-1/2

[Event "US Open-63"]
[Site "San Antonio"]
[Date "1962.08.14"]
[Round "2"]
[White "Hidalgo, Charles"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "C79"]
[PlyCount "65"]
[EventDate "1962.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. 0-0 Nf6 7. Re1 g6 8. d4 Qe7 9. Bg5 h6 10. Bh4 Bg7 11. Nbd2 0-0 12. Bxc6 Bxc6 13. dxe5 dxe5 14. Nc4 g5 15. Bg3 Rad8 16. Qc2 Nd7 17. Ne3 Qe6 18. Nf5 f6 19. b4 Nb6 20. Nd2 Ba4 21. Nb3 Rfe8 22. Rad1 Bf8 23. f3 c5 24. Rxd8 Rxd8 25. bxc5 Nc4 26. Rd1 Rxd1+ 27. Qxd1 Na5 28. Be1 Nxb3 29. axb3 Bxc5+ 30. Bf2 Bxf2+ 31. Kxf2 Qb6+ 32. Kg3 Qxb3 33. Qd8+ 1-0

[Event "US Open-62"]
[Site "San Francisco"]
[Date "1961.08.26"]
[Round "12"]
[White "Lapiken, Peter Petrovich"]
[Black "Kovacs, Zoltan his"]
[Result "0-1"]
[ECO "B84"]
[PlyCount "28"]
[EventDate "1961.08.14"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e6 7. 0-0 a6 8. Be3 Qc7 9. f4 Be7 10. Bf3 Na5 11. Nce2 e5 12. Nf5 Bxf5 13. exf5 e4 14. Bxe4 Nxe4 0-1

[Event "US Open-62"]
[Site "San Francisco"]
[Date "1961.08.25"]
[Round "11"]
[White "Bisguier, Arthur Bernard"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "C86"]
[PlyCount "41"]
[EventDate "1961.08.14"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. 0-0 0-0 8. c3 d5 9. d3 Qd6 10. Rd1 Be6 11. Nbd2 h6 12. d4 Nd7 13. dxe5 Ncxe5 14. exd5 Bxd5 15. Ne4 Nxf3+ 16. Qxf3 Ne5 17. Qe3 Ng4 18. Qh3 Qg6 19. Bxd5 Rad8 20. f3 Qxe4 21. fxe4 1-0

[Event "US Open-62"]
[Site "San Francisco"]
[Date "1961.08.24"]
[Round "10"]
[White "Lapiken, Peter Petrovich"]
[Black "Levy, Louis"]
[Result "1-0"]
[ECO "B01"]
[PlyCount "77"]
[EventDate "1961.08.14"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Bc4 Bg4 6. f3 Bf5 7. a3 e6 8. Bd2 c6 9. g4 Bg6 10. h4 h6 11. Qe2 Qc7 12. 0-0-0 Nbd7 13. Nh3 0-0-0 14. Nf4 Bh7 15. Bxe6 fxe6 16. Nxe6 Qb6 17. Nxd8 Qxd8 18. g5 Nh5 19. Rhe1 Bd6 20. Qe6 Bg3 21. d5 Nf4 22. Bxf4 Bxf4+ 23. Kb1 c5 24. g6 Bg8 25. Qg4 Qf8 26. Re4 Bb8 27. Rde1 Kd8 28. h5 Nf6 29. Qf5 Qd6 30. Re5 a6 31. a4 Qd7 32. Qxd7+ Kxd7 33. Re7+ Kd6 34. Rxg7 Bxd5 35. Nxd5 Kxd5 36. Rxb7 Nxh5 37. Rb6 a5 38. Re4 c4 39. Rb5+ 1-0

[Event "US Open-62"]
[Site "San Francisco"]
[Date "1961.08.23"]
[Round "9"]
[White "Lapiken, Peter Petrovich"]
[Black "Barry, James"]
[Result "1-0"]
[ECO "D43"]
[PlyCount "91"]
[EventDate "1961.08.14"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 c6 5. Bg5 h6 6. Bxf6 Qxf6 7. e4 dxe4 8. Nxe4 Bb4+ 9. Ned2 0-0 10. Bd3 Nd7 11. 0-0 Bxd2 12. Qxd2 c5 13. Qe3 cxd4 14. Qe4 g6 15. b4 Rd8 16. Rad1 Qg7 17. Qxd4 Qxd4 18. Nxd4 Nc5 19. Bc2 Na6 20. a3 Nc7 21. f4 Ne8 22. Be4 Nd6 23. Nb5 f5 24. Rxd6 Rxd6 25. Nxd6 fxe4 26. Nxe4 b6 27. Nd6 Kf8 28. Kf2 Ke7 29. Rd1 Bd7 30. Rd2 Rd8 31. Ne4 Rf8 32. Ke3 Bc6 33. Nf2 h5 34. Nd3 Ra8 35. Ne5 Be8 36. g3 Kf6 37. h4 Rc8 38. g4 hxg4 39. Nxg4+ Kf5 40. Ne5 Rc7 41. Rd8 Re7 42. c5 bxc5 43. bxc5 Kf6 44. c6 Bf7 45. Rf8 Rc7 46. Rxf7+ 1-0

[Event "US Open-62"]
[Site "San Francisco"]
[Date "1961.08.22"]
[Round "8"]
[White "Sullivan, Joseph G"]
[Black "Lapiken, Peter Petrovich"]
[Result "0-1"]
[ECO "E94"]
[PlyCount "70"]
[EventDate "1961.08.14"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 0-0 5. e4 d6 6. Be2 e5 7. 0-0 c6 8. h3 Nbd7 9. Be3 Qe7 10. d5 Ne8 11. Ne1 f5 12. exf5 gxf5 13. f4 Kh8 14. Qd2 Ndf6 15. Nd3 cxd5 16. fxe5 Ne4 17. Nxe4 dxe4 18. exd6 Qxd6 19. Nf4 Qxd2 20. Bxd2 Bxb2 21. Rad1 a5 22. Be3 Nf6 23. Bc5 Re8 24. Nh5 Be6 25. Rb1 Nxh5 26. Rxb2 Ng3 27. Re1 Nxe2+ 28. Rexe2 Bxc4 29. Bd4+ Kg8 30. Rf2 e3 31. Rxf5 b5 32. Re5 Rxe5 33. Bxe5 e2 34. Bg3 Rf8 35. Bf2 e1Q+ 0-1

[Event "US Open-62"]
[Site "San Francisco"]
[Date "1961.08.21"]
[Round "7"]
[White "Lapiken, Peter Petrovich"]
[Black "Kraus, Andrew"]
[Result "1-0"]
[ECO "C40"]
[PlyCount "39"]
[EventDate "1961.08.14"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. Nc4 fxe4 5. Nc3 Qe6 6. d3 c6 7. dxe4 d5 8. Ne3 dxe4 9. Bc4 Qg6 10. Bxg8 Rxg8 11. Qd4 Nd7 12. Nxe4 Be7 13. 0-0 Nf6 14. Nd6+ Bxd6 15. Qxd6 Kf7 16. Qc7+ Nd7 17. Nc4 Kf8 18. Nd6 Nf6 19. Nxc8 Nd5 20. Qxb7 1-0

[Event "US Open-62"]
[Site "San Francisco"]
[Date "1961.08.20"]
[Round "6"]
[White "Byrne, Robert Eugene"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "E66"]
[PlyCount "91"]
[EventDate "1961.08.14"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 0-0 5. Nc3 d6 6. Nf3 Nc6 7. 0-0 e5 8. d5 Na5 9. Nd2 c5 10. dxc6 Nxc6 11. Nde4 Ne8 12. Nd5 h6 13. b3 f5 14. Nec3 Rf7 15. Bb2 Be6 16. Qd2 g5 17. Rad1 Rc8 18. e3 Bf8 19. f4 Ng7 20. Rf2 Nh5 21. Qe2 Nf6 22. fxe5 Nxe5 23. Nxf6+ Rxf6 24. Bxb7 Rb8 25. Bd5 Bxd5 26. Nxd5 Rf7 27. Rdf1 Qc8 28. e4 Qc5 29. Kg2 Re8 30. Rxf5 Rxf5 31. exf5 Qc6 32. Qh5 Re7 33. f6 Re6 34. Bxe5 dxe5 35. h4 gxh4 36. gxh4 Kh8 37. Qg6 e4 38. Kh1 Qd7 39. Rg1 Qh7 40. Nf4 Qxg6 41. Nxg6+ Kg8 42. Nf4+ Kf7 43. Nxe6 Kxe6 44. Rg8 Kf7 45. Rxf8+ Kxf8 46. c5 1-0

[Event "US Open-62"]
[Site "San Francisco"]
[Date "1961.08.17"]
[Round "4"]
[White "Lapiken, Peter Petrovich"]
[Black "Benko, Pal C"]
[Result "0-1"]
[ECO "B25"]
[PlyCount "60"]
[EventDate "1961.08.14"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. g3 g6 3. Bg2 Bg7 4. Ne2 Nf6 5. Nbc3 Nc6 6. d3 d6 7. 0-0 0-0 8. h3 Ne8 9. f4 f5 10. Be3 Nd4 11. Bf2 Nc7 12. Nxd4 cxd4 13. Ne2 e5 14. c3 dxc3 15. bxc3 fxe4 16. dxe4 Be6 17. fxe5 dxe5 18. Qc2 Qc8 19. a4 Bxh3 20. Bxh3 Qxh3 21. Qb3+ Ne6 22. Bc5 Bh6 23. Rf5 gxf5 24. Qxe6+ Kh8 25. Qxe5+ Bg7 26. Qd5 Rad8 27. Qxb7 f4 28. Bxf8 Rxf8 29. Nxf4 Qxg3+ 30. Ng2 Be5 0-1

[Event "US Open-62"]
[Site "San Francisco"]
[Date "1961.08.15"]
[Round "2"]
[White "Spence, Jack"]
[Black "Lapiken, Peter Petrovich"]
[Result "0-1"]
[ECO "C27"]
[PlyCount "74"]
[EventDate "1961.08.14"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Qxe5+ Qe7 6. Qxe7+ Bxe7 7. Bb3 Nf5 8. Nf3 c6 9. d3 d5 10. Bf4 Nd7 11. 0-0-0 Nc5 12. Rde1 Ne6 13. Bd2 h5 14. Ne2 a5 15. a3 a4 16. Ba2 b5 17. h3 h4 18. Ne5 Bd7 19. g4 hxg3 20. fxg3 Bd6 21. Nxd7 Kxd7 22. g4 Nh4 23. Ref1 f6 24. c4 bxc4 25. dxc4 d4 26. Nf4 Nxf4 27. Bxf4 Bxf4+ 28. Rxf4 c5 29. g5 f5 30. Bb1 g6 31. Rg1 Kd6 32. Bd3 Rae8 33. Bc2 Re3 34. Bxa4 Nf3 35. Rg3 Ne5 36. Rxe3 dxe3 37. Kd1 Nd3 0-1

[Event "US Open-61"]
[Site "Saint Louis"]
[Date "1960.08.19"]
[Round "12"]
[White "Baylor, George Walker"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "C34"]
[PlyCount "41"]
[EventDate "1960.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. f4 exf4 3. Nf3 Nf6 4. Nc3 Bb4 5. e5 Nh5 6. Nd5 Be7 7. Be2 c6 8. Nxe7 Qxe7 9. 0-0 g6 10. d4 d6 11. exd6 Qxd6 12. Ne5 c5 13. Bxh5 gxh5 14. Qxh5 Be6 15. Bxf4 Qd5 16. c4 Qxd4+ 17. Kh1 Rg8 18. Nxf7 Qxb2 19. Ng5+ Kd7 20. Rab1 Qc2 21. Rxb7+ 1-0

[Event "US Open-61"]
[Site "Saint Louis"]
[Date "1960.08.18"]
[Round "11"]
[White "Lapiken, Peter Petrovich"]
[Black "Collins, John William"]
[Result "1-0"]
[ECO "B38"]
[PlyCount "73"]
[EventDate "1960.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Be3 Bg7 6. Qd2 Nf6 7. f3 0-0 8. c4 d6 9. Nc3 Bd7 10. 0-0-0 a6 11. Bh6 Rc8 12. Nxc6 Bxc6 13. g4 b5 14. h4 b4 15. Nd5 Bxd5 16. exd5 Qa5 17. Kb1 Qa4 18. Bd3 e6 19. h5 exd5 20. hxg6 fxg6 21. Bxg7 Kxg7 22. Qh6+ Kf7 23. g5 dxc4 24. gxf6 cxd3 25. Rde1 Qc2+ 26. Ka1 Kxf6 27. Qh4+ Kf5 28. f4 Qg2 29. Qe7 Rce8 30. Qd7+ Kf6 31. Qxd6+ Kf5 32. Qxd3+ Kf6 33. Qd6+ Kf5 34. Reg1 Qf2 35. Qd5+ Kf6 36. Qg5+ Kg7 37. Rxh7+ 1-0

[Event "US Open-61"]
[Site "Saint Louis"]
[Date "1960.08.14"]
[Round "7"]
[White "Lapiken, Peter Petrovich"]
[Black "Ragan, John"]
[Result "0-1"]
[ECO "B45"]
[PlyCount "72"]
[EventDate "1960.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Nf6 6. Bg5 Bb4 7. Ndb5 Qa5 8. Bxf6 gxf6 9. a3 Be7 10. Nd6+ Kf8 11. Qd2 Qg5 12. 0-0-0 Bxd6 13. Qxg5 fxg5 14. Rxd6 Ke7 15. Rd2 a6 16. Be2 b5 17. Rhd1 Rd8 18. Rd6 Bb7 19. g3 Rac8 20. f4 gxf4 21. gxf4 Rc7 22. f5 Ne5 23. Rb6 Rg8 24. Re1 Rg2 25. h4 Rh2 26. a4 bxa4 27. Bxa6 a3 28. Rxb7 axb2+ 29. Kxb2 Rxb7+ 30. Bxb7 Nd3+ 31. Kb1 Nxe1 32. e5 Nxc2 33. f6+ Kf8 34. Ne4 Na3+ 35. Ka1 Nc4 36. Ng5 Rxh4 0-1

[Event "US Open-60"]
[Site "Omaha"]
[Date "1959.08.01"]
[Round "12"]
[White "Lapiken, Peter Petrovich"]
[Black "Murphy, Alpen Gardner"]
[Result "1-0"]
[ECO "B00"]
[PlyCount "31"]
[EventDate "1959.07.20"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 Nc6 2. d4 e5 3. dxe5 Nxe5 4. f4 Ng6 5. Nf3 d6 6. Nc3 Nf6 7. Bc4 Be7 8. 0-0 0-0 9. Qe2 Re8 10. f5 Ne5 11. Nxe5 dxe5 12. Be3 Bd6 13. g4 h6 14. h4 Nh7 15. g5 hxg5 16. hxg5 1-0

[Event "US Open-60"]
[Site "Omaha"]
[Date "1959.07.31"]
[Round "11"]
[White "Vincent, Richard"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "B07"]
[PlyCount "67"]
[EventDate "1959.07.20"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Bd3 c6 4. Ne2 e5 5. c3 h6 6. h3 a6 7. 0-0 g5 8. g4 h5 9. f3 hxg4 10. hxg4 Bh6 11. Na3 b5 12. Ng3 Be6 13. Nc2 Nbd7 14. a4 d5 15. axb5 axb5 16. Rxa8 Qxa8 17. Qe2 dxe4 18. Nxe4 Nd5 19. dxe5 Nf4 20. Bxf4 gxf4 21. Nd4 Bg7 22. Nf6+ Kd8 23. Nxe6+ fxe6 24. Nxd7 Kxd7 25. Qd2 Bxe5 26. Bxb5+ Kc7 27. Rd1 Rh3 28. Qf2 Rg3+ 29. Kf1 Bd6 30. Bd3 c5 31. Be2 Qa2 32. Qh2 Qxb2 33. Qh7+ Kc6 34. Rb1 1-0

[Event "US Open-60"]
[Site "Omaha"]
[Date "1959.07.27"]
[Round "7"]
[White "Hearst, Eliot Sanford"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "C41"]
[PlyCount "43"]
[EventDate "1959.07.20"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. 0-0 Be7 6. a4 h6 7. b3 Qc7 8. Bb2 Ngf6 9. Nbd2 g5 10. Be2 Rh7 11. dxe5 dxe5 12. Nc4 Ng4 13. h3 b5 14. axb5 cxb5 15. Na3 h5 16. Bxb5 f6 17. Qd5 Kf8 18. Qxa8 Nb8 19. Nc4 Bc5 20. Ba3 Bxa3 21. Rxa3 a6 22. Bxa6 1-0

[Event "US Open-60"]
[Site "Omaha"]
[Date "1959.07.24"]
[Round "5"]
[White "Shaw, Jack F"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "E40"]
[PlyCount "71"]
[EventDate "1959.07.20"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Nc6 5. Bd3 e5 6. Nge2 exd4 7. exd4 d5 8. 0-0 0-0 9. a3 Be7 10. c5 a6 11. f3 Ne8 12. Qc2 g6 13. Bh6 Ng7 14. Be3 Bf6 15. Qd2 Ne6 16. Bc2 b6 17. cxb6 cxb6 18. Bb3 Ne7 19. Rac1 Bb7 20. Nf4 Ng7 21. Nfe2 b5 22. Bf4 Nc8 23. a4 b4 24. Na2 a5 25. Rc7 Ba6 26. Rc5 Bxe2 27. Qxe2 Ne6 28. Qd2 Nxc5 29. dxc5 d4 30. Nc1 Re8 31. Nd3 Qd7 32. Qc2 Na7 33. Bd6 Rac8 34. Qc4 Nc6 35. Qd5 Kg7 36. Bf8+ 1-0

[Event "US Open-60"]
[Site "Omaha"]
[Date "1959.07.23"]
[Round "4"]
[White "Lapiken, Peter Petrovich"]
[Black "Rohland, Marshall"]
[Result "1-0"]
[ECO "B22"]
[PlyCount "87"]
[EventDate "1959.07.20"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 cxd4 5. cxd4 Nc6 6. Nf3 e5 7. Nc3 Bb4 8. Bd2 Bxc3 9. Bxc3 e4 10. Ne5 Nxe5 11. dxe5 Be6 12. Qa4+ Bd7 13. Qb4 a5 14. Qb6 Ne7 15. Qd6 Qxd6 16. exd6 Nf5 17. g4 Nxd6 18. Bxg7 Rg8 19. Be5 Nc8 20. h3 Ne7 21. Rd1 Bc6 22. Rg1 Rd8 23. Rg3 Rxd1+ 24. Kxd1 Rg5 25. Bf6 Rc5 26. Rc3 Rxc3 27. Bxc3 a4 28. a3 Nd5 29. Bd4 Ke7 30. Kc2 Ke6 31. b4 axb3+ 32. Kxb3 f5 33. gxf5+ Kxf5 34. a4 Kg5 35. a5 Kh4 36. Kc4 Nf4 37. Kc5 Nd3+ 38. Kb6 Bd5 39. Be3 Kh5 40. Be2+ Kh4 41. Bg4 h5 42. Bc8 Ne5 43. Bd4 Nd3 44. Bf6# 1-0

[Event "US Open-59"]
[Site "Rochester"]
[Date "1958.08.15"]
[Round "12"]
[White "Lapiken, Peter Petrovich"]
[Black "Ballbe Anglada, Francisco"]
[Result "0-1"]
[ECO "C63"]
[PlyCount "72"]
[EventDate "1958.08.04"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. d3 Nf6 5. 0-0 d6 6. Nc3 a6 7. Bxc6+ bxc6 8. d4 fxe4 9. dxe5 exf3 10. exf6 Qxf6 11. Re1+ Kf7 12. Ne4 Qf5 13. Ng5+ Kg8 14. Nxf3 Qd5 15. Bd2 h6 16. Re8 c5 17. Qe2 Bd7 18. Rxa8 Qxa8 19. Nh4 Qe8 20. Qxa6 Qe4 21. Nf3 Qxc2 22. Qb7 Bg4 23. Bc3 Qf5 24. Nh4 Qh5 25. g3 d5 26. Qxc7 d4 27. Bd2 g5 28. f3 Be6 29. Ng2 Qxf3 30. Rf1 Qd5 31. Qb8 Kg7 32. h4 Bd6 33. Qa7+ Kg6 34. hxg5 hxg5 35. Bxg5 Qxg5 36. Qb6 Qxg3 0-1

[Event "US Open-59"]
[Site "Rochester"]
[Date "1958.08.14"]
[Round "11"]
[White "Collins, John William"]
[Black "Lapiken, Peter Petrovich"]
[Result "1/2-1/2"]
[ECO "E53"]
[PlyCount "82"]
[EventDate "1958.08.04"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 0-0 6. Nf3 d5 7. 0-0 b6 8. a3 Bxc3 9. bxc3 Ba6 10. cxd5 Bxd3 11. Qxd3 exd5 12. dxc5 bxc5 13. c4 dxc4 14. Qxc4 Qd5 15. Qe2 Nbd7 16. Bb2 Ne4 17. Rfd1 Qe6 18. Rac1 Rab8 19. Qc2 f5 20. Nd2 Rf7 21. Nxe4 fxe4 22. Rd2 Rb6 23. Qc4 Qxc4 24. Rxc4 Re7 25. Kf1 Kf7 26. Ke2 Ke8 27. Ra4 a6 28. Kd1 Kd8 29. Rc4 Ke8 30. h4 h5 31. Kc2 g6 32. a4 Rc6 33. a5 Ree6 34. Rd5 Rc8 35. Rg5 Ke7 36. Kd1 Kd6 37. g4 hxg4 38. Rxg4 Kd5 39. Rc2 Rb8 40. Rg5+ Kc6 41. h5 gxh5 1/2-1/2

[Event "US Open-59"]
[Site "Rochester"]
[Date "1958.08.13"]
[Round "10"]
[White "Weinstein, Raymond Allen"]
[Black "Lapiken, Peter Petrovich"]
[Result "1/2-1/2"]
[ECO "D09"]
[PlyCount "85"]
[EventDate "1958.08.04"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 Be6 6. b3 Qd7 7. Bg2 0-0-0 8. 0-0 Bh3 9. e3 Bxg2 10. Kxg2 Bc5 11. exd4 Nxd4 12. Nc3 Ne7 13. Nxd4 Bxd4 14. Bb2 Qc6+ 15. Kg1 Bxe5 16. Qh5 Ng6 17. Nb5 Qf6 18. Bxe5 Nxe5 19. Nxa7+ Kb8 20. Nb5 Rd2 21. Nc3 g6 22. Ne4 Qe7 23. Qxe5 Qxe5 24. Nxd2 h5 25. h4 Qf5 26. Rfe1 g5 27. hxg5 h4 28. Ne4 hxg3 29. Nxg3 Qxg5 30. Rad1 Rd8 31. Kg2 Rxd1 32. Rxd1 c6 33. Re1 Kc7 34. Re4 Qg6 35. Re2 f5 36. f4 Qg4 37. Re5 Qxf4 38. Rxf5 Qg4 39. Rf2 Kb6 40. Rf5 Qd4 41. Rf2 Kc5 42. Rf5+ Kb4 43. Rf2 1/2-1/2

[Event "US Open-59"]
[Site "Rochester"]
[Date "1958.08.12"]
[Round "9"]
[White "Lapiken, Peter Petrovich"]
[Black "Hudson, John A"]
[Result "1-0"]
[ECO "B20"]
[PlyCount "75"]
[EventDate "1958.08.04"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Ne2 Nc6 3. g3 d5 4. Bg2 Nf6 5. exd5 Nxd5 6. 0-0 Nf6 7. d3 Bg4 8. f3 Bd7 9. Be3 e5 10. f4 exf4 11. Nxf4 Be7 12. h3 0-0 13. Nc3 a6 14. a4 Rb8 15. Qd2 Nb4 16. Qf2 Bc6 17. Ne4 Re8 18. Bxc5 Bxe4 19. dxe4 Qc7 20. Bxe7 Rxe7 21. c3 Nc6 22. Nd5 Nxd5 23. exd5 Ne5 24. Rad1 Rd8 25. Rd4 Rd6 26. Rfd1 Red7 27. Kh1 f6 28. Be4 g6 29. Bg2 Kg7 30. Rf4 a5 31. Qd4 b6 32. b4 Rd8 33. bxa5 bxa5 34. c4 Rc8 35. Bf1 Nd7 36. Rb1 Nc5 37. Rb5 Ne6 38. Qxf6+ 1-0

[Event "US Open-59"]
[Site "Rochester"]
[Date "1958.08.11"]
[Round "8"]
[White "Lapiken, Peter Petrovich"]
[Black "Shaw, Jack F"]
[Result "1-0"]
[ECO "B06"]
[PlyCount "105"]
[EventDate "1958.08.04"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Ne2 d6 3. g3 Nf6 4. Bg2 g6 5. 0-0 Bg7 6. c3 0-0 7. d4 e5 8. d5 h6 9. f4 exf4 10. gxf4 Bg4 11. Re1 Re8 12. Qc2 Qe7 13. c4 Bxe2 14. Rxe2 Ng4 15. Bh3 Bd4+ 16. Kg2 Qh4 17. Nc3 g5 18. Qd3 gxf4 19. Bxf4 Ne5 20. Qg3+ Qxg3+ 21. hxg3 Bxc3 22. bxc3 Kg7 23. Rh1 Na6 24. Bf5 Rh8 25. Bxe5+ dxe5 26. d6 Rad8 27. Rd1 b6 28. Rd5 f6 29. a4 Nb8 30. a5 Nc6 31. axb6 axb6 32. Rb2 Rb8 33. d7 Na5 34. Ra2 Nxc4 35. Ra7 Rhd8 36. Kf3 h5 37. Rc7 Na5 38. Rc8 Nb7 39. Kg2 Kf7 40. Kh3 Ke7 41. Rc6 Na5 42. Re6+ Kf7 43. Rdd6 Nc4 44. Rxf6+ Kg7 45. Rg6+ Kf7 46. Rdf6+ Ke7 47. Rc6 Ne3 48. Rg7+ Kf8 49. Rh7 Nxf5 50. exf5 Rb7 51. Rf6+ Kg8 52. Rff7 Rbb8 53. f6 1-0

[Event "US Open-59"]
[Site "Rochester"]
[Date "1958.08.10"]
[Round "7"]
[White "Lapiken, Peter Petrovich"]
[Black "Santasiere, Anthony Edward"]
[Result "0-1"]
[ECO "A03"]
[PlyCount "70"]
[EventDate "1958.08.04"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 Nxc3 5. bxc3 g6 6. Bg2 c5 7. f4 Bg7 8. Nf3 Nc6 9. 0-0 0-0 10. Rb1 Qc7 11. e4 Rd8 12. Qc2 b6 13. d4 e6 14. Rd1 Ne7 15. Ba3 cxd4 16. Bxe7 Qxe7 17. cxd4 Bb7 18. Qd3 Rac8 19. Rbc1 Rxc1 20. Rxc1 Qd7 21. Kf2 Bxd4+ 22. Qxd4 Qxd4+ 23. Nxd4 Rxd4 24. Rc7 Rd2+ 25. Kg1 Rd1+ 26. Kf2 Rd2+ 27. Kg1 Ba6 28. Rxa7 Rxa2 29. f5 exf5 30. exf5 Bc4 31. Rc7 b5 32. g4 Kg7 33. fxg6 hxg6 34. g5 Be6 35. Rb7 Rxg2+ 0-1

[Event "US Open-59"]
[Site "Rochester"]
[Date "1958.08.05"]
[Round "2"]
[White "Lapiken, Peter Petrovich"]
[Black "Hays, Rhys W"]
[Result "0-1"]
[ECO "C02"]
[PlyCount "66"]
[EventDate "1958.08.04"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 cxd4 7. cxd4 Nge7 8. Bd3 Bd7 9. Bc2 Rc8 10. Nc3 Ng6 11. 0-0 Be7 12. Qd3 Nh4 13. Nxh4 Bxh4 14. Be3 Be7 15. f4 f5 16. Rab1 Na5 17. Rf3 Nc4 18. Bf2 Qc7 19. g4 fxg4 20. Rg3 b6 21. f5 Bh4 22. fxe6 Bxe6 23. Ba4+ Ke7 24. Nb5 Qd8 25. b3 a6 26. Na7 Nxa3 27. Ra1 b5 28. Rxa3 Rc1+ 29. Kg2 bxa4 30. Qxa6 Qc7 31. Nb5 Qc2 32. Qd6+ Kf7 33. Rxa4 Qe4+ 0-1

[Event "US Open-57"]
[Site "Oklahoma"]
[Date "1956.??.??"]
[Round "4"]
[White "Fischer, Robert James"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "A07"]
[PlyCount "37"]
[EventDate "1956.07.16"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 Bf5 4. 0-0 e6 5. d3 c6 6. Nbd2 Na6 7. a3 Nc5 8. c4 b5 9. Nd4 Qd7 10. Nxf5 exf5 11. Nb3 h6 12. Be3 Ne6 13. Nd4 g6 14. Qb3 Rb8 15. Nxc6 Qxc6 16. cxd5 Nc5 17. Qc3 Qd6 18. Bxc5 Qxc5 19. Qxf6 1-0

[Event "US Open-57"]
[Site "Oklahoma"]
[Date "1956.??.??"]
[Round "8"]
[White "Fischheimer, Daniel"]
[Black "Lapiken, Peter Petrovich"]
[Result "1/2-1/2"]
[ECO "B07"]
[PlyCount "88"]
[EventDate "1956.07.16"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f3 Bg7 5. Be3 0-0 6. h4 Nh5 7. Nge2 f5 8. Qd2 e5 9. exf5 gxf5 10. dxe5 dxe5 11. Qxd8 Rxd8 12. Nb5 Na6 13. Nec3 Be6 14. Bd3 b6 15. 0-0-0 c6 16. Nxa7 Rxd3 17. Rxd3 Rxa7 18. Bxb6 Rb7 19. Rd6 Kf7 20. Ba5 Nb8 21. a3 Bf8 22. Rdd1 Nd7 23. Ne2 Bc4 24. Nc3 Ke8 25. Nb1 Ng3 26. Nd2 Ba2 27. Rhe1 Bd5 28. c4 Be6 29. Bc3 Nc5 30. Kc2 e4 31. fxe4 Kf7 32. e5 f4 33. Bb4 Bf5+ 34. Kc3 Nge4+ 35. Nxe4 Nxe4+ 36. Rxe4 Bxb4+ 37. axb4 Bxe4 38. Rd4 Bxg2 39. Rxf4+ Ke6 40. Rg4 Bh1 41. Rg5 Be4 42. Kd4 Rxb4 43. Kxe4 Rxc4+ 44. Kd3 Rxh4 1/2-1/2

[Event "US Open-57"]
[Site "Oklahoma"]
[Date "1956.??.??"]
[Round "12"]
[White "Hudson, John A"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "B07"]
[PlyCount "69"]
[EventDate "1956.07.16"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5 Bg7 5. Qd2 c6 6. h3 Nbd7 7. f4 0-0 8. g4 Ne8 9. Bc4 b5 10. Bb3 Rb8 11. Nf3 Kh8 12. Ne2 Bb7 13. c3 f6 14. Bh4 Nb6 15. f5 Nc7 16. fxg6 hxg6 17. Nf4 Qe8 18. Ne6 Nxe6 19. Bxe6 Bc8 20. Bb3 a5 21. 0-0-0 a4 22. Bc2 Be6 23. a3 Bg8 24. g5 Qf7 25. Rdg1 Nc4 26. Qf4 Nxb2 27. gxf6 exf6 28. Kxb2 Qa2+ 29. Kc1 Qxa3+ 30. Kd1 Qxc3 31. Rxg6 Bb3 32. Bxb3 Qxb3+ 33. Ke2 Qe6 34. Rhg1 Rbe8 35. Qh6+ 1-0

[Event "US Open-57"]
[Site "Oklahoma"]
[Date "1956.??.??"]
[Round "9"]
[White "Lapiken, Peter Petrovich"]
[Black "Mednis, Edmar John"]
[Result "0-1"]
[ECO "E63"]
[PlyCount "80"]
[EventDate "1956.07.16"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 0-0 5. Nf3 d6 6. 0-0 Nc6 7. Nc3 a6 8. e4 Rb8 9. Qe2 Bg4 10. Be3 Qc8 11. Rfd1 b5 12. cxb5 axb5 13. Rac1 b4 14. Nd5 Nxd5 15. exd5 Na7 16. Qc2 Nb5 17. a4 bxa3 18. bxa3 Nxa3 19. Qxc7 Bf6 20. Qxc8 Rfxc8 21. Rxc8+ Bxc8 22. h3 h5 23. Rc1 Rb1 24. Rxb1 Nxb1 25. Kf1 Bb7 26. Ng5 Kg7 27. Ke2 Nc3+ 28. Kd2 Bxd5 29. Kxc3 Bxg2 30. h4 Bd5 31. Nh3 Kf8 32. f4 Ke8 33. Nf2 Kd7 34. Kd3 Ke6 35. Bd2 Kf5 36. Ba5 e5 37. dxe5 dxe5 38. Bc7 exf4 39. Bxf4 Bxh4 40. Ke3 Be7 0-1

[Event "US Open-57"]
[Site "Oklahoma"]
[Date "1956.??.??"]
[Round "7"]
[White "Lapiken, Peter Petrovich"]
[Black "Romanenko, Ivan1"]
[Result "1-0"]
[ECO "C86"]
[PlyCount "99"]
[EventDate "1956.07.16"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Qe2 b5 7. Bb3 0-0 8. a4 b4 9. a5 d6 10. c3 Rb8 11. Bc4 Nh5 12. d4 bxc3 13. bxc3 Nxa5 14. Rxa5 Rxb1 15. Bxa6 Bg4 16. h3 Bxf3 17. Qxf3 c5 18. Ra2 Nf6 19. dxe5 dxe5 20. Bc4 Qc7 21. g4 Nd7 22. Qd3 Rbb8 23. Be3 Nb6 24. Rfa1 Rfd8 25. Bd5 Nxd5 26. exd5 c4 27. Qe4 Rdc8 28. Ra7 Qd8 29. Qxe5 Bf6 30. Qf5 Rb5 31. Rd7 Qe8 32. Raa7 Rd8 33. Rxd8 Qxd8 34. Rd7 Qe8 35. Rc7 Rb8 36. Rxc4 Rd8 37. Rc6 h6 38. c4 Bh4 39. Kg2 g6 40. Qf3 Ra8 41. d6 Ra3 42. Rc7 Bd8 43. Rc8 Qd7 44. Qc6 Qe6 45. Rxd8+ Kh7 46. Re8 Qf6 47. Qf3 Qg7 48. Re7 Kg8 49. d7 Rxe3 50. Qxe3 1-0

[Event "US Open-57"]
[Site "Oklahoma"]
[Date "1956.??.??"]
[Round "11"]
[White "Lapiken, Peter Petrovich"]
[Black "Rozsa, Bela"]
[Result "1-0"]
[ECO "C86"]
[PlyCount "67"]
[EventDate "1956.07.16"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Qe2 b5 7. Bb3 d6 8. a4 b4 9. a5 0-0 10. c3 Rb8 11. Bc4 Qd7 12. h3 Rd8 13. d4 bxc3 14. dxe5 Nxe5 15. Nxe5 dxe5 16. Nxc3 Qc6 17. Bg5 Rd4 18. Bd3 h6 19. Bxf6 Bxf6 20. Nd5 Bd8 21. Rfc1 Qd6 22. Ra3 Bb7 23. Bc4 Qg6 24. Rb3 c6 25. Ne3 Kh7 26. Qf3 Bc7 27. Nf5 Rd7 28. Qe2 c5 29. Rg3 Qf6 30. Rxg7+ Kh8 31. Rc3 Bxa5 32. Rcg3 Bd2 33. Qg4 Qd8 34. Rh7+ 1-0

[Event "US Open-57"]
[Site "Oklahoma"]
[Date "1956.??.??"]
[Round "5"]
[White "Lapiken, Peter Petrovich"]
[Black "Van Sweden, Elias J"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "53"]
[EventDate "1956.07.16"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 cxd4 6. cxd4 Bb4+ 7. Nbd2 Nge7 8. a3 Bxd2+ 9. Bxd2 a6 10. Bd3 Qb6 11. Bc3 Bd7 12. 0-0 Ng6 13. Qd2 Qd8 14. g3 f5 15. exf6 Qxf6 16. Qe3 0-0 17. Kg2 Rae8 18. Rae1 h6 19. Bc2 Re7 20. Qd3 Qf5 21. Re3 e5 22. Qxf5 Bxf5 23. Bxf5 Rxf5 24. dxe5 Ngxe5 25. Nxe5 d4 26. Nxc6 Rxe3 27. Nxd4 1-0

[Event "US Open-57"]
[Site "Oklahoma"]
[Date "1956.??.??"]
[Round "10"]
[White "Marchand, Erich Watkinson"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "E92"]
[PlyCount "155"]
[EventDate "1956.07.16"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. c4 Nf6 2. Nf3 g6 3. Nc3 Bg7 4. e4 d6 5. d4 0-0 6. Be2 e5 7. Bg5 c6 8. dxe5 dxe5 9. Qxd8 Rxd8 10. Nxe5 Re8 11. f4 h6 12. Bh4 g5 13. fxg5 hxg5 14. Bg3 Na6 15. 0-0 Nc5 16. Nxf7 Ncxe4 17. Nxe4 Nxe4 18. Bh5 Bd4+ 19. Kh1 Re7 20. Rae1 Nxg3+ 21. hxg3 Bf6 22. Rxe7 Bxe7 23. Re1 Kf8 24. Nh8 Bf5 25. Rf1 Kg7 26. Rxf5 Kxh8 27. Rf7 Re8 28. Kh2 Kg8 29. Kh3 a5 30. Kg4 b6 31. Bg6 Bc5 32. a3 Re2 33. b4 axb4 34. axb4 Bxb4 35. Rf6 Rxg2 36. Rxc6 Bc5 37. Be4 Rg1 38. Rg6+ Kf7 39. Rxg5 Bd6 40. Rf5+ Ke7 41. Rf3 Be5 42. Rd3 Rc1 43. Kf5 Bxg3 44. Rxg3 Rxc4 45. Rb3 Rc5+ 46. Kf4 b5 47. Bd3 Kd6 48. Bxb5 Rh5 49. Be2 Ra5 50. Bf3 Kc5 51. Rd3 Kc4 52. Rd1 Ra7 53. Bd5+ Kc3 54. Ke3 Rh7 55. Rc1+ Kb4 56. Kd4 Rh4+ 57. Be4 Ka4 58. Rc4+ Kb5 59. Rc1 Ka4 60. Rb1 Rg4 61. Kd5 Ka3 62. Bd3 Rh4 63. Rb8 Rb4 64. Rg8 Kb3 65. Rg3 Kc3 66. Bc4+ Kd2 67. Kd4 Rb8 68. Rg2+ Ke1 69. Bd3 Kd1 70. Ke3 Re8+ 71. Be4 Kc1 72. Rc2+ Kd1 73. Rb2 Rc8 74. Rb1+ Rc1 75. Rb2 Rc8 76. Bg6 Rc3+ 77. Bd3 Rc8 78. Rh2 1-0

[Event "US Open-57"]
[Site "Oklahoma"]
[Date "1956.??.??"]
[Round "6"]
[White "Nowak, John"]
[Black "Lapiken, Peter Petrovich"]
[Result "0-1"]
[ECO "D09"]
[PlyCount "86"]
[EventDate "1956.07.16"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 Bg4 6. Bg2 Qd7 7. a3 a5 8. Bf4 h6 9. 0-0 Bc5 10. Nbd2 g5 11. Ne4 Be7 12. Bc1 Qe6 13. c5 f5 14. exf6 0-0-0 15. Ne1 Nxf6 16. Nxf6 Bxe2 17. Bh3 Bxd1 18. Bxe6+ Kb8 19. Bg4 Bxg4 20. Nxg4 Rdf8 21. Nd3 Rf5 22. b4 axb4 23. axb4 Nxb4 24. Nxb4 h5 25. Ne3 dxe3 26. Bxe3 Bxc5 27. Rfb1 Bxe3 28. Nc6+ Kc8 29. Ne7+ Kd7 30. Nxf5 Bb6 31. Rd1+ Ke6 32. Nd4+ Bxd4 33. Rxd4 c5 34. Rdd1 Rc8 35. Ra7 Rc7 36. Rb1 Kd5 37. Raxb7 Rc6 38. Rc1 c4 39. Rb5+ Kd4 40. Rxg5 c3 41. Rxh5 Kd3 42. Rd5+ Ke4 43. Rcd1 c2 0-1

[Event "US Open-56"]
[Site "Long Beach"]
[Date "1955.08.18"]
[Round "10"]
[White "Lapiken, Peter Petrovich"]
[Black "Wallace, Charles"]
[Result "0-1"]
[ECO "C56"]
[PlyCount "110"]
[EventDate "1955.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. e5 d5 6. Bb5 Ne4 7. 0-0 Bc5 8. Nxd4 Qh4 9. g3 Nxg3 10. Nxc6 Nxf1 11. Qxf1 bxc6 12. Bxc6+ Ke7 13. Qg2 Bg4 14. Bxa8 Rxa8 15. Nc3 c6 16. Na4 Bd4 17. Bf4 a6 18. Rd1 Bxf2+ 19. Kh1 Qh3 20. Rd3 Qxg2+ 21. Kxg2 Ba7 22. Rc3 Rc8 23. Rb3 Rb8 24. Rxb8 Bxb8 25. Nc5 Bc8 26. b4 Bc7 27. Be3 f6 28. Bd4 Bb8 29. exf6+ gxf6 30. Bf2 Be5 31. Nd3 Bc3 32. a3 Bf5 33. Nc5 Bxc2 34. Nxa6 d4 35. b5 cxb5 36. Nb4 Bxb4 37. axb4 d3 38. Be1 Ke6 39. Kf3 Kf5 40. Bc3 Kg5 41. Be1 f5 42. Bg3 Kf6 43. Bf4 Ke6 44. Ke3 Kd5 45. Bg3 Kc4 46. Be1 Kb3 47. Bd2 Bb1 48. Kf2 Kc2 49. Ke1 Ba2 50. h4 Bd5 51. h5 Kb3 52. h6 Kc4 53. Kf2 f4 54. Bxf4 Kxb4 55. Ke3 Kc3 0-1

[Event "US Open-56"]
[Site "Long Beach"]
[Date "1955.08.17"]
[Round "9"]
[White "Romanenko, Ivan1"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "C61"]
[PlyCount "97"]
[EventDate "1955.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. 0-0 Ne7 6. d3 g6 7. Bc4 Bg7 8. Bf4 0-0 9. Qd2 d5 10. exd5 Nxd5 11. Bxd5 Qxd5 12. Bxc7 Bd7 13. Na3 Rac8 14. Bf4 Bc6 15. f3 Qh5 16. Nc4 Rfd8 17. Nd6 Ra8 18. Ne4 Qb5 19. a4 Qd5 20. Bg5 Rd7 21. Bf6 h6 22. Bxg7 Kxg7 23. b4 b6 24. b5 Bb7 25. Qf4 f5 26. Nd2 Re7 27. Rfe1 Rae8 28. Rxe7+ Rxe7 29. Nb3 Kh7 30. Qxd4 Qe6 31. Qf2 g5 32. Kf1 Qd6 33. Re1 Rf7 34. Kg1 Bd5 35. Qd4 Qd7 36. c4 Bb7 37. Qxd7 Rxd7 38. d4 Kg7 39. Re6 Rc7 40. Re5 Kf6 41. c5 bxc5 42. Nxc5 Bc8 43. Kf2 f4 44. Ke2 Bf5 45. Kd2 Kg6 46. Kc3 Kf6 47. Kb4 h5 48. a5 Rg7 49. b6 1-0

[Event "US Open-56"]
[Site "Long Beach"]
[Date "1955.08.16"]
[Round "8"]
[White "Lapiken, Peter Petrovich"]
[Black "Sherwin, James T"]
[Result "0-1"]
[ECO "B76"]
[PlyCount "110"]
[EventDate "1955.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 0-0 8. Qd2 Nc6 9. 0-0-0 Nxd4 10. Bxd4 Qa5 11. Kb1 e5 12. Be3 Be6 13. Be2 Rfc8 14. a3 Rd8 15. Bg5 Qc5 16. g4 a6 17. h4 b5 18. h5 Rab8 19. b4 Qc6 20. Bxf6 Bxf6 21. hxg6 hxg6 22. Nd5 Bxd5 23. exd5 Qc7 24. Bd3 a5 25. Be4 axb4 26. axb4 Ra8 27. Kb2 Rdc8 28. Ra1 Qc4 29. c3 Ra4 30. Qd3 Qxd3 31. Bxd3 Rxa1 32. Rxa1 Rxc3 33. Be4 Rc4 34. Rb1 Bg5 35. Ka2 Bd2 36. Rb3 Bxb4 37. Kb2 Rd4 38. Rd3 Rc4 39. Rb3 Kg7 40. Bd3 Rf4 41. Bxb5 Bc5 42. Kc2 Kh6 43. Be2 Kg5 44. Rc3 Kh4 45. Rc4 Rxc4+ 46. Bxc4 e4 47. Be2 e3 48. Kd3 Kg3 49. Bd1 Kf2 50. Be2 Ke1 51. f4 f5 52. gxf5 gxf5 53. Bh5 Kf2 54. Bd1 Bb6 55. Bh5 Bd8 0-1

[Event "US Open-56"]
[Site "Long Beach"]
[Date "1955.08.15"]
[Round "7"]
[White "Hearst, Eliot Sanford"]
[Black "Lapiken, Peter Petrovich"]
[Result "0-1"]
[ECO "A16"]
[PlyCount "73"]
[EventDate "1955.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. e4 Bg7 4. e5 Ng8 5. Nf3 d6 6. exd6 exd6 7. d4 Ne7 8. Be2 0-0 9. Bg5 Nbc6 10. d5 Ne5 11. Nxe5 Bxe5 12. Qd2 Bg7 13. 0-0-0 a6 14. g4 Bd7 15. h4 b5 16. Bh6 f6 17. c5 dxc5 18. Ne4 c6 19. h5 g5 20. Bxg5 fxg5 21. h6 Be5 22. Qxg5+ Ng6 23. Qh5 Qe7 24. g5 Bf4+ 25. Kb1 Qxe4+ 26. Bd3 Qxd3+ 27. Rxd3 Bf5 28. Ka1 Bxd3 29. dxc6 Be5 30. f4 Rxf4 31. Qh3 Bf5 32. Qb3+ c4 33. Qe3 Re8 34. Qc5 Rd4 35. a4 Rd2 36. Rb1 Bxb1 37. Qg1 0-1

[Event "US Open-56"]
[Site "Long Beach"]
[Date "1955.08.13"]
[Round "6"]
[White "Lapiken, Peter Petrovich"]
[Black "Rossolimo, Nicolas"]
[Result "1/2-1/2"]
[ECO "B68"]
[PlyCount "98"]
[EventDate "1955.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. 0-0-0 Bd7 9. f4 Be7 10. Be2 Qc7 11. g4 h6 12. Bxf6 Bxf6 13. Nb3 g5 14. e5 dxe5 15. f5 0-0-0 16. Ne4 Be7 17. f6 Bf8 18. Qe3 Nb4 19. c3 Nd5 20. Qa7 Qb6 21. Qxb6 Nxb6 22. Na5 Kc7 23. Rd2 Bc8 24. Rhd1 Rxd2 25. Rxd2 Rg8 26. b4 Nd5 27. Nc4 Bd7 28. Nxe5 Be8 29. a3 Nb6 30. c4 Nd7 31. Nxd7 Bxd7 32. c5 Bc6 33. Ng3 a5 34. Kb2 axb4 35. axb4 b6 36. Rc2 bxc5 37. bxc5 h5 38. Ka3 hxg4 39. Bxg4 Bh6 40. Bh5 Ra8+ 41. Kb4 Ra4+ 42. Kc3 Rf4 43. Ra2 Rxf6 44. Ra7+ Bb7 45. Ne4 Rf5 46. Rxb7+ Kxb7 47. Nd6+ Kc6 48. Nxf5 exf5 49. Bxf7 Kxc5 1/2-1/2

[Event "US Open-56"]
[Site "Long Beach"]
[Date "1955.08.12"]
[Round "5"]
[White "Rivise, Irving"]
[Black "Lapiken, Peter Petrovich"]
[Result "1/2-1/2"]
[ECO "C86"]
[PlyCount "90"]
[EventDate "1955.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Qe2 b5 7. Bb3 0-0 8. c3 d5 9. d3 Bg4 10. h3 Bxf3 11. Qxf3 d4 12. Qe2 Na5 13. Bc2 c5 14. Nd2 Qc7 15. Nf3 Nd7 16. Bd2 dxc3 17. bxc3 Rfd8 18. Rac1 Nf8 19. Be3 Ne6 20. Rfd1 Bf6 21. Nh2 h6 22. Qg4 Bg5 23. Nf1 Rd7 24. Bxg5 hxg5 25. Ne3 Qd8 26. g3 g6 27. Kg2 Kg7 28. Rh1 c4 29. dxc4 Nxc4 30. Nxc4 bxc4 31. Ba4 Rd2 32. Rhd1 Rb8 33. Rxd2 Qxd2 34. Rc2 Qd3 35. Qe2 Rb1 36. Bc6 Re1 37. Qxe1 Qxc2 38. Qe3 Qd3 39. Qxd3 cxd3 40. Kf3 Nc5 41. Ke3 f5 42. f3 f4+ 43. gxf4 gxf4+ 44. Kd2 Kh6 45. Bd5 Kg5 1/2-1/2

[Event "US Open-56"]
[Site "Long Beach"]
[Date "1955.08.11"]
[Round "4"]
[White "Lapiken, Peter Petrovich"]
[Black "Reshevsky, Samuel Herman"]
[Result "1/2-1/2"]
[ECO "B76"]
[PlyCount "98"]
[EventDate "1955.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 0-0 8. Qd2 a6 9. 0-0-0 b5 10. a3 Bb7 11. g4 Nc6 12. h4 h5 13. gxh5 Nxh5 14. Rg1 Kh7 15. Kb1 Qc8 16. Nd5 Nxd4 17. Bxd4 Bxd5 18. Bxg7 Ba2+ 19. Kxa2 Qe6+ 20. Kb1 Kxg7 21. Be2 Rh8 22. Rg5 Qf6 23. Rdg1 e5 24. R1g4 Nf4 25. Bf1 Rxh4 26. Rxh4 Qxg5 27. Rh1 Ne6 28. Qd5 Rd8 29. Qb7 Qe3 30. Bd3 Nc5 31. Qe7 Qxf3 32. Rf1 Rd7 33. Qh4 Qh5 34. Qf6+ Kg8 35. b4 Ne6 36. c4 Nf4 37. Bc2 bxc4 38. Ba4 c3 39. Rc1 Ne2 40. Bxd7 Nxc1 41. Be8 Ne2 42. Qxf7+ Kh8 43. Qxg6 Qh1+ 44. Ka2 Nc1+ 45. Kb1 Nb3+ 46. Ka2 Nc1+ 47. Kb1 Nb3+ 48. Ka2 Nc1+ 49. Kb1 Ne2+ 1/2-1/2

[Event "US Open-56"]
[Site "Long Beach"]
[Date "1955.08.10"]
[Round "3"]
[White "Gross, Ronald Joseph"]
[Black "Lapiken, Peter Petrovich"]
[Result "0-1"]
[ECO "E70"]
[PlyCount "48"]
[EventDate "1955.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bg5 0-0 6. Qd2 Ne8 7. f4 f6 8. Bh4 Bh6 9. Nf3 Ng7 10. Be2 Nh5 11. g3 c6 12. 0-0 Bg4 13. Ne1 Bxe2 14. Nxe2 Qc8 15. Kg2 e5 16. h3 exf4 17. gxf4 Qe6 18. Qd3 Re8 19. e5 dxe5 20. f5 e4 21. Qb3 gxf5 22. Qxb7 Nd7 23. d5 cxd5 24. cxd5 Qf7 0-1

[Event "US Open-56"]
[Site "Long Beach"]
[Date "1955.08.09"]
[Round "2"]
[White "Lapiken, Peter Petrovich"]
[Black "Hartleb, Glenn E"]
[Result "1-0"]
[ECO "A29"]
[PlyCount "80"]
[EventDate "1955.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. 0-0 Be7 8. d3 Be6 9. Ne4 f5 10. Neg5 Bd5 11. e4 fxe4 12. Nxe4 0-0 13. Be3 Qe8 14. Nc3 Be6 15. Ng5 Bd7 16. Nd5 Nxd5 17. Bxd5+ Kh8 18. Ne6 Bxe6 19. Bxe6 Bg5 20. Bd5 Bxe3 21. fxe3 Rxf1+ 22. Qxf1 Rd8 23. Be4 Qe6 24. a3 Ne7 25. Bxb7 Rb8 26. Be4 Rxb2 27. Qf8+ Ng8 28. Rf1 Qb3 29. Qa8 Rb1 30. Bd5 Rxf1+ 31. Kxf1 Qxd3+ 32. Kf2 Qc2+ 33. Kf3 Qf5+ 34. Kg2 Qc2+ 35. Kh3 Qf5+ 36. g4 Qf1+ 37. Kg3 Qg1+ 38. Kf3 Qd1+ 39. Ke4 Qxg4+ 40. Kd3 Qd1+ 1-0

[Event "US Open-56"]
[Site "Long Beach"]
[Date "1955.08.08"]
[Round "1"]
[White "Piatigorsky, Jacqueline"]
[Black "Lapiken, Peter Petrovich"]
[Result "0-1"]
[ECO "C47"]
[PlyCount "94"]
[EventDate "1955.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 Bxc3+ 7. bxc3 bxc6 8. Bd3 d6 9. Bg5 h6 10. Bh4 Qe7 11. 0-0 Qe5 12. Qe1 Ng4 13. Bg3 Qc5 14. h3 Ne5 15. Qd2 0-0 16. Kh1 f5 17. f4 Nc4 18. Qe1 Nb6 19. Bf2 Qa5 20. Bh4 Bd7 21. Rf3 Rae8 22. Re3 g5 23. Rg3 fxe4 24. Bxg5 exd3 25. Bxh6+ Kh7 26. Rg7+ Kxh6 27. Qg3 Qf5 28. Rg4 Qxg4 29. hxg4 d2 30. Rd1 Nc4 31. Qh4+ Kg7 32. Qg5+ Kf7 33. Qh5+ Ke7 34. Qg5+ Rf6 35. Qg7+ Rf7 36. Qg5+ Kf8 37. Kh2 Re1 38. Qh6+ Ke8 39. Qh8+ Rf8 40. Qh5+ Kd8 41. Qh4+ Re7 42. f5 Ne3 43. Rb1 Bc8 44. f6 Nxg4+ 45. Kg3 Rxf6 46. Qh8+ Re8 47. Qh1 Re3+ 0-1

[Event "Pan American-ch02"]
[Site "Los Angeles"]
[Date "1954.07.26"]
[Round "14"]
[White "Lapiken, Peter Petrovich"]
[Black "Kaufman, Allen J"]
[Result "1-0"]
[ECO "B88"]
[PlyCount "109"]
[EventDate "1954.07.10"]
[EventType "swiss"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. a4 Be7 8. Bb3 Nc6 9. 0-0 Qc7 10. Be3 0-0 11. f4 Bd7 12. f5 e5 13. Nxc6 Bxc6 14. Qf3 b6 15. Rad1 Rac8 16. Rf2 Qb7 17. Nd5 Bxd5 18. Bxd5 Nxd5 19. Rxd5 Rc4 20. b3 Rc3 21. Rfd2 Rfc8 22. Qf2 Qc6 23. Bxb6 Bg5 24. Re2 Be7 25. Kf1 Kf8 26. Rdd2 Bg5 27. Rd1 Ke7 28. Ba5 Rxc2 29. Bb4 Rxe2 30. Qxe2 Rd8 31. g3 Qb6 32. Qc4 Rd7 33. a5 Qb7 34. Rd3 Bh6 35. Ke2 Bg5 36. Kf3 g6 37. Rd5 Bf6 38. g4 h6 39. fxg6 fxg6 40. g5 hxg5 41. Kg4 Rd8 42. Kg3 Rd7 43. h3 Qb8 44. Kg2 Qb7 45. Ba3 Rd8 46. Kf1 Bg7 47. Ke2 Bf6 48. Ke1 Bg7 49. Ke2 Qa7 50. Qc6 Kf7 51. Bxd6 Qd7 52. Qxd7+ Rxd7 53. Bc5 Rxd5 54. exd5 Kf6 55. b4 1-0

[Event "Pan American-ch02"]
[Site "Los Angeles"]
[Date "1954.07.24"]
[Round "13"]
[White "Lapiken, Peter Petrovich"]
[Black "Jacobs, Ron"]
[Result "1-0"]
[ECO "B00"]
[PlyCount "101"]
[EventDate "1954.07.10"]
[EventType "swiss"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 Nc6 2. d4 e5 3. dxe5 Nxe5 4. f4 Ng6 5. Nf3 Bc5 6. Bc4 d6 7. f5 Ne5 8. Qe2 Nxf3+ 9. Qxf3 Bd7 10. Nc3 Bc6 11. Qh5 Qe7 12. Bg5 Nf6 13. Qh4 0-0-0 14. 0-0-0 h6 15. Bxf6 gxf6 16. a3 Rdg8 17. g3 h5 18. Rhe1 Rg4 19. Qh3 Rh7 20. Be2 Rg5 21. g4 h4 22. Qd3 h3 23. b4 Bf2 24. Rf1 Bb6 25. a4 d5 26. exd5 Bd7 27. Qc4 Rh4 28. d6 Qe3+ 29. Rd2 c6 30. a5 Bd8 31. Rf3 Rgxg4 32. Rxe3 Rxc4 33. Bxc4 Rxc4 34. Na2 Bxf5 35. c3 Be6 36. d7+ Bxd7 37. Red3 f5 38. Rxd7 Bg5 39. Kc2 Bxd2 40. Rxd2 Rg4 41. Nc1 c5 42. Nd3 cxb4 43. cxb4 b6 44. axb6 axb6 45. Kc3 Kc7 46. Nf2 Rf4 47. Nxh3 Rh4 48. Ng5 b5 49. Nf3 Rc4+ 50. Kb3 Re4 51. Rd3 1-0

[Event "Pan American-ch02"]
[Site "Los Angeles"]
[Date "1954.07.23"]
[Round "12"]
[White "Pafnutieff, Vladimir"]
[Black "Lapiken, Peter Petrovich"]
[Result "1/2-1/2"]
[ECO "C01"]
[PlyCount "36"]
[EventDate "1954.07.10"]
[EventType "swiss"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 e6 2. e4 d5 3. Nc3 Bb4 4. exd5 exd5 5. Bd3 Ne7 6. Nge2 Nbc6 7. 0-0 Bf5 8. Bf4 Bxd3 9. Qxd3 Bd6 10. Bxd6 Qxd6 11. h3 0-0 12. Ng3 a6 13. Rfe1 Rfe8 14. Rad1 Ng6 15. Qd2 Rxe1+ 16. Rxe1 Qf4 17. Qxf4 Nxf4 18. Nce2 Nxe2+ 1/2-1/2

[Event "Pan American-ch02"]
[Site "Los Angeles"]
[Date "1954.07.21"]
[Round "10"]
[White "Kaiser, William E"]
[Black "Lapiken, Peter Petrovich"]
[Result "0-1"]
[ECO "C86"]
[PlyCount "80"]
[EventDate "1954.07.10"]
[EventType "swiss"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Qe2 b5 7. Bb3 0-0 8. c3 d5 9. d3 dxe4 10. dxe4 Bd6 11. Rd1 Qe7 12. Nbd2 Na5 13. Bc2 Be6 14. b3 Nd7 15. Nf1 Nb6 16. Ne3 g6 17. Nd5 Nxd5 18. exd5 Bd7 19. Bh6 Rfe8 20. Ng5 f5 21. f3 Nb7 22. b4 Nd8 23. Qd2 f4 24. g4 Nf7 25. Nxf7 Kxf7 26. g5 a5 27. bxa5 Rxa5 28. c4 Bb4 29. Qe2 bxc4 30. Qxc4 Qc5+ 31. Qxc5 Bxc5+ 32. Kg2 Bd4 33. Bb3 Bxa1 34. Rxa1 Ba4 35. Bc4 Rc5 36. Bd3 Rb8 37. Re1 Rb2+ 38. Kg1 Rxa2 39. Bf1 Bb5 40. Bh3 Rxd5 0-1

[Event "Pan American-ch02"]
[Site "Los Angeles"]
[Date "1954.07.18"]
[Round "8"]
[White "Lapiken, Peter Petrovich"]
[Black "McCormick, Edgar Thomas"]
[Result "1-0"]
[ECO "B01"]
[PlyCount "91"]
[EventDate "1954.07.10"]
[EventType "swiss"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. d4 c6 4. dxc6 Nxc6 5. Nf3 Bg4 6. c3 e5 7. Be2 exd4 8. Nxd4 Nxd4 9. Bxg4 Nxg4 10. Qxd4 Qxd4 11. cxd4 0-0-0 12. 0-0 Rxd4 13. h3 Ne5 14. Be3 Rb4 15. a3 Rxb2 16. Bd4 Rb5 17. a4 Ra5 18. Nc3 Bb4 19. Nb5 Nc6 20. Bxg7 Rg8 21. Bc3 Rd8 22. Bxb4 Nxb4 23. Rfc1+ Nc6 24. Rc4 Rd3 25. Rac1 Kd7 26. Rf4 Ke7 27. Re1+ Kf8 28. Nc7 Nd4 29. Re8+ Kg7 30. Ree4 Nc6 31. Rg4+ Kh6 32. Nb5 a6 33. Rg8 Rd5 34. Rf4 Ne7 35. Rf6+ Ng6 36. Nd6 Kg5 37. Ne4+ Kh6 38. Rxf7 Rxa4 39. Nf6 Rd2 40. Rxh7+ Kg5 41. Ng4 Rd6 42. Rxb7 Kf5 43. Rf7+ Kg5 44. g3 Rxg4 45. hxg4 Kxg4 46. Kg2 1-0

[Event "Pan American-ch02"]
[Site "Los Angeles"]
[Date "1954.07.17"]
[Round "7"]
[White "Meyer, Peter3"]
[Black "Lapiken, Peter Petrovich"]
[Result "0-1"]
[ECO "E20"]
[PlyCount "34"]
[EventDate "1954.07.10"]
[EventType "swiss"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. Qa4+ Nc6 6. a3 Bxc3+ 7. bxc3 0-0 8. e3 e5 9. cxd5 Nxd5 10. Qc2 exd4 11. cxd4 Re8 12. Kf2 Qh4+ 13. g3 Qf6 14. Bd3 Nxd4 15. Qb2 Nxe3 16. Bxe3 Rxe3 17. Be4 Rxe4 0-1

[Event "Pan American-ch02"]
[Site "Los Angeles"]
[Date "1954.07.13"]
[Round "3"]
[White "Madrid, Bernard"]
[Black "Lapiken, Peter Petrovich"]
[Result "0-1"]
[ECO "E20"]
[PlyCount "44"]
[EventDate "1954.07.10"]
[EventType "swiss"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3 Nc6 5. Bg2 Bxc3+ 6. bxc3 Na5 7. Qa4 c6 8. Ba3 d5 9. cxd5 exd5 10. Nf3 Ne4 11. Rc1 b5 12. Qb4 Nc4 13. Ne5 a5 14. Qb3 Ned6 15. Qc2 Nxe5 16. dxe5 Nc4 17. Bc5 Qc7 18. f4 Nb6 19. 0-0 g6 20. e4 Bb7 21. Bh3 Na4 22. Bd6 Qb6+ 0-1

[Event "Pan American-ch02"]
[Site "Los Angeles"]
[Date "1954.07.11"]
[Round "2"]
[White "Lapiken, Peter Petrovich"]
[Black "Grover, Kenneth"]
[Result "1-0"]
[ECO "A10"]
[PlyCount "91"]
[EventDate "1954.07.10"]
[EventType "swiss"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. c4 e6 2. Nc3 f5 3. g3 Nf6 4. Bg2 Nc6 5. e4 fxe4 6. Nxe4 Be7 7. Ne2 0-0 8. 0-0 Ne5 9. Qc2 d5 10. Nxf6+ Bxf6 11. cxd5 exd5 12. d4 Ng6 13. a4 c6 14. b4 a6 15. Bb2 Be7 16. b5 Bf5 17. Qb3 Qb6 18. Nc3 Bf6 19. a5 Qd8 20. bxc6 bxc6 21. Na4 Re8 22. Nb6 Ra7 23. Rac1 Rc7 24. Rc5 Be4 25. Bxe4 Rxe4 26. Nxd5 Rf7 27. Nxf6+ Qxf6 28. d5 Qf5 29. Rxc6 Nh4 30. gxh4 h5 31. f3 Qh3 32. Rc8+ Qxc8 33. fxe4 Qg4+ 34. Qg3 Rxf1+ 35. Kxf1 Qd1+ 36. Kf2 Qd2+ 37. Kf3 Qxb2 38. Qc7 Qa3+ 39. Kf4 Qf8+ 40. Ke3 Qa3+ 41. Kd4 Qb4+ 42. Ke5 Qb2+ 43. Ke6 Qf6+ 44. Kd7 Qd4 45. Qc6 Qa7+ 46. Kc8 1-0

[Event "Pan American-ch02"]
[Site "Los Angeles"]
[Date "1954.07.10"]
[Round "1"]
[White "Rivise, Irving"]
[Black "Lapiken, Peter Petrovich"]
[Result "1-0"]
[ECO "C86"]
[PlyCount "73"]
[EventDate "1954.07.10"]
[EventType "swiss"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Qe2 b5 7. Bb3 0-0 8. c3 d6 9. a4 Bg4 10. Rd1 Na5 11. Bc2 c6 12. d4 Qc7 13. Nbd2 Nd7 14. h3 Be6 15. b4 Nc4 16. Nf1 d5 17. dxe5 Ndxe5 18. Ne3 dxe4 19. Bxe4 Nxe3 20. Bxe3 f5 21. Bb1 Bc4 22. Ba2 Bxa2 23. Qxa2+ Kh8 24. Nxe5 Qxe5 25. Bd4 Qc7 26. axb5 cxb5 27. Qe6 Qb7 28. Bxg7+ Kxg7 29. Rd7 Qe4 30. Rxe7+ Kh8 31. Qd7 Qh4 32. Rd1 Rac8 33. g3 Qh6 34. Rd6 Qxh3 35. Qe6 Qg4 36. Rdd7 Qg6 37. Qxg6 1-0

