[Event "World U20-ch20"]
[Site "Mexico City"]
[Date "1981.09.02"]
[Round "13"]
[White "Kumar Singh, Promod"]
[Black "Castaneda, Blas"]
[Result "1/2-1/2"]
[ECO "B49"]
[PlyCount "109"]
[EventDate "1981.08.18"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "MEX"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 6. Be2 Qc7 7. 0-0 Nf6 8. Be3 Bb4 9. Bd3 0-0 10. Kh1 d5 11. exd5 Nxd4 12. Bxd4 e5 13. Be3 Bxc3 14. bxc3 Qxc3 15. Bg5 Nxd5 16. Bxh7+ Kxh7 17. Qxd5 Qd4 18. Qb3 Be6 19. Qg3 f6 20. Be3 Qg4 21. Qxg4 Bxg4 22. c4 Be2 23. Rfc1 Rac8 24. c5 Bb5 25. Kg1 Rfd8 26. Rd1 Rxd1+ 27. Rxd1 Kg6 28. f3 Rh8 29. Rd6 Rh4 30. Rb6 Bc6 31. a3 Rc4 32. Rb3 Rc2 33. h3 f5 34. Bf2 Rd2 35. Be1 Rd1 36. Kf2 Bb5 37. Re3 Kf6 38. g3 Rd5 39. Bc3 Ke6 40. f4 e4 41. Bxg7 Rxc5 42. g4 Rd5 43. Kg3 Rd3 44. Rxd3 exd3 45. Bc3 Kd5 46. gxf5 Bd7 47. Kg4 Ke4 48. Kg5 Bxf5 49. h4 b5 50. h5 Bh7 51. h6 Bf5 52. Ba5 Bh7 53. Bd2 Bf5 54. Kf6 a5 55. Bxa5 1/2-1/2

[Event "World U20-ch20"]
[Site "Mexico City"]
[Date "1981.08.31"]
[Round "12"]
[White "Noble, Mark Frederick"]
[Black "Kumar Singh, Promod"]
[Result "0-1"]
[ECO "A13"]
[PlyCount "58"]
[EventDate "1981.08.18"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "MEX"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. e3 e6 4. b3 Nc6 5. Bb2 d5 6. c4 cxd4 7. exd4 Be7 8. Be2 0-0 9. 0-0 dxc4 10. Bxc4 b6 11. Nbd2 Bb7 12. Re1 Nd5 13. Nf1 Bb4 14. N3d2 Bc3 15. Bxc3 Nxc3 16. Qc1 Qxd4 17. Re3 Nd5 18. Rd3 Qg4 19. Bxd5 exd5 20. Ne3 Qe2 21. Rxd5 Nb4 22. Rg5 Nd3 23. Qc3 f6 24. Nf5 Qxf2+ 25. Kh1 Bxg2+ 26. Rxg2 Qxf5 27. Rf1 Qd5 28. Rxf6 Rxf6 29. Qxf6 Qxg2+ 0-1

[Event "World U20-ch20"]
[Site "Mexico City"]
[Date "1981.08.30"]
[Round "11"]
[White "Heaven, Peter"]
[Black "Kumar Singh, Promod"]
[Result "1/2-1/2"]
[ECO "B48"]
[PlyCount "85"]
[EventDate "1981.08.18"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "MEX"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Qc7 6. Be3 e6 7. Bd3 a6 8. 0-0 b5 9. a3 Bb7 10. Qe2 Be7 11. f4 d6 12. Kh1 0-0 13. Rf3 Nxd4 14. Bxd4 e5 15. Be3 exf4 16. Rxf4 Nd7 17. Nd5 Bxd5 18. exd5 Ne5 19. Bd4 g6 20. g4 Rac8 21. Be4 Qc4 22. Qxc4 Rxc4 23. Rd1 Bg5 24. Rff1 Nxg4 25. b3 Rxd4 26. Rxd4 Be3 27. Rd3 Nf2+ 28. Kg2 Nxd3 29. Bxd3 f5 30. a4 bxa4 31. bxa4 a5 32. Rb1 Kg7 33. Rb7+ Rf7 34. Rxf7+ Kxf7 35. Kf3 Bd4 36. Bb5 Kf6 37. h3 Kg5 38. Bd7 Kh4 39. Kg2 h5 40. Bc8 g5 41. Bd7 f4 42. Kf3 Be5 43. c4 1/2-1/2

[Event "World U20-ch20"]
[Site "Mexico City"]
[Date "1981.08.29"]
[Round "10"]
[White "Kumar Singh, Promod"]
[Black "Waqar, Mohamed"]
[Result "1-0"]
[ECO "C78"]
[PlyCount "39"]
[EventDate "1981.08.18"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "MEX"]
[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 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Bc5 7. c3 Bb6 8. d4 Qe7 9. Bd5 Ng4 10. h3 h5 11. hxg4 hxg4 12. Ng5 g3 13. Qg4 gxf2+ 14. Rxf2 Nxd4 15. Bxf7+ Kf8 16. Bd5+ Ke8 17. cxd4 Bxd4 18. Nh7 d6 19. Qg6+ Kd7 20. Bg5 1-0

[Event "World U20-ch20"]
[Site "Mexico City"]
[Date "1981.08.27"]
[Round "9"]
[White "Fonseca, Jose Luis"]
[Black "Kumar Singh, Promod"]
[Result "1-0"]
[ECO "B49"]
[PlyCount "79"]
[EventDate "1981.08.18"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "MEX"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Qc7 6. Be2 e6 7. a3 a6 8. Be3 b5 9. 0-0 Bb7 10. f4 Bc5 11. e5 Qb6 12. exf6 Nxd4 13. Kh1 Nxe2 14. Bxc5 Qxc5 15. Qxe2 gxf6 16. Ne4 Qd4 17. Nc3 Rg8 18. Rf2 f5 19. Rd1 Qc5 20. Rd3 Ke7 21. b4 Qc4 22. Qe5 Ke8 23. Kg1 Rc8 24. Rfd2 Qc7 25. Qe3 Qc6 26. Nd5 Kf8 27. Rc3 exd5 28. Rxc6 Bxc6 29. Qe5 Re8 30. Qxf5 Rg6 31. Qh5 d4 32. Qxh7 Re1+ 33. Kf2 Ra1 34. Qh8+ Rg8 35. Qh6+ Ke8 36. g3 Rxa3 37. Rxd4 Rg6 38. Qh8+ Ke7 39. Rd3 Rxd3 40. cxd3 1-0

[Event "World U20-ch20"]
[Site "Mexico City"]
[Date "1981.08.26"]
[Round "8"]
[White "Kumar Singh, Promod"]
[Black "Rodriguez, Rogerio"]
[Result "0-1"]
[ECO "B32"]
[PlyCount "36"]
[EventDate "1981.08.18"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "MEX"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 a6 6. Nd6+ Bxd6 7. Qxd6 Qf6 8. Qd3 Nge7 9. Be3 d5 10. exd5 Nb4 11. Qd2 Nexd5 12. Bc5 Qh4 13. Na3 Bf5 14. c3 Qe4+ 15. Be2 Nf4 16. cxb4 Nxg2+ 17. Kf1 Ne3+ 18. fxe3 Bh3+ 0-1

[Event "World U20-ch20"]
[Site "Mexico City"]
[Date "1981.08.23"]
[Round "6"]
[White "Kumar Singh, Promod"]
[Black "Krewi, Nasser"]
[Result "0-1"]
[ECO "B06"]
[PlyCount "66"]
[EventDate "1981.08.18"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "MEX"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 c6 5. Nf3 Bg4 6. Be3 Qb6 7. Qd2 Bxf3 8. gxf3 Qc7 9. 0-0-0 Nd7 10. Rg1 e6 11. f5 exf5 12. exf5 0-0-0 13. h4 Ne7 14. Bd3 Rdg8 15. fxg6 hxg6 16. Rh1 Nb6 17. Kb1 Nbd5 18. Nxd5 Nxd5 19. Bf2 Bh6 20. Qe1 Re8 21. Qf1 Ne3 22. Qh3+ Qd7 23. Qxd7+ Kxd7 24. Rde1 Ng2 25. Rxe8 Rxe8 26. h5 gxh5 27. Rxh5 Be3 28. Bf5+ Kc7 29. Bg3 Bxd4 30. Rh7 Re7 31. Bg6 Be5 32. Bf2 Nf4 33. Rxf7 Nxg6 0-1

[Event "World U20-ch20"]
[Site "Mexico City"]
[Date "1981.08.22"]
[Round "5"]
[White "Kumar Singh, Promod"]
[Black "Cools, Gorik"]
[Result "0-1"]
[ECO "C80"]
[PlyCount "84"]
[EventDate "1981.08.18"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "MEX"]
[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 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2 Nc5 10. c3 d4 11. cxd4 Nxd4 12. Nxd4 Qxd4 13. Bxe6 Nxe6 14. Qf3 Rd8 15. Qc6+ Qd7 16. Qxa6 Bb4 17. Qb7 Bxd2 18. Rd1 Qd5 19. Qxd5 Rxd5 20. Bxd2 Rxe5 21. Be3 Ke7 22. Kf1 Ra8 23. a3 c5 24. Bd2 Rh5 25. h3 Rd5 26. Bc3 Rad8 27. Rxd5 Rxd5 28. g3 Kd6 29. Ke2 f6 30. b3 Kc6 31. Ra2 Ng5 32. h4 Ne4 33. Be1 Re5 34. Kf1 Nd6 35. a4 b4 36. Rc2 Kb6 37. Bd2 Nb7 38. Bf4 Re7 39. f3 h6 40. Rd2 g5 41. Bd6 Rd7 42. a5+ Kc6 0-1

[Event "World U20-ch20"]
[Site "Mexico City"]
[Date "1981.08.21"]
[Round "4"]
[White "Bernal Moro, Luis Javier"]
[Black "Kumar Singh, Promod"]
[Result "0-1"]
[ECO "A29"]
[PlyCount "134"]
[EventDate "1981.08.18"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "MEX"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[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 0-0 9. a4 a5 10. Be3 Be6 11. d4 exd4 12. Nxd4 Nxd4 13. Bxd4 c6 14. Ne4 Bd5 15. Bc3 Nd7 16. Qd3 Qc7 17. Rfd1 Rfd8 18. Qf3 Nf6 19. Qe3 Re8 20. Bxf6 Bxe4 21. Bxe7 Bxg2 22. Bd6 Qc8 23. Be5 Qf5 24. Kxg2 Rxe5 25. Qf3 Qe6 26. Rd2 Re8 27. Rad1 h6 28. e3 Rf5 29. Rd6 Rxf3 30. Rxe6 Rxf2+ 31. Kxf2 Rxe6 32. Kf3 b5 33. Rc1 Rd6 34. Rc5 bxa4 35. Rxa5 Rd2 36. Rxa4 Rxb2 37. Rc4 Rb6 38. g4 Kf8 39. h4 Ke7 40. Kf4 Kd6 41. Rd4+ Kc7 42. Rc4 Rb5 43. Ke4 Kd6 44. Rd4+ Rd5 45. Ra4 Re5+ 46. Kf3 Re7 47. Rd4+ Kc7 48. Rc4 Kb6 49. Rc1 c5 50. Rb1+ Kc6 51. Rc1 Kd5 52. Rd1+ Ke5 53. Rc1 Rc7 54. Ke2 c4 55. Kd2 c3+ 56. Kc2 Ke4 57. Re1 Kf3 58. e4 f6 59. g5 hxg5 60. hxg5 fxg5 61. e5 g4 62. e6 Re7 63. Rf1+ Kg2 64. Rf7 Rxe6 65. Rxg7 g3 66. Kxc3 Rd6 67. Kc2 Kf2 0-1

[Event "World U20-ch20"]
[Site "Mexico City"]
[Date "1981.08.20"]
[Round "3"]
[White "Lasar, Yves"]
[Black "Kumar Singh, Promod"]
[Result "1-0"]
[ECO "A42"]
[PlyCount "79"]
[EventDate "1981.08.18"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "MEX"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 c6 5. Be3 Qa5 6. Qd2 Nd7 7. Nf3 h5 8. Bd3 Ngf6 9. h3 a6 10. a3 Qc7 11. Rc1 e5 12. dxe5 dxe5 13. c5 0-0 14. Bc4 a5 15. 0-0 a4 16. Rfd1 Ne8 17. Qc2 Qa5 18. Na2 Bf6 19. Nb4 Kg7 20. Ba2 Rh8 21. Qc4 Rf8 22. g4 hxg4 23. hxg4 Be7 24. Kg2 Ndf6 25. Nxe5 Nxg4 26. Nxg4 Bxg4 27. Rh1 Bh5 28. Nd3 Qc7 29. Nf4 Nf6 30. Qxf7+ Rxf7 31. Ne6+ Kh7 32. Nxc7 Raf8 33. Ne6 Nxe4 34. Nxf8+ Rxf8 35. Rxh5+ gxh5 36. Bb1 Bf6 37. Bxe4+ Kh8 38. Rc4 Rg8+ 39. Kh3 Bxb2 40. Rxa4 1-0

[Event "World U20-ch20"]
[Site "Mexico City"]
[Date "1981.08.18"]
[Round "2"]
[White "Kumar Singh, Promod"]
[Black "Siegel, Georg"]
[Result "0-1"]
[ECO "B04"]
[BlackElo "2300"]
[PlyCount "96"]
[EventDate "1981.08.18"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "MEX"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6 cxd6 6. Nc3 g6 7. Be3 Bg7 8. Be2 0-0 9. Nf3 Bf5 10. Rc1 Nc6 11. 0-0 d5 12. b3 dxc4 13. bxc4 Na5 14. Na4 Nbxc4 15. Rxc4 b5 16. Rc3 bxa4 17. Qxa4 Be4 18. Rfc1 Nb7 19. Rc7 Nd6 20. Rxa7 Qb6 21. Rxa8 Rxa8 22. Qb3 Qa5 23. Bc4 Bxf3 24. gxf3 Bxd4 25. Bd5 Bxe3 26. fxe3 Rd8 27. Rd1 Rc8 28. Kf2 Qc7 29. Qd3 Rb8 30. Bb3 Rb4 31. e4 Rb5 32. Kg1 Qc5+ 33. Kg2 Qg5+ 34. Kh1 Qf4 35. Qe2 Rh5 36. a4 Rh3 37. Rf1 Nxe4 38. fxe4 Rxh2+ 39. Qxh2 Qxf1+ 40. Qg1 Qh3+ 41. Qh2 Qxb3 42. Qe5 Qxa4 43. Qb8+ Kg7 44. Qe5+ Kh6 45. Qxe7 Qd1+ 46. Kg2 Qg4+ 47. Kf2 Qf4+ 48. Ke2 Kg7 0-1

[Event "World U20-ch20"]
[Site "Mexico City"]
[Date "1981.08.18"]
[Round "1"]
[White "Tempone, Marcelo"]
[Black "Kumar Singh, Promod"]
[Result "1-0"]
[ECO "A29"]
[WhiteElo "2305"]
[PlyCount "143"]
[EventDate "1981.08.18"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "MEX"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. g3 e5 2. Bg2 d5 3. c4 Nf6 4. cxd5 Nxd5 5. Nc3 Nb6 6. d3 Be7 7. Nf3 Nc6 8. 0-0 0-0 9. Be3 Be6 10. Qc1 Qd7 11. Rd1 Bh3 12. Bh1 f5 13. a3 f4 14. Bxb6 cxb6 15. b4 Rac8 16. Qb2 Nd4 17. Rac1 Nxf3+ 18. Bxf3 Qd4 19. Qb3+ Kh8 20. Ne4 Rc6 21. Rxc6 bxc6 22. Qc4 Qd7 23. Rc1 Rc8 24. Qb3 Bf5 25. a4 c5 26. b5 Be6 27. Qc3 fxg3 28. hxg3 Qd4 29. Kg2 Kg8 30. e3 Qxc3 31. Nxc3 Rd8 32. Be4 g6 33. Nd1 c4 34. dxc4 Ba3 35. Rc3 Bc5 36. Rd3 Rc8 37. Bd5 Kf7 38. Nc3 Bb4 39. Ne4 h6 40. Rd1 Ke7 41. Bxe6 Kxe6 42. Rc1 Kf5 43. Kf3 Rc7 44. g4+ Ke6 45. Ke2 h5 46. gxh5 gxh5 47. Rh1 Rxc4 48. Kd3 Rc7 49. Rxh5 Be7 50. Rh6+ Kf5 51. Rh5+ Ke6 52. Nc3 Bf8 53. Rg5 Rf7 54. Rg6+ Kf5 55. Rc6 Rd7+ 56. Ke2 Bb4 57. e4+ Kg5 58. Nd5 Bd6 59. Kd3 Bc5 60. Re6 Bd6 61. Re8 Rf7 62. Ke2 Rd7 63. Rg8+ Kh4 64. Ne3 Bb4 65. Rg7 Rxg7 66. Nf5+ Kg5 67. Nxg7 Kf6 68. Nf5 Kg5 69. Kd3 Kf4 70. Kc4 Bc5 71. Kd5 Bxf2 72. Ne7 1-0

