[Event "Columbus Cardinal op"]
[Site "Columbus"]
[Date "1988.01.17"]
[Round "4"]
[White "Ivanov, Igor V"]
[Black "Diebert, Charles"]
[Result "1-0"]
[ECO "A51"]
[WhiteElo "2505"]
[PlyCount "85"]
[EventDate "1988.01.15"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. Nf3 Bb4+ 5. Bd2 Nxd2 6. Nbxd2 Nc6 7. a3 Bxd2+ 8. Qxd2 Qe7 9. Qc3 b6 10. e3 Bb7 11. Be2 0-0-0 12. Rc1 Kb8 13. c5 g5 14. 0-0 g4 15. Nd4 Nxe5 16. cxb6 cxb6 17. Nf5 Qf6 18. Qc7+ Ka8 19. Nd6 Rb8 20. Rfd1 Rhg8 21. Nxb7 Rxb7 22. Qd6 Qxd6 23. Rxd6 Kb8 24. Kf1 Rc7 25. Rxc7 Kxc7 26. Rh6 Rg7 27. h3 gxh3 28. Rxh3 d6 29. f4 Nd7 30. g4 Kd8 31. Kf2 Ke7 32. Kf3 Nf8 33. Bd3 f6 34. Bf5 Ng6 35. Ke4 Kd8 36. Kd5 Ke7 37. Bxg6 hxg6 38. Rh8 f5 39. g5 Kd7 40. Ra8 Re7 41. Rxa7+ Ke8 42. Rxe7+ Kxe7 43. a4 1-0

[Event "Columbus Cardinal op"]
[Site "Columbus"]
[Date "1988.01.17"]
[Round "5"]
[White "Karklins, Andrew"]
[Black "Ivanov, Igor V"]
[Result "0-1"]
[ECO "B27"]
[WhiteElo "2300"]
[BlackElo "2505"]
[PlyCount "110"]
[EventDate "1988.01.15"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Qxd4 Nf6 5. e5 Nc6 6. Qa4 Nd5 7. Qb3 e6 8. c4 Nde7 9. Nc3 Nf5 10. Bg5 Nfd4 11. Bxd8 Nxb3 12. Bf6 Nxa1 13. Bxh8 Nc2+ 14. Kd2 N2d4 15. Nxd4 Nxd4 16. Kd3 Nc6 17. Nb5 Rb8 18. Nd6+ Bxd6 19. exd6 f5 20. g4 fxg4 21. h3 g3 22. fxg3 b6 23. Bg2 Nd8 24. Bf6 Ba6 25. b4 Rc8 26. b5 Bb7 27. Bxb7 Nxb7 28. Be7 Kf7 29. Rf1+ Kg7 30. g4 g5 31. Bf6+ Kg8 32. Be7 h6 33. Re1 Kg7 34. Kd4 Rc5 35. Rf1 Na5 36. Rc1 a6 37. bxa6 Nc6+ 38. Ke4 Re5+ 39. Kd3 Ra5 40. Rf1 Rxa6 41. Bf6+ Kg8 42. Bc3 e5 43. Rf2 Ra3 44. Rb2 Kf7 45. Rxb6 Rxa2 46. Bb2 Ke6 47. Rb3 Kxd6 48. Ba3+ Ke6 49. Bf8 Rf2 50. Bc5 Rf3+ 51. Be3 Rxh3 52. Rb1 Rh4 53. Rg1 e4+ 54. Ke2 Rh2+ 55. Bf2 Ne5 0-1

[Event "Columbus Cardinal op"]
[Site "Columbus"]
[Date "1988.01.16"]
[Round "2"]
[White "Ivanov, Igor V"]
[Black "Multhopp, Hans"]
[Result "1-0"]
[ECO "A53"]
[WhiteElo "2505"]
[PlyCount "59"]
[EventDate "1988.01.15"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 d6 3. d4 Bf5 4. g3 c6 5. Bg2 Nbd7 6. 0-0 e5 7. Nc3 h6 8. Nh4 Bh7 9. e4 Be7 10. Be3 0-0 11. Qf3 d5 12. exd5 e4 13. Qe2 g5 14. f3 gxh4 15. fxe4 Kg7 16. d6 Bxd6 17. e5 Nxe5 18. dxe5 Bxe5 19. Bxh6+ Kxh6 20. Qe3+ Kg7 21. Qxe5 Re8 22. Qf4 hxg3 23. Rad1 Qb6+ 24. Kh1 Re6 25. Ne4 Bxe4 26. Bxe4 Rh8 27. Qxg3+ Kf8 28. Qb8+ Ne8 29. Rd7 Re7 30. Rxe7 1-0

[Event "Columbus Cardinal op"]
[Site "Columbus"]
[Date "1988.01.16"]
[Round "3"]
[White "Wheeler, Jerry"]
[Black "Ivanov, Igor V"]
[Result "0-1"]
[ECO "B39"]
[BlackElo "2505"]
[PlyCount "80"]
[EventDate "1988.01.15"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. c4 Nc6 6. Be3 Nf6 7. Nc3 Ng4 8. Qxg4 Nxd4 9. Qd1 Ne6 10. Qd2 Qa5 11. Rc1 b6 12. Bd3 Bb7 13. 0-0 g5 14. Rfd1 d6 15. Nd5 Qxd2 16. Rxd2 Rc8 17. Be2 h5 18. b4 Be5 19. a4 Nf4 20. Bf1 h4 21. f3 Rg8 22. Ra2 e6 23. Nxf4 gxf4 24. Bf2 h3 25. a5 hxg2 26. Bxg2 Bxe4 27. Kh1 Bd3 28. axb6 axb6 29. Bxb6 Ke7 30. c5 Kf6 31. Rd1 Bc4 32. Ra7 d5 33. Bf1 Bxf1 34. Rxf1 Bd4 35. Rb7 Be3 36. Bc7 Rg6 37. Ra7 Rcg8 38. Raa1 Rg2 39. b5 Rc2 40. Ra4 Kf5 0-1

[Event "Columbus Cardinal op"]
[Site "Columbus"]
[Date "1988.01.15"]
[Round "1"]
[White "Steinfeld, Bruce"]
[Black "Ivanov, Igor V"]
[Result "1-0"]
[ECO "E60"]
[BlackElo "2505"]
[PlyCount "167"]
[EventDate "1988.01.15"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. b3 Bg7 4. Bb2 0-0 5. g3 d6 6. d4 Nc6 7. Bg2 e5 8. dxe5 dxe5 9. 0-0 e4 10. Nd4 Nxd4 11. Qxd4 Bf5 12. Qc3 Re8 13. Na3 Qc8 14. Rad1 Bh3 15. Ba1 h5 16. Nc2 h4 17. Ne3 Nh5 18. Qc1 Bh6 19. Qc3 Kh7 20. Nd5 Bg7 21. Qc1 Bxg2 22. Kxg2 c6 23. Bxg7 Kxg7 24. Qc3+ Kg8 25. Ne3 Qe6 26. Qd4 Nf6 27. h3 Re7 28. Qd6 hxg3 29. Qxe6 Rxe6 30. fxg3 Kg7 31. Rd4 c5 32. Rd2 a5 33. a4 Raa6 34. Nd5 Rad6 35. Rfd1 e3 36. Rd3 Nxd5 37. Rxd5 Rb6 38. R1d3 Re4 39. Kf3 Ree6 40. Rxc5 Re7 41. Rd4 Rxb3 42. Rxa5 Rb1 43. Re4 Rc7 44. Rb5 Rc1 45. Kxe3 Rc3+ 46. Kf2 R3xc4 47. Rxc4 Rxc4 48. a5 Ra4 49. h4 Kf6 50. Kf3 Ke6 51. Rb6+ Ke5 52. Rxb7 f5 53. Rb5+ Kf6 54. Rb6+ Kg7 55. Ra6 Ra3+ 56. Kf2 Kh6 57. Ra8 g5 58. hxg5+ Kxg5 59. a6 Kf6 60. a7 Kg7 61. e3 Ra4 62. Kf3 Kh7 63. Rf8 Rxa7 64. Rxf5 Kg6 65. g4 Ra1 66. e4 Rf1+ 67. Ke3 Rg1 68. Kf4 Rf1+ 69. Ke5 Ra1 70. Rf8 Ra5+ 71. Kf4 Ra6 72. g5 Ra1 73. Rf6+ Kg7 74. Rd6 Rf1+ 75. Ke5 Rg1 76. Kf5 Rf1+ 77. Ke6 Kg6 78. Kd7+ Kxg5 79. e5 Ra1 80. e6 Ra7+ 81. Ke8 Kf6 82. e7+ Kg7 83. Rd1 Kf6 84. Kf8 1-0

