[Event "Texas-ch"]
[Site "Dallas"]
[Date "2003.05.26"]
[Round "7"]
[White "Diesen, Mark C"]
[Black "Cole, John W"]
[Result "1/2-1/2"]
[ECO "D91"]
[WhiteElo "2467"]
[BlackElo "2262"]
[PlyCount "23"]
[EventDate "2003.05.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. Bg5 Ne4 6. cxd5 Nxg5 7. Nxg5 e6 8. Qd2 exd5 9. Qe3+ Kf8 10. Qf4 Bf6 11. h4 h6 12. Nxd5 1/2-1/2

[Event "Texas-ch"]
[Site "Dallas"]
[Date "2003.05.26"]
[Round "6"]
[White "Diesen, Mark C"]
[Black "Whatley, Andrew"]
[Result "1-0"]
[ECO "D05"]
[WhiteElo "2467"]
[BlackElo "2340"]
[PlyCount "47"]
[EventDate "2003.05.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. b3 Nc6 6. 0-0 Qc7 7. c4 dxc4 8. bxc4 e5 9. Nc3 Bg4 10. d5 Nb8 11. Nb5 Qd8 12. Qa4 Bd7 13. Nxe5 a6 14. Nxd7 Nbxd7 15. Nc3 g6 16. Rb1 Qb8 17. e4 Bg7 18. f4 0-0 19. e5 Nxe5 20. fxe5 Qxe5 21. Ne2 b5 22. Qb3 bxc4 23. Bxc4 Rab8 24. Bf4 1-0

[Event "Texas-ch"]
[Site "Dallas"]
[Date "2003.05.25"]
[Round "5"]
[White "Annakov, Babakuli"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "E11"]
[WhiteElo "2527"]
[BlackElo "2467"]
[PlyCount "15"]
[EventDate "2003.05.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 Bb4+ 4. Bd2 Qe7 5. e3 Bxd2+ 6. Nbxd2 d6 7. Be2 0-0 8. 0-0 1/2-1/2

[Event "Texas-ch"]
[Site "Dallas"]
[Date "2003.05.25"]
[Round "4"]
[White "Hayward, Keith Rex"]
[Black "Diesen, Mark C"]
[Result "0-1"]
[ECO "A47"]
[WhiteElo "2281"]
[BlackElo "2467"]
[PlyCount "40"]
[EventDate "2003.05.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. Bd3 Bb7 5. 0-0 Be7 6. b3 0-0 7. Nbd2 c5 8. Bb2 Nc6 9. a3 cxd4 10. exd4 Nd5 11. Re1 Rc8 12. g3 Re8 13. Ne5 Nf6 14. Ndf3 d6 15. Ng5 dxe5 16. dxe5 Nxe5 17. Rxe5 h6 18. h4 Rc5 19. Rxc5 Bxc5 20. Nf3 Ng4 0-1

[Event "Texas-ch"]
[Site "Dallas"]
[Date "2003.05.24"]
[Round "3"]
[White "Diesen, Mark C"]
[Black "Suarez, Andres"]
[Result "1-0"]
[ECO "C11"]
[WhiteElo "2467"]
[BlackElo "2071"]
[PlyCount "133"]
[EventDate "2003.05.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 e6 2. Nf3 d5 3. Nc3 Nf6 4. e5 Nfd7 5. d4 c5 6. dxc5 Bxc5 7. Bd3 h6 8. 0-0 0-0 9. Bf4 f6 10. exf6 Qxf6 11. Bg3 a6 12. Qe2 Nc6 13. Rae1 Nb6 14. Ne5 Nd4 15. Qe3 Nb3 16. Ng4 Bxe3 17. Nxf6+ gxf6 18. fxe3 Nc5 19. Be2 e5 20. Bh4 Kg7 21. Rf3 Be6 22. Ref1 Ncd7 23. Rg3+ Kh7 24. Bh5 Rac8 25. e4 d4 26. Nd5 Nxd5 27. exd5 Bxd5 28. Bg6+ Kh8 29. Bf5 Rf7 30. Rg6 Rg8 31. Rxh6+ Kg7 32. Rg6+ Kf8 33. Rxg8+ Kxg8 34. Bxd7 Rxd7 35. Bxf6 Rc7 36. Rf2 d3 37. c3 e4 38. Bg5 Rf7 39. Rxf7 Kxf7 40. b3 Kg6 41. Bd2 b5 42. g4 a5 43. Kf2 a4 44. bxa4 bxa4 45. a3 Kf6 46. Ke3 Ke5 47. c4 Bxc4 48. Bc3+ Kd5 49. g5 Bb5 50. g6 Be8 51. g7 Bf7 52. h4 Bg8 53. h5 Bh7 54. h6 Kc4 55. Bb4 Kd5 56. Kf4 Kd4 57. Bd2 Bg8 58. Be3+ Kc3 59. Kf5 Bh7+ 60. Kf6 Kc4 61. Kf7 Kc3 62. g8Q Bxg8+ 63. Kxg8 d2 64. Bxd2+ Kxd2 65. h7 e3 66. h8Q e2 67. Qd4+ 1-0

[Event "Texas-ch"]
[Site "Dallas"]
[Date "2003.05.24"]
[Round "1"]
[White "Diesen, Mark C"]
[Black "Yeung, Clarence"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "2467"]
[BlackElo "2206"]
[PlyCount "83"]
[EventDate "2003.05.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. d4 f5 2. Bg5 h6 3. Bh4 g5 4. e4 Bg7 5. Bg3 f4 6. Bxf4 gxf4 7. Qh5+ Kf8 8. Qf5+ Ke8 9. Be2 Nf6 10. e5 e6 11. Qxf4 h5 12. exf6 Qxf6 13. Qxf6 Bxf6 14. c3 Na6 15. Nd2 b6 16. Ne4 Bg7 17. Nf3 Bb7 18. Bd3 Nb8 19. 0-0 Nc6 20. Neg5 Ne7 21. Be4 Bxe4 22. Nxe4 Kf7 23. Rad1 Raf8 24. Ne5+ Ke8 25. f4 Bxe5 26. fxe5 Nf5 27. Rd3 Ke7 28. Rdf3 Rfg8 29. Nf6 Rg6 30. Rh3 Rg5 31. g4 h4 32. Rf4 d6 33. Ne4 Rgg8 34. Kf2 Nh6 35. Rxh4 dxe5 36. dxe5 Nf7 37. Rxh8 Rxh8 38. Kg3 Nxe5 39. Rf2 Ng6 40. Ng5 e5 41. Rf7+ Kd8 42. Rg7 1-0

[Event "Texas-ch"]
[Site "Dallas"]
[Date "2003.05.24"]
[Round "2"]
[White "Fleming, Kevin"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "E48"]
[WhiteElo "2050"]
[BlackElo "2467"]
[PlyCount "83"]
[EventDate "2003.05.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nge2 d5 7. 0-0 cxd4 8. exd4 dxc4 9. Bxc4 0-0 10. Bg5 Be7 11. Qd2 b6 12. Rad1 Bb7 13. f4 Rc8 14. Bxf6 Bxf6 15. Bb3 Na5 16. f5 Nxb3 17. axb3 Qd7 18. fxe6 fxe6 19. Qe3 Qc6 20. Qh3 Bg5 21. Kh1 b5 22. d5 exd5 23. Nd4 Rxf1+ 24. Rxf1 Qe8 25. Ncxb5 Rc1 26. Rxc1 Bxc1 27. Qg3 Bxb2 28. Nd6 Qd7 29. N4f5 Bf6 30. h3 Ba6 31. Nh6+ Kf8 32. Ng4 Ke7 33. Ne3 Ke6 34. Ndf5 d4 35. Nc4 Bxc4 36. bxc4 d3 37. Qg4 Kf7 38. c5 Qe6 39. Nd6+ Ke7 40. Nc8+ Kf7 41. Nd6+ Ke7 42. Nc8+ 1/2-1/2

[Event "Texas-ch"]
[Site "Dallas"]
[Date "2002.05.27"]
[Round "6.1"]
[White "Dejmek, Mark W"]
[Black "Diesen, Mark C"]
[Result "1-0"]
[ECO "B48"]
[WhiteElo "2112"]
[BlackElo "2472"]
[PlyCount "53"]
[EventDate "2002.05.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 Qc7 6. Be3 a6 7. Qd2 Nf6 8. f3 Ne5 9. 0-0-0 b5 10. Qf2 Rb8 11. g4 h6 12. h4 b4 13. Na4 d5 14. Bh3 dxe4 15. g5 hxg5 16. hxg5 Nd3+ 17. Rxd3 exd3 18. gxf6 e5 19. Bd7+ Bxd7 20. Rxh8 gxf6 21. Nc5 exd4 22. Bxd4 Qf4+ 23. Be3 Qc4 24. Rxf8+ Kxf8 25. Nxd7+ Ke7 26. Nxb8 Kd6 27. Qd2 1-0

[Event "Texas-ch"]
[Site "Dallas"]
[Date "2002.05.27"]
[Round "7.3"]
[White "Diesen, Mark C"]
[Black "Newsham, Joshua S"]
[Result "1-0"]
[ECO "A35"]
[WhiteElo "2472"]
[BlackElo "2037"]
[PlyCount "101"]
[EventDate "2002.05.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 c5 2. c4 Nc6 3. Nc3 g6 4. e3 Bg7 5. d4 d6 6. h3 Nf6 7. d5 Nb8 8. e4 0-0 9. Bd3 e5 10. g4 Na6 11. Bg5 Bd7 12. Qd2 Re8 13. Ke2 Rb8 14. Rag1 Nb4 15. Bh6 b5 16. b3 bxc4 17. bxc4 Na6 18. Bg5 Nb4 19. Bb1 Qa5 20. Qe3 Qa3 21. Nd2 Rb7 22. Rc1 Reb8 23. f3 Be8 24. h4 Nd7 25. Nb5 Qxe3+ 26. Bxe3 Bf8 27. a3 Na6 28. Nb3 Nf6 29. Na5 Rb6 30. Bd3 Rc8 31. Rb1 Bxb5 32. cxb5 Nb8 33. Nc6 Rb7 34. a4 Nfd7 35. Bd2 c4 36. Bxc4 Nc5 37. a5 a6 38. bxa6 Rxb1 39. Rxb1 Nbxa6 40. Be3 Ra8 41. Bxa6 Nxa6 42. Rb7 Kg7 43. Kd3 h6 44. Kc4 g5 45. h5 Kf6 46. Kb5 Nc5 47. Bxc5 dxc5 48. a6 Be7 49. a7 Kg7 50. Rd7 Bf8 51. Rd8 1-0

[Event "Texas-ch"]
[Site "Dallas"]
[Date "2002.05.26"]
[Round "4.1"]
[White "Diesen, Mark C"]
[Black "Annakov, Babakuli"]
[Result "1/2-1/2"]
[ECO "D35"]
[WhiteElo "2472"]
[BlackElo "2533"]
[PlyCount "23"]
[EventDate "2002.05.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c6 4. cxd5 exd5 5. Bf4 Bd6 6. Bxd6 Qxd6 7. e3 Nd7 8. Bd3 Ngf6 9. Nf3 Nf8 10. h3 Ng6 11. Qc2 Bd7 12. 0-0 1/2-1/2

[Event "Texas-ch"]
[Site "Dallas"]
[Date "2002.05.26"]
[Round "5.1"]
[White "Langer, Mikhail"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "A04"]
[WhiteElo "2308"]
[BlackElo "2472"]
[PlyCount "23"]
[EventDate "2002.05.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d3 Nc6 4. g3 g6 5. Bg2 Bg7 6. 0-0 Nge7 7. Nbd2 0-0 8. Re1 e5 9. a4 d6 10. Nc4 h6 11. c3 Be6 12. Nfd2 1/2-1/2

[Event "Texas-ch"]
[Site "Dallas"]
[Date "2002.05.25"]
[Round "2.1"]
[White "Diesen, Mark C"]
[Black "Moss, Larry L"]
[Result "1-0"]
[ECO "C60"]
[WhiteElo "2472"]
[BlackElo "2200"]
[PlyCount "69"]
[EventDate "2002.05.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 g6 2. e4 Bg7 3. Nf3 d6 4. c3 Nc6 5. Bb5 Bd7 6. 0-0 e5 7. dxe5 dxe5 8. Be3 Nge7 9. Nbd2 0-0 10. Bc5 Re8 11. Bc4 Na5 12. Be2 b6 13. Be3 c5 14. b4 cxb4 15. cxb4 Nac6 16. Bc4 Rf8 17. Qb3 Nc8 18. Rfd1 Qe7 19. Bd5 Nd6 20. Rac1 Rac8 21. Nc4 Nb5 22. a4 Nbd4 23. Bxd4 Nxd4 24. Nxd4 exd4 25. e5 Rxc4 26. Qxc4 Bxe5 27. Re1 Qd6 28. g3 Bf5 29. b5 d3 30. Rcd1 Rc8 31. Bc6 Rd8 32. Be4 Bxe4 33. Rxe4 Qd5 34. Qxd5 Rxd5 35. Kf1 1-0

[Event "Texas-ch"]
[Site "Dallas"]
[Date "2002.05.25"]
[Round "3.1"]
[White "Huddleston, James Douglas"]
[Black "Diesen, Mark C"]
[Result "0-1"]
[ECO "B44"]
[WhiteElo "2055"]
[BlackElo "2472"]
[PlyCount "38"]
[EventDate "2002.05.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 d6 6. c4 Nf6 7. N1c3 a6 8. Na3 d5 9. cxd5 exd5 10. exd5 Nb4 11. Nc4 Nfxd5 12. Nxd5 Nxd5 13. Be2 Be6 14. 0-0 Bc5 15. Bg4 0-0 16. Bxe6 fxe6 17. Qg4 Qf6 18. Qg3 Qd4 19. Ne5 Rxf2 0-1

[Event "Texas-ch"]
[Site "Dallas"]
[Date "2002.05.25"]
[Round "1.1"]
[White "Weaver, Richard"]
[Black "Diesen, Mark C"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "2200"]
[BlackElo "2472"]
[PlyCount "90"]
[EventDate "2002.05.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 0-0 6. 0-0 Bxc3 7. dxc3 h6 8. b3 Re8 9. Qc2 e4 10. Nd4 d6 11. Nxc6 bxc6 12. h3 a5 13. Be3 c5 14. Kh2 Qe7 15. Rad1 Qe5 16. Bf4 Qf5 17. f3 exf3 18. Qxf5 Bxf5 19. exf3 Re2 20. Rd2 Rxd2 21. Bxd2 Re8 22. Rf2 Bb1 23. Bc1 Re1 24. Ba3 Re3 25. Bf1 Rxc3 26. Bb2 Rc2 27. Rxc2 Bxc2 28. Bc3 a4 29. bxa4 Bxa4 30. Kg2 Nd7 31. Bd3 Nb6 32. Kf2 Bd7 33. h4 Be6 34. Ba5 Kf8 35. Ke3 Ke7 36. a3 Kd7 37. Bxb6 cxb6 38. f4 f6 39. f5 Bf7 40. Kd2 d5 41. cxd5 Bxd5 42. Kc3 Bc6 43. Bc4 b5 44. Be6+ Kd6 45. Bf7 Bd7 0-1

[Event "ICS Anniversary op"]
[Site "Fics Internet INT"]
[Date "2002.01.15"]
[Round "8"]
[White "Diesen, Mark C"]
[Black "Corvi, Marco"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "2416"]
[BlackElo "2300"]
[PlyCount "99"]
[EventDate "2002.01.15"]
[EventType "swiss (blitz)"]
[EventRounds "9"]
[EventCountry "NET"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 f5 2. Bg5 h6 3. Bh4 g5 4. e4 Nf6 5. e5 Bg7 6. exf6 Bxf6 7. Qh5+ Kf8 8. Bg3 f4 9. Bc4 Qe8 10. Qxe8+ Kxe8 11. Bxf4 gxf4 12. c3 Nc6 13. Nd2 b6 14. Ne2 Bb7 15. Nxf4 Na5 16. Bd5 e6 17. Bxb7 Nxb7 18. Ne4 Kf7 19. 0-0 Nd6 20. Rae1 Nxe4 21. Rxe4 Rhg8 22. Nd3 Rg5 23. f4 Rg4 24. g3 Rag8 25. Kg2 h5 26. Ne5+ Bxe5 27. fxe5+ Ke7 28. Rxg4 Rxg4 29. Rf6 c5 30. h3 Re4 31. Kf3 Re1 32. Rh6 cxd4 33. cxd4 Rd1 34. Ke3 Re1+ 35. Kf4 Rd1 36. Rh7+ Kd8 37. Kg5 Rxd4 38. Rxh5 Rd2 39. Rh8+ Kc7 40. h4 Rxb2 41. h5 Rxa2 42. h6 Rh2 43. h7 Kb7 44. g4 a5 45. Kg6 a4 46. Rd8 Kc7 47. h8Q Rxh8 48. Rxh8 b5 49. g5 b4 50. Rh4 1-0

[Event "ICS Anniversary op"]
[Site "Fics Internet INT"]
[Date "2002.01.15"]
[Round "5"]
[White "Diesen, Mark C"]
[Black "Malloni, Marcello"]
[Result "0-1"]
[ECO "E39"]
[WhiteElo "2416"]
[BlackElo "2261"]
[PlyCount "138"]
[EventDate "2002.01.15"]
[EventType "swiss (blitz)"]
[EventRounds "9"]
[EventCountry "NET"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 0-0 6. a3 Bxc5 7. Nf3 b6 8. Bf4 Bb7 9. e3 d5 10. Rd1 Qc8 11. cxd5 Nxd5 12. Ng5 g6 13. Nxd5 Bxd5 14. Bd3 Nd7 15. h4 Be7 16. h5 Qxc2 17. Bxc2 h6 18. Nxf7 Rxf7 19. hxg6 Rxf4 20. exf4 Kg7 21. f3 Nf8 22. f5 Rc8 23. Be4 Bb3 24. Rb1 exf5 25. Bxf5 Rc5 26. Be4 Nxg6 27. Kf2 Re5 28. Rbc1 Bc5+ 29. Kg3 Rg5+ 30. Kh2 a5 31. Rc3 Bf7 32. g4 h5 33. Bf5 hxg4 34. fxg4 Ne5 35. Kg3 Bg6 36. Kf4 Nf7 37. Bxg6 Rxg6 38. Rh5 Nd8 39. g5 Ne6+ 40. Kf5 Nd4+ 41. Kg4 Nc6 42. Kf5 Ne7+ 43. Kg4 Re6 44. Rh2 Nd5 45. Rf3 Re4+ 46. Kf5 Re7 47. Kg4 Ne3+ 48. Kh5 Nd5 49. Rd2 Nc7 50. Rd1 Ne6 51. Rdf1 Nd4 52. R3f2 Ne2 53. Rf3 Nd4 54. R3f2 Ne6 55. g6 Bxf2 56. Rxf2 Nf8 57. Rd2 Nxg6 58. Rd6 Re6 59. Rd7+ Kf6 60. Rb7 Ne5 61. Kh4 Kf5 62. b4 axb4 63. axb4 Ke4 64. b5 Kd5 65. Kg5 Kc5 66. Kf5 Re8 67. Rc7+ Kxb5 68. Rh7 Nc4 69. Kf4 Re5 0-1

[Event "ICS Anniversary op"]
[Site "Fics Internet INT"]
[Date "2002.01.15"]
[Round "1"]
[White "Diesen, Mark C"]
[Black "Schulien, Charles"]
[Result "1-0"]
[ECO "D45"]
[WhiteElo "2416"]
[BlackElo "2352"]
[PlyCount "111"]
[EventDate "2002.01.15"]
[EventType "swiss (blitz)"]
[EventRounds "9"]
[EventCountry "NET"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 e6 4. e3 Nf6 5. Nc3 Nbd7 6. Qc2 Bd6 7. g4 dxc4 8. g5 Nd5 9. Bxc4 Bb4 10. Bd2 b6 11. Ne4 Bxd2+ 12. Qxd2 Qe7 13. Ne5 Bb7 14. f3 0-0 15. 0-0-0 Rac8 16. Kb1 c5 17. Rhg1 cxd4 18. Nf6+ N5xf6 19. gxf6 Nxf6 20. exd4 Rxc4 21. Nxc4 Bxf3 22. Rdf1 Be4+ 23. Ka1 Bg6 24. Ne5 Rd8 25. h4 Qd6 26. Rd1 Ne8 27. a3 Bh5 28. Ng4 Bxg4 29. Rxg4 Nf6 30. Rgg1 g6 31. Qg5 Ne4 32. Qg4 Qd5 33. h5 Qf5 34. Qh4 g5 35. h6 Qg6 36. Qh2 g4 37. Qc7 Rf8 38. d5 exd5 39. Rxd5 Nf6 40. Rb5 Ne4 41. Re5 Nc5 42. Re3 f5 43. Qf4 Ne6 44. Qd6 Nc5 45. Qc7 f4 46. Re7 Ne6 47. Qe5 Rf5 48. Qxe6+ Qxe6 49. Rxe6 g3 50. Re7 Kf8 51. Rxh7 f3 52. Rh8+ Kf7 53. h7 Rh5 54. Rxg3 f2 55. Rf3+ Kg7 56. Rhf8 1-0

[Event "ICS Anniversary op"]
[Site "Fics Internet INT"]
[Date "2002.01.15"]
[Round "2"]
[White "Diesen, Mark C"]
[Black "Topi Hulmi, Teemu"]
[Result "1-0"]
[ECO "D12"]
[WhiteElo "2416"]
[BlackElo "2150"]
[PlyCount "79"]
[EventDate "2002.01.15"]
[EventType "swiss (blitz)"]
[EventRounds "9"]
[EventCountry "NET"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Qb3 Qc7 7. Bd2 Nc6 8. Bb5 e6 9. 0-0 Bd6 10. Bb4 0-0 11. Bxd6 Qxd6 12. Nc3 Ne4 13. Rac1 Nxc3 14. Qxc3 Rac8 15. Qc5 Qxc5 16. Rxc5 Ne7 17. Rfc1 Rxc5 18. Rxc5 Rc8 19. Bd7 Rb8 20. Rc7 Kf8 21. Ne5 f6 22. Nf3 Kf7 23. h3 Bd3 24. b4 a6 25. Nd2 Bb5 26. Nb3 Bxd7 27. Rxd7 Ke8 28. Rd6 Kf7 29. Nc5 Nc6 30. Rd7+ Kf8 31. Nxe6+ Ke8 32. Rxg7 Nxb4 33. Rg8+ Ke7 34. Rxb8 Kxe6 35. Rxb7 Nxa2 36. Rb6+ Kf5 37. Rxa6 Nc3 38. g4+ Ke4 39. Rxf6 h5 40. gxh5 1-0

[Event "ICS Anniversary op"]
[Site "Fics Internet INT"]
[Date "2002.01.15"]
[Round "3"]
[White "Krivoshey, Sergei"]
[Black "Diesen, Mark C"]
[Result "1-0"]
[ECO "E15"]
[WhiteElo "2455"]
[BlackElo "2416"]
[PlyCount "81"]
[EventDate "2002.01.15"]
[EventType "swiss (blitz)"]
[EventRounds "9"]
[EventCountry "NET"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 b6 4. g3 Ba6 5. Nbd2 Bb7 6. Bg2 c5 7. e4 cxd4 8. 0-0 d6 9. Nxd4 a6 10. a4 Qc7 11. a5 Nbd7 12. axb6 Nxb6 13. b3 Be7 14. Bb2 0-0 15. Re1 Rfe8 16. Bc3 Nfd7 17. Rc1 Bf6 18. Nf1 Rac8 19. Ne3 g6 20. h4 Bg7 21. h5 Nf6 22. hxg6 hxg6 23. Ng4 Nbd7 24. Nxf6+ Nxf6 25. Qd3 Ng4 26. Ne2 Ne5 27. Qd2 f5 28. exf5 gxf5 29. Bxe5 dxe5 30. Bxb7 Qxb7 31. Qe3 e4 32. Nf4 Rcd8 33. Red1 Qf7 34. Qb6 Rxd1+ 35. Rxd1 Bh6 36. Qd6 a5 37. c5 Bf8 38. Qe5 Qb7 39. Nh5 Kf7 40. Qf6+ Kg8 41. Qg6+ 1-0

[Event "ICS Anniversary op"]
[Site "Fics Internet INT"]
[Date "2002.01.15"]
[Round "4"]
[White "L'Ami, Erwin"]
[Black "Diesen, Mark C"]
[Result "1-0"]
[ECO "A34"]
[WhiteElo "2353"]
[BlackElo "2416"]
[PlyCount "63"]
[EventDate "2002.01.15"]
[EventType "swiss (blitz)"]
[EventRounds "9"]
[EventCountry "NET"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. c4 Nc6 4. Nc3 Nf6 5. Be2 d5 6. exd5 exd5 7. d4 dxc4 8. d5 Na5 9. Bf4 Bd6 10. Bxd6 Qxd6 11. Qa4+ Bd7 12. Qxa5 0-0 13. 0-0 a6 14. Rad1 b5 15. Rfe1 Rfe8 16. Bf1 Bg4 17. a3 h6 18. Rxe8+ Rxe8 19. Re1 Rxe1 20. Nxe1 Bc8 21. a4 b4 22. Nd1 Nxd5 23. Bxc4 Ne7 24. Nd3 Be6 25. Qxa6 Qd4 26. Bxe6 fxe6 27. Ne3 Kf7 28. Qc4 Nd5 29. Qxd4 cxd4 30. Nxd5 exd5 31. Nxb4 d3 32. Nxd3 1-0

[Event "ICS Anniversary op"]
[Site "Fics Internet INT"]
[Date "2002.01.15"]
[Round "7"]
[White "Olsson, Linus"]
[Black "Diesen, Mark C"]
[Result "1-0"]
[ECO "D43"]
[WhiteElo "2252"]
[BlackElo "2416"]
[PlyCount "59"]
[EventDate "2002.01.15"]
[EventType "swiss (blitz)"]
[EventRounds "9"]
[EventCountry "NET"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bxf6 Qxf6 7. e3 g6 8. Bd3 Nd7 9. 0-0 Bg7 10. e4 dxe4 11. Nxe4 Qe7 12. Re1 0-0 13. Rc1 b6 14. d5 cxd5 15. cxd5 e5 16. Bb5 a6 17. Bc6 Rb8 18. d6 Qd8 19. Qd5 Kh7 20. Bxd7 Qxd7 21. Nxe5 Qf5 22. Ng3 Qg5 23. h4 Qxh4 24. Nxf7 Bb7 25. Qb3 Qf4 26. Rc7 Ba8 27. Ree7 Rg8 28. Qc3 Bxc3 29. Ng5+ Kh8 30. Rh7# 1-0

[Event "ICS Anniversary op"]
[Site "Fics Internet INT"]
[Date "2002.01.15"]
[Round "6"]
[White "Roeder, Mathias"]
[Black "Diesen, Mark C"]
[Result "1-0"]
[ECO "A70"]
[WhiteElo "2478"]
[BlackElo "2416"]
[PlyCount "76"]
[EventDate "2002.01.15"]
[EventType "swiss (blitz)"]
[EventRounds "9"]
[EventCountry "NET"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bf4 Bg7 8. Qa4+ Bd7 9. Qb3 Qc7 10. e4 0-0 11. Nd2 Re8 12. Be2 a6 13. a4 Bg4 14. f3 Nh5 15. Be3 Bc8 16. 0-0 Nd7 17. Nc4 Rb8 18. Kh1 f5 19. a5 f4 20. Bf2 Ne5 21. Na4 Kh8 22. Nab6 Bd7 23. Nxe5 Bxe5 24. Nc4 Bg7 25. Rfe1 Bb5 26. Nd2 Qd7 27. Qc2 Qe7 28. Bd3 Rbc8 29. Bc4 Qg5 30. Kg1 Nf6 31. Qd3 Bd7 32. Re2 Rb8 33. Rae1 Nh5 34. e5 Rxe5 35. Ne4 Qd8 36. Nxd6 Rxe2 37. Nf7+ Kg8 38. Nxd8 Rxd8 1-0

[Event "WCN k.o."]
[Site "Internet USCF"]
[Date "2001.??.??"]
[Round "?"]
[White "Charbonneau, Pascal"]
[Black "Diesen, Mark C"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "2405"]
[BlackElo "2410"]
[PlyCount "44"]
[EventDate "2001.12.??"]
[EventType "k.o."]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Bb5 Nd4 4. Bc4 e6 5. Nf3 Ne7 6. Nxd4 cxd4 7. Ne2 Nc6 8. 0-0 Bc5 9. d3 0-0 10. a3 a6 11. Ba2 b5 12. Ng3 Qh4 13. f4 Bb7 14. Bd2 Ne7 15. Be1 Qh6 16. f5 Bd6 17. Qg4 exf5 18. exf5 Be5 19. Bb3 Nd5 20. Qe4 Rae8 21. Qf3 Nf4 22. Qxb7 Ne2+ 0-1

[Event "ICC active"]
[Site "ICC INT"]
[Date "2001.??.??"]
[Round "?"]
[White "Christiansen, Larry Mark"]
[Black "Diesen, Mark C"]
[Result "0-1"]
[ECO "A28"]
[WhiteElo "2566"]
[BlackElo "2410"]
[PlyCount "100"]
[EventDate "2001.??.??"]
[EventType "k.o. (rapid)"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d4 exd4 5. Nxd4 Bb4 6. Bg5 h6 7. Bh4 Bxc3+ 8. bxc3 Ne5 9. f4 Ng6 10. Bxf6 Qxf6 11. g3 Nf8 12. Bg2 Ne6 13. 0-0 0-0 14. Qd2 d6 15. Rab1 Nc5 16. Nb3 Na4 17. Rbc1 Rb8 18. Qd4 b6 19. Bc6 Nc5 20. Nxc5 bxc5 21. Qxf6 gxf6 22. Rb1 Be6 23. Bd5 Bxd5 24. cxd5 Rfe8 25. Kf2 Rb6 26. c4 Reb8 27. Rxb6 Rxb6 28. g4 Rb2 29. Kf3 a5 30. h4 a4 31. Rc1 Kf8 32. e3 Ke7 33. Ke4 Rxa2 34. Rb1 Rc2 35. Rb8 Rxc4+ 36. Kf5 Rb4 37. Rc8 Kd7 38. Ra8 c4 39. Ke4 c3+ 40. Kd3 Rc4 41. Kc2 Re4 42. Kxc3 Rxe3+ 43. Kd4 Rh3 44. Ke4 Rxh4 45. Kf5 h5 46. Rh8 a3 47. Kxf6 Rxg4 48. Kf5 a2 49. Ra8 Rg2 50. Ke4 h4 0-1

[Event "WCN k.o."]
[Site "Internet USCF"]
[Date "2001.??.??"]
[Round "?"]
[White "Christiansen, Larry Mark"]
[Black "Diesen, Mark C"]
[Result "0-1"]
[ECO "B27"]
[WhiteElo "2570"]
[BlackElo "2410"]
[PlyCount "84"]
[EventDate "2001.12.??"]
[EventType "k.o."]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. c3 g6 3. Nf3 Bg7 4. Bc4 e6 5. Qe2 Nc6 6. a3 Nge7 7. d3 0-0 8. 0-0 h6 9. Re1 d5 10. Ba2 b5 11. Be3 d4 12. cxd4 cxd4 13. Bf4 e5 14. Bg3 g5 15. Nbd2 Ng6 16. Rac1 Bd7 17. Rc5 g4 18. Rec1 gxf3 19. Nxf3 Qb6 20. Nh4 Nce7 21. Nxg6 Nxg6 22. Rc7 Rfc8 23. Rxc8+ Rxc8 24. Rxc8+ Bxc8 25. h4 Be6 26. Bxe6 Qxe6 27. Qc2 a6 28. Qc7 Ne7 29. h5 f5 30. Bh4 Bf6 31. Bxf6 Qxf6 32. exf5 Nxf5 33. g3 Qe6 34. Qb7 Ne7 35. b3 Kf7 36. a4 Qxb3 37. Qf3+ Ke6 38. Qg4+ Kd6 39. axb5 axb5 40. Qg7 Qe6 41. f4 exf4 42. Qxd4+ Nd5 0-1

[Event "WCN k.o."]
[Site "Internet USCF"]
[Date "2001.??.??"]
[Round "?"]
[White "Christiansen, Larry Mark"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "D89"]
[WhiteElo "2570"]
[BlackElo "2410"]
[PlyCount "79"]
[EventDate "2001.12.??"]
[EventType "k.o."]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 0-0 8. Be3 c5 9. Ne2 Nc6 10. 0-0 Bg4 11. f3 Na5 12. Bd3 cxd4 13. cxd4 Be6 14. d5 Bxa1 15. Qxa1 f6 16. Rb1 Bd7 17. Bh6 Rf7 18. e5 Bc6 19. e6 Rg7 20. dxc6 Qxd3 21. cxb7 Nxb7 22. Rxb7 Qxe2 23. Qb1 Qxe6 24. h3 a5 25. Qb5 Rd8 26. Qxa5 Rd1+ 27. Kh2 Qd6+ 28. f4 Qd4 29. Qa7 Qe4 30. Qb8+ Kf7 31. Rxe7+ Kxe7 32. Bxg7 Rd2 33. Qc7+ Ke8 34. Qc8+ Ke7 35. Qc5+ Ke6 36. Qb6+ Kd7 37. Qa7+ Ke6 38. Qb6+ Kd7 39. Qa7+ Ke6 40. Qb6+ 1/2-1/2

[Event "WCN k.o."]
[Site "Internet USCF"]
[Date "2001.??.??"]
[Round "?"]
[White "Christiansen, Larry Mark"]
[Black "Diesen, Mark C"]
[Result "1-0"]
[ECO "C65"]
[WhiteElo "2570"]
[BlackElo "2410"]
[PlyCount "94"]
[EventDate "2001.12.??"]
[EventType "k.o."]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. Qe2 a6 5. Bxc6 dxc6 6. b3 Bd6 7. Bb2 Qe7 8. d3 0-0 9. Nbd2 b5 10. 0-0 Nh5 11. d4 Nf4 12. Qe3 exd4 13. Bxd4 c5 14. Bb2 f6 15. Rae1 Bb7 16. g3 Nh3+ 17. Kg2 Qe6 18. Ng1 Ng5 19. f3 Rae8 20. h4 Nf7 21. Nh3 Ne5 22. Nf4 Qd7 23. Nd3 Qe7 24. Bxe5 fxe5 25. c4 b4 26. Rf2 Qe6 27. Nxc5 Bxc5 28. Qxc5 Kh8 29. Qxb4 Bc8 30. Rh1 Rd8 31. Qc5 Rf7 32. Nf1 Rd3 33. Rd2 Qd7 34. Rxd3 Qxd3 35. Qf2 Bg4 36. Nh2 Bd7 37. Re1 h6 38. Qe2 Qd6 39. Rd1 Qe6 40. Ng4 h5 41. Nf2 Qf6 42. Qe3 Be6 43. Rd3 a5 44. Nh3 Bxh3+ 45. Kxh3 a4 46. Qg5 Qe6+ 47. Kg2 g6 1-0

[Event "WCN k.o."]
[Site "Internet USCF"]
[Date "2001.??.??"]
[Round "?"]
[White "Diesen, Mark C"]
[Black "O'Donnell, Tom"]
[Result "1/2-1/2"]
[ECO "D45"]
[WhiteElo "2410"]
[BlackElo "2357"]
[PlyCount "91"]
[EventDate "2001.12.??"]
[EventType "k.o."]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. d4 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 0-0 8. Bb2 a6 9. Be2 e5 10. 0-0-0 e4 11. Nd2 b5 12. c5 Bc7 13. g4 Qe7 14. Rdg1 Ne8 15. Kb1 f5 16. gxf5 Ndf6 17. h4 Bxf5 18. h5 h6 19. Rg2 Nh7 20. Qd1 Rf7 21. Ka1 Bb8 22. f3 exf3 23. Nxf3 Nef6 24. Nh4 Be4 25. Nxe4 Nxe4 26. Ng6 Qe8 27. Rf1 Raa7 28. Rfg1 Nhg5 29. Bd3 Nf2 30. Qe2 Nxd3 31. Qxd3 Rf3 32. Qd1 Raf7 33. Re1 Qe4 34. Qe2 Bg3 35. Reg1 Rf2 36. Rxf2 Rxf2 37. Qd1 Bh2 38. Rf1 Qxe3 39. Re1 Qd2 40. Qxd2 Rxd2 41. Bc1 Rxd4 42. Re8+ Kf7 43. Re7+ Kg8 44. Re8+ Kf7 45. Re7+ Kg8 46. Re8+ 1/2-1/2

[Event "WCN k.o."]
[Site "Internet USCF"]
[Date "2001.??.??"]
[Round "?"]
[White "Diesen, Mark C"]
[Black "O'Donnell, Tom"]
[Result "1-0"]
[ECO "B76"]
[WhiteElo "2410"]
[BlackElo "2357"]
[PlyCount "57"]
[EventDate "2001.12.??"]
[EventType "k.o."]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[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 d5 10. exd5 Nxd5 11. Nxc6 bxc6 12. Bd4 e5 13. Bc5 Re8 14. Nxd5 cxd5 15. Qxd5 Qxd5 16. Rxd5 Be6 17. Rd6 Bxa2 18. b4 a5 19. Bb5 Rec8 20. Bd7 Rc7 21. Bc6 Rb8 22. Rhd1 Bf8 23. Rd8 Rcc8 24. Rxf8+ Rxf8 25. Bxf8 Kxf8 26. bxa5 Rb1+ 27. Kd2 Rxd1+ 28. Kxd1 Bc4 29. Bb7 1-0

[Event "ICC active"]
[Site "ICC INT"]
[Date "2001.??.??"]
[Round "?"]
[White "Diesen, Mark C"]
[Black "Schleifer, Michael"]
[Result "1/2-1/2"]
[ECO "D26"]
[WhiteElo "2410"]
[BlackElo "2368"]
[PlyCount "76"]
[EventDate "2001.??.??"]
[EventType "k.o. (rapid)"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 Bd6 6. Nc3 Nc6 7. e4 e5 8. dxe5 Nxe5 9. Nxe5 Bxe5 10. Qxd8+ Kxd8 11. Bxf7 Bxc3+ 12. bxc3 Nxe4 13. 0-0 Bd7 14. Ba3 Kc8 15. Rfe1 Nd6 16. Bxd6 cxd6 17. Re7 Kd8 18. Rae1 Rc8 19. c4 Bc6 20. Bh5 g6 21. Bg4 Rc7 22. Rxc7 Kxc7 23. Re7+ Kb6 24. f4 Kc5 25. Be6 Rf8 26. g3 h5 27. Kf2 Kd4 28. Bd5 g5 29. Bf7 gxf4 30. gxf4 h4 31. Ke2 a6 32. Kd2 b5 33. cxb5 axb5 34. f5 Be4 35. f6 d5 36. a3 Kc5 37. Ke3 Kd6 38. Kd4 Bf5 1/2-1/2

[Event "WCN k.o."]
[Site "Internet USCF"]
[Date "2001.??.??"]
[Round "?"]
[White "Diesen, Mark C"]
[Black "Tyomkin, Dimitri"]
[Result "0-1"]
[ECO "A70"]
[WhiteElo "2410"]
[BlackElo "2461"]
[PlyCount "128"]
[EventDate "2001.12.??"]
[EventType "k.o."]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 g6 6. Nc3 Bg7 7. e4 d6 8. h3 0-0 9. Bd3 Na6 10. 0-0 Nc7 11. Re1 Re8 12. a4 a6 13. Bf4 Rb8 14. Bf1 b5 15. e5 dxe5 16. Nxe5 Bb7 17. Nc6 Bxc6 18. dxc6 Rxe1 19. Qxe1 b4 20. Rd1 Qc8 21. Ne4 Nxe4 22. Qxe4 Bd4 23. Rxd4 cxd4 24. Qe5 Rb6 25. Qxc7 Qxc7 26. Bxc7 Rxc6 27. Be5 Rc1 28. Bxd4 a5 29. Bb6 Rb1 30. Bxa5 Rxb2 31. Bb6 b3 32. a5 Rb1 33. Bd4 b2 34. Bxb2 Rxb2 35. g3 Kg7 36. a6 Ra2 37. Kg2 Kf6 38. Kf3 Ke5 39. Ke3 Ra3+ 40. Bd3 Kd5 41. h4 h6 42. Kd2 Kd4 43. Be2 f6 44. Ke1 Ra1+ 45. Kd2 f5 46. Bb5 Ra5 47. Be2 Ra2+ 48. Ke1 f4 49. gxf4 Ke4 50. Bc4 Ra1+ 51. Ke2 Kxf4 52. Bd3 Ra2+ 53. Ke1 Kg4 54. Bxg6 Rxa6 55. Be4 Kxh4 56. Kf1 Kh3 57. Ke2 h5 58. Kf3 Rf6+ 59. Ke3 h4 60. f4 Kg3 61. f5 h3 62. Kd4 Kf4 63. Kd5 h2 64. Kd4 Rxf5 0-1

[Event "WCN k.o."]
[Site "Internet USCF"]
[Date "2001.??.??"]
[Round "?"]
[White "Diesen, Mark C"]
[Black "Tyomkin, Dimitri"]
[Result "1/2-1/2"]
[ECO "A70"]
[WhiteElo "2410"]
[BlackElo "2461"]
[PlyCount "132"]
[EventDate "2001.12.??"]
[EventType "k.o."]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. d5 exd5 5. cxd5 g6 6. e4 d6 7. h3 Bg7 8. Nf3 0-0 9. Bd3 Nbd7 10. 0-0 Nh5 11. Bg5 Bf6 12. Be3 Re8 13. Qd2 a6 14. a4 b6 15. Rab1 Ra7 16. Bh6 Ne5 17. Nxe5 Bxe5 18. Be2 Ng7 19. Rfe1 f5 20. Bg5 Bf6 21. Bxf6 Qxf6 22. exf5 Nxf5 23. Bd3 Rae7 24. Rxe7 Rxe7 25. Re1 Nd4 26. Rxe7 Qxe7 27. Qf4 Kg7 28. Kh2 Qf6 29. Qe3 Qe5+ 30. Qxe5+ dxe5 31. g4 Kf7 32. Kg3 Ke7 33. Ne4 Bb7 34. a5 Bxd5 35. axb6 c4 36. Bb1 a5 37. Nc3 Bc6 38. f4 Kd6 39. f5 gxf5 40. gxf5 Kc5 41. f6 Kxb6 42. Bxh7 Kc5 43. Kg4 Kd6 44. Bg8 Bd7+ 45. Kg5 Bxh3 46. Bxc4 Bg2 47. Kg6 Bc6 48. Ne2 Be4+ 49. Kg7 Nf5+ 50. Kf8 Bf3 51. Nc3 e4 52. f7 e3 53. Ke8 Bh5 54. Bd3 Nh6 55. Bc4 Nxf7 56. Bxf7 e2 57. Nxe2 Bxe2 58. Kd8 Bg4 59. Bb3 Kc5 60. Kc7 Bf3 61. Bc2 Be2 62. Kb7 Bc4 63. Kc7 Bb5 64. Kb7 Kb4 65. Kb6 Bd3 66. Bxd3 Kb3 1/2-1/2

[Event "WCN k.o."]
[Site "Internet USCF"]
[Date "2001.??.??"]
[Round "?"]
[White "Diesen, Mark C"]
[Black "Tyomkin, Dimitri"]
[Result "1/2-1/2"]
[ECO "A16"]
[WhiteElo "2410"]
[BlackElo "2461"]
[PlyCount "109"]
[EventDate "2001.12.??"]
[EventType "k.o."]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 d5 4. Qa4+ Bd7 5. Qb3 dxc4 6. Qxc4 Bg7 7. e4 0-0 8. e5 Ng4 9. d4 Be6 10. d5 Bf5 11. Bf4 Nd7 12. Qe2 f6 13. e6 Nde5 14. Rd1 Qd6 15. Bg3 Nxf3+ 16. Qxf3 Ne5 17. Qe3 c6 18. Be2 cxd5 19. Nxd5 Qxe6 20. Bxe5 Qxe5 21. Nxe7+ Kh8 22. Qxe5 fxe5 23. Nxf5 gxf5 24. Rd7 Rac8 25. Bd1 Rfd8 26. Rxd8+ Rxd8 27. g4 e4 28. gxf5 Bxb2 29. Ke2 Bc1 30. Rg1 h6 31. f6 Rd2+ 32. Ke1 Rxa2 33. f7 Ba3 34. Rg8+ Kh7 35. f8Q Bxf8 36. Rxf8 Kg6 37. Rf4 e3 38. fxe3 Rxh2 39. Ra4 a6 40. Bf3 Rb2 41. Kd1 Kf6 42. Kc1 Rb5 43. Kd2 h5 44. Rh4 Kg6 45. Kc3 a5 46. Be2 Rg5 47. Bd3+ Kf6 48. Kd4 b5 49. e4 a4 50. e5+ Rxe5 51. Rf4+ Ke6 52. Rf8 Rg5 53. Rb8 Kd6 54. Rxb5 Rxb5 55. Bxb5 1/2-1/2

[Event "ICC active"]
[Site "ICC INT"]
[Date "2001.??.??"]
[Round "?"]
[White "Diesen, Mark C"]
[Black "Wallace, John Paul"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "2410"]
[BlackElo "2366"]
[PlyCount "195"]
[EventDate "2001.??.??"]
[EventType "k.o. (rapid)"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 Na6 7. 0-0 e5 8. Be3 c6 9. d5 Ng4 10. Bg5 f6 11. Bh4 c5 12. Ne1 h5 13. Nd3 Qd7 14. h3 Nh6 15. Bg3 Qe7 16. f4 Bd7 17. Qd2 Nb4 18. fxe5 dxe5 19. Bf2 b6 20. a3 Nxd3 21. Qxd3 f5 22. b4 cxb4 23. d6 Qe6 24. axb4 Nf7 25. c5 a5 26. Nd5 fxe4 27. Qxe4 Ng5 28. Qc4 bxc5 29. Nc7 Qxc4 30. Bxc4+ Kh7 31. Nxa8 cxb4 32. Nb6 Bf5 33. Rxa5 Ne4 34. Be3 Nxd6 35. Bb3 Rb8 36. Rd1 Ne4 37. Ra7 Nc3 38. Rd2 Nb5 39. Re7 Kh8 40. Na4 Nd4 41. Bxd4 exd4 42. Rxg7 Kxg7 43. Rxd4 Kh6 44. Nc5 Rc8 45. Rc4 g5 46. Na6 Rxc4 47. Bxc4 h4 48. Nxb4 g4 49. hxg4 Bxg4 50. Kh2 Kg5 51. Nd5 Kh6 52. Bd3 Kg5 53. Kg1 Be6 54. Be4 Kg4 55. Kf2 Kg5 56. Bf3 Bd7 57. Kg1 Bf5 58. Ne3 Be6 59. Kf2 Bd7 60. Be4 Be6 61. Kf3 Bd7 62. Nd5 Bg4+ 63. Ke3 Be6 64. Nf4 Bd7 65. Ne2 Bg4 66. Ng1 Bc8 67. Nf3+ Kg4 68. Kf2 Be6 69. Bc6 Bc8 70. Ng1 Be6 71. Nh3 Bc8 72. Bf3+ Kf5 73. Ke3 Be6 74. Kd4 Bc8 75. Kd5 Kf6 76. Nf2 Kg5 77. Ke5 Bd7 78. Ne4+ Kh6 79. Kf4 Kg6 80. Ng5 Kf6 81. Be4 Bc8 82. Nf3 h3 83. g3 Bd7 84. Nh2 Bc8 85. g4 Bd7 86. g5+ Kg7 87. Bf5 Be8 88. Bxh3 Bg6 89. Ng4 Bc2 90. Ne5 Bb1 91. Bf5 Ba2 92. g6 Bb3 93. Kg5 Ba4 94. Nd7 Bb3 95. Nf6 Ba4 96. Nh5+ Kg8 97. Be6+ Kh8 98. g7+ 1-0

[Event "WCN k.o."]
[Site "Internet USCF"]
[Date "2001.??.??"]
[Round "?"]
[White "O'Donnell, Tom"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "B17"]
[WhiteElo "2357"]
[BlackElo "2410"]
[PlyCount "138"]
[EventDate "2001.12.??"]
[EventType "k.o."]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Ng5 Ngf6 6. Bd3 e6 7. N1f3 Bd6 8. Qe2 h6 9. Ne4 Nxe4 10. Qxe4 Qc7 11. Bd2 b6 12. Qg4 g5 13. Qh3 Rg8 14. Qxh6 Bf8 15. Qh5 Nf6 16. Qh3 g4 17. Qh4 gxf3 18. Qxf6 fxg2 19. Rg1 Qxh2 20. 0-0-0 Bb7 21. Be4 Be7 22. Qf3 Kd7 23. Rxg2 Rxg2 24. Qxg2 Qxg2 25. Bxg2 Rg8 26. Bf3 Rh8 27. Rh1 Rxh1+ 28. Bxh1 Ba6 29. Be3 Bc4 30. b3 Bd5 31. f3 b5 32. Kd2 b4 33. Bg2 a5 34. Ke2 c5 35. dxc5 Kc6 36. Kf2 Bxc5 37. Bf1 e5 38. Bd3 Be6 39. Bxc5 Kxc5 40. Ke3 f5 41. Ba6 Bd5 42. Be2 f4+ 43. Kd3 Bb7 44. c3 Ba6+ 45. c4 Bb7 46. Bd1 Bc6 47. Be2 Kd6 48. Bd1 Be8 49. Bc2 Kc5 50. Kd2 Bc6 51. Ke2 Kd4 52. Bf5 Kc3 53. Be6 Kb2 54. Bd5 Be8 55. c5 Kxa2 56. Kd3 Bb5+ 57. Kc2 Ka3 58. c6 a4 59. c7 axb3+ 60. Bxb3 Bd7 61. Bd5 Bc8 62. Kd3 b3 63. Bxb3 Kxb3 64. Ke4 Kb4 65. Kxe5 Kc5 66. Kxf4 Kd6 67. Kg5 Kxc7 68. f4 Kd6 69. f5 Bxf5 1/2-1/2

[Event "WCN k.o."]
[Site "Internet USCF"]
[Date "2001.??.??"]
[Round "?"]
[White "Tyomkin, Dimitri"]
[Black "Diesen, Mark C"]
[Result "1-0"]
[ECO "D45"]
[WhiteElo "2461"]
[BlackElo "2410"]
[PlyCount "147"]
[EventDate "2001.12.??"]
[EventType "k.o."]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2 Bd6 7. b3 0-0 8. Bb2 e5 9. dxe5 Nxe5 10. 0-0-0 Qe7 11. Nxe5 Bxe5 12. cxd5 cxd5 13. Nxd5 Nxd5 14. Rxd5 Bxb2+ 15. Kxb2 Be6 16. Rd4 Rfd8 17. Bd3 Rxd4 18. exd4 Qh4 19. Be4 Bd5 20. Re1 g6 21. g3 Qf6 22. Qd2 Rd8 23. Bxd5 Rxd5 24. Re4 Qf3 25. Rf4 Qh1 26. h4 a5 27. Qc1 Qh3 28. Qc7 Qd7 29. Qxd7 Rxd7 30. Kc3 b5 31. Re4 Rc7+ 32. Kd2 Kf8 33. Re5 Rb7 34. Kd3 f6 35. Re6 Kf7 36. Ra6 a4 37. bxa4 bxa4 38. Rxa4 Rb2 39. Ke3 h5 40. Ra6 g5 41. hxg5 fxg5 42. Rh6 h4 43. gxh4 gxh4 44. Rxh4 Rxa2 45. f4 Ke6 46. Rh6+ Kf5 47. Rh5+ Ke6 48. Re5+ Kf6 49. Ke4 Ra1 50. Rf5+ Ke7 51. Rb5 Re1+ 52. Kf5 Rd1 53. Re5+ Kf7 54. Re4 Rd2 55. Ke5 Ke7 56. d5 Rd1 57. f5 Rd2 58. f6+ Kf7 59. d6 Rd1 60. Rd4 Re1+ 61. Kd5 Kxf6 62. Rf4+ Kg5 63. Rf2 Kg6 64. d7 Rd1+ 65. Ke6 Re1+ 66. Kd6 Rd1+ 67. Ke7 Re1+ 68. Kd8 Kg7 69. Rf4 Rc1 70. Ke7 Re1+ 71. Kd6 Rd1+ 72. Ke6 Kg8 73. Rf5 Re1+ 74. Re5 1-0

[Event "ICC active"]
[Site "ICC INT"]
[Date "2001.??.??"]
[Round "?"]
[White "Wallace, John Paul"]
[Black "Diesen, Mark C"]
[Result "0-1"]
[ECO "D42"]
[WhiteElo "2366"]
[BlackElo "2410"]
[PlyCount "152"]
[EventDate "2001.??.??"]
[EventType "k.o. (rapid)"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Be7 7. cxd5 Nxd5 8. Bd3 Nc6 9. 0-0 0-0 10. Re1 Bf6 11. Bc2 Ndb4 12. Be3 Nxc2 13. Qxc2 b6 14. Rad1 Bb7 15. a3 Ne7 16. Ng5 g6 17. Nge4 Bg7 18. Bg5 f6 19. Bf4 Nd5 20. Qd2 Qd7 21. Bh6 Rad8 22. Bxg7 Kxg7 23. Qd3 Ne7 24. Ng3 Nd5 25. Nge2 Qd6 26. Qh3 Rfe8 27. Ne4 Qd7 28. Qh4 Qf7 29. Rd2 Ne7 30. f3 Nf5 31. Qf2 Rd7 32. N4g3 Nxg3 33. hxg3 e5 34. Nc3 Red8 35. Red1 Rxd4 36. Rxd4 Rxd4 37. Rxd4 exd4 38. Qxd4 Qe7 39. Kf2 Kf7 40. Nb5 Ba6 41. Nd6+ Kg7 42. Ne4 Bb7 43. Nc3 h5 44. Ne2 Kf7 45. Nf4 Qc7 46. b4 Qc2+ 47. Kg1 Qc1+ 48. Kh2 Qc7 49. Qd3 f5 50. Qb3+ Ke8 51. Qg8+ Kd7 52. Qxg6 Qe5 53. Qxh5 a5 54. Qf7+ Kc8 55. Qg8+ Kd7 56. Qf7+ Kc6 57. Qc4+ Kd7 58. bxa5 bxa5 59. Nd3 Qh8+ 60. Qh4 Qc3 61. Qh7+ Kc6 62. Qxf5 Kb6 63. Qe6+ Ka7 64. Qe3+ Ka8 65. Qe8+ Ka7 66. Ne5 Qxa3 67. Nd7 Qd6 68. Qe3+ Ka8 69. Nb6+ Kb8 70. Nc4 Qc7 71. Qf4 a4 72. Kh3 Bd5 73. Nb6 Qxf4 74. gxf4 a3 75. Nd7+ Kc7 76. Nc5 a2 0-1

[Event "WCN k.o."]
[Site "Internet USCF"]
[Date "2001.??.??"]
[Round "?"]
[White "Wallace, John Paul"]
[Black "Diesen, Mark C"]
[Result "1-0"]
[ECO "D25"]
[WhiteElo "2370"]
[BlackElo "2410"]
[PlyCount "77"]
[EventDate "2001.12.??"]
[EventType "k.o."]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4 5. Bxc4 e6 6. h3 Bh5 7. Nc3 Nbd7 8. g4 Bg6 9. g5 Ne4 10. h4 h6 11. Rg1 Bb4 12. Bd2 Bxc3 13. Bxc3 Qe7 14. Nd2 hxg5 15. Nxe4 Bxe4 16. hxg5 0-0-0 17. Qb3 Rh5 18. Qb4 c5 19. dxc5 Rxg5 20. Rxg5 Qxg5 21. 0-0-0 Nxc5 22. Bd4 b6 23. a4 Rxd4 24. Rxd4 Qg1+ 25. Rd1 Qxf2 26. Qc3 a5 27. Ba6+ Kb8 28. Bc4 Nxa4 29. Qe5+ Ka7 30. Rd7+ Bb7 31. Qc7 Qxb2+ 32. Kd1 Nc3+ 33. Ke1 Qg2 34. Bf1 Qf3 35. Qxc3 g5 36. Be2 Qh1+ 37. Kd2 f5 38. Qc7 g4 39. Rd8 1-0

[Event "USChesslive.org"]
[Site "USChesslive INT"]
[Date "2000.10.08"]
[Round "1"]
[White "Diesen, Mark C"]
[Black "Atalik, Suat"]
[Result "0-1"]
[ECO "D88"]
[WhiteElo "2410"]
[BlackElo "2549"]
[PlyCount "114"]
[EventDate "2000.10.??"]
[EventType "game"]
[EventRounds "1"]
[EventCountry "USA"]
[SourceTitle "CBM 079"]
[Source "ChessBase"]
[SourceDate "2000.11.21"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.21"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 0-0 8. Ne2 Qd7 9. f3 c5 10. 0-0 Nc6 11. Be3 Na5 12. Bd3 cxd4 13. cxd4 b6 14. Rc1 e6 15. f4 Bb7 16. f5 exf5 17. exf5 Rfe8 18. Qd2 Rad8 19. Kh1 Rc8 20. Bh6 Qd5 21. Rf2 Rxc1+ 22. Qxc1 Bxd4 23. Nxd4 Qxd4 24. Qf1 Bd5 25. fxg6 hxg6 26. Bg5 Bc4 27. Bxc4 Qxc4 28. Qa1 Qd4 29. Qf1 Qe5 30. h4 f5 31. Qa6 Qd4 32. Rf3 Nc6 33. Qb7 Ne5 34. Rf1 Qd7 35. Qxd7 Nxd7 36. Rd1 Nc5 37. Rd6 Kf7 38. Rf6+ Kg7 39. Rc6 Ne6 40. Kh2 Kf7 41. Bc1 Re7 42. Bb2 Rd7 43. Bc3 Rc7 44. Rxc7+ Nxc7 45. Kh3 Nd5 46. Bd2 Nf6 47. Be3 Ke6 48. Kg3 Ke5 49. Bf4+ Ke4 50. Bb8 a6 51. Bc7 b5 52. Ba5 Nd5 53. Bd2 Ne3 54. Kh3 Kd3 55. Bc1 f4 56. g4 f3 57. Kg3 Ke2 0-1

[Event "USA-chT corr"]
[Site "Netherlands"]
[Date "1984.??.??"]
[Round "?"]
[White "Diesen, Mark C"]
[Black "Spiro, Barry R"]
[Result "1-0"]
[ECO "E61"]
[PlyCount "91"]
[EventDate "1984.??.??"]
[EventType "tourn (corr)"]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. e3 g6 4. Nc3 Bg7 5. Nf3 0-0 6. dxc5 Na6 7. e4 Nxc5 8. Qc2 d6 9. Be2 b6 10. Be3 Bb7 11. Nd2 Qd7 12. 0-0 Bc6 13. Rac1 Qb7 14. f3 a5 15. b3 Ne8 16. Nb5 Ne6 17. Nb1 N8c7 18. N1c3 Bxb5 19. cxb5 Nd4 20. Qd2 Nxe2+ 21. Qxe2 Rfc8 22. Rfd1 Ne6 23. Na4 Nc5 24. Nxc5 bxc5 25. a4 Bd4 26. Bxd4 cxd4 27. Qd2 e5 28. Rxc8+ Qxc8 29. Rc1 Qe6 30. Qc2 Kg7 31. Qc4 Qf6 32. Qd3 d5 33. Rc5 dxe4 34. Qxe4 Re8 35. f4 Qd6 36. Rd5 Qa3 37. fxe5 Qc1+ 38. Kf2 Rc8 39. h3 Qb2+ 40. Kg1 Qxb3 41. e6 Qe3+ 42. Qxe3 dxe3 43. e7 Kf6 44. Rd7 Re8 45. b6 Ke6 46. Rd3 1-0

[Event "WchT U26 02 fin-A"]
[Site "Mexico City"]
[Date "1980.09.02"]
[Round "8"]
[White "Giardelli, Sergio Carlos"]
[Black "Diesen, Mark C"]
[Result "1-0"]
[ECO "A25"]
[WhiteElo "2300"]
[BlackElo "2435"]
[PlyCount "63"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Argentina"]
[BlackTeam "United States"]
[WhiteTeamCountry "ARG"]
[BlackTeamCountry "USA"]

1. c4 g6 2. g3 Bg7 3. Bg2 d6 4. Nc3 e5 5. d3 f5 6. e3 Nf6 7. Nge2 0-0 8. 0-0 Nc6 9. Rb1 a5 10. b3 Kh8 11. Bb2 g5 12. f4 gxf4 13. exf4 Nd4 14. Qd2 c6 15. Rbe1 Rb8 16. Na4 b5 17. fxe5 dxe5 18. Nxd4 exd4 19. Qf4 Nd7 20. Nc5 Nxc5 21. Qxb8 Nxd3 22. Ba3 Rg8 23. Rd1 bxc4 24. bxc4 Ne5 25. Bc5 Nxc4 26. Qf4 Ne3 27. Rxd4 Nxg2 28. Rxd8 Nxf4 29. Rxg8+ Kxg8 30. Rxf4 Be6 31. Ra4 Bc3 32. Bb6 1-0

[Event "WchT U26 02 fin-A"]
[Site "Mexico City"]
[Date "1980.08.31"]
[Round "7"]
[White "Diesen, Mark C"]
[Black "Zapata, Alonso"]
[Result "0-1"]
[ECO "E63"]
[WhiteElo "2435"]
[BlackElo "1900"]
[PlyCount "82"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "United States"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "COL"]

1. c4 Nf6 2. Nc3 g6 3. d4 Bg7 4. Nf3 0-0 5. g3 d6 6. Bg2 Nc6 7. 0-0 a6 8. Qc2 Rb8 9. Rd1 Bd7 10. b3 b5 11. cxb5 axb5 12. Bb2 Nb4 13. Qb1 c6 14. e4 Qb6 15. Rd2 Rfd8 16. h3 c5 17. dxc5 Qxc5 18. Qd1 Nc6 19. Rc1 Qa7 20. Re2 e6 21. Qxd6 Be8 22. Qf4 Nh5 23. Qg5 Nb4 24. e5 Nd3 25. Rd1 f6 26. Qg4 b4 27. Red2 bxc3 28. Bxc3 f5 29. Qh4 Nxf2 30. Rxd8 Nxd1+ 31. Bd4 Qc7 32. Rxb8 Qxb8 33. Qg5 f4 34. gxf4 h6 35. Qg4 Qc8 36. Bf1 Qc1 37. Qxe6+ Bf7 38. Qd7 Ne3 39. Qb5 Nxf4 40. Kf2 Nxf1 41. Qxf1 Qc2+ 0-1

[Event "WchT U26 02 fin-A"]
[Site "Mexico City"]
[Date "1980.08.30"]
[Round "6"]
[White "Alvarez, Franklin"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "B16"]
[BlackElo "2435"]
[PlyCount "28"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Dominican Republic"]
[BlackTeam "United States"]
[WhiteTeamCountry "DOM"]
[BlackTeamCountry "USA"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Nf3 Bg4 7. Be2 e6 8. c3 Qc7 9. Qc2 Nd7 10. g3 Bf5 11. Bd3 Bxd3 12. Qxd3 0-0-0 13. Bf4 Qa5 14. Qe2 Qh5 1/2-1/2

[Event "WchT U26 02 fin-A"]
[Site "Mexico City"]
[Date "1980.08.27"]
[Round "4"]
[White "Diesen, Mark C"]
[Black "Dolmatov, Sergey"]
[Result "0-1"]
[ECO "D45"]
[WhiteElo "2435"]
[BlackElo "2535"]
[PlyCount "160"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "United States"]
[BlackTeam "Soviet Union"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "URS"]

1. c4 c6 2. d4 d5 3. Nc3 Nf6 4. Nf3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 0-0 8. Be2 Re8 9. 0-0 dxc4 10. bxc4 e5 11. Bb2 exd4 12. exd4 Nf8 13. Rad1 Qc7 14. Rfe1 Ng6 15. g3 Bg4 16. Ng5 Bxe2 17. Rxe2 Rxe2 18. Qxe2 Re8 19. Qd3 Qe7 20. Nf3 Qd7 21. Re1 Rxe1+ 22. Nxe1 Bb4 23. Nc2 Bxc3 24. Bxc3 b5 25. cxb5 cxb5 26. Ne3 Ne7 27. Bb4 Ned5 28. Nxd5 Nxd5 29. Qa3 Qc8 30. Qa5 a6 31. a4 Qe8 32. axb5 axb5 33. Bc5 h5 34. Qa6 Qd7 35. h4 Kh7 36. Qa3 Nf6 37. Qd3+ Kg8 38. Qf3 Qd5 39. Qf4 Kh7 40. Qb8 Qb3 41. Qe5 Qe6 42. Qb8 Qe1+ 43. Kg2 Qe4+ 44. Kg1 Qb1+ 45. Kg2 Kg6 46. Qd6 Qb3 47. Qf4 Qd5+ 48. f3 Qa2+ 49. Kh3 Qb1 50. Qg5+ Kh7 51. Kg2 Qc2+ 52. Kf1 Qg6 53. Qe5 Qb1+ 54. Qe1 Qxe1+ 55. Kxe1 Nd5 56. Kd2 f5 57. Bd6 g6 58. Kd3 Kg7 59. Ba3 Kf7 60. Bc1 Ke6 61. Bd2 Ne7 62. Bc1 Nd5 63. Bd2 Nb6 64. Ba5 Nc4 65. Be1 Kd5 66. Bb4 f4 67. gxf4 Nd6 68. Be1 Nf5 69. Bf2 b4 70. Be1 b3 71. Bf2 b2 72. Kc2 Nxd4+ 73. Kxb2 Nxf3 74. Kc1 Ke4 75. Bg3 Nd4 76. Bf2 Nf5 77. Kd2 Kxf4 78. Ke2 Kg4 79. Kf1 Nxh4 80. Kg1 Kh3 0-1

[Event "WchT U26 02 fin-A"]
[Site "Mexico City"]
[Date "1980.08.25"]
[Round "2"]
[White "Diesen, Mark C"]
[Black "Filguth, Rubens Alberto"]
[Result "0-1"]
[ECO "E41"]
[WhiteElo "2435"]
[BlackElo "2380"]
[PlyCount "172"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "United States"]
[BlackTeam "Brazil"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "BRA"]

1. d4 e6 2. c4 Nf6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6 8. e4 e5 9. d5 Ne7 10. 0-0 h6 11. Nh4 0-0 12. Qf3 Kh7 13. Qe2 Qe8 14. f4 Ng6 15. fxe5 Nxe5 16. Rxf6 gxf6 17. Bc2 Rg8 18. Qf2 Qe7 19. Bd2 Rg5 20. Rf1 Kg7 21. Nf3 Nxc4 22. Nxg5 fxg5 23. Be1 Ne5 24. Qe2 Bg4 25. Qd2 Bh5 26. a4 Bg6 27. Bg3 Re8 28. Qe2 Nd7 29. Qb5 Ne5 30. Bxe5+ Qxe5 31. Qxb7 Qxc3 32. Bb1 Qd4+ 33. Kh1 Qc4 34. Kg1 Qd4+ 35. Kh1 Qb4 36. Qxa7 Rb8 37. Bd3 Rb7 38. Qa6 Rb6 39. Qa7 c4 40. a5 Rb5 41. Qd4+ Kh7 42. Qxc4 Qxc4 43. Bxc4 Rxa5 44. e5 dxe5 45. d6 Kg7 46. g4 Ra8 47. Kg1 Rd8 48. Rd1 Bc2 49. Rd5 f6 50. Kf2 Bg6 51. Rd1 Bf7 52. Bb5 Be6 53. Kg3 Kf7 54. h3 Rb8 55. Ba4 Bc4 56. Bd7 Rb3+ 57. Kg2 Rd3 58. Rxd3 Bxd3 59. Kg3 Bc4 60. h4 Bd5 61. h5 Be6 62. Bc6 f5 63. gxf5 Bxf5 64. Bd5+ Kf6 65. Kf3 Bc2 66. Bc4 Bb1 67. Bb3 Bf5 68. Bd5 Bd7 69. Ke3 Kf5 70. Kf3 Be8 71. Ke3 Bd7 72. Kf3 g4+ 73. Ke3 Kg5 74. Bf7 Kf6 75. Bd5 Kf5 76. Bf7 Bc6 77. Bd5 Bd7 78. Bf7 Kg5 79. Ke4 g3 80. Kf3 Kh4 81. Kg2 Bc6+ 82. Kg1 e4 83. Bd5 e3 84. Kf1 Bb5+ 85. Ke1 Kh3 86. Be6+ Kh2 0-1

[Event "WchT U26 02 fin-A"]
[Site "Mexico City"]
[Date "1980.08.24"]
[Round "1"]
[White "Mestel, A Jonathan"]
[Black "Diesen, Mark C"]
[Result "1-0"]
[ECO "B92"]
[WhiteElo "2450"]
[BlackElo "2435"]
[PlyCount "79"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "England"]
[BlackTeam "United States"]
[WhiteTeamCountry "ENG"]
[BlackTeamCountry "USA"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. 0-0 0-0 9. Kh1 Be6 10. f4 Qc7 11. a4 Nbd7 12. a5 Rfc8 13. Be3 Bg4 14. Nd2 Bxe2 15. Qxe2 Qc6 16. Qd3 exf4 17. Bxf4 Nc5 18. Qf3 Ne6 19. Nd5 Bd8 20. c4 Nxf4 21. Qxf4 Qd7 22. Ne3 Rc5 23. Nf5 Re5 24. Ra3 Ne8 25. Rg3 Bf6 26. b4 Rc8 27. Qg4 Qe6 28. Qf3 Rc7 29. Qd3 g6 30. Ne3 Rh5 31. Nd5 Be5 32. Nxc7 Nxc7 33. Rh3 Rxh3 34. gxh3 Qe7 35. Nf3 Bf4 36. Nd4 Qe5 37. Qf3 g5 38. Ne2 Ne6 39. h4 Bxh2 40. Qg2 1-0

[Event "WchT U26 02 prel-4"]
[Site "Mexico City"]
[Date "1980.08.20"]
[Round "3"]
[White "Diesen, Mark C"]
[Black "Filguth, Rubens Alberto"]
[Result "1/2-1/2"]
[ECO "E12"]
[WhiteElo "2435"]
[BlackElo "2380"]
[PlyCount "27"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "United States"]
[BlackTeam "Brazil"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "BRA"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 d5 5. cxd5 exd5 6. Nc3 Be7 7. g3 0-0 8. Bg2 Bb7 9. 0-0 c5 10. Bf4 Na6 11. Ne5 Ne4 12. Nxe4 dxe4 13. dxc5 Nxc5 14. Qc2 1/2-1/2

[Event "WchT U26 02 prel-4"]
[Site "Mexico City"]
[Date "1980.08.19"]
[Round "2"]
[White "Athala, Jorge"]
[Black "Diesen, Mark C"]
[Result "0-1"]
[ECO "B20"]
[BlackElo "2435"]
[PlyCount "78"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Mexico II"]
[BlackTeam "United States"]
[WhiteTeamCountry "MEX"]
[BlackTeamCountry "USA"]

1. e4 c5 2. b4 cxb4 3. a3 d5 4. axb4 dxe4 5. Nc3 Nf6 6. Bb5+ Bd7 7. Qe2 Bxb5 8. Qxb5+ Qd7 9. Nge2 Nc6 10. Ng3 e6 11. Ba3 Nd4 12. Qxd7+ Nxd7 13. Kd1 f5 14. Nce2 Nxe2 15. Kxe2 Kf7 16. Rhb1 Rc8 17. Bb2 a6 18. Bc3 Rc7 19. b5 axb5 20. Rxb5 Bc5 21. Ba5 b6 22. Bb4 Rhc8 23. Bxc5 Rxc5 24. Rxc5 Rxc5 25. Ra7 Ke7 26. c3 Kd6 27. h4 Ra5 28. Rxa5 bxa5 29. Kd1 Nf6 30. Kc2 a4 31. Kb2 Kc5 32. Ne2 e5 33. Ka3 Kc4 34. Nc1 Ng4 35. f3 exf3 36. gxf3 Nh2 37. f4 exf4 38. Ne2 f3 39. Ng3 f2 0-1

[Event "WchT U26 02 prel-4"]
[Site "Mexico City"]
[Date "1980.08.18"]
[Round "1"]
[White "Diesen, Mark C"]
[Black "Juarez Flores, Gustavo Enrique"]
[Result "0-1"]
[ECO "A95"]
[WhiteElo "2435"]
[PlyCount "80"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "United States"]
[BlackTeam "Guatemala"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "GUA"]

1. d4 f5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. 0-0 0-0 6. c4 d5 7. Nc3 c6 8. b3 Qe8 9. Ne5 Nbd7 10. Nd3 Ne4 11. Bb2 Bf6 12. e3 b6 13. Rc1 Bb7 14. Ne2 Rc8 15. f3 Ng5 16. Ba3 Be7 17. Bxe7 Qxe7 18. b4 dxc4 19. Rxc4 e5 20. dxe5 Nxe5 21. Nxe5 Qxe5 22. Qb3 Nf7 23. f4 Qf6 24. Rfc1 Kh8 25. R4c3 Nd8 26. Nd4 Re8 27. Qc2 g6 28. Rd1 Qe7 29. Qb2 Kg7 30. Nxf5+ gxf5 31. Rxc6+ Kg8 32. Bd5+ Nf7 33. Re6 Qc7 34. Bb3 Rxe6 35. Bxe6 Rd8 36. Rc1 Qe7 37. Qe5 Re8 38. Bb3 Kf8 39. Bxf7 Qxe5 40. fxe5 Kxf7 0-1

[Event "USA-ch+"]
[Site "Greenville"]
[Date "1980.06.13"]
[Round "3"]
[White "Diesen, Mark C"]
[Black "Shamkovich, Leonid Alexandrovic"]
[Result "0-1"]
[ECO "B80"]
[WhiteElo "2435"]
[BlackElo "2515"]
[PlyCount "50"]
[EventDate "1980.06.11"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "USA"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f3 e6 7. Be3 a6 8. g4 h6 9. g5 hxg5 10. Bxg5 Be7 11. Qd2 Nxe4 12. Nxe4 Bxg5 13. Nxg5 Nxd4 14. Qxd4 Qxg5 15. Qxd6 Qh4+ 16. Kd2 Bd7 17. Rd1 Bc6 18. Ke3 Qf6 19. Be2 Qxb2 20. Rd4 Rh5 21. Rhd1 Qc3+ 22. Kf2 Qc5 23. Qc7 Rd5 24. c3 Rad8 25. Kg2 Rxd4 0-1

[Event "USA-ch+"]
[Site "Greenville"]
[Date "1980.06.12"]
[Round "2"]
[White "Evans, Larry Melvyn"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "A34"]
[WhiteElo "2520"]
[BlackElo "2435"]
[PlyCount "24"]
[EventDate "1980.06.11"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "USA"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 c5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nc7 6. d3 e5 7. Nf3 Nc6 8. 0-0 Be7 9. a3 0-0 10. Bd2 Be6 11. Rc1 f6 12. Ne4 Na6 1/2-1/2

[Event "USA-ch+"]
[Site "Greenville"]
[Date "1980.06.11"]
[Round "1"]
[White "Diesen, Mark C"]
[Black "Zaltsman, Vitaly F"]
[Result "1/2-1/2"]
[ECO "E59"]
[WhiteElo "2435"]
[BlackElo "2460"]
[PlyCount "69"]
[EventDate "1980.06.11"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "USA"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 0-0 7. 0-0 Nc6 8. a3 Bxc3 9. bxc3 dxc4 10. Bxc4 Qc7 11. Qc2 e5 12. Bb5 e4 13. Ng5 Bf5 14. f3 Qe7 15. fxe4 Bxe4 16. Nxe4 Nxe4 17. a4 Qe6 18. Bd3 Rfe8 19. Rf4 Nf6 20. Bd2 Rad8 21. Re1 b6 22. Bc1 Ne7 23. Qb2 Ng6 24. Rf2 Qd6 25. h3 Re7 26. a5 Kh8 27. axb6 axb6 28. Qc2 Kg8 29. Qa2 Qc6 30. Qb3 Rf8 31. c4 Qd6 32. Rd1 Qc7 33. Rb2 Rb8 34. d5 Qd6 35. Rf2 1/2-1/2

[Event "US Open-80"]
[Site "Chicago"]
[Date "1979.08.10"]
[Round "12"]
[White "Alburt, Lev O"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "E19"]
[WhiteElo "2515"]
[BlackElo "2460"]
[PlyCount "47"]
[EventDate "1979.07.29"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. 0-0 Be7 6. Nc3 0-0 7. d4 Ne4 8. Qc2 Nxc3 9. Qxc3 c5 10. b3 cxd4 11. Nxd4 Bxg2 12. Kxg2 a6 13. Qf3 Ra7 14. Rd1 Qc7 15. Bb2 Qb7 16. Rd2 Rc8 17. Rc1 Qxf3+ 18. Kxf3 Rac7 19. Rcd1 d6 20. Nc2 b5 21. Ba3 bxc4 22. Bxd6 Bxd6 23. Rxd6 Kf8 24. Rd8+ 1/2-1/2

[Event "US Open-80"]
[Site "Chicago"]
[Date "1979.08.09"]
[Round "11"]
[White "Diesen, Mark C"]
[Black "Bisguier, Arthur Bernard"]
[Result "1/2-1/2"]
[ECO "D31"]
[WhiteElo "2487"]
[BlackElo "2445"]
[PlyCount "17"]
[EventDate "1979.07.29"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 e6 3. c4 c6 4. Nc3 dxc4 5. e3 b5 6. a4 Bb4 7. Bd2 a5 8. Ne5 Bb7 9. Qg4 1/2-1/2

[Event "US Open-80"]
[Site "Chicago"]
[Date "1979.08.08"]
[Round "10"]
[White "Bradford, Joseph M"]
[Black "Diesen, Mark C"]
[Result "0-1"]
[ECO "E69"]
[WhiteElo "2398"]
[BlackElo "2460"]
[PlyCount "100"]
[EventDate "1979.07.29"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. d4 0-0 5. c4 d6 6. Nc3 Nbd7 7. 0-0 e5 8. h3 c6 9. e4 Qb6 10. Re1 a5 11. Na4 Qd8 12. dxe5 dxe5 13. c5 Qe7 14. Qc2 Ne8 15. Bg5 f6 16. Be3 Nc7 17. Nh4 Ne6 18. Rad1 Re8 19. Rd2 Bf8 20. Rc1 Bg7 21. Rcd1 Bf8 22. Rc1 Bg7 23. Kh2 Qf7 24. b3 Rf8 25. Bf1 f5 26. exf5 gxf5 27. Bc4 f4 28. Rd6 Nf6 29. Nb6 fxe3 30. Nxc8 Nd5 31. Nb6 Nd4 32. Qe4 Qxf2+ 33. Kh1 Qxg3 34. Nxa8 Qxh3+ 35. Kg1 Qg3+ 36. Kh1 Rf4 37. Rd8+ Kf7 38. Bxd5+ Ke7 39. Nf5+ Nxf5 40. Qg2 Kxd8 41. Be6 Rf2 42. Rd1+ Ke7 43. Rd7+ Kxe6 44. Rd6+ Ke7 45. Qxg3 Nxg3+ 46. Kg1 Ne2+ 47. Kh1 Nd4 48. Nb6 Nf3 49. Rd7+ Ke6 50. Rd6+ Kf5 0-1

[Event "US Open-80"]
[Site "Chicago"]
[Date "1979.08.07"]
[Round "9"]
[White "Diesen, Mark C"]
[Black "La Rota, Fabio"]
[Result "1-0"]
[ECO "E11"]
[WhiteElo "2487"]
[BlackElo "2310"]
[PlyCount "75"]
[EventDate "1979.07.29"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 e6 2. c4 d5 3. d4 Nf6 4. g3 Bb4+ 5. Bd2 Bxd2+ 6. Nbxd2 0-0 7. Qc2 c6 8. Bg2 Nbd7 9. 0-0 Re8 10. Rfe1 b6 11. b4 Bb7 12. e4 dxe4 13. Nxe4 Nxe4 14. Qxe4 Qe7 15. a3 a5 16. c5 axb4 17. axb4 Nf6 18. Qc2 b5 19. Nd2 Qf8 20. Nb3 Rxa1 21. Rxa1 Ra8 22. Rxa8 Qxa8 23. Na5 Qc8 24. Qe2 Ba8 25. Qe5 Nd5 26. Bxd5 exd5 27. h4 h6 28. h5 Kh7 29. Qe7 Qe6 30. Qxe6 fxe6 31. Kg2 g5 32. Kf3 Kg7 33. Kg4 Kf6 34. f4 gxf4 35. Kxf4 Kf7 36. Ke5 Ke7 37. g4 Kf7 38. Kd6 1-0

[Event "US Open-80"]
[Site "Chicago"]
[Date "1979.08.05"]
[Round "7"]
[White "Diesen, Mark C"]
[Black "Gheorghiu, Florin"]
[Result "0-1"]
[ECO "E90"]
[WhiteElo "2460"]
[BlackElo "2540"]
[PlyCount "98"]
[EventDate "1979.07.29"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 Bg7 5. e4 d6 6. Nf3 0-0 7. Bf4 Nh5 8. Bg5 h6 9. Be3 e5 10. Nd2 Nd7 11. h3 Ndf6 12. g3 Bd7 13. a3 b6 14. Bg2 Nh7 15. Bf3 N5f6 16. g4 Kh8 17. Nf1 Ng8 18. h4 Bf6 19. g5 hxg5 20. h5 Kg7 21. hxg6 fxg6 22. Nh2 Nh6 23. Qe2 Be7 24. 0-0-0 Nf7 25. Ng4 Rh8 26. Rh2 Nf6 27. Rxh8 Qxh8 28. Nxf6 Bxf6 29. Rh1 Qc8 30. Qf1 g4 31. Be2 Bg5 32. Nd1 Qd8 33. Qg2 Nh6 34. Kc2 Qf6 35. Kd2 Rf8 36. Qh2 Bf4 37. Bxf4 Qxf4+ 38. Ne3 Qxh2 39. Rxh2 Rf4 40. Kd3 Ng8 41. Rg2 Nf6 42. Kc2 Rxe4 43. Bd3 Rf4 44. b4 Ne4 45. Bxe4 Rxe4 46. Kd3 Rd4+ 47. Ke2 Bf5 48. bxc5 bxc5 49. f3 gxf3+ 0-1

[Event "US Open-80"]
[Site "Chicago"]
[Date "1979.08.03"]
[Round "6"]
[White "Pelts, Roman"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "D41"]
[BlackElo "2460"]
[PlyCount "32"]
[EventDate "1979.07.29"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. g3 e6 5. Bg2 d5 6. cxd5 Nxd5 7. 0-0 Be7 8. d4 0-0 9. Nxd5 exd5 10. dxc5 Bxc5 11. Ng5 h6 12. Qc2 Bxf2+ 13. Rxf2 hxg5 14. Qd2 Be6 15. Qxg5 Qxg5 16. Bxg5 f6 1/2-1/2

[Event "US Open-80"]
[Site "Chicago"]
[Date "1979.08.02"]
[Round "5"]
[White "Diesen, Mark C"]
[Black "Pupols, Viktors"]
[Result "1-0"]
[ECO "D45"]
[WhiteElo "2460"]
[PlyCount "115"]
[EventDate "1979.07.29"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 c6 3. c4 e6 4. Nc3 Nf6 5. Qc2 Nbd7 6. e4 Nxe4 7. Nxe4 dxe4 8. Qxe4 Bb4+ 9. Bd2 Bxd2+ 10. Nxd2 Nf6 11. Qe3 0-0 12. Be2 Qb6 13. Qc3 c5 14. dxc5 Qxc5 15. 0-0 b6 16. Bf3 Rb8 17. Nb3 Qc7 18. c5 bxc5 19. Nxc5 Qb6 20. Rab1 e5 21. Qxe5 Bg4 22. Bxg4 Nxg4 23. Qf5 g6 24. Qxg4 Qxc5 25. Qf4 Rb4 26. Rfc1 Qb6 27. Qe5 Rb5 28. Qc3 Rd8 29. b4 Rbd5 30. a4 Qa6 31. a5 Qe2 32. Re1 Rd1 33. h3 R8d2 34. Qe3 Rxb1 35. Qxe2 Rxe2 36. Rxb1 Ra2 37. Rc1 Rb2 38. Rc7 Rxb4 39. Rxa7 Ra4 40. a6 h5 41. g3 Ra3 42. Kg2 Kg7 43. g4 hxg4 44. hxg4 Kf6 45. f3 Kg5 46. Kg3 f5 47. gxf5 Kxf5 48. Ra8 Kf6 49. Kg4 Kg7 50. Kf4 Kf6 51. Ke4 Kg5 52. a7 Ra1 53. f4+ Kg4 54. Ke5 Ra6 55. f5 Ra5+ 56. Kf6 Ra6+ 57. Ke5 Ra5+ 58. Kd4 1-0

[Event "US Open-80"]
[Site "Chicago"]
[Date "1979.08.01"]
[Round "4"]
[White "Lipking, Laurence"]
[Black "Diesen, Mark C"]
[Result "0-1"]
[ECO "B09"]
[BlackElo "2487"]
[PlyCount "94"]
[EventDate "1979.07.29"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 g6 3. e4 d6 4. f4 Bg7 5. Nf3 c5 6. dxc5 Qa5 7. Bd3 Qxc5 8. Qe2 Bg4 9. Be3 Qa5 10. 0-0 Nc6 11. h3 Bxf3 12. Qxf3 0-0 13. a3 Nd7 14. Nd1 Rac8 15. c3 Qc7 16. Bf2 Na5 17. Ne3 a6 18. a4 e6 19. Rad1 Nc6 20. Kh1 Nc5 21. Bc2 b5 22. axb5 axb5 23. Rd2 b4 24. Nc4 bxc3 25. bxc3 Nxe4 26. Bxe4 d5 27. Bxd5 exd5 28. Nb6 Ne7 29. Nxc8 Rxc8 30. Bd4 Bxd4 31. cxd4 Qa5 32. Qf2 Nf5 33. Rd3 Qb5 34. Rdd1 Rc3 35. Rfe1 Ng3+ 36. Kh2 Ne4 37. Qh4 Qb8 38. Rb1 Qd6 39. Ra1 Kg7 40. Kg1 Qb4 41. Red1 Rc2 42. Rab1 Qa3 43. f5 Qe3+ 44. Kh2 g5 45. Qg4 h5 46. f6+ Kg6 47. Rb3 Qxb3 0-1

[Event "US Open-80"]
[Site "Chicago"]
[Date "1979.07.31"]
[Round "3"]
[White "Diesen, Mark C"]
[Black "Holzmueller, Kevin"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "2487"]
[BlackElo "2058"]
[PlyCount "87"]
[EventDate "1979.07.29"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 0-0 6. Nd5 Re8 7. Qf5 d6 8. Nxf6+ Qxf6 9. Qxf6 gxf6 10. a3 Bc5 11. b3 Bf5 12. Bb2 Rad8 13. d3 Bg6 14. Rc1 Bb6 15. Be2 f5 16. b4 e4 17. dxe4 fxe4 18. Nh4 Ne5 19. 0-0 c6 20. Rfd1 Bc7 21. Rd2 f6 22. Nxg6 hxg6 23. Bd4 a6 24. Rb1 Kg7 25. a4 Re7 26. c5 dxc5 27. bxc5 Ba5 28. Rdd1 Nf7 29. h4 Rh8 30. g3 Nd8 31. Bc4 Nf7 32. Rb3 Rh7 33. Kf1 Ne5 34. Bxe5 fxe5 35. Be2 Kf6 36. Bg4 Rhf7 37. Rdb1 Kg7 38. Bc8 Bd2 39. Ke2 Ba5 40. Rxb7 Rxb7 41. Bxb7 Bc3 42. Bxc6 Kf6 43. Bxe4 a5 44. Rb6+ 1-0

[Event "US Open-80"]
[Site "Chicago"]
[Date "1979.07.30"]
[Round "2"]
[White "Walter, Kenneth"]
[Black "Diesen, Mark C"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1830"]
[BlackElo "2487"]
[PlyCount "50"]
[EventDate "1979.07.29"]
[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. c3 d5 3. exd5 Qxd5 4. d4 e6 5. Nf3 Nf6 6. Na3 Nc6 7. Nb5 Qd8 8. Bf4 Nd5 9. Bg3 a6 10. Na3 cxd4 11. Nxd4 Nxc3 12. bxc3 Bxa3 13. Nxc6 Qxd1+ 14. Rxd1 bxc6 15. Be2 Ke7 16. Bf3 Bd7 17. 0-0 f6 18. Rd2 e5 19. Rfd1 Rhd8 20. Be2 a5 21. Bd3 Be6 22. f4 Bc5+ 23. Kf1 Be3 24. Rc2 exf4 25. Bf2 Bg4 0-1

[Event "US Open-80"]
[Site "Chicago"]
[Date "1979.07.29"]
[Round "1"]
[White "Diesen, Mark C"]
[Black "Brownstein, Daniel"]
[Result "1-0"]
[ECO "A18"]
[WhiteElo "2487"]
[BlackElo "1639"]
[PlyCount "43"]
[EventDate "1979.07.29"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e6 3. e4 Bb4 4. e5 Bxc3 5. bxc3 Ng8 6. Qg4 Kf8 7. Ba3+ Ne7 8. d4 Nbc6 9. Qf4 Kg8 10. h4 Ng6 11. Qg3 h5 12. Bd3 Nce7 13. Qg5 Qe8 14. Ne2 Nf5 15. Ng3 Nxg3 16. fxg3 Rh6 17. 0-0 b6 18. Rf6 gxf6 19. Qxh6 fxe5 20. Bxg6 fxg6 21. Rf1 d6 22. Rf6 1-0

[Event "Karlovac"]
[Site "Karlovac"]
[Date "1979.06.30"]
[Round "13"]
[White "Diesen, Mark C"]
[Black "Nemet, Ivan"]
[Result "1/2-1/2"]
[ECO "B52"]
[WhiteElo "2409"]
[BlackElo "2348"]
[PlyCount "26"]
[EventDate "1979.06.16"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[EventCategory "8"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. 0-0 Nf6 6. Re1 Nc6 7. c3 e6 8. d4 cxd4 9. cxd4 d5 10. e5 Ne4 11. Nbd2 Nxd2 12. Bxd2 Be7 13. Rc1 0-0 1/2-1/2

[Event "Karlovac"]
[Site "Karlovac"]
[Date "1979.06.28"]
[Round "12"]
[White "Rodriguez Vargas, Orestes"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "E15"]
[WhiteElo "2361"]
[BlackElo "2409"]
[PlyCount "20"]
[EventDate "1979.06.16"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[EventCategory "8"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 Nf6 2. d4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 6. Bd2 Be7 7. Bg2 c6 8. 0-0 d5 9. Qc2 0-0 10. Bg5 Nbd7 1/2-1/2

[Event "Karlovac"]
[Site "Karlovac"]
[Date "1979.06.27"]
[Round "11"]
[White "Diesen, Mark C"]
[Black "Kovacevic, Vlatko"]
[Result "1/2-1/2"]
[ECO "E20"]
[WhiteElo "2409"]
[BlackElo "2454"]
[PlyCount "25"]
[EventDate "1979.06.16"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[EventCategory "8"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3 0-0 5. Bg2 d5 6. Nf3 dxc4 7. 0-0 Nbd7 8. Qc2 c6 9. e4 h6 10. a4 Re8 11. Rd1 Qa5 12. e5 Nd5 13. Ne4 1/2-1/2

[Event "Karlovac"]
[Site "Karlovac"]
[Date "1979.06.26"]
[Round "10"]
[White "Balashov, Yuri S"]
[Black "Diesen, Mark C"]
[Result "1-0"]
[ECO "B09"]
[WhiteElo "2408"]
[BlackElo "2409"]
[PlyCount "86"]
[EventDate "1979.06.16"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[EventCategory "8"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 c5 6. dxc5 Qa5 7. Bd3 Qxc5 8. Qe2 Bg4 9. Be3 Qa5 10. 0-0 Nc6 11. h3 Bxf3 12. Qxf3 0-0 13. a3 Nd7 14. Bd2 Qb6+ 15. Kh1 Nc5 16. Rab1 Nxd3 17. cxd3 f5 18. Nd5 Qd8 19. exf5 gxf5 20. Bc3 e6 21. Nb4 Rc8 22. Rbc1 Qd7 23. Bxg7 Kxg7 24. Qe3 Kf7 25. Nc2 Rg8 26. Nd4 Nxd4 27. Qxd4 b6 28. Rxc8 Rxc8 29. Re1 Qc6 30. Qe3 Qd5 31. Qe2 Kf6 32. Qh5 Rg8 33. Qh6+ Kf7 34. Re2 Rg7 35. Rc2 Qb7 36. Qh5+ Kf8 37. Qh4 Re7 38. Qf6+ Kg8 39. Re2 Qd7 40. Re3 e5 41. Rg3+ Rg7 42. Rxg7+ Qxg7 43. Qxd6 exf4 1-0

[Event "Karlovac"]
[Site "Karlovac"]
[Date "1979.06.25"]
[Round "9"]
[White "Diesen, Mark C"]
[Black "Tatai, Stefano"]
[Result "1/2-1/2"]
[ECO "E58"]
[WhiteElo "2409"]
[BlackElo "2313"]
[PlyCount "31"]
[EventDate "1979.06.16"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[EventCategory "8"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 d5 7. 0-0 0-0 8. a3 Bxc3 9. bxc3 Qc7 10. cxd5 exd5 11. Nh4 Ne7 12. a4 Re8 13. Ba3 c4 14. Bc2 Ng6 15. Nf5 Ne4 16. Bxe4 1/2-1/2

[Event "Karlovac"]
[Site "Karlovac"]
[Date "1979.06.24"]
[Round "8"]
[White "Bellon Lopez, Juan Manuel"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "B82"]
[WhiteElo "2324"]
[BlackElo "2409"]
[PlyCount "82"]
[EventDate "1979.06.16"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[EventCategory "8"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nc3 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. e4 d6 6. Nb3 e6 7. Be3 Be7 8. f4 0-0 9. Bd3 a6 10. Qf3 Qc7 11. 0-0-0 b5 12. g4 Nb4 13. Kb1 Bb7 14. g5 Nd7 15. Rhg1 Nxd3 16. cxd3 d5 17. Rc1 dxe4 18. Nxe4 Qd6 19. Bd4 a5 20. Qe3 Bxe4 21. dxe4 e5 22. fxe5 Nxe5 23. Bc5 Qc7 24. Qg3 Rfc8 25. Bb4 Nc4 26. Qxc7 Rxc7 27. Bxe7 Rxe7 28. Nd4 Nd2+ 29. Ka1 b4 30. Rcd1 Nxe4 31. Nc6 Ree8 32. Rd5 f6 33. gxf6 Nxf6 34. Rxa5 Rxa5 35. Nxa5 Re2 36. Nc6 Nd5 37. Rd1 Rxh2 38. a4 bxa3 39. Rxd5 axb2+ 40. Kb1 h5 41. Ne5 Rg2 1/2-1/2

[Event "Karlovac"]
[Site "Karlovac"]
[Date "1979.06.23"]
[Round "7"]
[White "Diesen, Mark C"]
[Black "Brkic, Djordje"]
[Result "1-0"]
[ECO "E12"]
[WhiteElo "2409"]
[BlackElo "2170"]
[PlyCount "83"]
[EventDate "1979.06.16"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[EventCategory "8"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. Nc3 Bb4 5. Bg5 Bb7 6. e3 c5 7. Bd3 d5 8. cxd5 Bxc3+ 9. bxc3 exd5 10. 0-0 0-0 11. dxc5 bxc5 12. Qb1 Qc7 13. Bxf6 gxf6 14. Bxh7+ Kg7 15. Bf5 Rh8 16. h3 Nc6 17. Qb5 Ne5 18. Nxe5 fxe5 19. e4 Rh6 20. Qd3 Ba6 21. Qg3+ Kh8 22. Rfd1 Bc4 23. exd5 Qd6 24. Qg4 Ba6 25. Qe4 Re8 26. Re1 Bb5 27. Rab1 Qa6 28. Qe3 Rf6 29. Qg5 Rg8 30. Qh5+ Rh6 31. Qxf7 Bd3 32. Rbd1 Be2 33. Rd2 Bf3 34. g3 Qd6 35. Qd7 Qf6 36. Rd3 e4 37. Bxe4 Bh5 38. Qf5 Qd6 39. Rde3 Bg6 40. Qe6 Qf8 41. Bxg6 Rhxg6 42. Qxg6 1-0

[Event "Karlovac"]
[Site "Karlovac"]
[Date "1979.06.21"]
[Round "6"]
[White "Kurajica, Bojan"]
[Black "Diesen, Mark C"]
[Result "1-0"]
[ECO "C16"]
[WhiteElo "2528"]
[BlackElo "2409"]
[PlyCount "79"]
[EventDate "1979.06.16"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[EventCategory "8"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Qd7 5. Bd2 b6 6. Nf3 Bf8 7. b3 Ba6 8. Bxa6 Nxa6 9. 0-0 c5 10. a4 Rc8 11. Nb5 Nb4 12. c3 Nc6 13. dxc5 bxc5 14. Qe2 Rb8 15. b4 h5 16. bxc5 Bxc5 17. Be3 Be7 18. c4 a6 19. cxd5 exd5 20. Nd6+ Kf8 21. Qxa6 f6 22. Nh4 Nxe5 23. f4 Qxd6 24. Qxd6 Bxd6 25. fxe5 Bxe5 26. Ng6+ Ke8 27. Rae1 Rh7 28. Bd4 Rb1 29. Nxe5 Rxe1 30. Rxe1 fxe5 31. Rxe5+ Kd7 32. Rxd5+ Kc6 33. Rg5 Ne7 34. Bxg7 h4 35. h3 Nd5 36. a5 Nf4 37. Be5 Nd3 38. Bd4 Rb7 39. a6 Rb4 40. a7 1-0

[Event "Karlovac"]
[Site "Karlovac"]
[Date "1979.06.20"]
[Round "5"]
[White "Diesen, Mark C"]
[Black "Rogulj, Branko"]
[Result "1-0"]
[ECO "B04"]
[WhiteElo "2409"]
[BlackElo "2410"]
[PlyCount "83"]
[EventDate "1979.06.16"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[EventCategory "8"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Nc6 5. c4 Nb6 6. exd6 cxd6 7. h3 e5 8. d5 Nb8 9. Nc3 Be7 10. Be2 0-0 11. 0-0 Na6 12. a3 Bd7 13. Be3 Rc8 14. b3 f5 15. Re1 Bf6 16. Bf1 e4 17. Nd4 Nc5 18. Rb1 Be5 19. f4 exf3 20. Qxf3 Qh4 21. Nce2 Rce8 22. g3 Qf6 23. Bg2 Ne4 24. Rbd1 g5 25. g4 fxg4 26. Qxe4 Bh2+ 27. Kxh2 Rxe4 28. Bxe4 Qe5+ 29. Ng3 h5 30. Bg1 Qh8 31. Bg6 h4 32. Ngf5 g3+ 33. Kg2 Nc8 34. Ne6 Qb2+ 35. Kh1 Rxf5 36. Bxf5 Qxb3 37. Bg4 Qxc4 38. Rd4 Qb3 39. Rf1 Ne7 40. Rf8+ Kh7 41. Rf7+ Kh8 42. Rd2 1-0

[Event "Karlovac"]
[Site "Karlovac"]
[Date "1979.06.19"]
[Round "4"]
[White "Vadasz, Laszlo"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "E68"]
[WhiteElo "1730"]
[BlackElo "2409"]
[PlyCount "82"]
[EventDate "1979.06.16"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[EventCategory "8"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 d6 6. d4 Nbd7 7. Nc3 e5 8. e4 c6 9. Rb1 exd4 10. Nxd4 Re8 11. h3 Qb6 12. Be3 Qb4 13. Re1 Ne5 14. a3 Qa5 15. Bf1 Be6 16. Nxe6 Rxe6 17. b4 Qc7 18. Rc1 Qe7 19. f4 Ned7 20. Bg2 Nxe4 21. Nxe4 f5 22. Ng5 Rxe3 23. Bd5+ cxd5 24. Qxd5+ Kf8 25. Nxh7+ Ke8 26. Kf2 Nb6 27. Qd2 Re4 28. Ng5 Rc8 29. Nxe4 fxe4 30. Rxe4 Qxe4 31. Re1 Qxe1+ 32. Qxe1+ Kf7 33. Qe4 Rc7 34. f5 gxf5 35. Qxf5+ Ke7 36. Qe4+ Kf7 37. Qf4+ Ke6 38. Qe4+ Be5 39. Qg6+ Ke7 40. Qh7+ Kd8 41. Qg8+ Kd7 1/2-1/2

[Event "Karlovac"]
[Site "Karlovac"]
[Date "1979.06.18"]
[Round "3"]
[White "Diesen, Mark C"]
[Black "Pisar, Milan"]
[Result "1-0"]
[ECO "E07"]
[WhiteElo "2409"]
[BlackElo "2022"]
[PlyCount "64"]
[EventDate "1979.06.16"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[EventCategory "8"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 Be7 5. Bg2 0-0 6. 0-0 c6 7. Nc3 Nbd7 8. Qd3 b6 9. e4 Bb7 10. Rd1 Qc8 11. e5 dxc4 12. Qxc4 Nd5 13. Bg5 Nxc3 14. bxc3 Qd8 15. Bxe7 Qxe7 16. Nd2 b5 17. Qb3 Rfb8 18. a4 a6 19. Rdb1 h6 20. Qc2 Nb6 21. a5 Nd7 22. c4 c5 23. Bxb7 Rxb7 24. Qe4 Rab8 25. cxb5 axb5 26. Nc4 cxd4 27. Nd6 Rc7 28. a6 Nc5 29. Qxd4 Ra8 30. a7 f6 31. Rxb5 fxe5 32. Qxe5 Raxa7 1-0

[Event "Karlovac"]
[Site "Karlovac"]
[Date "1979.06.17"]
[Round "2"]
[White "Bukal, Vladimir Sr"]
[Black "Diesen, Mark C"]
[Result "0-1"]
[ECO "A16"]
[WhiteElo "2403"]
[BlackElo "2409"]
[PlyCount "68"]
[EventDate "1979.06.16"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[EventCategory "8"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 0-0 5. Nf3 d5 6. cxd5 Nxd5 7. 0-0 Nc6 8. Re1 Nb6 9. d3 e5 10. Bg5 f6 11. Bd2 f5 12. b4 Kh8 13. b5 Nd4 14. Nxd4 exd4 15. Na4 Rb8 16. Rc1 Nd5 17. Qb3 Be6 18. Nc5 Bg8 19. Qa4 Qd6 20. e3 dxe3 21. fxe3 Rfe8 22. Kh1 b6 23. Na6 Rbc8 24. Rc6 Qd7 25. Qh4 Ne7 26. Nb4 Nxc6 27. Bxc6 Qd6 28. Bxe8 Rxe8 29. Qf4 Be5 30. Qf3 c5 31. bxc6 a5 32. Nc2 Qxd3 33. Qd1 Qe4+ 34. Kg1 Bd5 0-1

[Event "Karlovac"]
[Site "Karlovac"]
[Date "1979.06.16"]
[Round "1"]
[White "Diesen, Mark C"]
[Black "Hulak, Krunoslav"]
[Result "0-1"]
[ECO "A33"]
[WhiteElo "2409"]
[BlackElo "2453"]
[PlyCount "76"]
[EventDate "1979.06.16"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[EventCategory "8"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nf3 c5 2. c4 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bc5 7. Nb3 Be7 8. Bg2 0-0 9. 0-0 d6 10. Nd4 Bd7 11. Ndb5 Qb8 12. Bg5 a6 13. Bxf6 gxf6 14. Nd4 Qa7 15. e3 Rac8 16. Qg4+ Kh8 17. Nxc6 Bxc6 18. Rfd1 Qc5 19. Rd4 f5 20. Qd1 Rfd8 21. Qh5 Bf6 22. Rad1 Bxg2 23. Qxf7 Bxd4 24. Rxd4 Rf8 25. Qxe6 Qe5 26. Qh6 Rf6 27. Qh5 Bc6 28. Rh4 Rc7 29. Rf4 Rg7 30. Kf1 Qe6 31. Rh4 f4 32. Nd5 Rf5 33. Nxf4 Qxc4+ 34. Qe2 Qc1+ 35. Qe1 Bb5+ 36. Ne2 Qxe3 37. a4 Rgf7 38. f4 Qf3+ 0-1

[Event "Lone Pine op Louis D. Statham Masters"]
[Site "Lone Pine"]
[Date "1979.04.04"]
[Round "9"]
[White "Shamkovich, Leonid Alexandrovic"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "B85"]
[WhiteElo "2495"]
[BlackElo "2460"]
[PlyCount "110"]
[EventDate "1979.03.25"]
[EventType "swiss"]
[EventRounds "9"]
[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. Nc3 Nf6 4. d4 cxd4 5. Nxd4 e6 6. Be2 Be7 7. 0-0 0-0 8. f4 a6 9. Be3 Qc7 10. g4 Nfd7 11. g5 Re8 12. a4 Nc6 13. Rf2 Bf8 14. Qf1 Nb4 15. Qh3 e5 16. fxe5 dxe5 17. Nf5 Nb6 18. Raf1 Be6 19. Qg3 Kh8 20. Nd4 Bc4 21. Bxc4 Qxc4 22. Nb3 Nc8 23. Rxf7 Nd6 24. Na5 Qe6 25. R7f2 Rac8 26. Qf3 Be7 27. Qd1 Kg8 28. Rg2 Bd8 29. Nb3 Nc4 30. Bc1 Bb6+ 31. Kh1 Rf8 32. Rg3 Rxf1+ 33. Qxf1 Nxc2 34. Nd5 Nd4 35. Nd2 Nxd2 36. Bxd2 Rc2 37. Rc3 Rxc3 38. bxc3 Nb3 39. Be1 Ba7 40. Qc4 Nc5 41. Bf2 Qf7 42. Ne7+ Kf8 43. Qxf7+ Kxf7 44. Nc8 Nxa4 45. Bxa7 Nxc3 46. Nd6+ Ke6 47. Bc5 a5 48. Nxb7 Nxe4 49. Bf8 a4 50. Kg2 g6 51. h4 Kf5 52. Nd6+ Nxd6 53. Bxd6 Kg4 54. Bxe5 Kxh4 55. Bf6 Kh5 1/2-1/2

[Event "Lone Pine op Louis D. Statham Masters"]
[Site "Lone Pine"]
[Date "1979.04.03"]
[Round "8"]
[White "Kortschnoj, Viktor Lvovich"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "A19"]
[WhiteElo "2695"]
[BlackElo "2460"]
[PlyCount "71"]
[EventDate "1979.03.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e6 3. e4 c5 4. e5 Ng8 5. d4 cxd4 6. Qxd4 Nc6 7. Qe4 Bb4 8. Bd2 d6 9. exd6 Nf6 10. Qh4 Bxd6 11. 0-0-0 Bd7 12. Nf3 h6 13. Nb5 Be7 14. Bd3 Nb4 15. Bxb4 Bxb4 16. Bc2 Qb8 17. Qd4 0-0 18. Nd6 Bxd6 19. Qxd6 Qxd6 20. Rxd6 Bc6 21. Ne5 Be4 22. f3 Bxc2 23. Kxc2 Rfd8 24. Rhd1 Rxd6 25. Rxd6 Rc8 26. Kd3 Kf8 27. b4 Ke7 28. Rd4 Rc7 29. h4 g5 30. a3 Nh5 31. hxg5 hxg5 32. Kc3 f6 33. Ng4 b6 34. Ne3 Nf4 35. Rd2 Rd7 36. Rxd7+ 1/2-1/2

[Event "Lone Pine op Louis D. Statham Masters"]
[Site "Lone Pine"]
[Date "1979.04.02"]
[Round "7"]
[White "Diesen, Mark C"]
[Black "Da Cunha, Marcos Paolozzi"]
[Result "1-0"]
[ECO "E91"]
[WhiteElo "2460"]
[BlackElo "2375"]
[PlyCount "125"]
[EventDate "1979.03.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 d6 5. e4 Bg7 6. Nf3 0-0 7. Bf4 e5 8. dxe6 Bxe6 9. Bxd6 Re8 10. Be2 Nc6 11. 0-0 Nd4 12. e5 Nd7 13. Nxd4 cxd4 14. Qxd4 Nxe5 15. Bxe5 Qxd4 16. Bxd4 Bxd4 17. Rac1 Rac8 18. b3 a6 19. Bf3 b5 20. Bb7 Rc5 21. Ne4 Rc7 22. Bxa6 bxc4 23. Nd6 Ra8 24. Bxc4 Rxa2 25. Nb5 Rd7 26. Nxd4 Rxd4 27. Bxe6 fxe6 28. Rc7 Rdd2 29. g3 Rab2 30. b4 Rd8 31. Rb7 Rf8 32. f4 Rf7 33. Rb6 Rc7 34. Rf2 Rcc2 35. Rxc2 Rxc2 36. Rxe6 Kf7 37. Rb6 Rb2 38. Rb7+ Kf6 39. g4 h5 40. h3 hxg4 41. hxg4 Ke6 42. Rb5 Kf6 43. Rb6+ Kf7 44. g5 Ke7 45. Kf1 Kf7 46. b5 Ke7 47. Rxg6 Rxb5 48. Kf2 Rb3 49. Rf6 Rh3 50. Rf5 Ke6 51. Re5+ Kf7 52. Re3 Rh1 53. Kf3 Rg1 54. Ra3 Kg7 55. Ke4 Rb1 56. Ra6 Rb4+ 57. Kf5 Rb5+ 58. Kg4 Rb4 59. g6 Rb1 60. Kg5 Rg1+ 61. Kf5 Kh6 62. Re6 Rg2 63. Kf6 1-0

[Event "Lone Pine op Louis D. Statham Masters"]
[Site "Lone Pine"]
[Date "1979.04.01"]
[Round "6"]
[White "Diesen, Mark C"]
[Black "Gligoric, Svetozar"]
[Result "0-1"]
[ECO "E20"]
[WhiteElo "2460"]
[BlackElo "2560"]
[PlyCount "120"]
[EventDate "1979.03.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. c4 e6 2. Nf3 c5 3. Nc3 Nf6 4. d4 cxd4 5. Nxd4 Bb4 6. g3 0-0 7. Bg2 d5 8. cxd5 Nxd5 9. Bd2 Nxc3 10. bxc3 Be7 11. Rb1 a6 12. 0-0 e5 13. Nc2 Nc6 14. Ne3 Bc5 15. Qc2 f5 16. Qa4 Kh8 17. Qc4 Qd6 18. Qd5 Qe7 19. Qb3 e4 20. Nd5 Qd8 21. Be3 Na5 22. Qd1 Bxe3 23. Nxe3 Be6 24. Qd4 b5 25. Qe5 Qf6 26. Qxf6 Rxf6 27. Rfd1 Nc4 28. Nc2 Nb6 29. f3 Bxa2 30. Rb2 Bg8 31. fxe4 fxe4 32. Rb4 Nd5 33. Rxe4 Nxc3 34. Re7 Raf8 35. Rdd7 Be6 36. Rd6 Nxe2+ 37. Kh1 Bc4 38. Rxf6 gxf6 39. Ra7 Rd8 40. Ne3 Rd3 41. Nxc4 Rd1+ 42. Bf1 bxc4 43. Kg2 c3 44. Bxe2 c2 45. Rc7 c1Q 46. Rxc1 Rxc1 47. Bxa6 Rc2+ 48. Kg1 Kg7 49. Bd3 Rd2 50. Bf5 h6 51. h4 Kf7 52. Kf1 Ke7 53. Bg4 Kd6 54. Bf5 Ke5 55. Bg6 Kd4 56. Be8 Ke3 57. Bh5 f5 58. Kg1 f4 59. gxf4 Kxf4 60. Bg6 Kg3 0-1

[Event "Lone Pine op Louis D. Statham Masters"]
[Site "Lone Pine"]
[Date "1979.03.29"]
[Round "5"]
[White "Miles, Anthony John"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "A28"]
[WhiteElo "2560"]
[BlackElo "2460"]
[PlyCount "61"]
[EventDate "1979.03.25"]
[EventType "swiss"]
[EventRounds "9"]
[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. Nf3 Nc6 4. e3 Bb4 5. Nd5 a5 6. a3 Be7 7. d4 d6 8. Be2 0-0 9. b3 Re8 10. Bb2 Bf8 11. Qc2 exd4 12. Nxd4 Nxd5 13. cxd5 Nxd4 14. Bxd4 Qg5 15. Bf3 Bg4 16. Bxg4 Qxg4 17. 0-0 Qd7 18. Rfc1 Rec8 19. a4 c5 20. Bc3 b5 21. Qd2 Rcb8 22. Ra2 Rb7 23. e4 Re8 24. Re1 f5 25. e5 dxe5 26. Bxe5 c4 27. bxc4 Bb4 28. Bc3 Rxe1+ 29. Qxe1 bxc4 30. Rb2 h6 31. Qe6+ 1/2-1/2

[Event "Lone Pine op Louis D. Statham Masters"]
[Site "Lone Pine"]
[Date "1979.03.28"]
[Round "4"]
[White "Chandler, Murray G"]
[Black "Diesen, Mark C"]
[Result "0-1"]
[ECO "C63"]
[WhiteElo "2380"]
[BlackElo "2460"]
[PlyCount "112"]
[EventDate "1979.03.25"]
[EventType "swiss"]
[EventRounds "9"]
[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 f5 4. Nc3 Nd4 5. Bc4 c6 6. d3 Nf6 7. Nxe5 Qe7 8. Nf3 Nxf3+ 9. Qxf3 b5 10. Bb3 b4 11. Na4 fxe4 12. dxe4 Qxe4+ 13. Qxe4+ Nxe4 14. 0-0 d5 15. Re1 Be7 16. f3 Nf6 17. a3 bxa3 18. Rxa3 Kf7 19. Ra1 Be6 20. Re2 c5 21. Bg5 c4 22. Bxc4 dxc4 23. Rae1 Bb4 24. c3 Bd7 25. cxb4 Bxa4 26. Re7+ Kg6 27. Bxf6 gxf6 28. R1e4 h5 29. Rxc4 Rh7 30. Re3 Re8 31. Ra3 Bb5 32. Rc5 a6 33. h4 Re1+ 34. Kh2 Re2 35. f4 Kh6 36. Rc8 Bd7 37. Rg8 Be6 38. Rf8 Kg7 39. Rd8 Rh8 40. Rd6 Bc8 41. f5 Kf7 42. Rg3 Re5 43. Rc3 Bxf5 44. Rxa6 Rb8 45. Ra7+ Re7 46. Ra5 Bg4 47. b5 Re5 48. Rb3 Rb7 49. Kg3 Bd7 50. Rd3 Bxb5 51. Rd2 Re4 52. Rd5 Be2 53. Rd2 Bg4 54. Ra6 Be6 55. Kf3 Rxh4 56. Rdd6 Rb3+ 0-1

[Event "Lone Pine op Louis D. Statham Masters"]
[Site "Lone Pine"]
[Date "1979.03.27"]
[Round "3"]
[White "Diesen, Mark C"]
[Black "Whitehead, Jay E"]
[Result "1-0"]
[ECO "E50"]
[WhiteElo "2460"]
[BlackElo "2235"]
[PlyCount "91"]
[EventDate "1979.03.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 0-0 6. Nf3 b6 7. 0-0 d6 8. Ne2 d5 9. a3 Ba5 10. Rb1 b5 11. cxb5 c4 12. Bc2 a6 13. bxa6 Bxa6 14. Ne5 Ne4 15. f3 Nd6 16. Nc3 f6 17. Ng4 Nc6 18. Kh1 f5 19. Ne5 Nxe5 20. dxe5 Nf7 21. f4 g5 22. Ne2 Bb6 23. Nd4 Qe7 24. Rg1 g4 25. Bd2 Bc5 26. Bb4 Bxb4 27. axb4 Bc8 28. Qd2 Bd7 29. Ra1 Rfb8 30. Ra3 Nd8 31. Rxa8 Rxa8 32. Nxf5 Qf8 33. Nd6 Rb8 34. Ra1 Nc6 35. b5 Ne7 36. Qa5 d4 37. Qa7 Bxb5 38. Nxb5 Rxb5 39. Qxd4 Qc8 40. e4 Rb7 41. f5 Rd7 42. Qe3 Nc6 43. Qc5 Qb7 44. Qxc4 Nxe5 45. Qxe6+ Nf7 46. f6 1-0

[Event "Lone Pine op Louis D. Statham Masters"]
[Site "Lone Pine"]
[Date "1979.03.26"]
[Round "2"]
[White "De Firmian, Nick E"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "A49"]
[BlackElo "2460"]
[PlyCount "28"]
[EventDate "1979.03.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. Nf3 g6 2. e4 d6 3. d4 Bg7 4. Nc3 Nf6 5. g3 0-0 6. Bg2 Nbd7 7. 0-0 e5 8. b3 Re8 9. Bb2 c6 10. Re1 b5 11. d5 cxd5 12. Nxd5 Bb7 13. Nxf6+ Nxf6 14. Qd3 Qb6 1/2-1/2

[Event "Lone Pine op Louis D. Statham Masters"]
[Site "Lone Pine"]
[Date "1979.03.25"]
[Round "1"]
[White "Diesen, Mark C"]
[Black "Rigo, Janos"]
[Result "1/2-1/2"]
[ECO "E20"]
[WhiteElo "2460"]
[BlackElo "2385"]
[PlyCount "55"]
[EventDate "1979.03.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3 0-0 5. Bg2 d5 6. Nf3 c5 7. cxd5 cxd4 8. Nxd4 Nxd5 9. Bd2 Nxc3 10. bxc3 Bc5 11. Rb1 e5 12. Nc2 Nc6 13. 0-0 Qa5 14. Nb4 Bxb4 15. cxb4 Qxa2 16. b5 Nd4 17. e3 Rd8 18. exd4 Rxd4 19. Qh5 Rxd2 20. Qxe5 Qe6 21. Qc7 Qd6 22. Rfe1 Kf8 23. Rbc1 Qxc7 24. Rxc7 Rb8 25. Rec1 Bd7 26. Bxb7 Bxb5 27. Ra1 a5 28. Rxa5 1/2-1/2

[Event "Marshall op"]
[Site "New York"]
[Date "1979.??.??"]
[Round "5"]
[White "Diesen, Mark C"]
[Black "Adam, William"]
[Result "1/2-1/2"]
[ECO "E12"]
[WhiteElo "2460"]
[PlyCount "62"]
[EventDate "1979.03.??"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 b6 5. Bg5 Bb7 6. e3 0-0 7. Bd3 d5 8. cxd5 exd5 9. 0-0 Bxc3 10. bxc3 Qd6 11. Bf4 Qe7 12. Qc2 Ne4 13. c4 dxc4 14. Bxc4 Nd7 15. Bd3 c5 16. Ne5 Nxe5 17. Bxe5 Nf6 18. Bxf6 Qxf6 19. Bxh7+ Kh8 20. Be4 Bxe4 21. Qxe4 Rfe8 22. Qg4 cxd4 23. exd4 Rad8 24. Rad1 Rd5 25. Rd3 Kg8 26. Rc1 Qc6 27. Qd1 Qd7 28. h3 Rd8 29. Rc4 b5 30. Rb4 a5 31. Rbb3 b4 1/2-1/2

[Event "Marshall op"]
[Site "New York"]
[Date "1979.??.??"]
[Round "2"]
[White "Diesen, Mark C"]
[Black "Evans, Larry D"]
[Result "1/2-1/2"]
[ECO "E05"]
[WhiteElo "2460"]
[PlyCount "61"]
[EventDate "1979.03.??"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. 0-0 0-0 6. d4 dxc4 7. Qc2 a6 8. a4 Nc6 9. Qxc4 Qd5 10. Qxd5 exd5 11. Bf4 Bf5 12. Bxc7 Rac8 13. Be5 Ne4 14. Nc3 Nxc3 15. bxc3 g5 16. Nd2 Nxe5 17. dxe5 Rxc3 18. Bxd5 Rd8 19. e4 Be6 20. Rab1 Bxd5 21. exd5 Rxd5 22. Rxb7 Rxe5 23. Kg2 Re6 24. Nb3 Rc4 25. a5 Rb4 26. Rxb4 Bxb4 27. Rc1 Re5 28. Rc6 Bxa5 29. Rxa6 Bc3 30. Rc6 Bb2 31. Nc5 1/2-1/2

[Event "Marshall op"]
[Site "New York"]
[Date "1979.??.??"]
[Round "4"]
[White "Diesen, Mark C"]
[Black "Wilder, Michael"]
[Result "1-0"]
[ECO "E91"]
[WhiteElo "2460"]
[BlackElo "2255"]
[PlyCount "81"]
[EventDate "1979.03.??"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 Bg4 7. Be3 e5 8. d5 Nh5 9. h3 Bd7 10. c5 Qe7 11. Qb3 Bc8 12. cxd6 cxd6 13. Nd2 Nf4 14. Bf1 f5 15. Nc4 Na6 16. 0-0-0 fxe4 17. Nxe4 Rd8 18. g3 Nh5 19. Qa3 b5 20. Na5 Bf5 21. Nc6 Qc7 22. Ng5 Nb8 23. Bxb5 Nxc6 24. Bxc6 h6 25. g4 Bd7 26. gxh5 hxg5 27. Bxg5 Rdc8 28. hxg6 Bxc6 29. dxc6 Qxc6+ 30. Kb1 d5 31. Qd3 Kh8 32. Bc1 Rab8 33. Qf5 e4 34. Qh5+ Kg8 35. Qxd5+ Qxd5 36. Rxd5 Rf8 37. Rh2 Rb6 38. Rg2 Rc8 39. h4 Rbc6 40. Rd1 Rc2 41. Rd8+ 1-0

[Event "Marshall op"]
[Site "New York"]
[Date "1979.??.??"]
[Round "1"]
[White "Gruchacz, Robert"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "B82"]
[WhiteElo "2355"]
[BlackElo "2460"]
[PlyCount "62"]
[EventDate "1979.03.??"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. Nge2 Nc6 4. d4 cxd4 5. Nxd4 d6 6. Be3 Nf6 7. f4 e5 8. fxe5 Ng4 9. Bg1 Ngxe5 10. Qd2 Be7 11. 0-0-0 Nxd4 12. Bxd4 0-0 13. Nd5 Bg5 14. Be3 Bxe3 15. Nxe3 Qh4 16. Qxd6 Qxe4 17. Qd4 Qxd4 18. Rxd4 Be6 19. Re4 f6 20. Bc4 Kf7 21. Bd5 Bxd5 22. Nxd5 Rfd8 23. Rd1 Rac8 24. Nc3 Rxd1+ 25. Kxd1 Ke6 26. Ra4 Rd8+ 27. Ke2 Nc6 28. Re4+ Kf5 29. Ke3 Ne5 30. Rf4+ Ke6 31. Rb4 Rd7 1/2-1/2

[Event "Virovitica"]
[Site "Virovitica"]
[Date "1979.??.??"]
[Round "?"]
[White "Kovacevic, Vlatko"]
[Black "Diesen, Mark C"]
[Result "1-0"]
[ECO "A46"]
[WhiteElo "2500"]
[BlackElo "2460"]
[PlyCount "79"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "CRO"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 Qb6 5. Qc1 Nc6 6. c3 Nh5 7. Bg5 h6 8. Bh4 f5 9. g4 g5 10. gxh5 gxh4 11. Nxh4 Bg7 12. Ng6 Rg8 13. Nd2 d5 14. f4 Bd7 15. Nb3 cxd4 16. exd4 0-0-0 17. Qd2 Be8 18. 0-0-0 Bxg6 19. hxg6 Bf8 20. Rg1 Ne7 21. Be2 Qd6 22. Bh5 Bg7 23. Nc5 Rge8 24. Nd3 Ng8 25. Ne5 Qa6 26. Kb1 Nf6 27. Be2 Qa5 28. Nf7 Rd7 29. Qc2 Kb8 30. Qb3 Rc8 31. Bd3 Qc7 32. Bb5 Qxf4 33. Bxd7 Nxd7 34. Rge1 Nf8 35. Qb4 Qc7 36. Nd6 Rd8 37. Nxf5 a5 38. Qa3 exf5 39. Re7 Rd7 40. Rxg7 1-0

[Event "Marshall op"]
[Site "New York"]
[Date "1979.??.??"]
[Round "3"]
[White "Popovych, Orest"]
[Black "Diesen, Mark C"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "2365"]
[BlackElo "2460"]
[PlyCount "65"]
[EventDate "1979.03.??"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. f4 a6 7. Qf3 Qb6 8. Nb3 Nc6 9. Be3 Qc7 10. g4 b5 11. g5 Nd7 12. Bd3 Be7 13. 0-0-0 Bb7 14. Kb1 Na5 15. Nxa5 Qxa5 16. Rhg1 Rc8 17. Qf2 b4 18. Ne2 Nc5 19. Ng3 g6 20. Bd4 e5 21. fxe5 dxe5 22. Be3 0-0 23. h4 Na4 24. Rh1 Bc5 25. h5 Qb6 26. Bxc5 Qxc5 27. Qh2 Rc7 28. Ne2 Rb8 29. Ka1 Bc8 30. hxg6 fxg6 31. Bc4+ Kf8 32. Rd8+ Ke7 33. Rd5 1-0

[Event "Ivan Parcetic Memorial-08"]
[Site "Sombor"]
[Date "1978.11.??"]
[Round "?"]
[White "Matulovic, Milan"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "B96"]
[WhiteElo "2525"]
[BlackElo "2220"]
[PlyCount "104"]
[EventDate "1978.11.14"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qc7 8. Bxf6 gxf6 9. Qd2 b5 10. a4 b4 11. Na2 Qb6 12. Bc4 Nc6 13. Nxc6 Qxc6 14. Qe2 Qxa4 15. 0-0 Qa5 16. Kh1 Bb7 17. c3 bxc3 18. Nxc3 Qc5 19. f5 Bc8 20. Bxa6 Bxa6 21. Rxa6 Rxa6 22. Qxa6 Be7 23. fxe6 fxe6 24. Qa8+ Bd8 25. Rxf6 Qc4 26. Rf3 Ke7 27. Qa7+ Bc7 28. Qf2 Kd7 29. Rf7+ Kc6 30. Qa7 Rc8 31. h3 d5 32. exd5+ exd5 33. Rf6+ Kd7 34. Qf2 Re8 35. g4 d4 36. Qf5+ Kd8 37. Rf7 Qc6+ 38. Qd5+ Qxd5+ 39. Nxd5 Re1+ 40. Kg2 d3 41. Rf2 Rc1 42. Ne3 Re1 43. Nf1 Re2 44. Kf3 Re1 45. Ng3 Bxg3 46. Kxg3 Re3+ 47. Kf4 Rxh3 48. Rd2 Kc7 49. Ke4 Rg3 50. Kf4 Rh3 51. Ke4 Rg3 52. Kf4 Rh3 1/2-1/2

[Event "Rubinstein Memorial-16"]
[Site "Polanica Zdroj"]
[Date "1978.08.23"]
[Round "15"]
[White "Kuligowski, Adam"]
[Black "Diesen, Mark C"]
[Result "0-1"]
[ECO "E87"]
[WhiteElo "2325"]
[BlackElo "2220"]
[PlyCount "53"]
[EventDate "1978.08.06"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "POL"]
[EventCategory "9"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 e5 7. d5 Nh5 8. Qd2 f5 9. 0-0-0 Nd7 10. Bd3 a6 11. Kb1 Ndf6 12. exf5 gxf5 13. Nh3 Qe7 14. Ng5 e4 15. Bc2 b5 16. cxb5 axb5 17. Nxb5 Rb8 18. Nd4 Qe5 19. f4 Qxd5 20. Bb3 Rxb3 21. Nxb3 Qb7 22. Rc1 h6 23. Nh3 Nd5 24. Bd4 Bxd4 25. Qxd4 Nhf6 26. Na5 Qb5 27. Nc6 0-1

[Event "Rubinstein Memorial-16"]
[Site "Polanica Zdroj"]
[Date "1978.08.21"]
[Round "14"]
[White "Diesen, Mark C"]
[Black "Dorfman, Josif D"]
[Result "1/2-1/2"]
[ECO "D90"]
[WhiteElo "2220"]
[BlackElo "2550"]
[PlyCount "52"]
[EventDate "1978.08.06"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "POL"]
[EventCategory "9"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qa4+ c6 6. cxd5 Nxd5 7. e4 Nb6 8. Qd1 Bg4 9. Be3 0-0 10. Be2 Bxf3 11. gxf3 N8d7 12. a4 e5 13. a5 exd4 14. Bxd4 Nc8 15. Bxg7 Kxg7 16. Qd4+ Nf6 17. Qxd8 Rxd8 18. Rd1 Ne7 19. f4 Rxd1+ 20. Kxd1 Rd8+ 21. Kc2 h6 22. Bf3 Rd4 23. Ra1 Kf8 24. h4 h5 25. Rd1 Rxd1 26. Nxd1 Ke8 1/2-1/2

[Event "Rubinstein Memorial-16"]
[Site "Polanica Zdroj"]
[Date "1978.08.20"]
[Round "13"]
[White "Bielczyk, Jacek"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "B85"]
[WhiteElo "2380"]
[BlackElo "2220"]
[PlyCount "82"]
[EventDate "1978.08.06"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "POL"]
[EventCategory "9"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e6 7. Be2 Be7 8. 0-0 0-0 9. Kh1 Nc6 10. Be3 Bd7 11. Qe1 b5 12. a3 Qb8 13. Bf3 Nxd4 14. Bxd4 e5 15. Nd5 Nxd5 16. exd5 exd4 17. Qxe7 Bf5 18. Qe2 Rc8 19. Rac1 Rxc2 20. Rxc2 d3 21. Qd2 dxc2 22. g4 Bd7 23. Rc1 Qd8 24. Rxc2 Qh4 25. Qf2 Qxf2 26. Rxf2 Rc8 27. Kg2 f6 28. Re2 Kf7 29. h3 g5 30. Be4 h6 31. f5 Rc4 32. Kf3 b4 33. Bd3 Rf4+ 34. Ke3 bxa3 35. bxa3 Ra4 36. Ra2 Bb5 37. Bc2 Rf4 38. Rb2 h5 39. Rb4 hxg4 40. hxg4 Rxb4 41. axb4 Ke7 1/2-1/2

[Event "Rubinstein Memorial-16"]
[Site "Polanica Zdroj"]
[Date "1978.08.19"]
[Round "12"]
[White "Diesen, Mark C"]
[Black "Boensch, Uwe"]
[Result "1/2-1/2"]
[ECO "B84"]
[WhiteElo "2220"]
[BlackElo "2490"]
[PlyCount "37"]
[EventDate "1978.08.06"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "POL"]
[EventCategory "9"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. 0-0 Nbd7 8. a4 Be7 9. f4 0-0 10. Bf3 Qc7 11. g4 Rd8 12. g5 Ne8 13. Bg2 g6 14. Bh3 Nf8 15. Kh1 d5 16. e5 Ng7 17. Bg2 b6 18. Be3 Bb7 19. Nce2 1/2-1/2

[Event "Rubinstein Memorial-16"]
[Site "Polanica Zdroj"]
[Date "1978.08.18"]
[Round "11"]
[White "Schmidt, Wlodzimierz"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "A32"]
[WhiteElo "2505"]
[BlackElo "2220"]
[PlyCount "69"]
[EventDate "1978.08.06"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "POL"]
[EventCategory "9"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. d4 cxd4 5. Nxd4 a6 6. g3 Qc7 7. Qa4 b6 8. Bg2 Bb7 9. Bf4 Qc8 10. e4 Nc6 11. Nxc6 Qxc6 12. Qxc6 Bxc6 13. 0-0 Rc8 14. Rac1 Nh5 15. Be3 Bc5 16. Bxc5 bxc5 17. e5 Ke7 18. Rcd1 Bxg2 19. Kxg2 Rc6 20. f4 f5 21. Rd2 d6 22. Rfd1 Rd8 23. Kf3 g6 24. Ke3 h6 25. Kf3 Ng7 26. h3 Ne8 27. g4 Rcc8 28. gxf5 gxf5 29. Na4 Rc6 30. b3 Rcc8 31. Kg3 Rc6 32. Kh4 Kf7 33. exd6 Nf6 34. Nc3 Rd7 35. Kg3 1/2-1/2

[Event "Rubinstein Memorial-16"]
[Site "Polanica Zdroj"]
[Date "1978.08.16"]
[Round "10"]
[White "Diesen, Mark C"]
[Black "Farago, Ivan"]
[Result "1/2-1/2"]
[ECO "E06"]
[WhiteElo "2220"]
[BlackElo "2510"]
[PlyCount "17"]
[EventDate "1978.08.06"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "POL"]
[EventCategory "9"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 e6 2. g3 Nf6 3. c4 Bb4+ 4. Nd2 c5 5. dxc5 Bxc5 6. Ngf3 Nc6 7. Bg2 d5 8. 0-0 0-0 9. a3 1/2-1/2

[Event "Rubinstein Memorial-16"]
[Site "Polanica Zdroj"]
[Date "1978.08.15"]
[Round "9"]
[White "Ghinda, Mihail Viorel"]
[Black "Diesen, Mark C"]
[Result "1/2-1/2"]
[ECO "B11"]
[WhiteElo "2445"]
[BlackElo "2220"]
[PlyCount "24"]
[EventDate "1978.08.06"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "POL"]
[EventCategory "9"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 4. h3 Bh5 5. exd5 cxd5 6. d4 Nc6 7. g4 Bg6 8. Ne5 e6 9. h4 Nxe5 10. dxe5 Bb4 11. h5 Be4 12. Rh3 d4 1/2-1/2

[Event "Rubinstein Memorial-16"]
[Site "Polanica Zdroj"]
[Date "1978.08.14"]
[Round "8"]
[White "Diesen, Mark C"]
[Black "Swic, Waldemar"]
[Result "1/2-1/2"]
[ECO "D97"]
[WhiteElo "2220"]
[PlyCount "55"]
[EventDate "1978.08.06"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "POL"]
[EventCategory "9"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 0-0 7. e4 a6 8. Be2 b5 9. Qb3 Bb7 10. e5 Ne4 11. 0-0 Nxc3 12. Qxc3 Bd5 13. a4 c6 14. Ne1 Nd7 15. Nd3 a5 16. axb5 cxb5 17. Nf4 b4 18. Qd3 Bc6 19. Be3 Nb6 20. Rfc1 Bb7 21. Qb3 e6 22. Rc5 Re8 23. Bb5 Re7 24. Bc6 Bxc6 25. Rxc6 Rb7 26. Rd6 Qe8 27. Nd3 Nc8 28. Nc5 1/2-1/2

