[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.05.24"]
[Round "8"]
[White "Kat, Rudolf"]
[Black "Van Wissen, Michiel"]
[Result "1/2-1/2"]
[ECO "A35"]
[WhiteElo "1954"]
[BlackElo "2242"]
[PlyCount "77"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 c5 4. e3 Bg7 5. Be2 0-0 6. 0-0 cxd4 7. exd4 d5 8. Nc3 Nc6 9. cxd5 Nxd5 10. Nxd5 Qxd5 11. Be3 Bf5 12. Qa4 Rad8 13. Rfd1 Qa5 14. Qxa5 Nxa5 15. Rac1 Nc6 16. d5 Nb4 17. Bxa7 Bxb2 18. Rc7 Bf6 19. Rxb7 Nxa2 20. Bc4 Nc3 21. Re1 Nxd5 22. Bd4 Bc8 23. Rb8 Be6 24. Rxd8 Rxd8 25. Bxf6 exf6 26. Nd4 Nc7 27. Nxe6 fxe6 28. g3 Kf7 29. Kg2 Rd6 30. Ra1 Rc6 31. Bb3 Ke7 32. Ra7 Kd6 33. Rb7 h6 34. Rb8 Rc3 35. Ba4 Rc4 36. Rd8+ Ke7 37. Rd7+ Kf8 38. Rd8+ Ke7 39. Rd7+ 1/2-1/2

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.04.26"]
[Round "7"]
[White "Hettfleisch, Maurice"]
[Black "Kat, Rudolf"]
[Result "1/2-1/2"]
[ECO "B11"]
[WhiteElo "1751"]
[BlackElo "1954"]
[PlyCount "94"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c6 2. Nf3 d5 3. Nc3 Bg4 4. h3 Bh5 5. exd5 cxd5 6. Bb5+ Nc6 7. g4 Bg6 8. Ne5 Rc8 9. Qf3 e6 10. d4 Bd6 11. Nxg6 hxg6 12. Bf4 Qf6 13. Nxd5 exd5 14. Qe3+ Nge7 15. Bxd6 Qxd6 16. 0-0-0 Kf8 17. c3 a6 18. Bd3 b5 19. Rde1 Na5 20. Re2 Nc4 21. Bxc4 dxc4 22. Rhe1 Rc7 23. Qf3 Kg8 24. g5 Rh4 25. Qa8+ Kh7 26. Qf8 Nf5 27. Qb8 Qf4+ 28. Kb1 Ne7 29. Qf8 Qxg5 30. Rxe7 Rxe7 31. Qxe7 Qf5+ 32. Kc1 Rxh3 33. d5 Qxf2 34. d6 Rh2 35. Re2 Qf1+ 36. Kd2 Qf4+ 37. Kd1 Rh1+ 38. Re1 Qf3+ 39. Qe2 Qd5+ 40. Qd2 Rxe1+ 41. Kxe1 Qh1+ 42. Ke2 Qh5+ 43. Ke1 Qh1+ 44. Kf2 Qh2+ 45. Ke3 Qh6+ 46. Ke2 Qh5+ 47. Ke1 Qh1+ 1/2-1/2

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.03.22"]
[Round "6"]
[White "Kat, Rudolf"]
[Black "Schenkelaars, Robin"]
[Result "1/2-1/2"]
[ECO "D00"]
[WhiteElo "1954"]
[BlackElo "1559"]
[PlyCount "78"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. e3 e6 3. Bd3 Nf6 4. Nd2 Nbd7 5. f4 c6 6. Qf3 Be7 7. Nh3 Qc7 8. Nf2 b6 9. g4 Nf8 10. h4 Bb7 11. g5 N6d7 12. h5 0-0-0 13. h6 g6 14. Ng4 f5 15. gxf6 Bxf6 16. Qf2 c5 17. c3 Be7 18. Nf3 Re8 19. Bd2 Nb8 20. 0-0-0 Nfd7 21. Kb1 Nc6 22. Qe2 c4 23. Bc2 b5 24. Be1 a5 25. Bh4 Bxh4 26. Rxh4 b4 27. Ba4 Qb6 28. Ka1 Ba6 29. Bxc6 Qxc6 30. Nfe5 Nxe5 31. Nxe5 Qc7 32. Qe1 Qb7 33. Rc1 b3 34. a3 Bb5 35. Qg3 Rhg8 36. Rg4 Qe7 37. Rg5 Ref8 38. Rg1 Qe8 39. Qg2 Ba6 1/2-1/2

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.02.15"]
[Round "5"]
[White "Straver, Robert"]
[Black "Kat, Rudolf"]
[Result "1/2-1/2"]
[ECO "D20"]
[WhiteElo "2131"]
[BlackElo "1954"]
[PlyCount "62"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e4 Nc6 4. Be3 e5 5. d5 Na5 6. Qa4+ c6 7. dxc6 Nxc6 8. Bxc4 Bb4+ 9. Nc3 Nge7 10. Nge2 0-0 11. a3 Bxc3+ 12. Nxc3 Nd4 13. 0-0 Bd7 14. Qd1 Be6 15. Bxe6 Nxe6 16. Qb3 Nc6 17. Qxb7 Ncd4 18. Bxd4 exd4 19. Nd5 Rb8 20. Qxa7 Rxb2 21. Rad1 Qh4 22. Ne7+ Kh8 23. Nf5 Qxe4 24. Nxd4 Nf4 25. Nf3 Nxg2 26. Qxf7 Rbb8 27. Qd5 Qxf3 28. Qxf3 Rxf3 29. Kxg2 Rxa3 30. Rd7 Rf8 31. Rc1 Raf3 1/2-1/2

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.01.11"]
[Round "4"]
[White "Eveleens, Ed"]
[Black "Kat, Rudolf"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1675"]
[BlackElo "1954"]
[PlyCount "86"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Bd3 Bxd3 5. Qxd3 e6 6. Nf3 c5 7. c3 c4 8. Qe2 Nc6 9. 0-0 Nge7 10. Ng5 h6 11. Nf3 Nf5 12. b3 b5 13. bxc4 bxc4 14. Ba3 Bxa3 15. Nxa3 Qa5 16. Qb2 Rb8 17. Qc1 0-0 18. g4 Nfe7 19. g5 h5 20. Nh4 g6 21. f4 Kg7 22. Rf3 Rb6 23. Nc2 Nf5 24. Nxf5+ exf5 25. a3 Rb3 26. Nb4 Ne7 27. Qe3 Rxa3 28. Rxa3 Qxa3 29. e6 f6 30. gxf6+ Rxf6 31. Qe5 Qa4 32. Nxd5 Qd1+ 33. Rf1 Qg4+ 34. Kh1 Nxd5 35. Qxd5 Qe2 36. Ra1 Rxe6 37. Rxa7+ Kh6 38. Ra1 Re4 39. Qd8 Qf3+ 40. Kg1 Rxf4 41. Qh8+ Kg5 42. Qd8+ Kg4 43. Qe8 Kh3 0-1

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2018.10.19"]
[Round "1"]
[White "Kat, Rudolf"]
[Black "Van der Velden, Bram"]
[Result "1/2-1/2"]
[ECO "D05"]
[WhiteElo "1954"]
[BlackElo "2172"]
[PlyCount "78"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. e3 c5 4. c3 Nc6 5. Bd3 Bg4 6. Nbd2 e6 7. Nf1 Bd6 8. Ng3 0-0 9. h3 Bxf3 10. gxf3 Qc7 11. f4 cxd4 12. cxd4 Nb4 13. Bb1 Rac8 14. Bd2 Qb6 15. a3 Nc6 16. Bc3 Nd7 17. Bxh7+ Kxh7 18. Qh5+ Kg8 19. Rg1 Ne7 20. Qg5 f6 21. Qg4 f5 22. Qh4 Nf6 23. Nh5 Nxh5 24. Qxh5 Rf6 25. Ke2 Qb5+ 26. Kf3 Qd3 27. Rg5 Qe4+ 28. Kg3 Qc2 29. Rg1 Rcf8 30. Kh2 R8f7 31. Qh4 g6 32. Rh5 Kf8 33. Rh8+ Ng8 34. Rxg6 Rxg6 35. Qd8+ Kg7 36. Rxg8+ Kh7 37. Rh8+ Kg7 38. Rg8+ Kh7 39. Rh8+ Kg7 1/2-1/2

[Event "Leiden LCT op-A 11th"]
[Site "Leiden"]
[Date "2017.07.17"]
[Round "4"]
[White "Kat, Rudolf"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "B25"]
[WhiteElo "1924"]
[BlackElo "2071"]
[PlyCount "51"]
[EventDate "2017.07.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. Be3 d6 7. Qd2 Nge7 8. Bh6 0-0 9. Bxg7 Kxg7 10. Nh3 Rb8 11. 0-0 b5 12. f4 Nd4 13. Nd1 b4 14. Ne3 Bb7 15. c3 Ndc6 16. f5 exf5 17. exf5 gxf5 18. Nxf5+ Nxf5 19. Rxf5 f6 20. Rh5 Qd7 21. Qh6+ Kh8 22. Be4 f5 23. Rf1 Qg7 24. Qxg7+ Kxg7 25. Rg5+ Kh6 26. Rf4 1-0

[Event "Leiden LCT op-A 11th"]
[Site "Leiden"]
[Date "2017.07.14"]
[Round "1"]
[White "Van Dael, Siem"]
[Black "Kat, Rudolf"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "2132"]
[BlackElo "1924"]
[PlyCount "83"]
[EventDate "2017.07.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 d6 4. d4 Be7 5. dxe5 dxe5 6. Qxd8+ Bxd8 7. Bb5 Bd7 8. Nc3 Nge7 9. Be3 f6 10. 0-0-0 Be6 11. Rd2 Kf7 12. Rhd1 a6 13. Ba4 Na5 14. Bb3 Nxb3+ 15. axb3 b6 16. Ne1 g5 17. g3 c6 18. f3 Bc7 19. Nd3 Rhd8 20. Rf2 Ng6 21. Rdf1 Bxb3 22. Nb4 Bc4 23. Nxc6 Rd6 24. Nb4 Bxf1 25. Rxf1 Bd8 26. Nbd5 Ne7 27. f4 Nxd5 28. exd5 Kg6 29. f5+ Kh5 30. h3 Rc8 31. g4+ Kh6 32. Rd1 Rc4 33. Rd3 Kg7 34. b3 Rxc3 35. Rxc3 Rxd5 36. Rc6 Rb5 37. Kb2 e4 38. Rd6 Be7 39. Rd7 Kf7 40. c4 Re5 41. Bd4 e3 42. Bxe5 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2012.06.26"]
[Round "7"]
[White "Huizer, Olivier"]
[Black "Kat, Rudolf"]
[Result "1/2-1/2"]
[ECO "C01"]
[WhiteElo "1796"]
[BlackElo "1920"]
[PlyCount "21"]
[EventDate "2012.05.15"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bg4 5. Bd3 Bd6 6. 0-0 Ne7 7. Re1 0-0 8. Bxh7+ Kh8 9. Bd3 Nbc6 10. c3 Ng6 11. h3 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2012.06.19"]
[Round "6"]
[White "Kat, Rudolf"]
[Black "Oei, Hway Ik"]
[Result "0-1"]
[ECO "B14"]
[WhiteElo "1920"]
[BlackElo "2076"]
[PlyCount "60"]
[EventDate "2012.05.15"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[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 c5 4. e3 cxd4 5. exd4 d5 6. Nf3 Be7 7. c5 0-0 8. Bd3 b6 9. b4 a5 10. Na4 Nfd7 11. Qc2 Nc6 12. Bd2 Nxb4 13. Bxb4 axb4 14. Bxh7+ Kh8 15. Bd3 bxc5 16. Nxc5 Nxc5 17. dxc5 Bf6 18. 0-0 Bxa1 19. Rxa1 Ra3 20. Rb1 Qa5 21. Rb2 Rc3 22. Qd2 Qxc5 23. h4 f6 24. Qe2 Rxd3 25. Qxd3 Qc1+ 26. Kh2 Qxb2 27. Qg6 Qxf2 28. h5 Qe3 29. Nh4 Kg8 30. Qg4 Qg5 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2012.06.12"]
[Round "5"]
[White "Oosthout, Wouter"]
[Black "Kat, Rudolf"]
[Result "1/2-1/2"]
[ECO "B01"]
[WhiteElo "1857"]
[BlackElo "1920"]
[PlyCount "45"]
[EventDate "2012.05.15"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. Nf3 Nf6 5. Bc4 Bf5 6. d3 e6 7. Qe2 Be7 8. h3 h6 9. Bf4 a6 10. a3 Nc6 11. Ba2 Bd6 12. Bd2 Qe7 13. 0-0 0-0 14. Ne4 Nxe4 15. dxe4 Bh7 16. e5 Bc5 17. Bc3 Rfd8 18. Rad1 Rxd1 19. Rxd1 Rd8 20. b4 Bb6 21. Bb2 Rxd1+ 22. Qxd1 Qd8 23. Qxd8+ 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2012.06.06"]
[Round "4"]
[White "Kat, Rudolf"]
[Black "Brunner, Otto"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1920"]
[PlyCount "139"]
[EventDate "2012.05.15"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 d5 2. Bf4 e6 3. e3 Nf6 4. Nf3 h6 5. h3 c5 6. c3 Bd7 7. Ne5 Be7 8. Nd2 b6 9. Nxd7 Qxd7 10. Bd3 cxd4 11. exd4 0-0 12. 0-0 b5 13. a3 a6 14. Re1 Bd6 15. Be5 Qe7 16. Qf3 Bxe5 17. dxe5 Nfd7 18. Bc2 Nc6 19. Qd3 g6 20. Nf3 f5 21. exf6 Qxf6 22. Qxg6+ Qxg6 23. Bxg6 Rf6 24. Bh5 Kg7 25. Rad1 Nf8 26. Nd4 Nd8 27. Rd3 Rc8 28. Rg3+ Kh8 29. Re5 Rc7 30. Rf3 Nd7 31. Rxf6 Nxf6 32. Bf3 Re7 33. Re1 h5 34. Nf5 Rd7 35. Ng3 Rh7 36. Re5 h4 37. Ne2 Re7 38. Nf4 Kg7 39. Nxd5 Nxd5 40. Bxd5 Kf6 41. Rh5 exd5 42. Kf1 Nf7 43. Rxh4 Re4 44. Rxe4 dxe4 45. Ke2 Ke5 46. f3 Ng5 47. h4 exf3+ 48. gxf3 Nh3 49. Ke3 Nf4 50. b3 Ng2+ 51. Kd3 Nxh4 52. c4 bxc4+ 53. Kxc4 Nxf3 54. Kc5 Nd4 55. b4 Nb3+ 56. Kb6 a5 57. bxa5 Kd6 58. a6 Nc5 59. a7 Nd7+ 60. Kb5 Kc7 61. a8Q Nb8 62. Qa7+ Kc8 63. Qh7 Nd7 64. a4 Nb8 65. a5 Nd7 66. a6 Nf8 67. Qh8 Kb8 68. Qxf8+ Ka7 69. Qe7+ Ka8 70. Qb7# 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2012.05.29"]
[Round "3"]
[White "Hellenberg, Jan Amerik"]
[Black "Kat, Rudolf"]
[Result "1-0"]
[ECO "A25"]
[WhiteElo "1595"]
[BlackElo "1920"]
[PlyCount "101"]
[EventDate "2012.05.15"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nf6 3. Bg2 Bc5 4. e3 Nc6 5. Nc3 a6 6. Nge2 h6 7. 0-0 0-0 8. d4 exd4 9. exd4 Ba7 10. h3 Rb8 11. a4 Re8 12. Be3 Ne7 13. Qd2 d6 14. g4 Ng6 15. Ng3 Nh7 16. Rae1 Be6 17. b3 Nh4 18. f4 Nxg2 19. Kxg2 f6 20. d5 Bxe3 21. Rxe3 Bf7 22. Rfe1 Qd7 23. Nf5 Rxe3 24. Rxe3 Re8 25. Ne4 b5 26. axb5 axb5 27. Nc3 bxc4 28. bxc4 Kf8 29. Qe2 Rxe3 30. Qxe3 h5 31. Kg3 hxg4 32. hxg4 g5 33. Qa7 gxf4+ 34. Kxf4 Ng5 35. Qd4 Qc8 36. Ne4 Nxe4 37. Qxe4 Qe8 38. Qxe8+ Kxe8 39. Ng7+ Ke7 40. Kf5 Bg8 41. Kf4 Bh7 42. Ne6 Bd3 43. Nxc7 Bxc4 44. Ke4 Kf7 45. Ne6 Kg6 46. Nd4 Kg5 47. Nf5 Kxg4 48. Ne3+ Kg5 49. Nxc4 f5+ 50. Kf3 Kf6 51. Kf4 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2012.05.22"]
[Round "2"]
[White "Kat, Rudolf"]
[Black "De Weert, Chris WJ"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "1920"]
[PlyCount "71"]
[EventDate "2012.05.15"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 d5 2. Bf4 Nf6 3. e3 e6 4. Nd2 c5 5. c3 Nc6 6. Bd3 a6 7. h3 Bd6 8. Bxd6 Qxd6 9. Ngf3 b5 10. a3 Bd7 11. 0-0 0-0 12. b4 c4 13. Bc2 e5 14. dxe5 Nxe5 15. Nd4 Nc6 16. N2f3 Rfe8 17. Nxc6 Bxc6 18. Qd4 Qc7 19. Qh4 Ne4 20. Nd4 g6 21. Bxe4 dxe4 22. Qf6 Bb7 23. a4 bxa4 24. Rxa4 Qe5 25. Qb6 Rab8 26. Ra5 Qe7 27. Rc5 Rec8 28. Rxc8+ Rxc8 29. Ra1 Rf8 30. Ra5 Bc8 31. Rc5 Qh4 32. Rxc4 Qh5 33. Qf6 Qd1+ 34. Kh2 Qd3 35. Rc7 Qd2 36. Nc6 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2012.05.15"]
[Round "1"]
[White "Van Haastert, Edwin"]
[Black "Kat, Rudolf"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "2431"]
[BlackElo "1920"]
[PlyCount "93"]
[EventDate "2012.05.15"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7 6. Be2 Qb6 7. dxc5 Bxc5 8. 0-0 a5 9. c4 Nge7 10. Nc3 Nd4 11. Nxd4 Bxd4 12. cxd5 Nxd5 13. Nxd5 exd5 14. Bd3 0-0 15. Qf3 Bb5 16. Bxb5 Qxb5 17. a4 Qc6 18. Bf4 Bxb2 19. Rab1 Bc3 20. Rb5 d4 21. Qg3 Rac8 22. h4 Rfe8 23. h5 Re6 24. Bg5 b6 25. f4 Qe4 26. f5 Rec6 27. Rf4 Qe1+ 28. Qxe1 Bxe1 29. Rxd4 Bg3 30. Kf1 h6 31. Rd8+ Rxd8 32. Bxd8 Rc1+ 33. Ke2 Re1+ 34. Kf3 Bxe5 35. Bxb6 f6 36. Rxa5 Rf1+ 37. Ke4 Rf4+ 38. Kd5 Rxf5 39. Ke6 Rg5 40. Ra8+ Kh7 41. a5 Bg3 42. a6 Rb5 43. Bd4 Be5 44. a7 Bxd4 45. Rh8+ Kxh8 46. a8Q+ Kh7 47. Kf7 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.29"]
[Round "7"]
[White "Kat, Rudolf"]
[Black "Termeulen, Albert"]
[Result "1-0"]
[ECO "A25"]
[WhiteElo "1895"]
[BlackElo "2092"]
[PlyCount "69"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. c4 g6 2. g3 Bg7 3. Bg2 d6 4. Nc3 e5 5. d3 Nc6 6. Rb1 f5 7. e3 Nf6 8. Nge2 0-0 9. b4 g5 10. b5 Ne7 11. h4 h6 12. hxg5 hxg5 13. a4 Rb8 14. a5 Be6 15. Qa4 Kf7 16. Kd2 Ng4 17. f3 Nf6 18. Ba3 d5 19. Bxe7 Qxe7 20. cxd5 Nxd5 21. Nxd5 Bxd5 22. Nc3 Be6 23. f4 exf4 24. gxf4 Rbd8 25. fxg5 Qxg5 26. Bxb7 Bxc3+ 27. Kxc3 Qxe3 28. Rbd1 Bd5 29. Bxd5+ Rxd5 30. Rhe1 Rxd3+ 31. Kc2 Rc3+ 32. Kb2 Qc5 33. Rd7+ Kf6 34. Qh4+ Kg6 35. Re6+ 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.22"]
[Round "6"]
[White "Siero, Paul"]
[Black "Kat, Rudolf"]
[Result "0-1"]
[ECO "D41"]
[WhiteElo "1158"]
[BlackElo "1895"]
[PlyCount "86"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Be7 7. cxd5 Nxd5 8. Bd2 Nc6 9. a3 0-0 10. Bd3 Bf6 11. Be3 Nxe3 12. fxe3 g6 13. 0-0 Bg7 14. Bc4 Ne7 15. Kh1 Nd5 16. Nxd5 exd5 17. Ba2 Be6 18. b4 Rc8 19. Rc1 Qe7 20. Qd3 Bf5 21. Qd2 Be4 22. Rc5 b6 23. Rxc8 Rxc8 24. Bb1 Bxb1 25. Rxb1 Qe4 26. Rc1 Rxc1+ 27. Qxc1 Bh6 28. Qc7 Bxe3 29. Qb8+ Kg7 30. Qe5+ Qxe5 31. Nxe5 Bxd4 32. Nd3 Kf6 33. g3 Kf5 34. Kg2 Ke4 35. Nf4 Be3 36. Ne2 d4 37. g4 Bf4 38. h3 Ke3 39. Kf1 Be5 40. Ke1 d3 41. Ng1 Bh2 42. Nf3 Kxf3 43. Kd2 Ke4 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.15"]
[Round "5"]
[White "Kat, Rudolf"]
[Black "Zuijdendorp, Milko"]
[Result "1-0"]
[ECO "A25"]
[WhiteElo "1895"]
[BlackElo "1585"]
[PlyCount "41"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nc6 3. g3 Bc5 4. Bg2 Nf6 5. e3 0-0 6. Nge2 Re8 7. d3 d6 8. a3 a5 9. 0-0 Rb8 10. Rb1 Bf5 11. Nd5 Nxd5 12. cxd5 Ne7 13. b4 axb4 14. axb4 Bb6 15. Nc3 Qd7 16. Na4 Qb5 17. e4 Bd7 18. Nxb6 Qxb6 19. Be3 Qb5 20. Qb3 Qa4 21. Qc3 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.08"]
[Round "4"]
[White "Kat, Rudolf"]
[Black "Gusnuckow, Milo"]
[Result "1/2-1/2"]
[ECO "A24"]
[WhiteElo "1895"]
[PlyCount "93"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. c4 g6 2. g3 Bg7 3. Bg2 d6 4. Nc3 Nf6 5. e4 e5 6. Nge2 Be6 7. d3 c6 8. 0-0 0-0 9. b4 d5 10. c5 d4 11. Na4 b5 12. cxb6 axb6 13. a3 Nfd7 14. Nb2 f5 15. f3 g5 16. Qc2 f4 17. g4 h5 18. h3 h4 19. Bd2 Qe7 20. Nc4 Rc8 21. Rfb1 b5 22. Na5 Nb6 23. Nb3 Na4 24. Nc5 Bf7 25. Nc1 Nxc5 26. bxc5 Na6 27. Bb4 Qe6 28. Bf1 Bf8 29. Be2 Ra7 30. Bd1 Rca8 31. Nb3 Qc8 32. Rc1 Kg7 33. Qb2 Nxb4 34. axb4 Be7 35. Rxa7 Rxa7 36. Ra1 Qa8 37. Rxa7 Qxa7 38. Qa1 Qxa1 39. Nxa1 Kf8 40. Bb3 Be8 41. Kf2 Bd8 42. Ke2 Ke7 43. Kd2 Kd7 44. Kc2 Kc7 45. Be6 Kb7 46. Nb3 Bc7 47. Nd2 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.01"]
[Round "3"]
[White "Oosthout, Wouter"]
[Black "Kat, Rudolf"]
[Result "1-0"]
[ECO "B10"]
[WhiteElo "1906"]
[BlackElo "1895"]
[PlyCount "117"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c6 2. d3 d5 3. Nd2 g6 4. g3 Bg7 5. Bg2 Na6 6. exd5 cxd5 7. Ne2 Nf6 8. Nf3 0-0 9. 0-0 Bd7 10. Ne5 Bc6 11. d4 Rc8 12. Be3 Bb5 13. a4 Bc4 14. c3 Ne4 15. Nxc4 Rxc4 16. Qd3 f5 17. Nf4 Nc7 18. f3 Nd6 19. Kh1 Qe8 20. Rfe1 Rxa4 21. Rac1 Ra2 22. Qb1 Qa4 23. Rc2 Bf6 24. b3 Rxc2 25. bxa4 Rxc3 26. Qb2 Rc4 27. Rc1 Rc8 28. Rxc4 dxc4 29. Bf1 g5 30. Nh3 h6 31. Qc1 Nd5 32. Ng1 c3 33. Bd3 Nb4 34. Qb1 a5 35. Bxf5 Nxf5 36. Qxf5 Rc6 37. Ne2 c2 38. Qxa5 Nd3 39. Qa8+ Kg7 40. Qxb7 Re6 41. Qb3 Rxe3 42. Qxc2 Rxf3 43. a5 Rf1+ 44. Kg2 Ne1+ 45. Kxf1 Nxc2 46. a6 Nxd4 47. a7 Nxe2 48. Kxe2 g4 49. a8Q h5 50. Qe8 Kh6 51. Ke3 Kg5 52. Qg8+ Kh6 53. Kf4 Bg7 54. Kf5 h4 55. Qf7 e6+ 56. Qxe6+ Kh7 57. Qf7 hxg3 58. hxg3 Kh8 59. Kg6 1-0

