[Event "Vienna Kavalier op 6th"]
[Site "Vienna"]
[Date "2011.11.01"]
[Round "7"]
[White "Hach, Otto"]
[Black "Mayrhuber, Franz"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "1622"]
[PlyCount "42"]
[EventDate "2011.10.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 d4 3. Nce2 e5 4. Ng3 Nf6 5. Nf3 Nc6 6. Bc4 Bd6 7. 0-0 Bg4 8. d3 0-0 9. h3 Bd7 10. Bd2 h6 11. Qe2 Ne7 12. c3 c5 13. a3 Ng6 14. Qd1 Qc8 15. Qc2 Kh7 16. b4 Bxh3 17. bxc5 Bxc5 18. cxd4 Bxd4 19. Nxd4 exd4 20. Bxf7 Rxf7 21. Qxc8 Bxc8 0-1

[Event "Vienna Kavalier op 6th"]
[Site "Vienna"]
[Date "2011.10.31"]
[Round "6"]
[White "Lucaci, Marius"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "2123"]
[BlackElo "1622"]
[PlyCount "41"]
[EventDate "2011.10.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. f4 e6 6. Nf3 Nh6 7. Be3 Nf5 8. Bf2 cxd4 9. cxd4 Bb4+ 10. Nc3 0-0 11. Bd3 Bd7 12. 0-0 Bxc3 13. bxc3 Na5 14. g4 Ne7 15. Bh4 Nc4 16. Qe2 Rc8 17. f5 Qe8 18. f6 gxf6 19. Bxf6 Ng6 20. Bxc4 dxc4 21. Qe3 1-0

[Event "Vienna Kavalier op 6th"]
[Site "Vienna"]
[Date "2011.10.28"]
[Round "5"]
[White "Schmall, Wilhelm"]
[Black "Hach, Otto"]
[Result "0-1"]
[ECO "E21"]
[BlackElo "1622"]
[PlyCount "128"]
[EventDate "2011.10.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 0-0 5. Bg5 h6 6. Bxf6 Qxf6 7. a3 Bxc3+ 8. bxc3 d6 9. e3 b6 10. Bd3 Bb7 11. e4 Nd7 12. 0-0 e5 13. Qa4 Qe7 14. Nd2 c5 15. Nf3 Rfe8 16. Rad1 Nf6 17. Qc2 Qc7 18. h3 exd4 19. cxd4 Bxe4 20. Bxe4 Rxe4 21. d5 Rae8 22. Rfe1 Rxe1+ 23. Rxe1 Rxe1+ 24. Nxe1 Qe7 25. Kf1 Nd7 26. a4 Ne5 27. Qe4 Qd7 28. Qc2 Qd8 29. Qe4 Ng6 30. Ke2 Qd7 31. Qc2 Qe7+ 32. Kf1 Qe5 33. Qe2 Qxe2+ 34. Kxe2 Ne5 35. Kd2 Nxc4+ 36. Kc3 Na5 37. Nc2 g5 38. Ne3 Kh7 39. Nf5 Nb7 40. g4 a6 41. Ne7 b5 42. axb5 axb5 43. Nc6 Kg7 44. Na7 b4+ 45. Kb3 Kf8 46. Nc8 Ke8 47. Nb6 Ke7 48. Nc4 f6 49. Ne3 Kf7 50. Nf5 Kg6 51. Ne7+ Kh7 52. Nf5 Kg6 53. f3 Na5+ 54. Kb2 Nc4+ 55. Kb3 Nb6 56. Ne3 h5 57. Kb2 c4 58. Nf5 c3+ 59. Kb3 Nxd5 60. Nxd6 h4 61. Nc4 Kf7 62. Nd6+ Ke6 63. Ne4 Ke5 64. Kc2 Kf4 0-1

[Event "Vienna Kavalier op 6th"]
[Site "Vienna"]
[Date "2011.10.27"]
[Round "4"]
[White "Hach, Otto"]
[Black "Haslinger, Ewald"]
[Result "0-1"]
[ECO "A03"]
[WhiteElo "1622"]
[BlackElo "1713"]
[PlyCount "123"]
[EventDate "2011.10.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. Nc3 Nf6 2. f4 d5 3. e3 Nc6 4. Nf3 e6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Ne5 Bc5 8. d4 Bb4 9. Bd2 Nd7 10. Nf3 0-0 11. 0-0 b6 12. Ne2 Bd6 13. Ng3 Bb5 14. Re1 c5 15. Kh1 Qc7 16. c3 Bd3 17. Bc1 c4 18. Qd2 Nf6 19. Ne5 Ne4 20. Nxe4 Bxe4 21. Kg1 f6 22. Nf3 g5 23. Rf1 g4 24. Nh4 Qg7 25. g3 Be7 26. f5 e5 27. Rf2 Bd6 28. a4 Kh8 29. Qd1 Rg8 30. a5 b5 31. a6 Qd7 32. Bd2 Rg5 33. b3 Rb8 34. b4 Rb6 35. Ra5 Bc7 36. dxe5 Bxe5 37. Qe2 Qc6 38. Qd1 Rxa6 39. Qa1 Rxa5 40. Qxa5 a6 41. Qd8+ Rg8 42. Qa5 Qc8 43. Qa1 Rg5 44. Qd1 Qc7 45. Qe1 a5 46. bxa5 Qxa5 47. Qc1 Bd6 48. Qb2 Bc5 49. Kf1 Qb6 50. Kg1 Bxe3 51. Bxe3 Qxe3 52. Qxb5 Qxc3 53. Ng6+ Kg7 54. Qd7+ Kh6 55. Qc8 Qb4 56. Qe6 Bxf5 57. Rxf5 Rxf5 58. Qxf5 Qe1+ 59. Kg2 Qe2+ 60. Kg1 Qe3+ 61. Kf1 hxg6 62. Qxf6 0-1

[Event "Vienna Kavalier op 6th"]
[Site "Vienna"]
[Date "2011.10.26"]
[Round "3"]
[White "Erholsam Holzer, Leo"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "A03"]
[BlackElo "1622"]
[PlyCount "47"]
[EventDate "2011.10.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. Nc3 Nf6 2. f4 d5 3. d4 Bf5 4. Nf3 h6 5. e3 c6 6. Bd3 Bxd3 7. cxd3 e6 8. 0-0 Be7 9. Bd2 0-0 10. Rc1 Nbd7 11. Ne2 Rc8 12. b4 Qb6 13. Ne5 a6 14. Ng3 Rfd8 15. Kh1 Nxe5 16. fxe5 Nh7 17. Qh5 Rf8 18. Qg4 Rfe8 19. Nh5 Bf8 20. h4 Rc7 21. Rf3 Ree7 22. Rcf1 Kh8 23. Nxg7 h5 24. Nxh5 1-0

[Event "Vienna Kavalier op 6th"]
[Site "Vienna"]
[Date "2011.10.25"]
[Round "2"]
[White "Hach, Otto"]
[Black "Liedlbauer, Thomas"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "1622"]
[PlyCount "69"]
[EventDate "2011.10.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. Nc3 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 c5 5. Nf3 Nf6 6. Bg5 Be7 7. e3 0-0 8. Be2 Nfd7 9. Bxe7 Qxe7 10. 0-0 Nf6 11. h3 Bf5 12. Bd3 Bxd3 13. Qxd3 Nc6 14. Rfd1 Rad8 15. Qe2 Ne4 16. Nd5 Qe6 17. c4 Ne7 18. Qc2 Nf6 19. Ng5 g6 20. Nxe6 fxe6 21. Nxe7+ Kh8 22. Nxg6+ hxg6 23. Qxg6 Rd7 24. Qc2 Rg7 25. Rxd6 Rfg8 26. f3 Re7 27. Rad1 Ne8 28. Rd7 Rxd7 29. Rxd7 Nf6 30. Qc3 Rf8 31. Rxb7 a6 32. Qe5 a5 33. Qg5 Rg8 34. Qxf6+ Rg7 35. Qxg7# 1-0

[Event "Vienna Kavalier op 6th"]
[Site "Vienna"]
[Date "2011.10.24"]
[Round "1"]
[White "Schweitzer, Werner"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "B16"]
[WhiteElo "2060"]
[BlackElo "1622"]
[PlyCount "55"]
[EventDate "2011.10.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Bc4 Bf5 7. Nf3 Nd7 8. Bf4 Nb6 9. Bb3 e6 10. Qd2 Bd6 11. Nh4 Bg6 12. 0-0-0 Nd5 13. Bg3 Qc7 14. Kb1 0-0-0 15. Ka1 Kb8 16. c4 Ne7 17. Qc3 Bxg3 18. hxg3 Bh5 19. Nf3 Bg4 20. Rde1 Bxf3 21. gxf3 Qb6 22. d5 cxd5 23. Qxf6 dxc4 24. Bxc4 Qc7 25. Qxf7 Qxc4 26. Qxe7 Rhe8 27. Qxh7 Rd2 28. Rc1 1-0

[Event "Vienna Kavalier op 4th"]
[Site "Vienna"]
[Date "2009.11.01"]
[Round "5"]
[White "Hach, Otto"]
[Black "Veitsch, Norbert"]
[Result "1/2-1/2"]
[ECO "C41"]
[PlyCount "69"]
[EventDate "2009.10.29"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "AUT"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. Nc3 Nf6 2. e4 e5 3. Nf3 d6 4. Be2 Be7 5. 0-0 0-0 6. d4 Nbd7 7. dxe5 dxe5 8. Bg5 c6 9. Qd2 Qc7 10. Rad1 Rd8 11. Qc1 b5 12. Bxf6 Bxf6 13. Rd2 Nf8 14. Rxd8 Bxd8 15. Qd2 Bg4 16. Rd1 Be7 17. Qc1 Ng6 18. h3 Be6 19. Bf1 h6 20. Ne2 Rd8 21. a3 Rd7 22. Ng3 Rxd1 23. Qxd1 Bd6 24. Qd2 Ne7 25. Qc3 a5 26. b4 axb4 27. axb4 f5 28. Qb2 f4 29. Ne2 g5 30. Nc1 Ng6 31. Nd3 g4 32. hxg4 Bxg4 33. Nh2 Be6 34. Nf3 Bg4 35. Nh2 1/2-1/2

[Event "Vienna Kavalier op 4th"]
[Site "Vienna"]
[Date "2009.11.01"]
[Round "4"]
[White "Nachtnebel, Harry"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "B17"]
[PlyCount "103"]
[EventDate "2009.10.29"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "AUT"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Ng3 e6 6. Nf3 Nbd7 7. Bd3 Bd6 8. 0-0 0-0 9. c4 Re8 10. Qc2 Nf8 11. Bd2 b6 12. Bc3 Ba6 13. Rad1 Qc7 14. Rfe1 Rac8 15. Ne5 c5 16. dxc5 bxc5 17. b3 Bb7 18. Qb2 Be7 19. Rd2 Ng6 20. Nxg6 hxg6 21. Ne4 Nxe4 22. Bxe4 Bf8 23. Bxb7 Qxb7 24. Red1 Qb6 25. Rd7 Red8 26. Qd2 Be7 27. Ba5 Rxd7 28. Qxd7 Qa6 29. Qxe7 Qxa5 30. Qd7 Qc7 31. Qxc7 Rxc7 32. Rd8+ Kh7 33. Kf1 g5 34. Ke2 Kg6 35. Kf3 Kf5 36. g4+ Ke5 37. Ke3 g6 38. f3 Kf6 39. Ke4 Kg7 40. Ra8 Kf6 41. Re8 Rc6 42. Rb8 Rc7 43. a4 Rc6 44. Rb7 Rb6 45. Rxb6 axb6 46. b4 cxb4 47. c5 Ke7 48. cxb6 Kd6 49. Kd4 Kc6 50. a5 f5 51. Kc4 fxg4 52. fxg4 1-0

[Event "Vienna Kavalier op 4th"]
[Site "Vienna"]
[Date "2009.10.31"]
[Round "3"]
[White "Hach, Otto"]
[Black "Zampach, Peter"]
[Result "1-0"]
[ECO "B08"]
[PlyCount "101"]
[EventDate "2009.10.29"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "AUT"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. Nc3 Nf6 2. e4 d6 3. d4 g6 4. Nf3 Bg7 5. Bc4 0-0 6. 0-0 Nc6 7. h3 Nxe4 8. Nxe4 d5 9. Bxd5 Qxd5 10. Re1 Nxd4 11. Nxd4 Qxd4 12. Qxd4 Bxd4 13. c3 Bg7 14. Bf4 e5 15. Bg3 f5 16. Nc5 Re8 17. Rad1 Bf6 18. Nd7 Bxd7 19. Rxd7 Rac8 20. f3 f4 21. Bf2 b6 22. Kf1 Re7 23. Rxe7 Bxe7 24. Rxe5 Kf7 25. Rd5 Bd6 26. Rd2 g5 27. Re2 Re8 28. Rxe8 Kxe8 29. Ke2 Kf7 30. Kd3 c5 31. Kc4 Ke6 32. Kb5 Kd7 33. Ka6 Kc6 34. Kxa7 b5 35. Ka6 c4 36. Bd4 Be7 37. Ka7 Bd8 38. Kb8 Be7 39. Kc8 Kd5 40. Kc7 Bd6+ 41. Kb6 b4 42. Kb5 bxc3 43. bxc3 Be7 44. a4 h5 45. a5 Bd6 46. a6 Bb8 47. a7 Bxa7 48. Bxa7 g4 49. hxg4 hxg4 50. Bb8 gxf3 51. gxf3 1-0

[Event "Vienna Kavalier op 4th"]
[Site "Vienna"]
[Date "2009.10.30"]
[Round "2"]
[White "Schirhagl, Romana"]
[Black "Hach, Otto"]
[Result "1/2-1/2"]
[ECO "B14"]
[WhiteElo "1888"]
[PlyCount "54"]
[EventDate "2009.10.29"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "AUT"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Nc6 7. c5 Be7 8. Be2 0-0 9. 0-0 Re8 10. a3 h6 11. b4 Ne4 12. Qc2 Nxc3 13. Qxc3 Bf6 14. Bf4 Bd7 15. Rad1 Rc8 16. Bd6 Ne7 17. Bd3 Nf5 18. Bxf5 exf5 19. Rfe1 Be6 20. Qb3 Qd7 21. Ne5 Bxe5 22. Bxe5 f6 23. Bd6 Bf7 24. Rxe8+ Rxe8 25. Qc3 Re4 26. h3 Qb5 27. Re1 a6 1/2-1/2

[Event "Vienna Kavalier op 4th"]
[Site "Vienna"]
[Date "2009.10.29"]
[Round "1"]
[White "Hach, Otto"]
[Black "Matejovic, Juraj"]
[Result "0-1"]
[ECO "C00"]
[BlackElo "2239"]
[PlyCount "68"]
[EventDate "2009.10.29"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "AUT"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 e6 3. d3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Ng3 b6 7. Be2 Bb7 8. 0-0 Be7 9. d4 0-0 10. c3 c5 11. Bd2 Rc8 12. Rc1 Qc7 13. Qe1 Rfd8 14. h3 Bd6 15. Be3 Bf4 16. Bxf4 Qxf4 17. Rd1 Nd5 18. dxc5 Nxc5 19. Rd4 Qc7 20. Nh2 e5 21. Rd2 Nf4 22. Bf3 Ba6 23. Be2 Nxe2+ 24. Nxe2 Nd3 25. Qd1 Nxb2 26. Rxd8+ Qxd8 27. Qc2 Nc4 28. Rd1 Qe8 29. Nf3 Bb7 30. Qf5 h6 31. Qh5 e4 32. Nfd4 Rc5 33. Qh4 Rg5 34. Ng3 Ne5 0-1

[Event "Vienna op-B 15th"]
[Site "Vienna"]
[Date "2006.??.??"]
[Round "2"]
[White "Dietrich, Markus"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "D04"]
[PlyCount "57"]
[EventDate "2006.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. e3 Bg4 4. h3 Bh5 5. g4 Bg6 6. Ne5 Nbd7 7. h4 h6 8. Nxg6 fxg6 9. Bd3 Kf7 10. h5 g5 11. c4 e6 12. Bg6+ Kg8 13. cxd5 exd5 14. f3 Bb4+ 15. Bd2 a5 16. Kf2 Nf8 17. Bf5 Qd6 18. Bc3 Re8 19. a3 Bxc3 20. Nxc3 Qb6 21. Na4 Qd6 22. Rc1 Re7 23. Nc5 Kf7 24. Qc2 Ke8 25. Nxb7 Qb6 26. Qc6+ N6d7 27. Qxc7 Qxb2+ 28. Rc2 Qb3 29. Nd6# 1-0

[Event "Vienna op-B 15th"]
[Site "Vienna"]
[Date "2006.??.??"]
[Round "6"]
[White "Gindl, Herbert"]
[Black "Hach, Otto"]
[Result "0-1"]
[ECO "B01"]
[PlyCount "46"]
[EventDate "2006.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 c6 6. Bd3 g6 7. 0-0 Bg4 8. h3 Bxf3 9. Qxf3 Qd8 10. Be3 Bg7 11. Ne2 0-0 12. c3 Nbd7 13. Ng3 e5 14. dxe5 Nxe5 15. Qe2 Qxd3 16. Qe1 Rfd8 17. Bd4 Ned7 18. Rd1 Qb5 19. Rd2 Re8 20. Qd1 Bh6 21. a4 Qa6 22. Rd3 Re6 23. Re1 Rxe1+ 0-1

[Event "Vienna op-B 15th"]
[Site "Vienna"]
[Date "2006.??.??"]
[Round "1"]
[White "Hach, Otto"]
[Black "Hessenberger, Andreas"]
[Result "0-1"]
[ECO "A00"]
[PlyCount "16"]
[EventDate "2006.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 d4 3. Nce2 e5 4. Ng3 Be6 5. Bb5+ Nd7 6. Nf3 Bd6 7. d3 c6 8. Ba4 Qa5+ 0-1

[Event "Vienna op-B 15th"]
[Site "Vienna"]
[Date "2006.??.??"]
[Round "3"]
[White "Hach, Otto"]
[Black "Niesswohl, Werner"]
[Result "1/2-1/2"]
[ECO "A00"]
[PlyCount "62"]
[EventDate "2006.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. Nc3 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 Qf6 6. Qe4+ Qe7 7. Bf4 Qxe4 8. Nxe4 d6 9. 0-0-0 a5 10. Nc3 g6 11. Nd5 Kd8 12. e4 Be6 13. Kb1 Bxd5 14. exd5 Nf6 15. f3 Bg7 16. Bb5 h6 17. Rhe1 a4 18. Bc1 Ra5 19. Bc4 Nd7 20. a3 Nb6 21. Ba2 Re8 22. c4 Nd7 23. Rxe8+ Kxe8 24. Bd2 Ra6 25. Re1+ Kd8 26. Re2 Nc5 27. Kc2 Rb6 28. Bc1 Kd7 29. Bb1 Nb3 30. Be3 Na1+ 31. Kc1 Nb3+ 1/2-1/2

[Event "Vienna op-B 15th"]
[Site "Vienna"]
[Date "2006.??.??"]
[Round "5"]
[White "Hach, Otto"]
[Black "Posch, Thomas"]
[Result "0-1"]
[ECO "C45"]
[PlyCount "58"]
[EventDate "2006.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. Nc3 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 Nf6 6. e4 d6 7. Bc4 Be7 8. 0-0 0-0 9. f3 c6 10. Rd1 b5 11. Bf1 Nd7 12. Qf2 Ne5 13. Be3 a6 14. Bb6 Qe8 15. Be3 Be6 16. b3 f5 17. Qd2 Qg6 18. Kh1 Rf7 19. exf5 Bxf5 20. Ne2 Raf8 21. Nf4 Qf6 22. Qf2 g5 23. Nh5 Qg6 24. Ng3 Be6 25. Be2 h5 26. Qg1 d5 27. Bd4 Bd6 28. Qe3 h4 29. Nf1 Nd7 0-1

[Event "Vienna op-B 15th"]
[Site "Vienna"]
[Date "2006.??.??"]
[Round "7"]
[White "Hach, Otto"]
[Black "Vokroj, Gabriela"]
[Result "0-1"]
[ECO "B17"]
[BlackElo "1867"]
[PlyCount "44"]
[EventDate "2006.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 dxe4 3. Nxe4 Nd7 4. Bc4 Ngf6 5. Ng3 e6 6. Nf3 Bd6 7. d4 c6 8. 0-0 0-0 9. Re1 b5 10. Bd3 Qc7 11. c3 a5 12. Qc2 Re8 13. Bg5 h6 14. Bxf6 Nxf6 15. Ne5 b4 16. Rac1 bxc3 17. Qxc3 Bb4 18. Qxc6 Qxc6 19. Nxc6 Bxe1 20. Rxe1 Bb7 21. Bb5 Kf8 22. Nxa5 Rxa5 0-1

[Event "Vienna op-B 15th"]
[Site "Vienna"]
[Date "2006.??.??"]
[Round "9"]
[White "Muhr, Andreas"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "A17"]
[PlyCount "41"]
[EventDate "2006.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e3 Nf6 2. c4 e6 3. Nc3 b6 4. Be2 Bb7 5. Bf3 Bxf3 6. Nxf3 Be7 7. d4 d5 8. cxd5 exd5 9. Qe2 0-0 10. 0-0 Re8 11. Rd1 a6 12. Bd2 Bd6 13. Qf1 Nbd7 14. Kh1 b5 15. b3 Nb6 16. Rac1 Rc8 17. Ne2 c5 18. Ba5 Nfd7 19. dxc5 Bxc5 20. Rxd5 Qf6 21. Bxb6 1-0

[Event "Vienna op-B 15th"]
[Site "Vienna"]
[Date "2006.??.??"]
[Round "8"]
[White "Ruck, Helmut"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "A46"]
[PlyCount "57"]
[EventDate "2006.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. Bg5 c6 4. e3 Qa5+ 5. c3 Ne4 6. Bf4 Be7 7. Bd3 Nf6 8. h3 b5 9. 0-0 Ba6 10. b4 Qd8 11. Qc2 d6 12. Nbd2 Nbd7 13. a3 Qc8 14. c4 Nb6 15. c5 dxc5 16. dxc5 Nbd7 17. Rfd1 Nd5 18. Bh2 Bf6 19. Rac1 g6 20. Ne4 0-0 21. Nd6 Qd8 22. e4 Ne7 23. Bf4 e5 24. Bh6 Bg7 25. Qd2 Qc7 26. Bc2 Bc8 27. Bb3 a5 28. Bxg7 Kxg7 29. Nxc8 1-0

[Event "Vienna op-B 15th"]
[Site "Vienna"]
[Date "2006.??.??"]
[Round "4"]
[White "Suetzl, Wolfgang"]
[Black "Hach, Otto"]
[Result "0-1"]
[ECO "A65"]
[PlyCount "82"]
[EventDate "2006.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. d5 exd5 5. cxd5 d6 6. e4 Na6 7. Nf3 Nc7 8. a4 g6 9. Bd3 Bg7 10. 0-0 0-0 11. Re1 Re8 12. Bf4 Nh5 13. Bg5 Nf6 14. Rb1 b6 15. b4 cxb4 16. Rxb4 Na6 17. Bxa6 Bxa6 18. Nb5 Bxb5 19. axb5 Qd7 20. Qd3 Rac8 21. Nd4 Nxd5 22. Rbb1 Ne7 23. f3 Rc7 24. Red1 Qc8 25. Bxe7 Rexe7 26. Nc6 Red7 27. Rbc1 a6 28. Qa3 axb5 29. Rxd6 Bf8 30. Rxd7 Bxa3 31. Ne7+ Bxe7 32. Rcxc7 Bc5+ 33. Kf1 Qe8 34. Ke2 Qe6 35. Rxf7 Qxf7 36. Rxf7 Kxf7 37. Kd3 g5 38. g3 Ke6 39. f4 gxf4 40. gxf4 Bd6 41. e5 Bxe5 0-1

[Event "Vienna-chB"]
[Site "Vienna"]
[Date "2005.10.30"]
[Round "9"]
[White "Lackner, Richard"]
[Black "Hach, Otto"]
[Result "0-1"]
[ECO "A20"]
[PlyCount "44"]
[EventDate "2005.10.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nf6 3. Bg2 Nc6 4. Nf3 d6 5. 0-0 Rb8 6. Nc3 Be7 7. d4 exd4 8. Nxd4 Bd7 9. Nxc6 Bxc6 10. Nd5 Nxd5 11. cxd5 Bd7 12. Be3 a6 13. Qb3 0-0 14. Ba7 Ra8 15. Qxb7 Qc8 16. Qxc8 Bxc8 17. Bd4 Bd7 18. Rfc1 Rfc8 19. Rc2 Bd8 20. Rac1 Rab8 21. e4 Rb4 22. b3 Rxd4 0-1

[Event "Vienna-chB"]
[Site "Vienna"]
[Date "2005.10.29"]
[Round "8"]
[White "Kuda, Heinz"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "B09"]
[PlyCount "59"]
[EventDate "2005.10.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 d6 2. d4 g6 3. Nc3 Bg7 4. f4 Nf6 5. Bd3 a6 6. Nf3 Bg4 7. 0-0 0-0 8. Be3 Nbd7 9. h3 Bxf3 10. Qxf3 c6 11. e5 Ne8 12. Qg4 e6 13. Qe2 Nb6 14. Ne4 Nd5 15. Bd2 Ne7 16. Kh1 Nf5 17. Qf2 dxe5 18. dxe5 Nc7 19. Ba5 Qe7 20. g4 Nh6 21. Bb6 Rfb8 22. c4 Bf8 23. Bc5 Qd8 24. Nf6+ Kg7 25. Bxf8+ Kxf8 26. Rad1 Qe7 27. g5 Nf5 28. Bxf5 Qxf6 29. exf6 gxf5 30. Qh4 1-0

[Event "Vienna-chB"]
[Site "Vienna"]
[Date "2005.10.28"]
[Round "7"]
[White "Hach, Otto"]
[Black "Hrdy, Anton"]
[Result "1/2-1/2"]
[ECO "B07"]
[PlyCount "125"]
[EventDate "2005.10.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. Nc3 Nf6 2. e4 d6 3. d4 g6 4. Be2 Bg7 5. Be3 Nbd7 6. Qd2 e5 7. d5 0-0 8. h3 a6 9. g4 Nc5 10. Bd3 Bd7 11. Nge2 b5 12. Ng3 b4 13. Nce2 Nxd3+ 14. cxd3 Bb5 15. Rc1 a5 16. f3 Ne8 17. Kf2 f6 18. Kg2 Qc8 19. h4 Qa6 20. Rhd1 Rc8 21. h5 Rf7 22. hxg6 hxg6 23. d4 c6 24. dxc6 Rxc6 25. d5 Rxc1 26. Rxc1 Rc7 27. Kf2 Bc4 28. a3 Qb5 29. axb4 axb4 30. Qe1 Bd3 31. Rxc7 Nxc7 32. Qc1 Qc4 33. Qxc4 Bxc4 34. Ke1 Kf7 35. Kd2 Ke7 36. Kc2 Na6 37. b3 Bb5 38. Nc1 Nc5 39. Bd2 Na6 40. Na2 Bf8 41. Nxb4 Nxb4+ 42. Bxb4 Kf7 43. Bd2 Be7 44. Ba5 Ke8 45. Bb6 Kf7 46. Kc3 Ke8 47. Kb4 Bd3 48. Ka5 Bc2 49. b4 Bd1 50. b5 Bxf3 51. Bc7 Bxg4 52. Ka6 Bc8+ 53. Ka7 Kd7 54. Ba5 Bd8 55. b6 Bxb6+ 56. Bxb6 Ke7 57. Be3 f5 58. Bg5+ Kf7 59. Kb6 f4 60. Kc7 Bg4 61. Kxd6 fxg3 62. Kxe5 g2 63. Be3 1/2-1/2

[Event "Vienna-chB"]
[Site "Vienna"]
[Date "2005.10.27"]
[Round "6"]
[White "Hach, Otto"]
[Black "Mutschlechner, Robert"]
[Result "1/2-1/2"]
[ECO "C00"]
[BlackElo "1976"]
[PlyCount "115"]
[EventDate "2005.10.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 e6 3. Nf3 Nf6 4. e5 Nfd7 5. Ne2 c5 6. Ng3 Nc6 7. Bb5 Qc7 8. Bxc6 bxc6 9. Qe2 a5 10. 0-0 Ba6 11. d3 c4 12. Rd1 cxd3 13. cxd3 c5 14. Qe3 d4 15. Qf4 h6 16. Nh5 Bb7 17. Re1 Rc8 18. Qg3 g6 19. Nf6+ Nxf6 20. exf6 Qxg3 21. fxg3 Bd6 22. b3 g5 23. Ne5 0-0 24. Bd2 Bc7 25. Rac1 Bd8 26. Rf1 Bc6 27. Rxc5 Bb7 28. Rxc8 Bxc8 29. Nc6 Bb6 30. Bxa5 Bxa5 31. Nxa5 Bd7 32. Nc4 Rb8 33. Ne5 Bb5 34. Rc1 Ra8 35. a4 Be8 36. Rc4 Kh7 37. Rxd4 Rb8 38. b4 Bxa4 39. Rc4 Be8 40. Rd4 Rb5 41. Re4 Rd5 42. Kf2 Kg8 43. g4 Bb5 44. Ke2 Kh7 45. g3 Kh8 46. Kd2 Kh7 47. Kc3 Kg8 48. Re3 Kh7 49. Re1 Kg8 50. d4 Rd8 51. Ra1 Rc8+ 52. Kd2 Re8 53. Ke3 Rc8 54. Ra7 Be8 55. Kd2 Rd8 56. Kc3 Rc8+ 57. Kb3 Rd8 58. Kc3 1/2-1/2

[Event "Vienna-chB"]
[Site "Vienna"]
[Date "2005.10.26"]
[Round "5"]
[White "Schreiber, Ewald"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "A41"]
[PlyCount "71"]
[EventDate "2005.10.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 d6 2. c4 e5 3. d5 Be7 4. e4 Na6 5. Nc3 Bg5 6. Nf3 Bxc1 7. Rxc1 h6 8. Be2 Nf6 9. b4 0-0 10. a3 Bd7 11. 0-0 Bg4 12. Nd2 Qd7 13. Bxg4 Nxg4 14. h3 Nf6 15. Qe2 Qe7 16. Nd1 Nd7 17. Ne3 Rae8 18. Nf5 Qf6 19. Rc3 Kh7 20. g4 g6 21. Ng3 Qh4 22. Kh2 Nab8 23. f4 exf4 24. Rxf4 Ne5 25. Nf3 Nxf3+ 26. Rcxf3 f6 27. Qf2 Nd7 28. Rc3 Rf7 29. Qxa7 Ne5 30. Kg2 b6 31. Qa4 Rfe7 32. Qc2 Qg5 33. Qf2 Kg7 34. h4 Nxg4 35. hxg5 Nxf2 36. gxf6+ 1-0

[Event "Vienna-chB"]
[Site "Vienna"]
[Date "2005.10.25"]
[Round "4"]
[White "Hach, Otto"]
[Black "Ruck, Helmut"]
[Result "1/2-1/2"]
[ECO "B11"]
[PlyCount "32"]
[EventDate "2005.10.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 c6 3. Qf3 e6 4. d3 Bb4 5. exd5 exd5 6. d4 Nf6 7. Bg5 Nbd7 8. Qe3+ Qe7 9. Qxe7+ Kxe7 10. Bd3 h6 11. Bh4 Re8 12. Nge2 Kf8 13. 0-0-0 Bd6 14. f3 b5 15. Bg3 Bxg3 16. Nxg3 Nb6 1/2-1/2

[Event "Vienna-chB"]
[Site "Vienna"]
[Date "2005.10.24"]
[Round "3"]
[White "Gerold, Arnold"]
[Black "Hach, Otto"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "1977"]
[PlyCount "96"]
[EventDate "2005.10.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 d6 2. d4 g6 3. Nc3 Bg7 4. Be3 Nf6 5. f3 c6 6. Qd2 Be6 7. 0-0-0 d5 8. e5 Nfd7 9. h4 h6 10. g4 a5 11. Nh3 Nb6 12. Nf4 Qd7 13. Nxe6 Qxe6 14. Bd3 Nc4 15. Bxc4 dxc4 16. g5 h5 17. f4 0-0 18. d5 cxd5 19. Qxd5 Qc8 20. Qc5 e6 21. Ne4 Na6 22. Qxc8 Rfxc8 23. Rd7 Rc7 24. Rhd1 Bf8 25. Rd8 Rac8 26. Nf6+ Kh8 27. Bb6 Rc6 28. Bxa5 Kg7 29. Rxc8 Rxc8 30. Rd7 Bc5 31. Bd2 Bf2 32. Ne4 Bxh4 33. Ba5 Nc5 34. Nxc5 Rxc5 35. Bd8 Rc8 36. Bb6 Bg3 37. Be3 h4 38. Rd1 h3 39. a4 h2 40. a5 Rd8 41. Rf1 Rd5 42. c3 Rxa5 43. Kc2 Rd5 44. b3 b5 45. b4 Rd3 46. Bd2 Rxd2+ 47. Kxd2 Bxf4+ 48. Ke2 Bxe5 0-1

[Event "Vienna-chB"]
[Site "Vienna"]
[Date "2005.10.23"]
[Round "2"]
[White "Hach, Otto"]
[Black "Unger, Albert"]
[Result "1/2-1/2"]
[ECO "A00"]
[PlyCount "78"]
[EventDate "2005.10.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 d4 3. Nce2 c5 4. Ng3 a6 5. Nf3 Nc6 6. a3 Qc7 7. Bc4 e6 8. d3 Bd6 9. Qe2 Bd7 10. c3 Nge7 11. Bd2 Ng6 12. Nh5 0-0 13. 0-0 Nf4 14. Nxf4 Bxf4 15. b4 b5 16. Bb3 Bxd2 17. Qxd2 dxc3 18. Qxc3 cxb4 19. axb4 Rfc8 20. Rfb1 Qd6 21. Bd1 Ne7 22. Qd2 e5 23. Be2 f6 24. Qb2 Be6 25. d4 exd4 26. Nxd4 Bf7 27. Bg4 Rd8 28. Rd1 Qe5 29. Qc3 Bc4 30. Qe3 g5 31. g3 h6 32. Kg2 Qc7 33. Rac1 Qb6 34. Nf5 Qxe3 35. Nxe7+ Kf7 36. fxe3 Kxe7 37. Rd4 Rd6 38. Rxd6 Kxd6 39. Rd1+ Ke7 1/2-1/2

[Event "Vienna-chB"]
[Site "Vienna"]
[Date "2005.10.22"]
[Round "1"]
[White "Hampel, Otfried"]
[Black "Hach, Otto"]
[Result "0-1"]
[ECO "A25"]
[PlyCount "79"]
[EventDate "2005.10.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nf6 3. Bg2 Nc6 4. Nc3 d6 5. e3 Be6 6. b3 Rb8 7. Nge2 d5 8. cxd5 Nxd5 9. 0-0 Be7 10. Bb2 Qd7 11. d4 exd4 12. Nxd4 Nxd4 13. Qxd4 Bf6 14. Qxa7 0-0 15. Rfd1 Bxc3 16. Bxc3 b6 17. Qa3 Qb5 18. Bd4 f6 19. Rac1 Ra8 20. Qb2 Rac8 21. e4 Ne7 22. f3 c5 23. Bf1 Qe8 24. Be3 Rd8 25. Bf4 Nc8 26. Bd3 Qh5 27. Qe2 Na7 28. Bc7 Nc6 29. Bxd8 Nd4 30. Qf2 Nxf3+ 31. Kh1 Rxd8 32. Be2 Rxd1+ 33. Rxd1 Bg4 34. Bc4+ Kf8 35. Rd5 Ne5 36. Bf1 Qg5 37. Bg2 Qc1+ 38. Qg1 Qb2 39. Rd1 Qxa2 40. Ra1 0-1

[Event "Vienna op-C 14th"]
[Site "Vienna"]
[Date "2003.08.??"]
[Round "?"]
[White "Hach, Otto"]
[Black "Ardocker, Franz"]
[Result "1-0"]
[ECO "B00"]
[PlyCount "90"]
[EventDate "2003.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. Nc3 Nc6 2. e4 d6 3. d4 Bd7 4. Nf3 g6 5. Be3 Bg7 6. Bc4 e6 7. 0-0 Nf6 8. a3 a6 9. Re1 0-0 10. Qd2 Ne7 11. Bh6 Ng4 12. Bxg7 Kxg7 13. Rad1 f6 14. h3 Nh6 15. Qe2 Nf7 16. e5 fxe5 17. dxe5 d5 18. Bd3 c5 19. Qd2 c4 20. Bxc4 Qb6 21. Qc1 Qc7 22. Bd3 Nc6 23. Nxd5 exd5 24. e6 Nfe5 25. Nxe5 Nxe5 26. exd7 Rad8 27. Qe3 Nxd7 28. Qd4+ Nf6 29. Re6 Rd6 30. Rde1 Rxe6 31. Rxe6 Qd7 32. Qe5 Qd8 33. g4 Re8 34. g5 Rxe6 35. Qxe6 Ne8 36. Qe5+ Kg8 37. Be2 Ng7 38. Bf3 d4 39. Bd5+ Kf8 40. Bxb7 a5 41. Bd5 Nf5 42. Qh8+ Ke7 43. Qxh7+ Kf8 44. Qh8+ Ke7 45. Qf6+ Kd7 1-0

[Event "Vienna op-C 14th"]
[Site "Vienna"]
[Date "2003.08.??"]
[Round "?"]
[White "Hach, Otto"]
[Black "Engels, Joerg"]
[Result "1-0"]
[ECO "C50"]
[PlyCount "93"]
[EventDate "2003.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. Nc3 e5 2. e4 Bc5 3. Nf3 Nc6 4. Bc4 d6 5. 0-0 Nf6 6. h3 0-0 7. d3 h6 8. a3 Qe7 9. Ne2 Be6 10. Bxe6 Qxe6 11. Ng3 Rad8 12. Qe2 Nd4 13. Nxd4 Bxd4 14. Nf5 Rfe8 15. Qf3 Kh7 16. Qg3 Nh5 17. Qf3 Qg6 18. Nh4 Qf6 19. Qxh5 Kg8 20. Qg4 Re6 21. Nf5 Kh7 22. Rb1 d5 23. Nxd4 exd4 24. Bd2 dxe4 25. dxe4 c5 26. Rfe1 Rde8 27. Qf5+ Qg6 28. Qxg6+ Kxg6 29. f3 c4 30. Kf2 b5 31. Bb4 Kh5 32. Bc5 d3 33. cxd3 cxd3 34. Rbd1 Rc8 35. Be3 Rc2+ 36. Rd2 Rxd2+ 37. Bxd2 Rc6 38. Rc1 Rc2 39. Rxc2 dxc2 40. g3 Kg6 41. Ke2 Kf6 42. Kd3 g5 43. Kxc2 Ke6 44. Bc3 f5 45. exf5+ Kxf5 46. Kd3 h5 47. Bd2 1-0

[Event "Vienna op-C 14th"]
[Site "Vienna"]
[Date "2003.08.??"]
[Round "?"]
[White "Hach, Otto"]
[Black "Heiny, Michael"]
[Result "1-0"]
[ECO "C11"]
[PlyCount "142"]
[EventDate "2003.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 e6 3. Nf3 Nf6 4. e5 Nfd7 5. d4 c5 6. Bb5 a6 7. Bxd7+ Bxd7 8. 0-0 Nc6 9. Re1 cxd4 10. Nxd4 Bc5 11. Nf3 0-0 12. Be3 Bxe3 13. Rxe3 b5 14. Ne2 Rc8 15. c3 Na5 16. Ned4 Nc4 17. Re2 Rc7 18. Rc1 Qe7 19. Qe1 Rfc8 20. Rec2 Na5 21. Qe2 Nc6 22. Nxc6 Bxc6 23. Qe3 Bb7 24. Nd4 Qd7 25. h3 a5 26. a3 Ba6 27. Qg3 Qe7 28. b4 a4 29. Ne2 Rc4 30. Nd4 Qc7 31. f4 Qb6 32. Kh2 Qd8 33. f5 Qe7 34. fxe6 fxe6 35. Qg4 Re8 36. Rf1 Qc7 37. Qf4 Qd7 38. Rf3 Rcc8 39. Rcf2 Qe7 40. Qg4 Qc7 41. Qg3 Qd7 42. Qf4 Qe7 43. Qg3 Rf8 44. Rxf8+ Rxf8 45. Rxf8+ Kxf8 46. Qg4 Kf7 47. Qh5+ Kg8 48. Qg4 Kf7 49. Qf4+ Ke8 50. Qg3 Kf8 51. Qe3 Qd7 52. Nf3 h6 53. Ne1 Qc7 54. Qd4 Qc4 55. Qxc4 dxc4 56. Nc2 Bc8 57. Nd4 Bd7 58. h4 g5 59. hxg5 hxg5 60. Nf3 Kg7 61. Kg3 Kg6 62. Kg4 Bc6 63. Nxg5 Bxg2 64. Nxe6 Kf7 65. Nd4 Be4 66. Kf4 Bd3 67. Nxb5 Ke6 68. Nc7+ Kd7 69. Nd5 Ke6 70. Nb6 Bc2 71. Nxc4 Bb3 1-0

[Event "Vienna op-C 14th"]
[Site "Vienna"]
[Date "2003.08.??"]
[Round "?"]
[White "Hach, Otto"]
[Black "Hertel, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C11"]
[PlyCount "120"]
[EventDate "2003.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 e6 3. Nf3 Nf6 4. e5 Nfd7 5. d4 c5 6. Be3 c4 7. Bg5 Qa5 8. Be2 Bb4 9. Bd2 Qd8 10. a3 Be7 11. Be3 a6 12. Qd2 h6 13. h4 Nf8 14. g3 Qa5 15. Na2 Qxd2+ 16. Bxd2 Nc6 17. Nb4 Bd7 18. Nxc6 Bxc6 19. Bb4 b5 20. Bxe7 Kxe7 21. c3 Nd7 22. 0-0-0 Nb6 23. Nd2 f5 24. f4 Be8 25. Nf1 Bf7 26. Ne3 Rag8 27. Rdg1 g6 28. Bd1 Kd7 29. Kd2 a5 30. g4 Ke7 31. Rg2 Kf8 32. Rhg1 Rh7 33. gxf5 gxf5 34. Rxg8+ Bxg8 35. Kc2 Rg7 36. Rxg7 Kxg7 37. Nf1 Bf7 38. Ng3 Kf8 39. Nh5 Bxh5 40. Bxh5 Ke7 41. Be2 Nd7 42. Kd2 Nf8 43. Bh5 Nd7 44. Be2 Nb8 45. a4 bxa4 46. Bd1 Nd7 47. Bxa4 Nf8 48. h5 Nd7 49. Kc1 Nb6 50. Bd1 Kd7 51. Kb1 Kc6 52. Ka2 Kd7 53. Ka3 Kc7 54. Be2 Kc6 55. b3 cxb3 56. Kxb3 Kb7 57. Bb5 Kc7 58. Be8 Kd8 59. Bb5 Kc7 60. Ba6 Kc6 1/2-1/2

[Event "Vienna op-C 14th"]
[Site "Vienna"]
[Date "2003.08.??"]
[Round "?"]
[White "Hach, Otto"]
[Black "Passecker, Josef"]
[Result "1/2-1/2"]
[ECO "B02"]
[PlyCount "113"]
[EventDate "2003.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. Nc3 Nf6 2. e4 d5 3. exd5 Nxd5 4. Nxd5 Qxd5 5. Nf3 g6 6. Be2 Bg7 7. 0-0 0-0 8. d4 h6 9. c3 Nd7 10. Bf4 c6 11. Re1 Re8 12. Qd2 Kh7 13. c4 Qf5 14. Bd3 Qf6 15. Rab1 b6 16. h3 Bb7 17. Ne5 Nf8 18. Be4 Rac8 19. Rbd1 e6 20. Qe3 Qe7 21. Qf3 Bxe5 22. dxe5 f6 23. Qh5 f5 24. Qxh6+ Kg8 25. Bg5 Qh7 26. Qxh7+ Nxh7 27. Bh6 fxe4 28. Rd7 Ba6 29. Rg7+ Kh8 30. Rxe4 Ra8 31. Rf4 Rf8 32. Rxh7+ Kxh7 33. Bxf8 g5 34. Rf6 Bxc4 35. b3 Bd5 36. Bb4 Kg7 37. Bd2 Rf8 38. Bxg5 Rxf6 39. exf6+ Kg6 40. Kf1 e5 41. h4 c5 42. f3 b5 43. Ke1 a5 44. Kd2 c4 45. bxc4 Bxc4 46. a3 Bf1 47. f4 exf4 48. Bxf4 Bxg2 49. Be5 Bd5 50. Bc3 a4 51. Ke3 Bc4 52. Ke4 Be2 53. Ke5 Kf7 54. Kd6 Bh5 55. Kc5 Be2 56. h5 Bxh5 57. Kxb5 1/2-1/2

[Event "Vienna op-C 14th"]
[Site "Vienna"]
[Date "2003.08.??"]
[Round "?"]
[White "Mitteregger, Jeff"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "A03"]
[PlyCount "53"]
[EventDate "2003.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 Nc6 5. Bb5 a6 6. Bxc6+ bxc6 7. Bb2 Bg4 8. 0-0 e6 9. Nc3 Be7 10. Ne2 0-0 11. h3 Bh5 12. g4 Bg6 13. Nh4 Nd7 14. Nxg6 hxg6 15. g5 Kh7 16. h4 Rh8 17. Ng3 Kg8 18. h5 Rh7 19. Kf2 gxh5 20. Nxh5 g6 21. Rh1 gxh5 22. Rxh5 Nf8 23. Qg4 Rxh5 24. Qxh5 Ng6 25. Rh1 Kf8 26. Qh8+ Nxh8 27. Rxh8# 1-0

[Event "Vienna op-C 14th"]
[Site "Vienna"]
[Date "2003.08.??"]
[Round "?"]
[White "Poeschl, Markus"]
[Black "Hach, Otto"]
[Result "0-1"]
[ECO "B07"]
[PlyCount "158"]
[EventDate "2003.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be2 Bg7 5. Be3 c6 6. Qd2 Ng4 7. Bg5 f6 8. Bh4 0-0 9. f3 Nh6 10. g4 Nf7 11. f4 c5 12. f5 Bh6 13. Qd3 cxd4 14. Nd5 Nc6 15. fxg6 hxg6 16. a3 Nfe5 17. Qb3 Qa5+ 18. c3 Kg7 19. Qd1 dxc3 20. Nxc3 Be6 21. h3 Rac8 22. Nf3 Nxf3+ 23. Bxf3 Ne5 24. 0-0 Be3+ 25. Bf2 Qc5 26. Nd5 Bxd5 27. exd5 f5 28. g5 Bxf2+ 29. Rxf2 Qe3 30. Qe2 Qxg5+ 31. Rg2 Qf4 32. Rf1 Qd4+ 33. Kh2 Rh8 34. Rfg1 Qf4+ 35. Rg3 Rc2 36. Qxc2 Nxf3+ 37. Kg2 Nxg1 38. Qc3+ Qe5 39. Kxg1 Rd8 40. Re3 Qxc3 41. Rxc3 Rd7 42. Kf2 Kf6 43. Re3 Rc7 44. Re6+ Kf7 45. Re2 Rc5 46. Rd2 Kf6 47. Kf3 Rc4 48. Kg3 a5 49. Kf3 b5 50. Kg3 a4 51. Kf3 g5 52. Kg3 Ke5 53. Re2+ Re4 54. Rd2 e6 55. dxe6 Kxe6 56. Kf3 Ke5 57. Rg2 g4+ 58. hxg4 fxg4+ 59. Kg3 d5 60. Rh2 Kd4 61. Rd2+ Kc4 62. Rc2+ Kd4 63. Rd2+ Kc4 64. Rc2+ Kb3 65. Rc5 Kxb2 66. Rxd5 Kxa3 67. Rxb5 Rb4 68. Rh5 Kb3 69. Re5 a3 70. Re3+ Ka4 71. Re8 a2 72. Kh4 Ka3 73. Re1 Rb1 74. Re3+ Kb4 75. Re4+ Kc3 76. Re3+ Kd4 77. Re8 a1Q 78. Rd8+ Kc5 79. Rc8+ Kd6 0-1

[Event "Vienna op-C 14th"]
[Site "Vienna"]
[Date "2003.08.??"]
[Round "?"]
[White "Rastner, Wilhelm"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "B09"]
[PlyCount "65"]
[EventDate "2003.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 d6 2. f4 Nf6 3. Nc3 g6 4. d4 Bg7 5. Nf3 c5 6. dxc5 Qa5 7. Bb5+ Bd7 8. Bxd7+ Nbxd7 9. 0-0 Qxc5+ 10. Kh1 0-0 11. Qe2 Rfc8 12. e5 dxe5 13. fxe5 Nd5 14. e6 Nxc3 15. bxc3 Nf6 16. exf7+ Kxf7 17. Ng5+ Ke8 18. Qe6 Qc4 19. Qe1 Rc6 20. Ba3 Bf8 21. Rf3 Rd8 22. Qf2 h6 23. Nh3 Kf7 24. Re1 Re6 25. Rfe3 Rxe3 26. Qxe3 Rd7 27. Bc5 Rc7 28. Bd4 Rc6 29. Nf4 Qxa2 30. Nd3 Re6 31. Ne5+ Kg7 32. Qd3 Rd6 33. Qxg6+ 1-0

[Event "Vienna op-C 14th"]
[Site "Vienna"]
[Date "2003.08.??"]
[Round "?"]
[White "Wang, Kung Hao"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "B07"]
[PlyCount "111"]
[EventDate "2003.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 d6 2. f4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Bc4 c5 6. d3 Nc6 7. h3 a6 8. a3 b5 9. Ba2 Bb7 10. 0-0 e6 11. Re1 0-0 12. Rb1 Qc7 13. Bd2 Rae8 14. Ne2 Nd7 15. Bc3 Qb6 16. Bxg7 Kxg7 17. Kh2 Qc7 18. Qd2 Qa5 19. Qc3+ Qxc3 20. Nxc3 Rb8 21. g4 Ne7 22. Kg3 Rfe8 23. Nh4 Bc6 24. f5 exf5 25. exf5 gxf5 26. Rxe7 Rxe7 27. Nxf5+ Kf8 28. Nxe7 Kxe7 29. Rf1 f6 30. Bd5 Rc8 31. Bxc6 Rxc6 32. Nd5+ Ke6 33. c4 bxc4 34. dxc4 Rc8 35. Re1+ Ne5 36. b3 a5 37. Re3 Rg8 38. a4 f5 39. Kh4 fxg4 40. Rg3 Nf3+ 41. Kh5 Rg5+ 42. Kh6 Rg6+ 43. Kxh7 Kf7 44. h4 Nxh4 45. Nf4 Rg7+ 46. Kh8 Ng6+ 47. Nxg6 Rxg6 48. Kh7 Kf6 49. Rg1 Kg5 50. Rxg4+ Kxg4 51. Kxg6 Kf4 52. Kf6 Ke4 53. Ke6 Kd4 54. Kxd6 Kc3 55. Kxc5 Kxb3 56. Kb5 1-0

[Event "Vienna op-B 13th"]
[Site "Vienna"]
[Date "1998.??.??"]
[Round "?"]
[White "Hach, Otto"]
[Black "Lettner, Jochen"]
[Result "0-1"]
[ECO "A10"]
[PlyCount "44"]
[EventDate "1998.10.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. Nf3 e6 2. e3 f5 3. b3 Nf6 4. Bb2 Be7 5. c4 c5 6. Nc3 0-0 7. Be2 Nc6 8. 0-0 e5 9. Nd5 d6 10. Nxe7+ Nxe7 11. d4 cxd4 12. exd4 e4 13. Nd2 d5 14. c5 Nc6 15. Re1 Ne8 16. Nf1 Nc7 17. Ne3 f4 18. Ng4 Qg5 19. Kh1 f3 20. gxf3 Bxg4 21. fxg4 Rxf2 22. Rg1 Qe3 0-1

[Event "Vienna op-B 13th"]
[Site "Vienna"]
[Date "1998.??.??"]
[Round "?"]
[White "Hach, Otto"]
[Black "Miskic, Zeljko"]
[Result "1-0"]
[ECO "D10"]
[PlyCount "151"]
[EventDate "1998.10.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 e6 5. e3 Nf6 6. Bd3 Nc6 7. a3 a6 8. Nf3 Bd6 9. b4 0-0 10. 0-0 Bd7 11. Bb2 Rc8 12. Qd2 Re8 13. Rac1 Qe7 14. Rfd1 b5 15. Qe1 Nh5 16. Be2 f5 17. Ne5 Bxe5 18. dxe5 Qg5 19. f4 Qh6 20. Qh4 g6 21. Nb1 Rf8 22. Nd2 Be8 23. Nf3 Qg7 24. Ng5 Qe7 25. Nf3 Qxh4 26. Nxh4 Ng7 27. Nf3 Bd7 28. Rc5 Ne7 29. Rdc1 Rxc5 30. Rxc5 Rc8 31. Nd4 Rxc5 32. bxc5 Nc6 33. Nxc6 Bxc6 34. Bc3 Kf7 35. Kf2 Ke7 36. Ke1 d4 37. Bxd4 Bxg2 38. Kd2 Kd7 39. Kc3 Ne8 40. Kb4 Nc7 41. Ka5 Kc6 42. Bd1 Bd5 43. Be2 h6 44. Kb4 Be4 45. Ka5 Kb7 46. h4 h5 47. Kb4 Nd5+ 48. Ka5 Ne7 49. Kb4 Nc6+ 50. Kc3 Ne7 51. Kb4 Bd5 52. Bd1 Nc6+ 53. Kc3 a5 54. Kb2 Nb8 55. Bc3 a4 56. Bd4 Kc6 57. Kc3 Na6 58. Be2 Be4 59. Bf1 Nxc5 60. Kb4 Nd3+ 61. Bxd3 Bxd3 62. Kc3 Kd5 63. Kxd3 Kc6 64. Bc3 Kd5 65. Bb4 Kc6 66. Kd4 Kb6 67. Be7 Kc6 68. Kc3 Kd5 69. Kb4 Ke4 70. Bc5 Kf3 71. Kxb5 Kg4 72. Be7 Kf3 73. Kxa4 Kxe3 74. Bg5 Kd4 75. Kb5 Kd5 76. a4 1-0

[Event "Vienna op-B 13th"]
[Site "Vienna"]
[Date "1998.??.??"]
[Round "?"]
[White "Hochmeister, Johann"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "A03"]
[PlyCount "33"]
[EventDate "1998.10.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. f4 d5 2. Nf3 Nf6 3. b3 e6 4. Bb2 Nc6 5. e3 Bd6 6. Be2 Qe7 7. a3 0-0 8. d4 Qe8 9. c4 b6 10. Nc3 Bb7 11. Ne5 Be7 12. 0-0 Qd8 13. Qc2 Re8 14. Rac1 Rc8 15. Bf3 Na5 16. b4 Nxc4 17. Nxc4 1-0

[Event "Vienna op-B 13th"]
[Site "Vienna"]
[Date "1998.??.??"]
[Round "?"]
[White "Rongitsch, Thomas"]
[Black "Hach, Otto"]
[Result "1/2-1/2"]
[ECO "B17"]
[PlyCount "118"]
[EventDate "1998.10.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Ng5 Ngf6 6. Bc4 Nd5 7. Qe2 N7f6 8. N1f3 Bg4 9. Bd2 Bxf3 10. Nxf3 e6 11. 0-0 Be7 12. c3 0-0 13. Rfe1 Qd6 14. Ng5 Rae8 15. Ne4 Nxe4 16. Qxe4 Nf6 17. Qf3 Bd8 18. Bf4 Qd7 19. Bd3 Qd5 20. Qh3 Qh5 21. Qxh5 Nxh5 22. Be5 Be7 23. h3 Nf6 24. Rad1 Rc8 25. Re2 Rfd8 26. Bh2 Bd6 27. Be5 Bxe5 28. dxe5 Nd5 29. Red2 g6 30. Bf1 Re8 31. c4 Nb6 32. b3 Kf8 33. a4 a5 34. f4 Ke7 35. Rd6 Rcd8 36. c5 Nd5 37. g3 Rd7 38. Kf2 Red8 39. Bg2 Nc7 40. R1d4 Ne8 41. Rxd7+ Rxd7 42. Ke3 Nc7 43. Rd6 Na6 44. Kd4 Nb4 45. Be4 Nd5 46. Bd3 Nb4 47. g4 Nd5 48. f5 Nf4 49. fxg6 fxg6 50. h4 Nd5 51. h5 gxh5 52. gxh5 h6 53. Be2 Nc7 54. Bg4 Rd8 55. Rxd8 Kxd8 56. Kc4 Ke7 57. b4 axb4 58. Kxb4 Na6+ 59. Kc4 Kd7 1/2-1/2

[Event "Geneve op"]
[Site "Geneve"]
[Date "1995.??.??"]
[Round "3"]
[White "Emmott, Steven Newman"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "B12"]
[PlyCount "119"]
[EventDate "1995.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. c4 dxe4 4. Nc3 Nf6 5. Bg5 Bg4 6. Be2 Bxe2 7. Ngxe2 Nbd7 8. 0-0 e6 9. Nxe4 Be7 10. N4c3 0-0 11. Qb3 Qb6 12. Qc2 Rfe8 13. c5 Qd8 14. b4 Nd5 15. Bxe7 Qxe7 16. Rab1 N7f6 17. Rfe1 Qd7 18. Ng3 Re7 19. Nce4 h6 20. Nd6 Ne8 21. Nxe8 Raxe8 22. Ne4 Rd8 23. Nd6 Nc7 24. Nxb7 Rb8 25. Nd6 Nb5 26. Nxb5 Rxb5 27. a4 Rb8 28. Qc3 Rd8 29. Rbd1 e5 30. d5 cxd5 31. c6 Qc7 32. b5 Re6 33. Qc5 d4 34. a5 Qxa5 35. Ra1 Qb6 36. Qc4 a5 37. Rac1 Rc8 38. Qd5 Rd8 39. Qc4 Qc7 40. Qc5 Rc8 41. Qa3 Qb6 42. Rc5 Kh7 43. Rec1 Rc7 44. Qd3+ g6 45. Rd5 Ree7 46. Rd8 Rxc6 47. bxc6 Qxd8 48. Qb5 d3 49. Qb2 e4 50. Qf6 Qc7 51. Qxe7 d2 52. Qc5 Qd6 53. Qc2 dxc1Q+ 54. Qxc1 Qc7 55. Qc2 f5 56. Qc4 Kh8 57. Qd5 Qf4 58. Qd4+ Kg8 59. Qc4+ Kh7 60. c7 1-0

[Event "Geneve op"]
[Site "Geneve"]
[Date "1995.??.??"]
[Round "7"]
[White "Florin, Robert"]
[Black "Hach, Otto"]
[Result "0-1"]
[ECO "B10"]
[PlyCount "82"]
[EventDate "1995.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c6 2. c4 d5 3. cxd5 cxd5 4. exd5 Nf6 5. Bb5+ Bd7 6. Bc4 Qc7 7. Qe2 b5 8. Bb3 Qxc1+ 9. Qd1 Qxd1+ 10. Kxd1 Ne4 11. Ke1 g6 12. Nc3 Nd6 13. Rb1 Bg7 14. Nge2 0-0 15. d4 a5 16. f3 Bf5 17. Rc1 a4 18. Bd1 Na6 19. g4 Bd7 20. h4 Nb4 21. Kf1 h6 22. Kg2 Rfc8 23. Kg3 Rc7 24. a3 Na6 25. Bc2 Rac8 26. Rhd1 Nc4 27. Rb1 Ne3 28. Rd2 Nxc2 29. Rxc2 b4 30. axb4 Nxb4 31. Rd2 Rc4 32. Ra1 Bf8 33. Kf2 Rb8 34. Ke1 Kh7 35. Kd1 h5 36. g5 Bg7 37. Nxa4 Nxd5 38. Nac3 Nxc3+ 39. bxc3 Bc6 40. f4 Bf3 41. Rc1 Rbc8 0-1

[Event "Geneve op"]
[Site "Geneve"]
[Date "1995.??.??"]
[Round "4"]
[White "Hach, Otto"]
[Black "Canali, Robert"]
[Result "1-0"]
[ECO "E07"]
[PlyCount "71"]
[EventDate "1995.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 c6 5. cxd5 exd5 6. Nf3 Be7 7. 0-0 Nbd7 8. Nc3 0-0 9. a4 Ne4 10. Qc2 f5 11. Ne1 Ndf6 12. f3 Nxc3 13. bxc3 Kh8 14. Nd3 Nh5 15. Bd2 Bd6 16. f4 Nf6 17. Ne5 Ne4 18. Be3 Qe8 19. Bf3 b6 20. a5 bxa5 21. Rxa5 Bxe5 22. dxe5 a6 23. Rb1 h5 24. c4 Qd8 25. Bb6 Qe8 26. cxd5 cxd5 27. Rxd5 Be6 28. Ra5 Rc8 29. Qb2 g5 30. Bxe4 fxe4 31. fxg5 Qf7 32. Be3 Bh3 33. Bf4 Qe6 34. Qa2 Qg4 35. Rxa6 Kg7 36. Rb7+ 1-0

[Event "Geneve op"]
[Site "Geneve"]
[Date "1995.??.??"]
[Round "8"]
[White "Hach, Otto"]
[Black "Doessegger, Pascal"]
[Result "1/2-1/2"]
[ECO "D94"]
[PlyCount "22"]
[EventDate "1995.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 d5 4. Nc3 Bg7 5. e3 Bg4 6. h3 Bxf3 7. Qxf3 e6 8. Bd3 0-0 9. 0-0 Nc6 10. Qd1 dxc4 11. Bxc4 Nd5 1/2-1/2

[Event "Geneve op"]
[Site "Geneve"]
[Date "1995.??.??"]
[Round "9"]
[White "Hach, Otto"]
[Black "Lavanchy, Marc Henri"]
[Result "0-1"]
[ECO "D02"]
[PlyCount "94"]
[EventDate "1995.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. g3 Nbd7 4. Bg2 e6 5. 0-0 c5 6. c3 Be7 7. Bg5 0-0 8. Nbd2 h6 9. Bxf6 Nxf6 10. Ne5 Qb6 11. Qb3 Qc7 12. Rac1 Bd6 13. f4 c4 14. Qd1 Qb6 15. Ra1 Bxe5 16. fxe5 Ng4 17. Qe1 Nxe5 18. Qf2 Ng6 19. h4 Bd7 20. Nf3 f6 21. h5 Ne7 22. Bh3 Qd6 23. Kg2 e5 24. Bxd7 Qxd7 25. Nh4 Qg4 26. Qf3 Qxf3+ 27. Rxf3 exd4 28. cxd4 Nc6 29. Nf5 Rfe8 30. e3 Re6 31. Rf4 Ne7 32. Kf2 Re8 33. Re1 b5 34. Nxe7+ R8xe7 35. Rf5 Rd6 36. Ke2 Kf7 37. Kd2 b4 38. Re2 Re4 39. Re1 Ke6 40. Rf3 Kd7 41. Rf5 Ke6 42. Rf3 a5 43. Ref1 a4 44. Rc1 Rb6 45. Rc2 Kd6 46. Rf1 Rg4 47. Rf3 Rg5 0-1

[Event "Geneve op"]
[Site "Geneve"]
[Date "1995.??.??"]
[Round "1"]
[White "Hach, Otto"]
[Black "Paleologu, Vladimir"]
[Result "0-1"]
[ECO "A80"]
[PlyCount "74"]
[EventDate "1995.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 f5 2. e3 e6 3. Bd3 Nf6 4. Nd2 b6 5. Ngf3 Bb7 6. Nf1 Ne4 7. c3 Nc6 8. Bxe4 fxe4 9. N3d2 d5 10. Ng3 Bd6 11. f4 g6 12. Qg4 Qf6 13. h4 0-0-0 14. Nb3 a5 15. a4 Ba6 16. Nd2 Rdf8 17. b3 Qe7 18. Bb2 Kb7 19. 0-0-0 Ka7 20. Kb1 Rb8 21. Ka2 b5 22. axb5 Bxb5 23. h5 Rhg8 24. hxg6 Rxg6 25. Qh3 Rbg8 26. Ndf1 Qg7 27. Nh5 Qh6 28. Nfg3 Qf8 29. Bc1 a4 30. b4 Bc4+ 31. Ka1 Kb6 32. Ba3 Na7 33. Kb2 Nb5 34. Rd2 Qe8 35. Rf2 Qc6 36. Rc1 Bd3 37. Ne2 Qc4 0-1

[Event "Geneve op"]
[Site "Geneve"]
[Date "1995.??.??"]
[Round "6"]
[White "Hach, Otto"]
[Black "Ruiz, J."]
[Result "0-1"]
[ECO "D05"]
[BlackElo "2250"]
[PlyCount "58"]
[EventDate "1995.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. e3 b6 3. Bd3 Bb7 4. Nf3 e6 5. Nbd2 d5 6. Nf1 Bd6 7. Ng3 Nbd7 8. c3 0-0 9. 0-0 c5 10. Bd2 Ne4 11. Ne2 f5 12. g3 Rc8 13. h4 Qe7 14. Kg2 Rf6 15. Nf4 e5 16. Nh3 Nxd2 17. Nxd2 e4 18. Be2 Rcf8 19. Nf4 Rh6 20. Qb3 Nf6 21. Rh1 Bxf4 22. exf4 e3 23. fxe3 Qxe3 24. Qd1 cxd4 25. Nf1 Qe7 26. cxd4 Re8 27. Bf3 Ne4 28. Qd3 Qb4 29. Rh2 Qxb2+ 0-1

[Event "Geneve op"]
[Site "Geneve"]
[Date "1995.??.??"]
[Round "2"]
[White "Niegemeier, Karl Leo"]
[Black "Hach, Otto"]
[Result "0-1"]
[ECO "A13"]
[PlyCount "38"]
[EventDate "1995.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 e6 2. a3 d5 3. cxd5 exd5 4. d4 Be7 5. Nc3 Nf6 6. Nf3 c6 7. Bg5 h6 8. Bh4 Nbd7 9. e3 Nb6 10. h3 Bf5 11. Nd2 0-0 12. f3 Bg6 13. e4 dxe4 14. Ndxe4 Nxe4 15. Bxe7 Qxe7 16. Nxe4 Bxe4 17. fxe4 Qxe4+ 18. Kf2 Rfe8 19. Bd3 Qxd4+ 0-1

[Event "Biel op-B"]
[Site "Biel"]
[Date "1993.??.??"]
[Round "3"]
[White "Hach, Otto"]
[Black "Elling, Volker"]
[Result "0-1"]
[ECO "C01"]
[PlyCount "70"]
[EventDate "1993.07.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bd3 Nf6 5. Ne2 Bd6 6. h3 0-0 7. Bg5 h6 8. Bh4 b6 9. Nd2 c5 10. c3 Nc6 11. Rc1 Qe7 12. 0-0 Re8 13. Re1 g5 14. Bb5 Bd7 15. Bxc6 Bxc6 16. Bg3 Qd7 17. Bxd6 Qxd6 18. Qc2 Ne4 19. Nxe4 dxe4 20. dxc5 bxc5 21. Rcd1 Qe5 22. Ng3 Re6 23. Nf1 f5 24. Rd2 f4 25. Qd1 Kg7 26. Qg4 Kg6 27. Qd1 Rae8 28. Rd8 Qf6 29. Rxe8 Rxe8 30. g3 e3 31. fxe3 f3 32. Kf2 Qe6 33. Nd2 Qxh3 34. Nxf3 Rf8 35. Qd6+ Rf6 0-1

[Event "Switzerland op"]
[Site "Switzerland"]
[Date "1992.??.??"]
[Round "?"]
[White "Hach, Otto"]
[Black "Van Boltaringen, Erwin"]
[Result "1-0"]
[ECO "C41"]
[PlyCount "47"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 d6 5. Nc3 Bd7 6. Be3 Nf6 7. Be2 a6 8. 0-0 Be7 9. a4 0-0 10. Re1 Nxd4 11. Bxd4 Bc6 12. Bf3 Re8 13. e5 Bxf3 14. Qxf3 dxe5 15. Bxe5 c6 16. Ne4 Nxe4 17. Rxe4 Bf8 18. Rd1 Qe7 19. Rde1 Qg5 20. h3 f5 21. Qb3+ Kh8 22. Bxg7+ Kxg7 23. Rxe8 Rxe8 24. Rxe8 1-0

[Event "Switzerland op"]
[Site "Switzerland"]
[Date "1992.??.??"]
[Round "?"]
[White "Leib, Agripa"]
[Black "Hach, Otto"]
[Result "1-0"]
[ECO "B17"]
[PlyCount "79"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ndf6 6. Ng3 Bg4 7. Be3 e6 8. Bd3 Qd5 9. c4 Bxf3 10. gxf3 Qa5+ 11. Ke2 Bd6 12. Qd2 Qxd2+ 13. Kxd2 g6 14. a3 h5 15. Ne4 Be7 16. Ke2 Nd7 17. Bf4 Nh6 18. Nd6+ Bxd6 19. Bxd6 0-0-0 20. Rhd1 Nf5 21. Bxf5 exf5 22. c5 Rde8+ 23. Kd3 Re6 24. b4 Rhe8 25. a4 Re2 26. Rd2 Rxd2+ 27. Kxd2 b6 28. b5 Kb7 29. Rc1 bxc5 30. dxc5 Ne5 31. Rc3 Nd7 32. a5 Ne5 33. a6+ Kc8 34. b6 axb6 35. Bxe5 Rxe5 36. cxb6 Ra5 37. Rxc6+ Kb8 38. b7 Ka7 39. Rc8 Rb5 40. Ra8+ 1-0

