[Event "Sachsen-ch"]
[Site "Leipzig"]
[Date "2018.11.04"]
[Round "6"]
[White "Petersohn, Sadko"]
[Black "Haufe, Laurin"]
[Result "0-1"]
[ECO "A57"]
[WhiteElo "1825"]
[BlackElo "1934"]
[PlyCount "94"]
[EventDate "2018.11.02"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "GER"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. d5 d6 4. c4 b5 5. cxb5 a6 6. bxa6 g6 7. Nc3 Bg7 8. e4 Bxa6 9. Bd2 0-0 10. Bxa6 Nxa6 11. a3 Qb6 12. Rb1 Rfb8 13. 0-0 Nc7 14. Qe2 Nd7 15. Ra1 Nb5 16. Rfb1 Nxc3 17. Bxc3 Bxc3 18. bxc3 Qxb1+ 19. Rxb1 Rxb1+ 20. Ne1 Rxa3 21. f4 Raa1 22. Kf2 Rxe1 23. Qb5 Nf8 24. e5 dxe5 25. fxe5 Rxe5 26. Qxc5 Ra2+ 27. Kf3 Rae2 28. c4 e6 29. Qc7 exd5 30. cxd5 R5e3+ 31. Kf4 Rd3 32. Qc4 Red2 33. Ke4 Rd4+ 34. Qxd4 Rxd4+ 35. Kxd4 Nd7 36. g4 Kf8 37. d6 f6 38. h4 Kf7 39. Kd5 f5 40. g5 f4 41. Ke4 Ke6 42. Kxf4 Kxd6 43. Kg4 Ke5 44. h5 Ke4 45. hxg6 hxg6 46. Kg3 Kf5 47. Kh4 Ne5 0-1

[Event "Sachsen-ch"]
[Site "Leipzig"]
[Date "2018.11.04"]
[Round "5"]
[White "Rudolph, Juergen"]
[Black "Petersohn, Sadko"]
[Result "0-1"]
[ECO "A13"]
[WhiteElo "1703"]
[BlackElo "1825"]
[PlyCount "74"]
[EventDate "2018.11.02"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "GER"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. b3 Nf6 2. c4 e6 3. Bb2 d5 4. cxd5 exd5 5. Nf3 c5 6. e3 Nc6 7. Bb5 Be7 8. 0-0 0-0 9. d4 a6 10. Be2 cxd4 11. Nxd4 Be6 12. Nd2 Rc8 13. N2f3 Ne4 14. Rc1 Qa5 15. Nxc6 bxc6 16. Qc2 Ba3 17. Bxa3 Qxa3 18. Bd3 f5 19. Nd4 Bd7 20. f3 Nd6 21. Qc5 Qxc5 22. Rxc5 Nb7 23. Rc3 c5 24. Bxa6 cxd4 25. Rxc8 Bxc8 26. exd4 Nd6 27. Bd3 f4 28. Rc1 Bf5 29. Bxf5 Nxf5 30. b4 Ra8 31. b5 Rxa2 32. b6 Rb2 33. Rc8+ Kf7 34. Rc7+ Ke6 35. b7 Kd6 36. Rf7 Ke6 37. Rc7 Ne7 0-1

[Event "Sachsen-ch"]
[Site "Leipzig"]
[Date "2018.11.03"]
[Round "3"]
[White "Metzner, Nikolaus"]
[Black "Petersohn, Sadko"]
[Result "1/2-1/2"]
[ECO "C01"]
[WhiteElo "1567"]
[BlackElo "1825"]
[PlyCount "47"]
[EventDate "2018.11.02"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "GER"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Nf6 5. Nc3 Be7 6. Bd3 0-0 7. 0-0 c5 8. Bd2 c4 9. Be2 Nc6 10. Re1 Ne4 11. b3 Nxc3 12. Bxc3 b5 13. a4 b4 14. Bd2 c3 15. Bf4 Bf6 16. Bb5 Bd7 17. Qd3 Qb6 18. Bd6 Rfe8 19. Bc5 Qb8 20. Re2 Rxe2 21. Qxe2 a5 22. Re1 Qc7 23. Qe3 h6 24. Qd3 1/2-1/2

[Event "Sachsen-ch"]
[Site "Leipzig"]
[Date "2018.11.03"]
[Round "2"]
[White "Petersohn, Sadko"]
[Black "Oswald, Hannah"]
[Result "0-1"]
[ECO "E05"]
[WhiteElo "1825"]
[BlackElo "1582"]
[PlyCount "120"]
[EventDate "2018.11.02"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "GER"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. g3 e6 5. Bg2 Be7 6. 0-0 0-0 7. Ne5 Nbd7 8. Nxc4 c5 9. dxc5 Nxc5 10. Nc3 a6 11. Bf4 Ra7 12. b4 b5 13. Na5 Rd7 14. Qc2 Nb7 15. Bc6 Nxa5 16. Bxd7 Bxb4 17. Bxc8 Qxc8 18. Rac1 Ba3 19. Nd5 Qd8 20. Nxf6+ Qxf6 21. Rcd1 Nc4 22. Rd7 Bc5 23. a4 Bb6 24. axb5 axb5 25. Rb7 e5 26. Bc1 Qc6 27. Rxb6 Qxb6 28. Bb2 Rd8 29. Bc3 h6 30. e3 Rc8 31. Bxe5 Qe6 32. Bc3 Nxe3 33. fxe3 Qxe3+ 34. Qf2 Qxf2+ 35. Kxf2 Rxc3 36. Rb1 Rc2+ 37. Ke3 Rxh2 38. Rxb5 Kh7 39. Kf4 Rf2+ 40. Ke3 Rf6 41. Ke4 Kg6 42. Ra5 Re6+ 43. Kf4 h5 44. Ra7 Rf6+ 45. Ke4 Rf5 46. Ra8 Kg5 47. Rh8 Kg4 48. Ra8 Rf3 49. Ra5 Rxg3 50. Ra7 Rf3 51. Ra1 h4 52. Rg1+ Rg3 53. Rf1 f6 54. Rf4+ Kh3 55. Kf5 Rg5+ 56. Ke6 Rg4 57. Rf5 Kg2 58. Ra5 Rf4 59. Kf7 h3 60. Kxg7 h2 0-1

[Event "Sachsen-ch"]
[Site "Leipzig"]
[Date "2018.11.03"]
[Round "4"]
[White "Petersohn, Sadko"]
[Black "Wolter, Uwe"]
[Result "1-0"]
[ECO "E16"]
[WhiteElo "1825"]
[BlackElo "1519"]
[PlyCount "22"]
[EventDate "2018.11.02"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "GER"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 b6 4. g3 Bb7 5. Bg2 d5 6. b3 Nbd7 7. 0-0 Be7 8. Nc3 0-0 9. Bf4 c5 10. dxc5 Nxc5 11. cxd5 Nxd5 1-0

[Event "Sachsen-ch"]
[Site "Leipzig"]
[Date "2018.11.02"]
[Round "1"]
[White "Fischer, Edwin"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "D55"]
[WhiteElo "2155"]
[BlackElo "1825"]
[PlyCount "39"]
[EventDate "2018.11.02"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "GER"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 e6 3. c4 Nf6 4. Bg5 Be7 5. Nc3 b6 6. e3 0-0 7. Rc1 dxc4 8. Bxc4 Ba6 9. Bxa6 Nxa6 10. 0-0 c5 11. Qe2 Nc7 12. Bxf6 gxf6 13. dxc5 Bxc5 14. Rfd1 Qc8 15. b4 Bxb4 16. Nb5 Bc5 17. Nd6 Qa6 18. Qb2 Ba3 19. Qxf6 Bxc1 20. Rd4 1-0

[Event "Leipzig VfB op 25th"]
[Site "Leipzig"]
[Date "2018.03.25"]
[Round "9"]
[White "Petersohn, Sadko"]
[Black "Wecke, Thoralf"]
[Result "0-1"]
[ECO "A41"]
[WhiteElo "1819"]
[BlackElo "1929"]
[PlyCount "132"]
[EventDate "2018.03.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 183 Extra"]
[Source "ChessBase"]
[SourceDate "2018.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2018.04.19"]
[SourceQuality "1"]

1. d4 d6 2. c4 e5 3. dxe5 dxe5 4. Qxd8+ Kxd8 5. g3 Na6 6. a3 Nc5 7. Nd2 a5 8. Bg2 c6 9. Ngf3 f6 10. 0-0 Be6 11. Rd1 Kc7 12. Ne1 Nh6 13. Nd3 Nxd3 14. exd3 Rd8 15. Bf1 a4 16. Be2 Nf5 17. Nf3 Bc5 18. g4 Nd4 19. Nxd4 Bxd4 20. Rb1 g6 21. Be3 h5 22. gxh5 gxh5 23. b3 Rhg8+ 24. Kh1 Bh3 25. Rg1 Rxg1+ 26. Rxg1 axb3 27. Rb1 Rg8 28. Bf3 h4 29. Rxb3 Bf1 30. Bxd4 exd4 31. c5 h3 32. Rb1 Bxd3 33. Rd1 Re8 34. Bg4 Be2 35. Bxe2 Rxe2 36. Kg1 Rc2 37. Kf1 Rxc5 38. Rxd4 Rc1+ 39. Ke2 Rh1 40. Kf3 Rxh2 41. Kg3 Rg2+ 42. Kf3 Rg5 43. Rh4 Ra5 44. a4 h2 45. Kg2 Rg5+ 46. Kxh2 Rd5 47. Kg3 c5 48. Rh6 Rd6 49. Kf3 b5 50. axb5 Kb6 51. Ke3 Kxb5 52. Rh8 Kb4 53. Rf8 c4 54. f4 c3 55. f5 c2 56. Rb8+ Kc5 57. Rc8+ Rc6 58. Rxc6+ Kxc6 59. Kd2 Kd5 60. Kxc2 Ke4 61. Kd2 Kxf5 62. Ke1 Kg4 63. Ke2 Kg3 64. Kf1 Kf3 65. Ke1 f5 66. Kf1 f4 0-1

[Event "Leipzig VfB op 25th"]
[Site "Leipzig"]
[Date "2018.03.24"]
[Round "8"]
[White "Petersohn, Sadko"]
[Black "Guendel, Bernd"]
[Result "0-1"]
[ECO "E07"]
[WhiteElo "1819"]
[BlackElo "2069"]
[PlyCount "68"]
[EventDate "2018.03.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 183 Extra"]
[Source "ChessBase"]
[SourceDate "2018.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2018.04.19"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 Be7 5. Bg2 0-0 6. 0-0 Nbd7 7. Nc3 c6 8. cxd5 exd5 9. Bf4 Re8 10. Qb3 Nf8 11. Ne5 Ne6 12. Rad1 Nxf4 13. gxf4 Nh5 14. Nxd5 Be6 15. Nxe7+ Qxe7 16. Qf3 Nf6 17. a3 Bd5 18. Qd3 Bxg2 19. Kxg2 Nd5 20. e3 Rad8 21. b4 Rd6 22. Rg1 Rh6 23. Kh1 Rh3 24. Rg4 f6 25. Nc4 Qd7 26. Rdg1 Re7 27. Qf1 Rh5 28. e4 Nc3 29. e5 f5 30. R4g3 Ne4 31. Rf3 Qxd4 32. Ne3 Nd2 33. Nxf5 Nxf1 34. Rxg7+ Rxg7 0-1

[Event "Leipzig VfB op 25th"]
[Site "Leipzig"]
[Date "2018.03.24"]
[Round "7"]
[White "Stumbries, Lars"]
[Black "Petersohn, Sadko"]
[Result "0-1"]
[ECO "C10"]
[WhiteElo "1959"]
[BlackElo "1819"]
[PlyCount "81"]
[EventDate "2018.03.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 183 Extra"]
[Source "ChessBase"]
[SourceDate "2018.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2018.04.19"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Nc6 5. Nf3 dxe4 6. Nxe4 Be7 7. Bxf6 gxf6 8. Qd2 b6 9. 0-0-0 Bb7 10. Bc4 Na5 11. Bb5+ c6 12. Bd3 f5 13. Ng3 Qd5 14. Kb1 0-0-0 15. Qe2 Qd7 16. Ne5 Qe8 17. Ba6 f6 18. Nf3 Bd6 19. Rhe1 Bxg3 20. hxg3 Bxa6 21. Qxa6+ Kb8 22. Rd3 Qe7 23. Rde3 Rd6 24. b4 Nb7 25. Qc4 Re8 26. c3 Nd8 27. a4 Qf7 28. Nh4 Rd5 29. Nf3 e5 30. Qa2 e4 31. Nh4 a5 32. Qb2 axb4 33. Qxb4 Qa7 34. R1e2 Qa5 35. Rb2 Qxb4 36. Rxb4 Kc7 37. Nf3 Nf7 38. Kc2 Ra8 39. Ng1 Rda5 40. Kb3 Nd6 41. Kc2 0-1

[Event "Leipzig VfB op 25th"]
[Site "Leipzig"]
[Date "2018.03.23"]
[Round "6"]
[White "Petersohn, Sadko"]
[Black "Paulini, Stefan"]
[Result "1-0"]
[ECO "A96"]
[WhiteElo "1819"]
[BlackElo "1709"]
[PlyCount "107"]
[EventDate "2018.03.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 183 Extra"]
[Source "ChessBase"]
[SourceDate "2018.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2018.04.19"]
[SourceQuality "1"]

1. d4 e6 2. Nf3 f5 3. c4 Nf6 4. g3 Be7 5. Bg2 0-0 6. 0-0 d6 7. Nc3 Ne4 8. Qc2 Nxc3 9. bxc3 Bf6 10. Rd1 Qe8 11. Ba3 Rf7 12. c5 Rd7 13. Rab1 e5 14. cxd6 e4 15. dxc7 Rxc7 16. Ne1 Nc6 17. e3 b6 18. Bf1 Bd7 19. Bc4+ Kh8 20. Bd6 Rcc8 21. Ba6 Na5 22. Rb4 Rc6 23. Be5 Be7 24. Rbb1 Re6 25. Qb2 Ba4 26. Bb5 Bxb5 27. Qxb5 Qc8 28. Rbc1 Nc4 29. Bf4 Ba3 30. Rb1 Rc6 31. Qb3 Be7 32. Rbc1 Qe6 33. d5 Na5 34. dxe6 Nxb3 35. axb3 Rxe6 36. h4 h6 37. Rd5 g5 38. Be5+ Kg8 39. Rcd1 gxh4 40. gxh4 Bxh4 41. Ng2 Be7 42. c4 Kh7 43. Nf4 Rc6 44. Rd7 Rg8+ 45. Kf1 Re8 46. Rxa7 Kg8 47. Rdd7 Bf8 48. Bg7 Rec8 49. Bxf8 Kxf8 50. Rf7+ Kg8 51. Rxf5 Rd6 52. Nd5 Kh8 53. Rff7 Kg8 54. Ne7+ 1-0

[Event "Leipzig VfB op 25th"]
[Site "Leipzig"]
[Date "2018.03.22"]
[Round "4"]
[White "Petersohn, Sadko"]
[Black "Ehrich, Dieter"]
[Result "1-0"]
[ECO "E90"]
[WhiteElo "1819"]
[BlackElo "1620"]
[PlyCount "79"]
[EventDate "2018.03.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 183 Extra"]
[Source "ChessBase"]
[SourceDate "2018.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2018.04.19"]
[SourceQuality "1"]

1. d4 c5 2. d5 d6 3. c4 Nf6 4. Nf3 g6 5. Nc3 Bg7 6. e4 Nbd7 7. Bd3 0-0 8. 0-0 Ng4 9. Bf4 Nge5 10. Be2 Nxf3+ 11. Bxf3 Ne5 12. Be2 a6 13. Qd2 Bd7 14. Bh6 Ng4 15. Bxg7 Kxg7 16. h3 Nf6 17. f4 b5 18. e5 Ng8 19. cxb5 axb5 20. Bxb5 Nh6 21. Bxd7 Qxd7 22. g4 f5 23. g5 Ng8 24. e6 Qb7 25. Ne2 h6 26. h4 Rfb8 27. b3 Ra7 28. Rf2 Rba8 29. Nc3 Qb4 30. Na4 Qb5 31. Qc3+ Kh7 32. h5 c4 33. hxg6+ Kxg6 34. gxh6 Nxh6 35. Rg2+ Ng4 36. Qc2 Kf6 37. Rxg4 fxg4 38. Qh7 Qe8 39. Nb6 Rd8 40. bxc4 1-0

[Event "Leipzig VfB op 25th"]
[Site "Leipzig"]
[Date "2018.03.22"]
[Round "5"]
[White "Schmid, Eugen"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "D14"]
[WhiteElo "1984"]
[BlackElo "1819"]
[PlyCount "103"]
[EventDate "2018.03.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 183 Extra"]
[Source "ChessBase"]
[SourceDate "2018.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2018.04.19"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 Bf5 5. cxd5 cxd5 6. Qb3 Qb6 7. Qxb6 axb6 8. Bf4 e6 9. e3 Bb4 10. Bb5+ Nc6 11. 0-0 0-0 12. Rfc1 Na5 13. Bc7 Bxc3 14. Rxc3 Ne4 15. Rcc1 Rfc8 16. b3 Nc6 17. Bxb6 Nb4 18. Bd7 Rc2 19. Rxc2 Nxc2 20. Rc1 Rxa2 21. Ne1 Nc3 22. Kf1 Nxe1 23. Rxc3 Rc2 24. Rc8+ Rxc8 25. Bxc8 Nc2 26. Bxb7 Bd3+ 27. Kg1 Be4 28. Bc5 Ne1 29. f3 Bd3 30. Bc6 Nc2 31. Kf2 f5 32. h3 Kf7 33. g4 Kf6 34. Bd7 g6 35. Bd6 fxg4 36. hxg4 h5 37. gxh5 gxh5 38. Bc6 h4 39. b4 Na3 40. e4 dxe4 41. fxe4 Nc2 42. Be5+ Kg5 43. b5 Nb4 44. Ke3 Bc4 45. Bd7 h3 46. b6 Nc2+ 47. Kf2 Ba6 48. Bxe6 h2 49. Kg2 Ne1+ 50. Kxh2 Nf3+ 51. Kg3 Ne1 52. Bd5 1-0

[Event "Leipzig VfB op 25th"]
[Site "Leipzig"]
[Date "2018.03.21"]
[Round "2"]
[White "Petersohn, Sadko"]
[Black "Ortlepp, Konstanze"]
[Result "1/2-1/2"]
[ECO "E05"]
[WhiteElo "1819"]
[BlackElo "1588"]
[PlyCount "58"]
[EventDate "2018.03.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 183 Extra"]
[Source "ChessBase"]
[SourceDate "2018.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2018.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. g3 Be7 5. Bg2 0-0 6. 0-0 dxc4 7. Ne5 Nbd7 8. Nxc4 Nb6 9. b3 c5 10. Ba3 Nxc4 11. bxc4 cxd4 12. Bxe7 Qxe7 13. Nd2 e5 14. Rb1 Rb8 15. Qc2 Be6 16. Rfc1 Qd7 17. c5 Bd5 18. f3 Rfc8 19. h4 Qc6 20. Nb3 b6 21. g4 h6 22. Qf5 Qe6 23. Qxe6 Bxe6 24. cxb6 Rxc1+ 25. Nxc1 Rxb6 26. Rxb6 axb6 27. Nd3 Nd7 28. a3 f6 29. Kf2 Kf7 1/2-1/2

[Event "Leipzig VfB op 25th"]
[Site "Leipzig"]
[Date "2018.03.21"]
[Round "3"]
[White "Witter, Jannes"]
[Black "Petersohn, Sadko"]
[Result "1/2-1/2"]
[ECO "C05"]
[WhiteElo "1727"]
[BlackElo "1819"]
[PlyCount "112"]
[EventDate "2018.03.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 183 Extra"]
[Source "ChessBase"]
[SourceDate "2018.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2018.04.19"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. f4 c5 6. c3 Nc6 7. Ndf3 Be7 8. Bd3 cxd4 9. cxd4 Qb6 10. Ne2 a5 11. 0-0 f6 12. Kh1 f5 13. a3 Nf8 14. Bc2 Bd7 15. Rb1 Qa7 16. Ba4 Nb8 17. Bc2 b5 18. Qe1 Na6 19. Qxa5 b4 20. axb4 Bxb4 21. Qa2 Bb5 22. Ba4 Qd7 23. Bxb5 Qxb5 24. b3 Nd7 25. Ng3 0-0 26. Qe2 Nc7 27. Be3 Qxe2 28. Nxe2 Ra2 29. Nc1 Rc2 30. Rf2 Rc6 31. Nd3 Bc3 32. Rc2 Nb5 33. Rbc1 Rfc8 34. Bd2 Nb8 35. Bxc3 Nxc3 36. Nb4 R6c7 37. Na2 Nb5 38. Rxc7 Rxc7 39. Rxc7 Nxc7 40. Nb4 h6 41. h3 Kf7 42. Kg1 Ke7 43. Kf2 Kd7 44. g4 fxg4 45. hxg4 Ke7 46. f5 Nb5 47. Kg3 Nc3 48. Kh4 Ne2 49. Nd3 Nc6 50. Kh5 exf5 51. gxf5 Ncxd4 52. Nxd4 Nxd4 53. Kg6 Kf8 54. f6 gxf6 55. exf6 Nxb3 56. Ne5 Nc5 1/2-1/2

[Event "Leipzig VfB op 25th"]
[Site "Leipzig"]
[Date "2018.03.20"]
[Round "1"]
[White "Just, Wolfgang"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "C11"]
[WhiteElo "2133"]
[BlackElo "1819"]
[PlyCount "45"]
[EventDate "2018.03.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 183 Extra"]
[Source "ChessBase"]
[SourceDate "2018.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2018.04.19"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Bd3 cxd4 8. Ne2 Qb6 9. 0-0 Nc5 10. Nexd4 Nxd3 11. Qxd3 Bc5 12. c3 a5 13. Be3 Bd7 14. Rae1 Nxd4 15. Nxd4 Rc8 16. b3 Bxd4 17. Bxd4 Bb5 18. Qg3 Qa6 19. Qxg7 Rf8 20. Rf3 Kd7 21. b4 b6 22. f5 exf5 23. Rxf5 1-0

[Event "Leipzig VfB op 24th"]
[Site "Leipzig"]
[Date "2017.03.25"]
[Round "9"]
[White "Damm, Holger"]
[Black "Petersohn, Sadko"]
[Result "0-1"]
[ECO "C11"]
[WhiteElo "1765"]
[BlackElo "1708"]
[PlyCount "84"]
[EventDate "2017.03.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Nf3 b6 6. Be2 Ba6 7. 0-0 Bxe2 8. Qxe2 Be7 9. Be3 c5 10. Rad1 Nc6 11. Qd2 cxd4 12. Bxd4 0-0 13. Ne2 Qc7 14. Qe3 Rac8 15. Rfe1 Nb4 16. Qf4 Nxc2 17. Rc1 Qb7 18. Red1 Nxd4 19. Nexd4 Rc5 20. Qg4 Kh8 21. Qf4 Rxc1 22. Rxc1 Rc8 23. Rd1 Kg8 24. Qg4 Nf8 25. h3 Bc5 26. Ne2 Ng6 27. h4 Qa6 28. Nc3 h6 29. Re1 Qc4 30. Qg3 Bb4 31. h5 Nf8 32. Rc1 Bxc3 33. Rxc3 Qa6 34. Ra3 Rc1+ 35. Kh2 Qf1 36. Kh3 Rc2 37. Rxa7 Qxf2 38. Qg4 Rxb2 39. Nh4 Qe3+ 40. Nf3 Qe4 41. Nd4 Qxg4+ 42. Kxg4 Rb4 0-1

[Event "Leipzig VfB op 24th"]
[Site "Leipzig"]
[Date "2017.03.25"]
[Round "7"]
[White "Herfurth, Thomas"]
[Black "Petersohn, Sadko"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1850"]
[BlackElo "1708"]
[PlyCount "90"]
[EventDate "2017.03.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[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 Bd7 5. Nf3 Qb6 6. Be2 Bb5 7. 0-0 Nc6 8. Be3 Bxe2 9. Qxe2 cxd4 10. cxd4 Nge7 11. Rd1 Nf5 12. g4 Nxe3 13. fxe3 Rc8 14. Nc3 Be7 15. Rac1 0-0 16. g5 a6 17. h4 Rc7 18. Nh2 Rfc8 19. Ng4 Na7 20. Rc2 Nb5 21. Rdc1 Nxc3 22. Rxc3 Rxc3 23. Rxc3 Rxc3 24. bxc3 Qb1+ 25. Kg2 Ba3 26. Nf2 Qb2 27. Qxb2 Bxb2 28. Nd1 Ba3 29. Kf3 f5 30. h5 Kf7 31. Ke2 Be7 32. Kd3 b5 33. Nf2 Bxg5 34. Nh3 Be7 35. Nf4 g6 36. hxg6+ hxg6 37. Ke2 g5 38. Nd3 Kg6 39. Kf2 a5 40. Nc1 Ba3 41. Nb3 a4 42. Na5 Bb2 43. Nc6 Bxc3 44. Nd8 b4 45. Nxe6 b3 0-1

[Event "Leipzig VfB op 24th"]
[Site "Leipzig"]
[Date "2017.03.25"]
[Round "8"]
[White "Petersohn, Sadko"]
[Black "Just, Joachim"]
[Result "0-1"]
[ECO "D78"]
[WhiteElo "1708"]
[BlackElo "1941"]
[PlyCount "84"]
[EventDate "2017.03.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 g6 2. Nf3 Bg7 3. c4 c6 4. g3 d5 5. Bg2 Nf6 6. 0-0 0-0 7. b3 Bf5 8. Nh4 Be6 9. Bb2 dxc4 10. bxc4 Bxc4 11. Qc2 Ba6 12. Rd1 Nd5 13. e4 Nb6 14. d5 cxd5 15. Bxg7 Kxg7 16. exd5 N8d7 17. d6 e5 18. Nd2 Rc8 19. Qb3 Nc5 20. Qa3 Qd7 21. Nhf3 Rfe8 22. Rac1 Nd3 23. Rxc8 Rxc8 24. Ne4 Qa4 25. Qxa4 Nxa4 26. Bf1 Nab2 27. Rb1 Rd8 28. Nxe5 f5 29. Nxd3 Nxd3 30. Bxd3 fxe4 31. Bxe4 Rxd6 32. Bxb7 Bc4 33. Bf3 Ra6 34. Bd1 Rxa2 35. Bb3 Bxb3 36. Rxb3 a5 37. Rb7+ Kg8 38. h4 a4 39. Ra7 a3 40. f4 Ra1+ 41. Kf2 a2 42. Kf3 Rf1+ 0-1

[Event "Leipzig VfB op 24th"]
[Site "Leipzig"]
[Date "2017.03.24"]
[Round "6"]
[White "Petersohn, Sadko"]
[Black "Didt, Hartmut"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "1708"]
[BlackElo "1801"]
[PlyCount "41"]
[EventDate "2017.03.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 c6 4. g3 Bf5 5. Bg2 e6 6. 0-0 Be7 7. Nc3 0-0 8. Nh4 Bg6 9. Nxg6 hxg6 10. b3 Nbd7 11. e4 dxe4 12. Nxe4 Nxe4 13. Bxe4 Nf6 14. Bg2 Qc7 15. Qc2 Rad8 16. Rd1 Qb8 17. Bg5 Rfe8 18. Rd3 Nh7 19. Be3 Nf6 20. Rad1 b6 21. Bxc6 1-0

[Event "Leipzig VfB op 24th"]
[Site "Leipzig"]
[Date "2017.03.23"]
[Round "5"]
[White "Naumann, Peter"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "A84"]
[WhiteElo "1812"]
[BlackElo "1708"]
[PlyCount "43"]
[EventDate "2017.03.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 e6 4. cxd5 exd5 5. Nf3 Bd6 6. e3 f5 7. Bd3 Nf6 8. Qc2 Ne4 9. Ne5 Nd7 10. f4 Qh4+ 11. g3 Nxg3 12. Qf2 Bxe5 13. dxe5 Nc5 14. Bc2 d4 15. exd4 Ne6 16. Qxg3 Qxg3+ 17. hxg3 Nxd4 18. Bd1 b6 19. Be3 c5 20. Bxd4 cxd4 21. Nb5 Bb7 22. Nd6+ 1-0

[Event "Leipzig VfB op 24th"]
[Site "Leipzig"]
[Date "2017.03.23"]
[Round "4"]
[White "Petersohn, Sadko"]
[Black "Artmann, Juergen"]
[Result "0-1"]
[ECO "A88"]
[WhiteElo "1708"]
[BlackElo "1974"]
[PlyCount "86"]
[EventDate "2017.03.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 f5 2. c4 Nf6 3. Nf3 g6 4. g3 Bg7 5. Bg2 d6 6. 0-0 0-0 7. b3 c6 8. Bb2 a5 9. Nc3 Ne4 10. Qc2 d5 11. Ne5 e6 12. f3 Nxc3 13. Bxc3 Nd7 14. f4 Nf6 15. c5 Ne4 16. Rab1 Nxc3 17. Qxc3 Bd7 18. b4 a4 19. Rb2 Be8 20. e3 g5 21. Bf3 h5 22. Be2 h4 23. b5 Bxe5 24. dxe5 Kg7 25. bxc6 Bxc6 26. Bb5 hxg3 27. hxg3 Rh8 28. Bxc6 bxc6 29. Rb7+ Kg6 30. g4 Rh4 31. gxf5+ exf5 32. e6 d4 33. Qxd4 Rg4+ 34. Kf2 Rxf4+ 35. Qxf4 Qd2+ 36. Kf3 gxf4 37. Rg1+ Kf6 38. Rgg7 Qxe3+ 39. Kg2 f3+ 40. Kf1 Rh8 41. Rbf7+ Ke5 42. Rh7 Qe2+ 43. Kg1 Qg2# 0-1

[Event "Leipzig VfB op 24th"]
[Site "Leipzig"]
[Date "2017.03.22"]
[Round "2"]
[White "Pietzsch, Manuel"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "C11"]
[WhiteElo "2080"]
[BlackElo "1708"]
[PlyCount "51"]
[EventDate "2017.03.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 b6 7. a4 Ba6 8. Bb5 Bxb5 9. axb5 cxd4 10. Nxd4 Qh4+ 11. g3 Qh3 12. Be3 Bb4 13. Nde2 Nc5 14. Qd4 a5 15. 0-0-0 Nbd7 16. g4 0-0 17. Rdg1 Qf3 18. Rf1 Qxg4 19. Rhg1 Qh4 20. Rg2 Qe7 21. f5 g6 22. Bg5 f6 23. exf6 Nxf6 24. fxg6 Bxc3 25. Nxc3 e5 26. Qh4 1-0

[Event "Leipzig VfB op 24th"]
[Site "Leipzig"]
[Date "2017.03.22"]
[Round "3"]
[White "Stieler, Sebastian"]
[Black "Petersohn, Sadko"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1832"]
[BlackElo "1708"]
[PlyCount "108"]
[EventDate "2017.03.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[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 Qb6 5. Bd3 Bd7 6. Bc2 Ne7 7. Nf3 cxd4 8. cxd4 Bb5 9. Nc3 Nbc6 10. Nxb5 Qxb5 11. Qd3 Qb6 12. 0-0 Nb4 13. Ba4+ Nec6 14. Qb3 Be7 15. a3 Na6 16. Qxb6 axb6 17. Be3 Nc7 18. Bc2 0-0 19. Rac1 Rfc8 20. Rfd1 Na5 21. Bd3 b5 22. Bg5 Bxg5 23. Nxg5 h6 24. Nf3 Kf8 25. Rc3 Ke7 26. Rdc1 Kd7 27. Nd2 Nc4 28. Bxc4 bxc4 29. Rg3 Nb5 30. Rxg7 Nxd4 31. Kf1 Ke7 32. Rh7 Rh8 33. Rxh8 Rxh8 34. b3 b5 35. bxc4 bxc4 36. Nxc4 dxc4 37. Rxc4 Nb3 38. Rc7+ Kf8 39. Rc8+ Kg7 40. Rxh8 Kxh8 41. a4 Kg7 42. Ke2 Kg6 43. f4 Kf5 44. Kf3 h5 45. h3 h4 46. g4+ hxg3 47. Kxg3 Nd4 48. a5 Ne2+ 49. Kf3 Nxf4 50. a6 Nd5 51. a7 Nb6 52. h4 Kxe5 53. Kg4 Kf6 54. Kh5 e5 0-1

[Event "Leipzig VfB op 24th"]
[Site "Leipzig"]
[Date "2017.03.21"]
[Round "1"]
[White "Petersohn, Sadko"]
[Black "Speck, Stefan"]
[Result "1/2-1/2"]
[ECO "A43"]
[WhiteElo "1708"]
[BlackElo "2018"]
[PlyCount "116"]
[EventDate "2017.03.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 c5 2. d5 e6 3. e4 exd5 4. exd5 d6 5. Nf3 Ne7 6. c4 Ng6 7. Bd3 Be7 8. 0-0 0-0 9. Nc3 Na6 10. a3 Nc7 11. Re1 Rb8 12. Qc2 a6 13. b3 b5 14. Bb2 Bd7 15. Ne4 bxc4 16. bxc4 Nf4 17. Re3 Bf5 18. Rae1 Nxd3 19. Rxd3 Ne8 20. Ba1 Bg6 21. Rb3 Rxb3 22. Qxb3 Nf6 23. Ng3 Ng4 24. h3 Nh6 25. Qb7 Bf6 26. Bxf6 Qxf6 27. Qxa6 Nf5 28. Ne4 Qd8 29. g4 Nh4 30. Nxh4 Qxh4 31. Qxd6 h5 32. Qg3 Qe7 33. f3 hxg4 34. hxg4 f5 35. gxf5 Bxf5 36. Ng5 Qf6 37. Ne6 Re8 38. Kg2 Bxe6 39. Rxe6 Rxe6 40. Qb8+ Kh7 41. Qh2+ Kg8 42. dxe6 Qxe6 43. Qb8+ Kh7 44. Qb1+ Kh8 45. Qe4 Qb6 46. Kg3 Kg8 47. Kg4 Qa7 48. Kg5 Qxa3 49. Qe6+ Kh7 50. Qg6+ Kg8 51. Qe6+ Kh7 52. Qg6+ Kg8 53. Qe8+ Kh7 54. Qh5+ Kg8 55. f4 Qe3 56. Qg6 Qg3+ 57. Kf5 Qd3+ 58. Kg5 Qg3+ 1/2-1/2

[Event "Leipzig VfB op 23rd"]
[Site "Leipzig"]
[Date "2016.03.20"]
[Round "9"]
[White "Ziese, Gerhard"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "D32"]
[WhiteElo "1982"]
[BlackElo "1668"]
[PlyCount "49"]
[EventDate "2016.03.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nf3 Nf6 4. e3 c5 5. cxd5 exd5 6. Bd3 Nc6 7. Nc3 Bg4 8. Be2 Be7 9. 0-0 0-0 10. dxc5 Bxc5 11. Nd4 Bxe2 12. Ncxe2 Re8 13. b3 Rc8 14. Bb2 Nd7 15. Rc1 Nxd4 16. Nxd4 Nf8 17. Qd2 Ne6 18. Rfd1 Qb6 19. Nf5 Red8 20. h3 Bb4 21. Qd3 Rc6 22. Qe2 Rdc8 23. Rxc6 bxc6 24. Qg4 Bf8 25. Nh6+ 1-0

[Event "Leipzig VfB op 23rd"]
[Site "Leipzig"]
[Date "2016.03.19"]
[Round "8"]
[White "Petersohn, Sadko"]
[Black "Ellemann, Stefan"]
[Result "1/2-1/2"]
[ECO "A86"]
[WhiteElo "1668"]
[BlackElo "1985"]
[PlyCount "74"]
[EventDate "2016.03.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. c4 0-0 6. Nc3 d6 7. Bg5 Nbd7 8. d5 Nc5 9. Qc1 e5 10. dxe6 Bxe6 11. Nd4 Re8 12. b4 Nce4 13. Nxe4 fxe4 14. Bxe4 Bh3 15. Bxb7 c5 16. Bd5+ Kh8 17. Nc6 Qc8 18. Bxf6 Bxf6 19. Rb1 cxb4 20. Rxb4 Qa6 21. Qc2 Qa3 22. Ra4 Qc5 23. Rg1 Bg4 24. e3 Rxe3+ 25. fxe3 Qxe3+ 26. Kf1 Bh3+ 27. Bg2 Bd4 28. Nxd4 Rf8+ 29. Nf5 Bxf5 30. Qb2+ Kg8 31. Bd5+ Be6+ 32. Kg2 Bxd5+ 33. cxd5 Qf3+ 34. Kh3 Qh5+ 35. Kg2 Qf3+ 36. Kh3 Qh5+ 37. Kg2 Qf3+ 1/2-1/2

[Event "Leipzig VfB op 23rd"]
[Site "Leipzig"]
[Date "2016.03.19"]
[Round "7"]
[White "Zaerban, Jan Christopher"]
[Black "Petersohn, Sadko"]
[Result "0-1"]
[ECO "D41"]
[WhiteElo "1895"]
[BlackElo "1668"]
[PlyCount "62"]
[EventDate "2016.03.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 b6 7. Nf3 Be7 8. Bd3 0-0 9. 0-0 c5 10. Bb2 Ba6 11. Bxa6 Nxa6 12. Qe2 Nc7 13. Rfd1 Qc8 14. a4 Qa6 15. Qe3 Rfd8 16. Ne5 f6 17. Nc6 Rd7 18. Nxe7+ Rxe7 19. dxc5 e5 20. Rd6 Re6 21. Rxe6 Nxe6 22. cxb6 axb6 23. Ba3 Rd8 24. Bb4 Rd3 25. Qe2 Nf4 26. Qf1 Qc4 27. g3 Ne2+ 28. Qxe2 Rxg3+ 29. hxg3 Qxe2 30. a5 bxa5 31. Rxa5 Qxe4 0-1

[Event "Leipzig VfB op 23rd"]
[Site "Leipzig"]
[Date "2016.03.18"]
[Round "6"]
[White "Petersohn, Sadko"]
[Black "Vorreiter, Heiko"]
[Result "1-0"]
[ECO "E01"]
[WhiteElo "1668"]
[BlackElo "1759"]
[PlyCount "57"]
[EventDate "2016.03.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 c5 5. cxd5 exd5 6. Bg2 Be6 7. 0-0 Be7 8. dxc5 Bxc5 9. Nc3 h6 10. Qc2 Qe7 11. Rd1 0-0 12. a3 Rd8 13. b4 Bb6 14. Bb2 Nc6 15. e3 Rac8 16. Rac1 a6 17. Qb1 Rd7 18. Ne2 Rcd8 19. Nfd4 Nxd4 20. Nxd4 Bg4 21. Rd2 Bh5 22. Nf5 Qe6 23. Bh3 Bg4 24. Bxg4 Nxg4 25. Bxg7 d4 26. Bxd4 Bxd4 27. Rxd4 Rxd4 28. Nxd4 Nxe3 29. Nxe6 1-0

[Event "Leipzig VfB op 23rd"]
[Site "Leipzig"]
[Date "2016.03.17"]
[Round "4"]
[White "Rudolph, Juergen"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "B40"]
[WhiteElo "1780"]
[BlackElo "1668"]
[PlyCount "75"]
[EventDate "2016.03.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. b3 e6 2. e4 d5 3. exd5 exd5 4. Bb2 Nf6 5. Nf3 c5 6. Be2 Be7 7. 0-0 0-0 8. d4 b6 9. c4 Bb7 10. dxc5 Bxc5 11. Nc3 d4 12. Nd5 Nxd5 13. cxd5 Qxd5 14. Bxd4 Bxd4 15. Qxd4 Re8 16. Bc4 Qxd4 17. Nxd4 Nd7 18. Nb5 Re5 19. Rad1 Rg5 20. g3 Ne5 21. f4 Nxc4 22. fxg5 Ne3 23. Rd7 Bc6 24. Rxa7 Nxf1 25. Rxa8+ Bxa8 26. Kxf1 Kf8 27. Kf2 Ke7 28. Ke3 Bc6 29. Nd4 Bd7 30. Ke4 g6 31. Ke5 Bg4 32. Nb5 Bf5 33. Nc3 Kd7 34. Nd5 Kc6 35. Ne7+ Kc5 36. Nxf5 gxf5 37. a3 b5 38. h3 1-0

[Event "Leipzig VfB op 23rd"]
[Site "Leipzig"]
[Date "2016.03.16"]
[Round "2"]
[White "Petersohn, Sadko"]
[Black "Kuehnl, Bernd"]
[Result "1-0"]
[ECO "E67"]
[WhiteElo "1668"]
[BlackElo "1841"]
[PlyCount "59"]
[EventDate "2016.03.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 d6 5. Bg2 0-0 6. 0-0 Nbd7 7. Nc3 Rb8 8. e4 e5 9. Bg5 h6 10. dxe5 dxe5 11. Be3 b6 12. Qa4 a5 13. Rfd1 Qe7 14. Nd5 Nxd5 15. Rxd5 Nc5 16. Bxc5 bxc5 17. Qxa5 Bb7 18. Qxc5 Qe6 19. Rd2 Bxe4 20. Re1 f5 21. Nh4 Bxg2 22. Nxg2 Kh7 23. b3 f4 24. gxf4 Qg4 25. fxe5 Rbd8 26. Rxd8 Rxd8 27. Qxc7 Rd1 28. Qa5 Rd3 29. e6 Bc3 30. Qxc3 1-0

[Event "Leipzig VfB op 23rd"]
[Site "Leipzig"]
[Date "2016.03.15"]
[Round "1"]
[White "Ehrlich, Kay"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "C06"]
[WhiteElo "2027"]
[BlackElo "1668"]
[PlyCount "31"]
[EventDate "2016.03.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 b6 7. Qe2 a5 8. Ngf3 Ba6 9. 0-0 Bxd3 10. Qxd3 Nc6 11. Rd1 cxd4 12. Nxd4 Ncxe5 13. Qb5 Qf6 14. f4 Qxf4 15. Nc4 Qxc1 16. Nxe5 1-0

[Event "Leipzig VfB op 21st"]
[Site "Leipzig"]
[Date "2014.03.08"]
[Round "8"]
[White "Caprita, Victor"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "D60"]
[WhiteElo "1617"]
[BlackElo "1585"]
[PlyCount "89"]
[EventDate "2014.03.04"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 159 Extra"]
[Source "ChessBase"]
[SourceDate "2014.04.24"]
[SourceVersion "1"]
[SourceVersionDate "2014.04.24"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Nf3 Nbd7 7. Bd3 dxc4 8. Bxc4 Nb6 9. Bd3 Nfd5 10. Bxe7 Nxc3 11. bxc3 Qxe7 12. Qc2 g6 13. 0-0 Nd5 14. Qd2 b6 15. e4 Nf6 16. Qh6 Ng4 17. Qf4 f5 18. exf5 exf5 19. Bc4+ Kh8 20. Rfe1 Qd6 21. Ne5 Nxe5 22. Qxe5+ Qxe5 23. dxe5 Re8 24. f4 Be6 25. Bxe6 Rxe6 26. Rad1 Re7 27. Rd4 Rae8 28. Red1 Kg7 29. Rd7 Kf7 30. Kf2 Rxd7 31. Rxd7+ Re7 32. Rxe7+ Kxe7 33. Ke3 c5 34. a4 Ke6 35. c4 a5 36. h3 Ke7 37. g4 Ke6 38. Kf3 h6 39. Kg3 g5 40. Kf3 gxf4 41. Kxf4 fxg4 42. hxg4 Kf7 43. Kf5 Ke7 44. e6 Kf8 45. Kf6 1-0

[Event "Leipzig VfB op 21st"]
[Site "Leipzig"]
[Date "2014.03.08"]
[Round "9"]
[White "Nuelken, Michael"]
[Black "Petersohn, Sadko"]
[Result "1/2-1/2"]
[ECO "B14"]
[WhiteElo "1531"]
[BlackElo "1585"]
[PlyCount "80"]
[EventDate "2014.03.04"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 159 Extra"]
[Source "ChessBase"]
[SourceDate "2014.04.24"]
[SourceVersion "1"]
[SourceVersionDate "2014.04.24"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nc3 Nf6 4. e3 c5 5. Nf3 cxd4 6. exd4 Nc6 7. cxd5 exd5 8. Be2 a6 9. 0-0 Bd6 10. Bg5 Be6 11. a3 h6 12. Bh4 g5 13. Bg3 Qc7 14. Qe1 0-0-0 15. b4 Bxg3 16. fxg3 Ng4 17. Qd2 Nf6 18. b5 Ne4 19. Nxe4 dxe4 20. bxc6 exf3 21. cxb7+ Kxb7 22. Bxf3+ Bd5 23. Rfc1 Qd6 24. Qb2+ Ka7 25. Bxd5 Qxd5 26. Kh1 Rb8 27. Qf2 Rhd8 28. Qf1 Rb7 29. Rd1 Rb2 30. Rac1 Re8 31. Rc5 Qb7 32. Rdc1 Kb8 33. Re5 Rc8 34. Rxc8+ Qxc8 35. Rc5 Qb7 36. Rc1 Qd5 37. Rd1 Ra2 38. Rb1+ Ka7 39. Ra1 Rd2 40. Rd1 Ra2 1/2-1/2

[Event "Leipzig VfB op 21st"]
[Site "Leipzig"]
[Date "2014.03.08"]
[Round "7"]
[White "Petersohn, Sadko"]
[Black "Weimert, Miriam"]
[Result "0-1"]
[ECO "A52"]
[WhiteElo "1585"]
[BlackElo "1385"]
[PlyCount "102"]
[EventDate "2014.03.04"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 159 Extra"]
[Source "ChessBase"]
[SourceDate "2014.04.24"]
[SourceVersion "1"]
[SourceVersionDate "2014.04.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3 Bc5 5. e3 Nc6 6. g3 Ngxe5 7. Nbd2 d6 8. a3 a5 9. Qc2 Bg4 10. Bg2 h6 11. 0-0 0-0 12. b3 Re8 13. Bb2 Qd7 14. Nxe5 Nxe5 15. Bxb7 Rab8 16. Bg2 Bh3 17. Qc3 Bxg2 18. Kxg2 f6 19. Rad1 Qc6+ 20. Kg1 Nf3+ 21. Nxf3 Qxf3 22. Rfe1 h5 23. Rd2 h4 24. e4 Qxc3 25. Bxc3 hxg3 26. hxg3 Rxb3 27. Bxa5 Rxg3+ 28. Kf1 Rxa3 29. Bxc7 Bb4 30. Bxd6 Bxd2 31. Bxa3 Bxe1 32. Kxe1 Rxe4+ 33. Kd2 Rxc4 34. Kd3 Rh4 35. Bc5 Kf7 36. Ke3 Ke6 37. Kf3 Kf5 38. Kg3 Rc4 39. Bd6 g5 40. Kf3 Rc3+ 41. Kg2 g4 42. Be7 Rf3 43. Bd8 Ke4 44. Bc7 f5 45. Kg1 f4 46. Kg2 Kd3 47. Bd8 Ke2 48. Bh4 Rh3 49. Bg5 g3 50. fxg3 Rxg3+ 51. Kh2 Rxg5 0-1

[Event "Leipzig VfB op 21st"]
[Site "Leipzig"]
[Date "2014.03.07"]
[Round "6"]
[White "Schomann, Michael"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "D53"]
[WhiteElo "1726"]
[BlackElo "1585"]
[PlyCount "63"]
[EventDate "2014.03.04"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 159 Extra"]
[Source "ChessBase"]
[SourceDate "2014.04.24"]
[SourceVersion "1"]
[SourceVersionDate "2014.04.24"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Nf3 b6 7. cxd5 Nxd5 8. Nxd5 exd5 9. Bxe7 Qxe7 10. a3 Nd7 11. Rc1 Nb8 12. Qc2 c6 13. Bd3 f5 14. Ne5 c5 15. b3 Na6 16. Qb2 f4 17. 0-0 fxe3 18. fxe3 Nc7 19. Rxf8+ Qxf8 20. Rf1 Qd6 21. Qc2 Qh6 22. Bxh7+ Qxh7 23. Rf8+ Kxf8 24. Qxh7 Be6 25. Qh8+ Ke7 26. Qxg7+ Kd6 27. Nd3 c4 28. bxc4 dxc4 29. Qe5+ Kd7 30. Nf4 c3 31. d5 c2 32. dxe6+ 1-0

[Event "Leipzig VfB op 21st"]
[Site "Leipzig"]
[Date "2014.03.06"]
[Round "4"]
[White "Holz auf der Heide, Gerhard"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "1834"]
[BlackElo "1585"]
[PlyCount "29"]
[EventDate "2014.03.04"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 159 Extra"]
[Source "ChessBase"]
[SourceDate "2014.04.24"]
[SourceVersion "1"]
[SourceVersionDate "2014.04.24"]
[SourceQuality "1"]

1. b4 e6 2. Bb2 Nf6 3. a3 d5 4. e3 c5 5. b5 Be7 6. c4 0-0 7. Nf3 a6 8. a4 axb5 9. axb5 Rxa1 10. Bxa1 Qd6 11. Be5 Qb6 12. Bxb8 dxc4 13. Bxc4 Bd7 14. Be5 Bxb5 15. Qb3 1-0

[Event "Leipzig VfB op 21st"]
[Site "Leipzig"]
[Date "2014.03.06"]
[Round "5"]
[White "Petersohn, Sadko"]
[Black "Kuehnl, Bernd"]
[Result "1/2-1/2"]
[ECO "E60"]
[WhiteElo "1585"]
[BlackElo "1848"]
[PlyCount "119"]
[EventDate "2014.03.04"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 159 Extra"]
[Source "ChessBase"]
[SourceDate "2014.04.24"]
[SourceVersion "1"]
[SourceVersionDate "2014.04.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d6 3. Nf3 g6 4. g3 Bg7 5. Bg2 0-0 6. 0-0 c6 7. Nbd2 Qc7 8. e4 Bg4 9. Qc2 Nbd7 10. b3 c5 11. Bb2 Bxf3 12. Nxf3 cxd4 13. Nxd4 a6 14. f4 Rac8 15. Rac1 Ng4 16. Rfe1 Qb6 17. Qd1 e5 18. Qxg4 exd4 19. Kh1 Nc5 20. Rcd1 Na4 21. Ba1 Nc3 22. Bxc3 dxc3 23. Re2 Rfe8 24. Rc1 Rc7 25. Qf3 Rce7 26. Qe3 Qc7 27. Rd1 b5 28. Qd3 bxc4 29. Qxd6 cxb3 30. Qxc7 Rxc7 31. axb3 Rb8 32. Rb1 Rcb7 33. e5 Rxb3 34. Rxb3 Rxb3 35. Bd5 Rb5 36. Ba2 Kf8 37. Rc2 Rc5 38. Kg2 Ke7 39. Kf3 g5 40. Ke4 f6 41. Kd4 Ra5 42. Kxc3 fxe5 43. fxg5 e4+ 44. Kd2 Kd6 45. Ke3 Ke5 46. Bg8 Ra3+ 47. Ke2 h6 48. Rc5+ Kd6 49. Rd5+ Ke7 50. gxh6 Bxh6 51. Re5+ Kf8 52. Bc4 Rc3 53. Rxe4 Rc2+ 54. Kd3 Rxh2 55. Bxa6 Rf2 56. Kd4 Bg7+ 57. Ke3 Rf5 58. g4 Re5 59. Rxe5 Bxe5 60. Ke4 1/2-1/2

[Event "Leipzig VfB op 21st"]
[Site "Leipzig"]
[Date "2014.03.05"]
[Round "3"]
[White "Petersohn, Sadko"]
[Black "Bronn, Gottfried"]
[Result "0-1"]
[ECO "E01"]
[WhiteElo "1585"]
[BlackElo "1914"]
[PlyCount "38"]
[EventDate "2014.03.04"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 159 Extra"]
[Source "ChessBase"]
[SourceDate "2014.04.24"]
[SourceVersion "1"]
[SourceVersionDate "2014.04.24"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. g3 Nf6 4. Nd2 Bb4 5. Qc2 0-0 6. a3 Bxd2+ 7. Bxd2 Nbd7 8. Bg2 Re8 9. Nf3 e5 10. cxd5 Nxd5 11. Ng5 N7f6 12. dxe5 Rxe5 13. f4 Re7 14. Rd1 Bg4 15. Nf3 Qe8 16. Ne5 Rd8 17. Bf3 Bxf3 18. exf3 Nd7 19. Bc3 Ne3 0-1

[Event "Leipzig VfB op 21st"]
[Site "Leipzig"]
[Date "2014.03.05"]
[Round "2"]
[White "Ziersch, Hubert"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "2050"]
[BlackElo "1585"]
[PlyCount "53"]
[EventDate "2014.03.04"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 159 Extra"]
[Source "ChessBase"]
[SourceDate "2014.04.24"]
[SourceVersion "1"]
[SourceVersionDate "2014.04.24"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 cxd4 6. cxd4 h6 7. a3 Nge7 8. Nc3 a6 9. Bd3 Bd7 10. 0-0 b5 11. b4 Qb6 12. Be3 Nf5 13. Bxf5 exf5 14. Nxd5 Qb7 15. Nc3 a5 16. d5 axb4 17. dxc6 Bxc6 18. axb4 Rxa1 19. Qxa1 Bxf3 20. gxf3 Qxf3 21. Qd1 Qxd1 22. Rxd1 Bxb4 23. Nd5 Ba5 24. Ra1 Bd8 25. Ra8 0-0 26. Bc5 Re8 27. Be7 1-0

[Event "Leipzig VfB op 21st"]
[Site "Leipzig"]
[Date "2014.03.04"]
[Round "1"]
[White "Petersohn, Sadko"]
[Black "Laube, Soeren"]
[Result "1-0"]
[ECO "A90"]
[WhiteElo "1585"]
[BlackElo "1992"]
[PlyCount "113"]
[EventDate "2014.03.04"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 159 Extra"]
[Source "ChessBase"]
[SourceDate "2014.04.24"]
[SourceVersion "1"]
[SourceVersionDate "2014.04.24"]
[SourceQuality "1"]

1. d4 e6 2. c4 f5 3. g3 Nf6 4. Bg2 c6 5. Nf3 d5 6. Qc2 Bd6 7. c5 Bc7 8. 0-0 0-0 9. b3 b6 10. Bb2 Ba6 11. Re1 bxc5 12. dxc5 Nbd7 13. b4 Rb8 14. a3 Ne4 15. Nc3 Ndf6 16. Nxe4 fxe4 17. Ne5 Bxe5 18. Bxe5 Rb7 19. Bh3 Qd7 20. f3 Qf7 21. Bxf6 Qxf6 22. fxe4 Rbf7 23. exd5 Qd4+ 24. e3 Qxd5 25. Rad1 Qe5 26. Rd6 Rf6 27. Rxc6 Rf2 28. Bxe6+ Kh8 29. Qxf2 Rxf2 30. Kxf2 Bb7 31. Rd6 Qb2+ 32. Re2 Qf6+ 33. Ke1 Qa1+ 34. Rd1 Qc3+ 35. Kf1 h5 36. Rd8+ Kh7 37. Bf5+ Kh6 38. Rd6+ Kg5 39. Bd3 Kg4 40. Rd4+ Kg5 41. Rd6 Kg4 42. Kf2 Qe5 43. Rd4+ Kg5 44. Ke1 Bf3 45. h4+ Kf6 46. Rf4+ Ke7 47. Rxf3 Qc3+ 48. Rd2 Qxa3 49. Rf4 Qa1+ 50. Rd1 Qc3+ 51. Ke2 Qb2+ 52. Rd2 Qc1 53. Rf1 Qc3 54. Rc2 Qxb4 55. c6 Qg4+ 56. Kf2 Kd8 57. c7+ 1-0

[Event "Cologne Longerich op-B 12th"]
[Site "Cologne"]
[Date "2013.07.22"]
[Round "5"]
[White "Gail, Edgar"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "C65"]
[WhiteElo "1554"]
[BlackElo "1078"]
[PlyCount "53"]
[EventDate "2013.07.19"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Nf6 5. Qe2 0-0 6. 0-0 d5 7. exd5 Qxd5 8. Rd1 Bxf2+ 9. Kxf2 Ng4+ 10. Kg1 Qc5+ 11. d4 exd4 12. Nxd4 Bd7 13. Bxc6 Rfe8 14. Qf3 Qe5 15. g3 bxc6 16. Bf4 Qh5 17. h4 Re7 18. Nd2 Rae8 19. b4 g5 20. Bxg5 Re5 21. Bf4 Rd5 22. N2b3 c5 23. Nxc5 Rxd4 24. Rxd4 Qf5 25. Rxd7 Qc2 26. Qxg4+ Kh8 27. Bh6 1-0

[Event "Cologne Longerich op-B 12th"]
[Site "Cologne"]
[Date "2013.07.22"]
[Round "4"]
[White "Petersohn, Sadko"]
[Black "Rokitta, Norbert"]
[Result "0-1"]
[ECO "D08"]
[WhiteElo "1078"]
[BlackElo "1583"]
[PlyCount "112"]
[EventDate "2013.07.19"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 e5 3. g3 dxc4 4. d5 Nf6 5. Bg2 Bd6 6. Qa4+ Nbd7 7. Nd2 0-0 8. Qxc4 Nb6 9. Qd3 Nfd7 10. Ngf3 f5 11. e4 Nc5 12. Qc2 fxe4 13. Nxe4 Bf5 14. Nh4 Bxe4 15. Bxe4 Nxe4 16. Qxe4 Bc5 17. Be3 Bxe3 18. fxe3 Nxd5 19. Rd1 c6 20. Ng2 Qa5+ 21. Rd2 Nf6 22. Qc4+ Kh8 23. b4 Qb6 24. 0-0 Nd5 25. Rxf8+ Rxf8 26. Rf2 Rxf2 27. Kxf2 Qxb4 28. Qxb4 Nxb4 29. a3 Nc2 30. a4 b5 31. axb5 cxb5 32. Ke2 b4 33. Kd3 Na3 34. Ne1 Kg8 35. Nc2 Nxc2 36. Kxc2 a5 37. Kb3 Kf7 38. e4 Ke6 39. h3 Kd6 40. Kc4 Kc6 41. g4 g5 42. Kb3 Kc5 43. Kb2 Kc4 44. Ka2 a4 45. Kb2 b3 46. Kb1 Kc3 47. Ka1 b2+ 48. Kb1 a3 49. h4 a2+ 50. Kxa2 Kc2 51. Ka3 b1Q 52. Ka4 Kc3 53. Ka5 Kc4 54. Ka6 Kc5 55. Ka7 Kc6 56. Ka8 Qb7# 0-1

[Event "Cologne Longerich op-B 12th"]
[Site "Cologne"]
[Date "2013.07.20"]
[Round "3"]
[White "Lennartz, Ludwig"]
[Black "Petersohn, Sadko"]
[Result "0-1"]
[ECO "C51"]
[WhiteElo "1512"]
[BlackElo "1078"]
[PlyCount "80"]
[EventDate "2013.07.19"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7 6. Qb3 Na5 7. Bxf7+ Kf8 8. Qb4 Kxf7 9. Qxa5 d6 10. d4 b6 11. Qa4 Bf6 12. 0-0 Ne7 13. dxe5 dxe5 14. Rd1 Qe8 15. Qc4+ Be6 16. Qe2 h6 17. Ba3 Rd8 18. Nbd2 Qa4 19. Bxe7 Kxe7 20. Nf1 Rxd1 21. Rxd1 Qxa2 22. Qd3 Qc4 23. Qc2 Rd8 24. Rxd8 Kxd8 25. Ne3 Qc6 26. c4 Qc5 27. Nd5 Qa3 28. h3 a5 29. Qd2 Bxd5 30. Qxd5+ Qd6 31. Qb5 Qd7 32. Qb3 Kc8 33. Qc3 Qd6 34. Qb3 Kb7 35. Ne1 Qb4 36. Qd1 Qxc4 37. Qg4 a4 38. f3 Qe2 39. Qe6 Qxe1+ 40. Kh2 Qc3 0-1

[Event "Cologne Longerich op-B 12th"]
[Site "Cologne"]
[Date "2013.07.20"]
[Round "2"]
[White "Petersohn, Sadko"]
[Black "Vjazner, Lilian"]
[Result "1-0"]
[ECO "A90"]
[WhiteElo "1078"]
[BlackElo "1310"]
[PlyCount "141"]
[EventDate "2013.07.19"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. d4 e6 2. c4 f5 3. Nf3 Nf6 4. g3 c6 5. Bg2 d5 6. b3 Bd6 7. 0-0 Nbd7 8. Bb2 Bc7 9. Nc3 0-0 10. Qc2 Ne8 11. Nd2 Nd6 12. Rae1 Nf6 13. f3 Qe8 14. e4 fxe4 15. fxe4 Qg6 16. Qb1 Nh5 17. Rxf8+ Kxf8 18. Rf1+ Kg8 19. exd5 Nf5 20. Ne2 Bd7 21. Qe4 Nf6 22. Qf3 exd5 23. Nf4 Bxf4 24. Qxf4 Qh6 25. Qxh6 Nxh6 26. Re1 Nf5 27. Bh3 dxc4 28. Nxc4 Re8 29. Rxe8+ Nxe8 30. Ne3 Ned6 31. Nxf5 Bxf5 32. Bxf5 Nxf5 33. Kf2 Kf7 34. Kf3 Ke6 35. Kf4 h6 36. g4 Nd6 37. d5+ cxd5 38. Bxg7 Nf7 39. h4 a6 40. g5 hxg5+ 41. hxg5 Nd6 42. g6 Nf5 43. Bh8 Ne7 44. Kg5 Ng8 45. Bd4 b5 46. Bc3 Ke7 47. Kf5 Kd6 48. g7 Ne7+ 49. Kf6 Ng8+ 50. Kf7 Nh6+ 51. Kf8 Kc5 52. Bd2 Nf5 53. g8Q Nd6 54. Qg1+ d4 55. Bc3 Nf5 56. Qg5 dxc3 57. Qxf5+ Kb4 58. Qc2 a5 59. a3+ Kxa3 60. Qxc3 a4 61. bxa4+ Kxa4 62. Qb2 b4 63. Ke7 Ka5 64. Kd6 Ka4 65. Kc5 b3 66. Kc4 Ka5 67. Qxb3 Ka6 68. Qb5+ Ka7 69. Kc5 Ka8 70. Kc6 Ka7 71. Qb7# 1-0

[Event "Cologne Longerich op-B 12th"]
[Site "Cologne"]
[Date "2013.07.19"]
[Round "1"]
[White "Pohl, Stefan"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "C01"]
[WhiteElo "1363"]
[BlackElo "1078"]
[PlyCount "115"]
[EventDate "2013.07.19"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 Nc6 2. d4 e6 3. g3 d5 4. exd5 exd5 5. Nc3 Bb4 6. Qd3 Qe7+ 7. Nge2 Bxc3+ 8. Qxc3 Qe4 9. f3 Qe7 10. Bg2 h6 11. 0-0 Nf6 12. Re1 0-0 13. Nf4 Qb4 14. Bd2 Qxd4+ 15. Kh1 Qxc3 16. Bxc3 d4 17. Bd2 Bf5 18. Nd3 Rfe8 19. Bf4 Rxe1+ 20. Rxe1 Bxd3 21. cxd3 Re8 22. Rxe8+ Nxe8 23. Kg1 Nb4 24. Bf1 Nxa2 25. Be5 c5 26. Bb8 Nf6 27. Bxa7 Nd7 28. Bh3 Ne5 29. Bxc5 Nxf3+ 30. Kf2 Ne5 31. Bxd4 Nxd3+ 32. Ke3 Ndb4 33. Bg2 Nc2+ 34. Ke4 Nxd4 35. Kxd4 b6 36. Kc4 Nc1 37. Kb5 Nd3 38. b3 Nc5 39. Bd5 Nd3 40. Kxb6 Kf8 41. Ka5 g5 42. b4 Nxb4 43. Kxb4 f5 44. Kc4 Ke7 45. Kd4 Kf6 46. Bb3 h5 47. Bc4 f4 48. gxf4 gxf4 49. Ke4 Kg5 50. Kf3 Kf5 51. h4 Ke5 52. Bd3 Kf6 53. Kxf4 Ke6 54. Kg5 Ke5 55. Bf5 Kd6 56. Kxh5 Ke7 57. Kg6 Kf8 58. Be6 1-0

[Event "Leipzig VfB op 20th"]
[Site "Leipzig"]
[Date "2013.03.09"]
[Round "8"]
[White "Petersohn, Sadko"]
[Black "Spreer, Lutz"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "1003"]
[BlackElo "1686"]
[PlyCount "42"]
[EventDate "2013.03.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. b4 e5 2. Bb2 e4 3. a3 d5 4. e3 Nf6 5. c4 c6 6. d4 Be6 7. c5 Be7 8. a4 0-0 9. b5 Bd7 10. Nc3 b6 11. Ba3 bxc5 12. Bxc5 Bxc5 13. dxc5 Qa5 14. Qd2 a6 15. bxc6 Nxc6 16. f3 Qxc5 17. fxe4 dxe4 18. Nxe4 Nxe4 19. Qxd7 Qxe3+ 20. Ne2 Rad8 21. Ra3 Qf2+ 0-1

[Event "Leipzig VfB op 20th"]
[Site "Leipzig"]
[Date "2013.03.09"]
[Round "7"]
[White "Scheller, Thomas"]
[Black "Petersohn, Sadko"]
[Result "1-0"]
[ECO "D06"]
[WhiteElo "1717"]
[BlackElo "1003"]
[PlyCount "85"]
[EventDate "2013.03.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nc6 3. e3 Nf6 4. c4 Bf5 5. a3 e6 6. Nc3 Be7 7. Bd3 Bxd3 8. Qxd3 0-0 9. Rb1 b6 10. 0-0 Bd6 11. cxd5 exd5 12. Nb5 Ne7 13. Bd2 c6 14. Nxd6 Qxd6 15. Rfc1 g6 16. Bb4 Qc7 17. Bxe7 Qxe7 18. Rxc6 Rac8 19. Rbc1 Rxc6 20. Rxc6 Ne4 21. Qc2 Ra8 22. Rc7 Qd8 23. Qc6 Rb8 24. Ne5 Nd6 25. Nd7 Rc8 26. Rxc8 Qxc8 27. Qxc8+ Nxc8 28. Nf6+ Kg7 29. Nxd5 Nd6 30. b3 f5 31. f3 Kf7 32. Kf2 g5 33. g3 Nb5 34. a4 Ke6 35. axb5 Kxd5 36. Ke2 f4 37. gxf4 gxf4 38. Kd3 fxe3 39. Kxe3 Ke6 40. Ke4 Kd6 41. f4 Ke6 42. f5+ Kd6 43. d5 1-0

[Event "Leipzig VfB op 20th"]
[Site "Leipzig"]
[Date "2013.03.08"]
[Round "6"]
[White "Petersohn, Sadko"]
[Black "Opasiak, Dustin Tennessee"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "1003"]
[BlackElo "1765"]
[PlyCount "74"]
[EventDate "2013.03.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. b4 Nf6 2. Bb2 d5 3. e3 g6 4. c4 c6 5. Qb3 Bg7 6. Bxf6 exf6 7. d4 0-0 8. g3 Re8 9. cxd5 Qxd5 10. Qxd5 cxd5 11. Ne2 Nc6 12. a3 Bg4 13. Nbc3 Bf3 14. Rg1 f5 15. Rd1 Rac8 16. Rd3 Be4 17. Nxe4 dxe4 18. Rd1 Ne7 19. Rc1 Rxc1+ 20. Nxc1 Rc8 21. Kd2 Nd5 22. Na2 a5 23. bxa5 Bf8 24. a6 bxa6 25. Bxa6 Rb8 26. Kc2 Bxa3 27. Rb1 Rxb1 28. Kxb1 Nb4 29. Nc3 Nxa6 30. Ka2 Bb4 31. Kb3 Kf8 32. Kc4 Bxc3 33. Kxc3 Ke7 34. Kc4 Kd6 35. h3 Nc7 36. g4 Nd5 37. f3 Nxe3+ 0-1

[Event "Leipzig VfB op 20th"]
[Site "Leipzig"]
[Date "2013.03.07"]
[Round "5"]
[White "Petersohn, Sadko"]
[Black "Reinsdorf, Christin"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "1003"]
[BlackElo "1869"]
[PlyCount "97"]
[EventDate "2013.03.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. b4 e5 2. a3 d5 3. Bb2 d4 4. d3 c5 5. c3 Be6 6. g3 Nc6 7. Bg2 Qd7 8. Qa4 Nd8 9. Qxd7+ Bxd7 10. Nd2 Bc6 11. Bxc6+ Nxc6 12. b5 Nce7 13. cxd4 cxd4 14. Ngf3 f6 15. 0-0 Rc8 16. Rac1 Kd7 17. Rxc8 Nxc8 18. Nc4 Nd6 19. Nxd6 Bxd6 20. a4 Ne7 21. Nd2 Rc8 22. Rc1 Rxc1+ 23. Bxc1 Nd5 24. Ne4 Nc3 25. Nxc3 dxc3 26. Kf1 Bb4 27. e3 Kd6 28. Ke2 f5 29. Kd1 Kd5 30. Kc2 a6 31. bxa6 bxa6 32. Kb3 Ba5 33. Ba3 e4 34. d4 c2 35. Kxc2 Be1 36. Kd1 Ba5 37. Bc1 Bb4 38. Bd2 Bd6 39. Kc2 Kc4 40. a5 g6 41. Be1 Ba3 42. Kd2 Bd6 43. Ke2 Kd5 44. f3 g5 45. fxe4+ fxe4 46. Kd2 Bb4+ 47. Kd1 Bd6 48. Kc2 g4 49. Kd2 1/2-1/2

[Event "Leipzig VfB op 20th"]
[Site "Leipzig"]
[Date "2013.03.06"]
[Round "3"]
[White "Didt, Hartmut"]
[Black "Petersohn, Sadko"]
[Result "1/2-1/2"]
[ECO "C41"]
[WhiteElo "1885"]
[BlackElo "1003"]
[PlyCount "45"]
[EventDate "2013.03.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 Bg4 4. Be2 Nf6 5. Nc3 Nbd7 6. 0-0 Qe7 7. Bg5 0-0-0 8. Qd3 h6 9. Bh4 g5 10. Bg3 Nh5 11. Nd5 Qe8 12. Qc3 c6 13. Nb4 exd4 14. Nxd4 Bxe2 15. Nxe2 Bg7 16. Qa3 Nxg3 17. Nxg3 Bd4 18. Nd3 Nf6 19. Rae1 a6 20. Nf5 Be5 21. Qb4 h5 22. Nxe5 Qxe5 23. Qd4 1/2-1/2

