[Event "Rottach Egern Seniors Cup 12th"]
[Site "Rottach Egern"]
[Date "2024.04.14"]
[Round "9"]
[White "Jahn, Constanze"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "2042"]
[BlackElo "2093"]
[PlyCount "22"]
[EventDate "2024.04.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CB16_2024"]
[SourceDate "2024.04.17"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.17"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. Bg5 Nbd7 5. Qd2 e5 6. Nf3 Be7 7. dxe5 dxe5 8. a4 Qc7 9. Bc4 0-0 10. 0-0 Nb6 11. Bb3 Bg4 1/2-1/2

[Event "Rottach Egern Seniors Cup 12th"]
[Site "Rottach Egern"]
[Date "2024.04.12"]
[Round "7"]
[White "Luciani, Carlo"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "2159"]
[BlackElo "2093"]
[PlyCount "48"]
[EventDate "2024.04.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CB16_2024"]
[SourceDate "2024.04.17"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.17"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. Nf3 Qa5 5. Bd2 e5 6. dxe5 dxe5 7. Nd5 Qd8 8. Nxf6+ Qxf6 9. Bg5 Qd6 10. Qe2 f6 11. Be3 Be6 12. Nd2 Qb4 13. 0-0-0 Nd7 14. Kb1 b5 15. f3 Nc5 16. Nb3 Nb7 17. Qf2 Qa4 18. h4 a5 19. g3 Qb4 20. Bh3 Bxh3 21. Rxh3 a4 22. Nc1 Qc4 23. Qe2 Qxe2 24. Nxe2 Bc5 1/2-1/2

[Event "Rottach Egern Seniors Cup 12th"]
[Site "Rottach Egern"]
[Date "2024.04.10"]
[Round "5"]
[White "Doeserich, Juergen"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "E39"]
[WhiteElo "1933"]
[BlackElo "2093"]
[PlyCount "82"]
[EventDate "2024.04.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CB16_2024"]
[SourceDate "2024.04.17"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 0-0 6. Nf3 Nc6 7. Bf4 Bxc5 8. e3 b6 9. a3 a6 10. Be2 Be7 11. Rd1 Ra7 12. 0-0 d6 13. Ng5 h6 14. Nge4 Ne8 15. h3 f5 16. Nd2 Bf6 17. Nf3 Qe7 18. Rd2 Bxc3 19. Qxc3 e5 20. Bh2 Be6 21. b4 Rc7 22. Qb2 Nd8 23. Rc1 Nb7 24. Rdc2 Nf6 25. Nd2 Ne4 26. Nf1 g5 27. f3 Nf6 28. c5 bxc5 29. Bxa6 Ra8 30. b5 Nd5 31. e4 Nb6 32. Ne3 f4 33. Nd5 Nxd5 34. exd5 Bxd5 35. Rd2 Bf7 36. Qc3 c4 37. Bxb7 Rxb7 38. Qb4 d5 39. Qxe7 Rxe7 40. Ra1 c3 41. Rdd1 d4 0-1

[Event "Rottach Egern Seniors Cup 12th"]
[Site "Rottach Egern"]
[Date "2024.04.09"]
[Round "4"]
[White "Mertens, Klaus"]
[Black "Jensen, Thomas"]
[Result "1/2-1/2"]
[ECO "A12"]
[WhiteElo "2093"]
[BlackElo "1953"]
[PlyCount "70"]
[EventDate "2024.04.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CB16_2024"]
[SourceDate "2024.04.17"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.17"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 c6 3. Bg2 Nf6 4. 0-0 Bf5 5. c4 e6 6. b3 Nbd7 7. Bb2 h6 8. d3 Be7 9. Nbd2 Qc7 10. Re1 0-0 11. e4 dxe4 12. dxe4 Bg4 13. e5 Nh7 14. Qc1 Nc5 15. Qc3 Rfd8 16. Nd4 Ng5 17. Qe3 Rd7 18. h4 Nh7 19. Bf3 Bxf3 20. N2xf3 a5 21. Re2 Rad8 22. Rd2 Na6 23. a3 Nf8 24. Rad1 Ng6 25. h5 Nf8 26. Nc2 Rxd2 27. Rxd2 Rxd2 28. Qxd2 Qb6 29. Qe3 Qxe3 30. Nxe3 Nc5 31. Nd2 Nd3 32. Bc3 b6 33. a4 Nd7 34. Ng4 Nc1 35. Kf1 Nc5 1/2-1/2

[Event "Rottach Egern Seniors Cup 12th"]
[Site "Rottach Egern"]
[Date "2024.04.08"]
[Round "3"]
[White "Schneider Zinner, Harald"]
[Black "Mertens, Klaus"]
[Result "1-0"]
[ECO "E21"]
[WhiteElo "2335"]
[BlackElo "2093"]
[PlyCount "83"]
[EventDate "2024.04.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CB16_2024"]
[SourceDate "2024.04.17"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 b6 5. Qb3 a5 6. g3 Bb7 7. Bg2 0-0 8. 0-0 d5 9. cxd5 exd5 10. Bg5 c6 11. Ne5 Qd6 12. Rac1 Nfd7 13. Nd3 Re8 14. a3 Bxc3 15. Qxc3 Na6 16. Bf4 Qe6 17. Be3 Nc7 18. a4 Na6 19. Rfe1 Rac8 20. Rcd1 Re7 21. b3 Nf8 22. Bg5 f6 23. Bc1 Qf5 24. Ba3 Ree8 25. Nf4 g5 26. Bh3 g4 27. Bg2 Ng6 28. e3 Nxf4 29. exf4 Kf7 30. Bf1 Qd7 31. Bd3 Rxe1+ 32. Rxe1 Re8 33. Bxh7 Bc8 34. Bd3 Rxe1+ 35. Qxe1 Nc7 36. f5 Ne8 37. Qe2 Ng7 38. Qxg4 Nxf5 39. Qh5+ Kg7 40. g4 Ne7 41. Qh7+ Kf8 42. Bf5 1-0

[Event "Rottach Egern Seniors Cup 12th"]
[Site "Rottach Egern"]
[Date "2024.04.07"]
[Round "2"]
[White "Mertens, Klaus"]
[Black "Wegemund, Hubert"]
[Result "1-0"]
[ECO "A87"]
[WhiteElo "2093"]
[BlackElo "1961"]
[PlyCount "95"]
[EventDate "2024.04.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CB16_2024"]
[SourceDate "2024.04.17"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.17"]
[SourceQuality "1"]

1. Nf3 f5 2. g3 d6 3. d4 Nf6 4. Bg2 g6 5. c4 Bg7 6. Nc3 0-0 7. 0-0 Qe8 8. d5 Na6 9. Nd4 Bd7 10. Rb1 c6 11. a3 Nc7 12. b4 cxd5 13. Nxd5 Nfxd5 14. cxd5 Nb5 15. Nxb5 Bxb5 16. Bb2 Ba4 17. Qd2 Bxb2 18. Qxb2 Qf7 19. Rbc1 Rfc8 20. Rxc8+ Rxc8 21. Rc1 Qe8 22. Rc3 Rxc3 23. Qxc3 Bd7 24. h4 b6 25. Qc7 Qc8 26. Qxa7 b5 27. Bf3 Kf7 28. Qe3 Qc4 29. Qh6 Kg8 30. h5 Be8 31. Qe3 Kf8 32. h6 Bf7 33. Qd2 e5 34. dxe6 Qxe6 35. Qc3 Qe5 36. Qc8+ Ke7 37. Qb7+ Kf8 38. Qc8+ Ke7 39. Qc7+ Ke6 40. e3 g5 41. Qd8 Qf6 42. Qc8+ Ke7 43. Qb7+ Kf8 44. Qxb5 f4 45. Qb8+ Ke7 46. Qa7+ Kf8 47. Qd4 Qxh6 48. exf4 1-0

[Event "Rottach Egern Seniors Cup 12th"]
[Site "Rottach Egern"]
[Date "2024.04.06"]
[Round "1"]
[White "Mitschka, Manfred"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "E16"]
[WhiteElo "1857"]
[BlackElo "2093"]
[PlyCount "104"]
[EventDate "2024.04.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CB16_2024"]
[SourceDate "2024.04.17"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 a5 7. a3 Bxd2+ 8. Qxd2 0-0 9. 0-0 d6 10. Nc3 Nbd7 11. Rfd1 Rc8 12. Rac1 Qe7 13. Re1 d5 14. Ne5 c6 15. Nxd7 Qxd7 16. cxd5 cxd5 17. e3 Rc7 18. Ne2 Ba6 19. Rxc7 Qxc7 20. Rc1 Qd7 21. Nc3 Rc8 22. Na2 Bc4 23. Qc2 Ba6 24. Qd1 Ne8 25. Rxc8 Qxc8 26. Qc1 Qd7 27. Nc3 Nd6 28. Bf1 Bxf1 29. Kxf1 Qc6 30. Ke1 g6 31. f3 h5 32. a4 Qc4 33. Qc2 Nf5 34. Qe2 Qb4 35. Kf2 Nd6 36. Qc2 Qc4 37. b3 Qc7 38. Qd2 h4 39. Kg2 hxg3 40. hxg3 Nf5 41. f4 Qc6 42. g4 Nd6 43. Kf3 Kg7 44. Qd3 Qc8 45. Kg3 Qxc3 46. Qe2 Qxb3 47. Kh4 Nc4 48. e4 Qe3 49. Qxe3 Nxe3 50. exd5 Nxd5 51. g5 Nc3 52. Kg4 Nxa4 0-1

[Event "Rheinland Pfalz Seniors op"]
[Site "Altenkirchen"]
[Date "2023.09.13"]
[Round "9"]
[White "Mertens, Klaus"]
[Black "Meyer, Armin"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2065"]
[BlackElo "2197"]
[PlyCount "40"]
[EventDate "2023.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. Nf3 c5 2. g3 d5 3. d4 cxd4 4. Nxd4 e5 5. Nf3 Nc6 6. Bg2 Nf6 7. c3 Be7 8. 0-0 h6 9. Nbd2 e4 10. Nd4 Nxd4 11. cxd4 Qb6 12. Nb1 0-0 13. a3 Bg4 14. Nc3 Rac8 15. f3 exf3 16. exf3 Bf5 17. Rf2 Rc4 18. Be3 Re8 19. Bf1 Rcc8 20. Qd2 a6 1/2-1/2

[Event "Rheinland Pfalz Seniors op"]
[Site "Altenkirchen"]
[Date "2023.09.12"]
[Round "8"]
[White "Krueger, Erich"]
[Black "Mertens, Klaus"]
[Result "1-0"]
[ECO "E42"]
[WhiteElo "2150"]
[BlackElo "2065"]
[PlyCount "121"]
[EventDate "2023.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nge2 c5 6. a3 Bxc3+ 7. Nxc3 cxd4 8. exd4 d5 9. Be3 Nbd7 10. cxd5 Nxd5 11. Nxd5 exd5 12. Be2 Nf6 13. 0-0 Bf5 14. Qb3 Qd7 15. Bf4 a6 16. Rac1 Rac8 17. Qb6 Rfe8 18. Bf3 Re6 19. Rxc8+ Qxc8 20. Qa5 b6 21. Qb4 Ne4 22. Qb3 Qd7 23. h3 h6 24. g4 Bh7 25. Kg2 g5 26. Be3 Rc6 27. Rh1 Nf6 28. Bd1 b5 29. f3 Rc4 30. h4 a5 31. hxg5 a4 32. Qa2 Qe6 33. Re1 hxg5 34. Bf2 Qc6 35. b3 Rc1 36. Qd2 axb3 37. Qxg5+ Bg6 38. Bxb3 Rxe1 39. Bxe1 Qe6 40. Bf2 Kf8 41. Qe5 Bd3 42. Bh4 Qxe5 43. dxe5 Nd7 44. f4 Nb6 45. Bf2 Nc4 46. Bc5+ Kg7 47. Kg3 Be4 48. Bd1 d4 49. Bxd4 Nxa3 50. e6+ Kg8 51. exf7+ Kxf7 52. f5 Nc2 53. Bc5 b4 54. Bxc2 Bxc2 55. Bxb4 Bd3 56. Kf4 Bc4 57. g5 Bb3 58. g6+ Kg8 59. f6 Bc4 60. Ke5 Bb3 61. Kd6 1-0

[Event "Rheinland Pfalz Seniors op"]
[Site "Altenkirchen"]
[Date "2023.09.11"]
[Round "7"]
[White "Mertens, Klaus"]
[Black "Stuemer, Paul"]
[Result "1/2-1/2"]
[ECO "E62"]
[WhiteElo "2065"]
[BlackElo "2031"]
[PlyCount "37"]
[EventDate "2023.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. 0-0 0-0 5. c4 d6 6. d4 c6 7. Nc3 Qa5 8. Qd2 e5 9. a3 exd4 10. Nxd4 Qc5 11. b3 d5 12. Na4 Qe7 13. Qe3 Qxe3 14. Bxe3 dxc4 15. bxc4 Ng4 16. Rab1 Na6 17. Rb3 Rd8 18. Nc2 Nxe3 19. Nxe3 1/2-1/2

[Event "Rheinland Pfalz Seniors op"]
[Site "Altenkirchen"]
[Date "2023.09.10"]
[Round "6"]
[White "Mertens, Klaus"]
[Black "Haubt, Georg"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "2065"]
[BlackElo "2082"]
[PlyCount "59"]
[EventDate "2023.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nc6 3. g3 Bg4 4. Bg2 Qd7 5. Bf4 f6 6. Nc3 g5 7. Be3 0-0-0 8. h4 h6 9. Nh2 Be6 10. Nf1 Bg7 11. Nd2 Na5 12. Nb3 Nc4 13. Nc5 Nxe3 14. fxe3 Qd6 15. Nxe6 Qxe6 16. Qd3 f5 17. Rf1 Qb6 18. Qxf5+ e6 19. Qg6 Bf8 20. 0-0-0 Ne7 21. Qf7 g4 22. Rf6 Rd6 23. Rxe6 Nc6 24. Nxd5 Qa5 25. Re8+ Rd8 26. Qf5+ Kb8 27. Rxd8+ Nxd8 28. Qf6 Bg7 29. Qxg7 Re8 30. Qd7 1-0

[Event "Rheinland Pfalz Seniors op"]
[Site "Altenkirchen"]
[Date "2023.09.09"]
[Round "5"]
[White "Schwickert, Michael"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "A30"]
[WhiteElo "1874"]
[BlackElo "2065"]
[PlyCount "66"]
[EventDate "2023.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. b3 Nf6 2. Bb2 e6 3. e3 Be7 4. Nf3 b6 5. Be2 Bb7 6. c4 0-0 7. 0-0 c5 8. Ne5 Nc6 9. Bf3 Qc7 10. Nxc6 Bxc6 11. Nc3 a6 12. d4 d6 13. Bxc6 Qxc6 14. d5 exd5 15. cxd5 Qb7 16. f4 b5 17. e4 b4 18. Ne2 Nxe4 19. Qd3 f5 20. Rad1 Bf6 21. Bxf6 Rxf6 22. g4 Re8 23. g5 Rff8 24. a4 bxa3 25. Ra1 Qb5 26. Nc1 Qb4 27. Ra2 Rb8 28. Qxa6 Qd4+ 29. Kg2 Qxd5 30. Qc4 Qxc4 31. bxc4 Rb2+ 32. Rxb2 axb2 33. Nd3 Nd2 0-1

[Event "Rheinland Pfalz Seniors op"]
[Site "Altenkirchen"]
[Date "2023.09.08"]
[Round "4"]
[White "Mertens, Klaus"]
[Black "Polster, Wolfgang"]
[Result "1/2-1/2"]
[ECO "A49"]
[WhiteElo "2065"]
[BlackElo "2178"]
[PlyCount "28"]
[EventDate "2023.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. Nf3 g6 2. d4 Bg7 3. g3 c5 4. c3 Na6 5. Bg2 Nf6 6. 0-0 0-0 7. Nbd2 cxd4 8. cxd4 d5 9. Ne5 Bf5 10. Qb3 Qb6 11. Qxb6 axb6 12. a3 Nb4 13. Nb3 Nc2 14. Ra2 Nb4 1/2-1/2

[Event "Rheinland Pfalz Seniors op"]
[Site "Altenkirchen"]
[Date "2023.09.07"]
[Round "3"]
[White "Wacker, Peter"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "2260"]
[BlackElo "2065"]
[PlyCount "25"]
[EventDate "2023.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. f4 Qa5 5. e5 Ne4 6. Qf3 d5 7. Bd3 Na6 8. Nge2 Nb4 9. Bxe4 dxe4 10. Qxe4 f5 11. exf6 Bf5 12. Qf3 Nxc2+ 13. Kf2 1/2-1/2

[Event "Rheinland Pfalz Seniors op"]
[Site "Altenkirchen"]
[Date "2023.09.06"]
[Round "2"]
[White "Mertens, Klaus"]
[Black "Hesse, Rutger"]
[Result "1-0"]
[ECO "D78"]
[WhiteElo "2065"]
[BlackElo "1900"]
[PlyCount "55"]
[EventDate "2023.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 d5 3. g3 g6 4. Bg2 Bg7 5. c4 c6 6. 0-0 0-0 7. b3 Ne4 8. Bb2 Nd7 9. cxd5 cxd5 10. Nc3 Ndf6 11. Rc1 Qa5 12. a4 Bd7 13. Ne5 Rfd8 14. Qd3 Nd6 15. Nxd5 Nxd5 16. Rc5 Nb4 17. Rxa5 Nxd3 18. Nxd3 b6 19. Bxa8 Rxa8 20. Re5 Bxe5 21. dxe5 Ne4 22. Rc1 Nd2 23. Rc7 Be6 24. b4 Kf8 25. Bc1 Nc4 26. Bh6+ Ke8 27. Bg5 Bd7 28. Rxc4 1-0

[Event "Rheinland Pfalz Seniors op"]
[Site "Altenkirchen"]
[Date "2023.09.05"]
[Round "1"]
[White "Blosze, Winfried"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "C27"]
[WhiteElo "1799"]
[BlackElo "2065"]
[PlyCount "56"]
[EventDate "2023.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 d6 2. Nc3 Nf6 3. Bc4 c6 4. d3 e5 5. Bg5 Be7 6. Qd2 a5 7. a4 Nbd7 8. Nge2 h6 9. Be3 Ng4 10. f3 Nxe3 11. Qxe3 Nc5 12. 0-0 0-0 13. Rad1 Qb6 14. b3 Nxa4 15. Qf2 Qxf2+ 16. Kxf2 Nb2 17. Rb1 Nxc4 18. dxc4 Be6 19. Ra1 Rfb8 20. Rfd1 g6 21. Ra2 Kf8 22. Rda1 Bd8 23. Rd1 Ke7 24. g4 Bc7 25. h3 h5 26. Rh1 Rh8 27. Raa1 Rh7 28. Rag1 Bb6+ 0-1

[Event "Rottach Egern Seniors Cup 11th"]
[Site "Rottach Egern"]
[Date "2023.04.18"]
[Round "4"]
[White "Stierle, Martin"]
[Black "Mertens, Klaus"]
[Result "1-0"]
[ECO "E49"]
[WhiteElo "1899"]
[BlackElo "2073"]
[PlyCount "73"]
[EventDate "2023.04.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 b6 7. cxd5 exd5 8. e3 0-0 9. Bd3 Re8 10. Ne2 c5 11. 0-0 Ba6 12. Ng3 Bxd3 13. Qxd3 Nc6 14. Nf5 Ne7 15. Ng3 Rc8 16. Bb2 Nc6 17. e4 Na5 18. Rae1 Qc7 19. e5 Nd7 20. Nf5 cxd4 21. Qxd4 Nc6 22. Qg4 g6 23. f4 Re6 24. Nd4 Nxd4 25. cxd4 Rc6 26. Rc1 Qd8 27. f5 Nf8 28. Rxc6 Rxc6 29. Bc1 Qc8 30. Bh6 Qe8 31. h4 b5 32. h5 Nd7 33. hxg6 hxg6 34. Rf3 Nf8 35. Rh3 Qd7 36. Bxf8 Kxf8 37. Rh8+ 1-0

[Event "Rottach Egern Seniors Cup 11th"]
[Site "Rottach Egern"]
[Date "2023.04.17"]
[Round "3"]
[White "Mertens, Klaus"]
[Black "Steiger, Michael"]
[Result "1/2-1/2"]
[ECO "A49"]
[WhiteElo "2073"]
[BlackElo "1963"]
[PlyCount "40"]
[EventDate "2023.04.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. d4 cxd4 5. Nxd4 Bg7 6. c3 Nf6 7. 0-0 0-0 8. e4 d5 9. exd5 Nxd5 10. Nxc6 bxc6 11. Nd2 Ba6 12. Re1 Qb6 13. Qb3 e6 14. Nc4 Qc5 15. Ne3 Nb6 16. Qc2 Nd5 17. Bd2 Rac8 18. Rab1 Rfd8 19. Bf1 Bxf1 20. Rxf1 Nb4 1/2-1/2

[Event "Rottach Egern Seniors Cup 11th"]
[Site "Rottach Egern"]
[Date "2023.04.16"]
[Round "2"]
[White "Kievelitz, Bernd"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "A17"]
[WhiteElo "1905"]
[BlackElo "2073"]
[PlyCount "96"]
[EventDate "2023.04.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. Nc3 b6 4. g3 Bb7 5. Bg2 Be7 6. 0-0 0-0 7. d3 c5 8. e4 d6 9. b3 Nc6 10. Bb2 Rc8 11. d4 cxd4 12. Nxd4 Qc7 13. Nc2 a6 14. Ne3 Ne5 15. Rc1 Nfd7 16. Qe2 Nc5 17. Rfd1 Bc6 18. f4 Ng6 19. h4 Bf6 20. Ng4 Bxc3 21. Rxc3 f5 22. exf5 exf5 23. Bxc6 Qxc6 24. Nf2 Rce8 25. Re3 Rxe3 26. Qxe3 Rf7 27. Qc3 Nf8 28. Rd5 Nfe6 29. Qd2 Nb7 30. Nd1 Nec5 31. Nf2 Qe8 32. Qc3 Ne4 33. Nxe4 Qxe4 34. Rd4 Qe2 35. Rd2 Qe1+ 36. Kg2 Re7 37. Rf2 Nc5 38. Qxe1 Rxe1 39. Bd4 Kf7 40. Bxc5 bxc5 41. Kf3 Rd1 42. Re2 Rd3+ 43. Kf2 g6 44. Re3 Rd1 45. Re1 Rd4 46. Re3 Rd1 47. Re1 Rd4 48. Re3 Rd1 1/2-1/2

[Event "Rottach Egern Seniors Cup 11th"]
[Site "Rottach Egern"]
[Date "2023.04.15"]
[Round "1"]
[White "Mertens, Klaus"]
[Black "Naumann, Peter"]
[Result "1-0"]
[ECO "E01"]
[WhiteElo "2073"]
[BlackElo "1771"]
[PlyCount "75"]
[EventDate "2023.04.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 Nc6 4. d4 e6 5. 0-0 Bd6 6. c4 Bd7 7. b3 b6 8. Bb2 h6 9. Nbd2 0-0 10. Ne5 Re8 11. Rc1 Bb4 12. cxd5 Nxe5 13. dxe6 Bxe6 14. dxe5 Nd5 15. a3 Be7 16. Ne4 Rc8 17. b4 f5 18. exf6 Nxf6 19. Qc2 c5 20. Rfd1 Qc7 21. Nxf6+ gxf6 22. Qg6+ Kf8 23. Be4 Red8 24. Qxh6+ Ke8 25. Qh8+ Bf8 26. Qxf6 Qe7 27. Bg6+ Bf7 28. Bxf7+ Qxf7 29. bxc5 Qxf6 30. Bxf6 Rxd1+ 31. Rxd1 Bxc5 32. Bb2 Rc7 33. Kg2 Ke7 34. e4 Ke6 35. Rd2 b5 36. Rc2 Kd6 37. f4 Re7 38. Be5+ 1-0

[Event "Altenkirchen Seniors op 19th"]
[Site "Altenkirchen"]
[Date "2022.07.27"]
[Round "9"]
[White "Waltenberger, Udo"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "D73"]
[WhiteElo "1994"]
[BlackElo "2076"]
[PlyCount "15"]
[EventDate "2022.07.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 g6 4. 0-0 Bg7 5. c4 c6 6. cxd5 cxd5 7. d4 Nc6 8. Nc3 1/2-1/2

[Event "Altenkirchen Seniors op 19th"]
[Site "Altenkirchen"]
[Date "2022.07.26"]
[Round "8"]
[White "Mertens, Klaus"]
[Black "Mueller, Norbert2222"]
[Result "1/2-1/2"]
[ECO "A97"]
[WhiteElo "2076"]
[BlackElo "1870"]
[PlyCount "139"]
[EventDate "2022.07.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. Nf3 f5 2. g3 Nf6 3. Bg2 e6 4. c4 Be7 5. Nc3 0-0 6. 0-0 d6 7. d4 Qe8 8. Re1 a5 9. e4 fxe4 10. Nxe4 Nxe4 11. Rxe4 Qh5 12. Re1 Na6 13. Ng5 Qxd1 14. Rxd1 h6 15. Ne4 d5 16. Nc3 dxc4 17. Bf1 c6 18. Bxc4 b5 19. Bf1 Nb4 20. Bf4 Nd5 21. Be5 Bd7 22. Ne4 Bf6 23. Bd6 Rfd8 24. Rac1 Be8 25. Bh3 Kf7 26. Bc5 Be7 27. Re1 Nb4 28. Bxe6+ Kxe6 29. Nc3+ Kf5 30. Rxe7 Nd3 31. Rc2 Bh5 32. Rd2 Nxc5 33. Re5+ Kg6 34. Rxc5 Bf3 35. Nd1 Rd6 36. Ne3 Rad8 37. Nf5 Bd5 38. Nxd6 Rxd6 39. f4 Kf5 40. Re2 Kg4 41. Kf2 g5 42. fxg5 hxg5 43. Re5 Rf6+ 44. Ke1 Rh6 45. Rc2 Bxa2 46. h4 gxh4 47. gxh4 Bd5 48. h5 a4 49. Rc5 Rxh5 50. Rxh5 Kxh5 51. Kd2 Kg4 52. Rc3 Kf4 53. Re3 Kf5 54. Kc3 Kf4 55. Re1 Kf3 56. Kb4 Kf4 57. Kc5 Be4 58. Kb4 Kf3 59. Kc3 Kf4 60. Kd2 Bd5 61. Re5 Kf3 62. Kd3 Bc4+ 63. Kc3 Bd5 64. Kb4 Kf4 65. Rxd5 cxd5 66. Kxb5 Ke4 67. Kc5 Kd3 68. Kxd5 Kc2 69. Ke5 Kxb2 70. d5 1/2-1/2

[Event "Altenkirchen Seniors op 19th"]
[Site "Altenkirchen"]
[Date "2022.07.25"]
[Round "7"]
[White "Mortensen, Soren K"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "1802"]
[BlackElo "2076"]
[PlyCount "44"]
[EventDate "2022.07.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. Be3 Qa5 5. Qd2 e5 6. Nf3 Be7 7. h3 a6 8. Be2 Nbd7 9. 0-0 Nf8 10. Rad1 Ng6 11. dxe5 dxe5 12. Nd5 Qxd2 13. Nxf6+ Bxf6 14. Rxd2 Nf8 15. Rfd1 Ne6 16. Bb6 0-0 17. Bc4 Re8 18. c3 g6 19. h4 Kg7 20. g3 h6 21. Nh2 h5 22. Nf3 Nf8 1/2-1/2

[Event "Altenkirchen Seniors op 19th"]
[Site "Altenkirchen"]
[Date "2022.07.24"]
[Round "6"]
[White "Mertens, Klaus"]
[Black "Koehler, Gerhard"]
[Result "1/2-1/2"]
[ECO "A37"]
[WhiteElo "2076"]
[BlackElo "2184"]
[PlyCount "90"]
[EventDate "2022.07.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. Nf3 c5 2. c4 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nc3 e5 6. d3 Nge7 7. h4 h6 8. e4 d6 9. Be3 a6 10. Qd2 Rb8 11. Nd5 Nxd5 12. cxd5 Nd4 13. Bxd4 exd4 14. 0-0 0-0 15. Rae1 Bg4 16. Qf4 Bxf3 17. Bxf3 Qc7 18. b3 b5 19. Rc1 a5 20. Rc2 Qe7 21. h5 a4 22. Rb1 g5 23. Qf5 b4 24. Bg4 axb3 25. axb3 Ra8 26. Qd7 Rfe8 27. Qxe7 Rxe7 28. f4 Rea7 29. Kf2 Ra1 30. Rbb2 gxf4 31. gxf4 Bf6 32. Kg3 Re1 33. Re2 Rg1+ 34. Rg2 Rga1 35. Bd7 Rd1 36. Rbd2 Rxd2 37. Rxd2 Kf8 38. Ba4 Ke7 39. Rb2 Rg8+ 40. Kh3 Rg1 41. e5 Bg7 42. Bb5 Rh1+ 43. Kg4 Rg1+ 44. Kf3 Rf1+ 45. Kg4 Rg1+ 1/2-1/2

[Event "Altenkirchen Seniors op 19th"]
[Site "Altenkirchen"]
[Date "2022.07.23"]
[Round "5"]
[White "Brock, Friedemann"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "E16"]
[WhiteElo "2249"]
[BlackElo "2076"]
[PlyCount "193"]
[EventDate "2022.07.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 a5 7. 0-0 0-0 8. Nc3 d5 9. Ne5 Nc6 10. Nxc6 Bxc6 11. Bg5 Bxc3 12. bxc3 h6 13. Bxf6 Qxf6 14. cxd5 exd5 15. Rc1 Rad8 16. Qd3 Rfe8 17. Rfe1 Re7 18. e3 Qd6 19. f3 Rde8 20. Rc2 Ba4 21. Rd2 Qc6 22. e4 Bb5 23. Qc2 Bc4 24. e5 Qe6 25. f4 g6 26. Rf2 Qf5 27. Qxf5 gxf5 28. Re3 Kg7 29. Bh3 Kg6 30. g4 fxg4 31. Bxg4 f5 32. Bh3 Rf8 33. Rg3+ Kh7 34. Rfg2 Ba6 35. Kf2 Bc8 36. Rg6 Be6 37. R2g3 c6 38. Bg2 b5 39. Bf3 Rg8 40. Bh5 Rxg6 41. Bxg6+ Kh8 42. a3 Bd7 43. Rh3 Kg7 44. Bh5 Be8 45. Rg3+ Kh7 46. Be2 Rg7 47. Bd3 Bd7 48. Be2 Kg8 49. Bh5 Kh7 50. Rxg7+ Kxg7 51. e6 Bxe6 52. Be8 Kf6 53. Bxc6 Ke7 54. Bxb5 Kd6 55. Ke3 Bf7 56. Kd3 Bh5 57. Kc2 Bf3 58. c4 dxc4 59. Bxc4 Bc6 60. Kc3 Bd7 61. Bf7 Bb5 62. Bg6 Ke6 63. Bh5 Kd5 64. Bf3+ Kd6 65. h4 Ke6 66. Kb3 Kd6 67. Bb7 Kc7 68. Bd5 Kd6 69. Bc4 Bd7 70. Kc3 Bc8 71. Bf7 Ba6 72. Kb3 Bb5 73. Bc4 Bd7 74. Kc3 Bc8 75. Bg8 Ba6 76. Bf7 Bb5 77. Kb3 Ke7 78. Bc4 Bd7 79. Ba6 Kd6 80. Kc4 Be6+ 81. Kc3 Bd7 82. Bb7 Kc7 83. Bf3 Bb5 84. d5 Kd6 85. Kd4 Bf1 86. Bh5 Bg2 87. Bf7 Be4 88. Kc4 Bf3 89. Kb5 Bxd5 90. Bxd5 Kxd5 91. Kxa5 Ke4 92. Kb4 Kxf4 93. a4 Kg3 94. a5 f4 95. a6 f3 96. a7 f2 97. a8Q 1/2-1/2

[Event "Altenkirchen Seniors op 19th"]
[Site "Altenkirchen"]
[Date "2022.07.22"]
[Round "4"]
[White "Mertens, Klaus"]
[Black "Paashaus, Detlef"]
[Result "1/2-1/2"]
[ECO "A10"]
[WhiteElo "2076"]
[BlackElo "1964"]
[PlyCount "33"]
[EventDate "2022.07.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. Nf3 f5 2. g3 Nf6 3. Bg2 e6 4. c4 Be7 5. 0-0 0-0 6. b3 a5 7. Bb2 Na6 8. d4 d5 9. Nbd2 c6 10. Ne5 Bd7 11. f3 c5 12. e3 b5 13. Qe2 dxc4 14. bxc4 Rb8 15. Nxd7 Qxd7 16. Rfd1 b4 17. dxc5 1/2-1/2

[Event "Altenkirchen Seniors op 19th"]
[Site "Altenkirchen"]
[Date "2022.07.21"]
[Round "3"]
[White "Zens, Rolf"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "A25"]
[WhiteElo "1884"]
[BlackElo "2076"]
[PlyCount "54"]
[EventDate "2022.07.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nf6 3. Bg2 Nc6 4. Nc3 Bc5 5. e3 0-0 6. Nge2 Re8 7. 0-0 d6 8. d4 Bb6 9. h3 Bf5 10. d5 Nb8 11. a4 a5 12. Kh2 Na6 13. f4 exf4 14. Rxf4 Bg6 15. Nd4 Nb4 16. b3 Nd3 17. Rf1 Nxc1 18. Qxc1 Qe7 19. Re1 Bxd4 20. exd4 Qxe1 21. Qxe1 Rxe1 22. Rxe1 Bc2 23. Bf1 b6 24. Nb5 Re8 25. Rxe8+ Nxe8 26. Nc3 f5 27. Kg2 Nf6 0-1

[Event "Altenkirchen Seniors op 19th"]
[Site "Altenkirchen"]
[Date "2022.07.20"]
[Round "2"]
[White "Mertens, Klaus"]
[Black "Schwab, Wolfgang"]
[Result "1-0"]
[ECO "A30"]
[WhiteElo "2076"]
[BlackElo "1807"]
[PlyCount "75"]
[EventDate "2022.07.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. Nf3 c5 2. g3 b6 3. Bg2 Bb7 4. c4 e6 5. 0-0 Nf6 6. Nc3 a6 7. b3 d6 8. Bb2 Be7 9. e3 Nbd7 10. Qe2 Qc7 11. Rfd1 0-0 12. Rac1 Rfe8 13. d4 cxd4 14. exd4 Rad8 15. a4 Qb8 16. Ne1 Bxg2 17. Kxg2 Qa8+ 18. Qf3 Qxf3+ 19. Nxf3 h6 20. Nd2 Nh7 21. a5 bxa5 22. Ra1 Ra8 23. Rxa5 Nb8 24. d5 Bd8 25. Ra2 Ra7 26. Nb5 Rd7 27. Nd4 exd5 28. cxd5 Nf6 29. Nc6 Nxc6 30. dxc6 Ra7 31. Nc4 d5 32. Bxf6 Bxf6 33. Rxd5 Rc8 34. Rd7 Rxd7 35. cxd7 Ra8 36. Re2 Kf8 37. Nd6 Be7 38. Nc8 1-0

[Event "Altenkirchen Seniors op 19th"]
[Site "Altenkirchen"]
[Date "2022.07.19"]
[Round "1"]
[White "Kurpiela, Franz"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "1782"]
[BlackElo "2076"]
[PlyCount "51"]
[EventDate "2022.07.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. Nf3 Bg4 5. Be2 e6 6. h3 Bh5 7. Bg5 Be7 8. 0-0 Bg6 9. Bd3 Nbd7 10. Re1 e5 11. a3 0-0 12. Bc4 Nh5 13. Be3 Qc7 14. Bb3 a6 15. g4 Nhf6 16. Bg5 Rfe8 17. Bh4 b5 18. Bg3 Bf8 19. Nh4 exd4 20. Qxd4 c5 21. Qd2 c4 22. Nxg6 hxg6 23. Ba2 Nc5 24. f3 Qc6 25. Rad1 Rad8 26. Bh4 1/2-1/2

[Event "Altenkirchen Seniors op 18th"]
[Site "Altenkirchen"]
[Date "2021.07.10"]
[Round "9"]
[White "Sand, Rolf"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "E01"]
[WhiteElo "1937"]
[BlackElo "2119"]
[PlyCount "49"]
[EventDate "2021.07.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 c6 5. Nf3 Nbd7 6. Qc2 Bd6 7. Nbd2 0-0 8. 0-0 Re8 9. b3 e5 10. dxe5 Nxe5 11. Bb2 dxc4 12. Nxc4 Nxc4 13. Qxc4 Be6 14. Qc2 Bg4 15. e3 Qe7 16. Ng5 Be5 17. Nf3 Bxb2 18. Qxb2 Rad8 19. Rfd1 Ne4 20. Rxd8 Rxd8 21. Qe5 Qxe5 22. Nxe5 Bf5 23. g4 Re8 24. Nxc6 Bxg4 25. Nd4 1/2-1/2

[Event "Altenkirchen Seniors op 18th"]
[Site "Altenkirchen"]
[Date "2021.07.09"]
[Round "8"]
[White "Mertens, Klaus"]
[Black "Loibl, Johann"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "2119"]
[BlackElo "1667"]
[PlyCount "51"]
[EventDate "2021.07.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. Nf3 Nc6 2. d4 d5 3. g3 Nf6 4. Bg2 e6 5. 0-0 Be7 6. b3 0-0 7. Bb2 b6 8. Nbd2 Bb7 9. c4 Na5 10. Bc3 Nc6 11. Qb1 Rb8 12. Rc1 Ba3 13. Bb2 Bxb2 14. Qxb2 Ne4 15. e3 Nb4 16. Qb1 Nf6 17. a3 Na6 18. b4 c5 19. b5 Nc7 20. Qb2 Qd7 21. a4 Rfd8 22. cxd5 Bxd5 23. dxc5 Bxf3 24. Nxf3 bxc5 25. Ne5 Qd2 26. Rc2 1-0

[Event "Altenkirchen Seniors op 18th"]
[Site "Altenkirchen"]
[Date "2021.07.08"]
[Round "7"]
[White "Mertens, Klaus"]
[Black "Klein, Gernot"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "2119"]
[BlackElo "1890"]
[PlyCount "115"]
[EventDate "2021.07.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. g3 c6 4. Bg2 Bg4 5. 0-0 Nbd7 6. b3 e6 7. Bb2 Be7 8. c4 0-0 9. Nbd2 a5 10. a3 h6 11. Re1 Bh5 12. c5 Ne4 13. b4 axb4 14. axb4 Rxa1 15. Qxa1 Qa8 16. Nxe4 dxe4 17. Nd2 f5 18. e3 Nf6 19. Bf1 b5 20. Nb3 Nd5 21. Qa5 Qxa5 22. bxa5 Ra8 23. Ra1 Ra6 24. Bc1 Bd1 25. Rb1 Bxb3 26. Rxb3 Rxa5 27. Bb2 Ra4 28. Ba3 Kf7 29. Be2 g6 30. Kf1 Bd8 31. Bd1 Ra8 32. Bc2 Ke7 33. Ke2 Kd7 34. Kf1 Kc8 35. Ke2 Kb7 36. Kf1 Be7 37. Bd1 Kc7 38. Bc2 Kd7 39. Bd1 Bf6 40. f3 Bg5 41. f4 Be7 42. Kf2 Bd8 43. Bc2 g5 44. Bd1 g4 45. Bc2 h5 46. Bd1 Be7 47. Bc2 h4 48. Bd1 h3 49. Be2 Bd8 50. Bd1 b4 51. Bxb4 Nxb4 52. Rxb4 Ra1 53. Bb3 Rh1 54. Rb7+ Kc8 55. Rh7 Rxh2+ 56. Kf1 Rh1+ 57. Kf2 Rh2+ 58. Kf1 1/2-1/2

[Event "Altenkirchen Seniors op 18th"]
[Site "Altenkirchen"]
[Date "2021.07.07"]
[Round "6"]
[White "Baumgarten, Werner"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "E17"]
[WhiteElo "1760"]
[BlackElo "2119"]
[PlyCount "120"]
[EventDate "2021.07.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 b6 4. g3 Bb7 5. Bg2 c5 6. e3 Be7 7. 0-0 0-0 8. Nc3 d5 9. cxd5 exd5 10. dxc5 bxc5 11. b3 Nbd7 12. Bb2 Nb6 13. a4 a6 14. Rc1 Rc8 15. Ne2 Re8 16. Nf4 Bd6 17. Qc2 c4 18. Bd4 Nbd7 19. Qb2 cxb3 20. Qxb3 Bc6 21. Rc2 Qa5 22. Ra1 Ne4 23. Bh3 Rb8 24. Qa2 Ndc5 25. Nxd5 Nb3 26. Rxc6 Qxd5 27. Rxa6 Qh5 28. Bg2 Nxa1 29. Qxa1 Bf8 30. Ra7 Qf5 31. a5 Nxg3 32. hxg3 Rb1+ 33. Qxb1 Qxb1+ 34. Kh2 Qa2 35. Ne5 f6 36. Nd3 Qe2 37. Nf4 Qxf2 38. Rb7 Bd6 39. Rb2 Qe1 40. a6 Qa5 41. a7 h5 42. Bd5+ Kh7 43. Ra2 Qe1 44. a8Q Rxa8 45. Bxa8 h4 46. Be4+ Kh6 47. Ne2 Qf2+ 48. Kh3 Bxg3 49. Nc3 Qf1+ 50. Kg4 g6 51. Bxf6 Qxf6 52. Nd5 Qe6+ 53. Kf3 g5 54. Ra4 Be5 55. Ra7 g4+ 56. Ke2 Kg5 57. Re7 Qa6+ 58. Kd2 Qa2+ 59. Kd1 Qb3+ 60. Ke2 Qc4+ 0-1

[Event "Altenkirchen Seniors op 18th"]
[Site "Altenkirchen"]
[Date "2021.07.06"]
[Round "5"]
[White "Mertens, Klaus"]
[Black "Hoefer, Heijo"]
[Result "1/2-1/2"]
[ECO "A34"]
[WhiteElo "2119"]
[BlackElo "1767"]
[PlyCount "73"]
[EventDate "2021.07.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 c5 3. g3 Nc6 4. Bg2 d5 5. cxd5 Nxd5 6. Nc3 Nb6 7. 0-0 e5 8. b3 Be7 9. Bb2 0-0 10. Rc1 f6 11. Ne4 c4 12. bxc4 f5 13. Nc3 e4 14. Ne1 Nxc4 15. d3 Nxb2 16. Qb3+ Kh8 17. Qxb2 exd3 18. Nxd3 Qa5 19. Nd5 Ba3 20. Qa1 Bxc1 21. Rxc1 Be6 22. N3f4 Bxd5 23. Bxd5 Rfd8 24. Bxc6 bxc6 25. Rxc6 Qa4 26. Rc1 Qd4 27. Qb1 Qd2 28. Rc7 Qd1+ 29. Qxd1 Rxd1+ 30. Kg2 Rd6 31. h4 g6 32. Nd3 a6 33. Ne5 Re6 34. Nf7+ Kg8 35. Nh6+ Kh8 36. Nf7+ Kg8 37. Nh6+ 1/2-1/2

[Event "Altenkirchen Seniors op 18th"]
[Site "Altenkirchen"]
[Date "2021.07.05"]
[Round "4"]
[White "Heid, Michael"]
[Black "Mertens, Klaus"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "1942"]
[BlackElo "2119"]
[PlyCount "85"]
[EventDate "2021.07.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 e6 3. e3 Be7 4. Bd3 b6 5. Qf3 d5 6. Nd2 Ba6 7. Bxa6 Nxa6 8. c3 c6 9. Ne2 Nc7 10. h4 Qd7 11. Ng3 h6 12. Bxf6 Bxf6 13. Nh5 Ke7 14. e4 e5 15. dxe5 Bxe5 16. 0-0-0 Kf8 17. Nc4 Qe6 18. Nxe5 Qxe5 19. Rhe1 Re8 20. exd5 Qxe1 21. Rxe1 Rxe1+ 22. Kd2 Re5 23. dxc6 Ke7 24. Nxg7 Rd8+ 25. Kc2 Kf8 26. Nf5 Re6 27. Qg4 Ne8 28. Nd4 Rf6 29. f4 Nd6 30. f5 Re8 31. Qf3 Nc4 32. g4 Ne5 33. Qf4 Nxc6 34. Nxc6 Rxc6 35. f6 Re2+ 36. Kd3 Rce6 37. Qxh6+ Ke8 38. Qf4 R2e5 39. h5 Rd6+ 40. Kc2 Re2+ 41. Kb3 Kd7 42. Qa4+ Kc8 43. Qa6+ 1-0

[Event "Altenkirchen Seniors op 18th"]
[Site "Altenkirchen"]
[Date "2021.07.04"]
[Round "3"]
[White "Mertens, Klaus"]
[Black "Ranker, Klemens"]
[Result "1-0"]
[ECO "E62"]
[WhiteElo "2119"]
[BlackElo "1824"]
[PlyCount "37"]
[EventDate "2021.07.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 d6 5. d4 0-0 6. 0-0 Bg4 7. Nc3 c6 8. Qc2 Qd7 9. Rd1 Bh3 10. Bh1 h6 11. e3 Bg4 12. b3 Na6 13. a3 Nc7 14. Bb2 Ne6 15. Rd2 Rfd8 16. d5 Nf8 17. dxc6 bxc6 18. Ne5 Qc7 19. Nxc6 1-0

[Event "Altenkirchen Seniors op 18th"]
[Site "Altenkirchen"]
[Date "2021.07.03"]
[Round "2"]
[White "Busic, Nedjeljko"]
[Black "Mertens, Klaus"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1901"]
[BlackElo "2119"]
[PlyCount "91"]
[EventDate "2021.07.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. Bg5 Qa5 5. Bxf6 gxf6 6. Qd2 f5 7. Bd3 Qb6 8. Nge2 fxe4 9. Bxe4 d5 10. Bd3 Qxb2 11. Rb1 Qa3 12. Rb3 Qd6 13. 0-0 Nd7 14. Nb1 Nb6 15. f4 h5 16. Qe3 Bg7 17. f5 Bf6 18. Nd2 Nd7 19. c4 b6 20. cxd5 cxd5 21. Rc1 Bb7 22. Rbc3 Kd8 23. Bb5 Nb8 24. Nf3 a6 25. Ba4 b5 26. Bb3 Nd7 27. Nf4 h4 28. Rc7 Rb8 29. Nd3 Qxc7 30. Rxc7 Kxc7 31. Nde5 Rh7 32. Nxd7 Kxd7 33. Ne5+ Ke8 34. Qf3 Rd8 35. Qc3 Rc8 36. Qf3 Rd8 37. Qg4 Rg7 38. Qh5 Bxe5 39. dxe5 Kd7 40. Qxh4 Rdg8 41. g3 Rg4 42. Qh5 R4g7 43. Qh6 e6 44. fxe6+ fxe6 45. Bc2 a5 46. Bh7 1-0

[Event "Altenkirchen Seniors op 18th"]
[Site "Altenkirchen"]
[Date "2021.07.02"]
[Round "1"]
[White "Mertens, Klaus"]
[Black "Bade, Heidrun"]
[Result "1-0"]
[ECO "A33"]
[WhiteElo "2119"]
[BlackElo "1790"]
[PlyCount "57"]
[EventDate "2021.07.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 c5 3. Bg2 Nc6 4. c4 e6 5. Nc3 Be7 6. 0-0 0-0 7. d4 cxd4 8. Nxd4 a6 9. b3 Bc5 10. e3 e5 11. Nc2 d6 12. Na4 Qc7 13. Bb2 Nb4 14. Nxb4 Bxb4 15. a3 Bc5 16. Rc1 Rb8 17. b4 Ba7 18. c5 Bg4 19. Qxd6 Qxd6 20. cxd6 Nd7 21. Rc7 b5 22. Rxa7 bxa4 23. Bc6 Rfd8 24. Rc1 f6 25. Bd5+ Kf8 26. Rcc7 Rb6 27. Bc6 Ke8 28. f4 e4 29. Bd4 1-0

[Event "RLP Seniors op 17th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2019.07.28"]
[Round "9"]
[White "Niebling, Ferdinand"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "E49"]
[WhiteElo "2006"]
[BlackElo "2119"]
[PlyCount "72"]
[EventDate "2019.07.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 0-0 7. cxd5 exd5 8. e3 b6 9. Bd3 Ba6 10. Ne2 Re8 11. Bxa6 Nxa6 12. Qd3 Nb8 13. 0-0 Qc8 14. Ng3 Qa6 15. Qxa6 Nxa6 16. Bd2 Re6 17. Rfe1 Rae8 18. a4 Nb8 19. Rec1 Rc6 20. e4 dxe4 21. fxe4 Rc4 22. Re1 Nc6 23. Ra3 Na5 24. h3 h6 25. Kf2 Rc6 26. Bf4 g5 27. Bc1 Kh7 28. e5 Nd5 29. Ne4 f5 30. Nd2 Rxc3 31. Rxc3 Nxc3 32. Ba3 Nd5 33. e6 Nf4 34. Kf3 Rxe6 35. Rc1 Nd5 36. Nc4 Re4 0-1

[Event "RLP Seniors op 17th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2019.07.27"]
[Round "8"]
[White "Mertens, Klaus"]
[Black "Mueller, Erich2222"]
[Result "0-1"]
[ECO "A46"]
[WhiteElo "2119"]
[BlackElo "2137"]
[PlyCount "94"]
[EventDate "2019.07.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. Nf3 d6 2. d4 Nf6 3. g3 Nbd7 4. Bg2 e5 5. d5 Be7 6. c4 0-0 7. Qc2 a5 8. Nc3 Nc5 9. Be3 b6 10. 0-0 Ng4 11. Bxc5 bxc5 12. e4 Nh6 13. Nd2 f5 14. f3 Bg5 15. Rae1 f4 16. Nb5 Bd7 17. a4 Nf7 18. Rf2 h5 19. Rfe2 Bh6 20. Qd3 g5 21. Nf1 g4 22. Rc2 Ng5 23. gxf4 exf4 24. Nd2 Nf7 25. Qe2 Ne5 26. Qf1 Kh8 27. Kf2 g3+ 28. Ke2 h4 29. Bh3 Rg8 30. Qg2 Qc8 31. Be6 Bxe6 32. dxe6 Qd8 33. Qh3 Rg7 34. Rh1 Qg5 35. Nc3 c6 36. b3 Rh7 37. Qf5 Rf8 38. Qxg5 Bxg5 39. h3 Re7 40. Nd1 Rxe6 41. Nb2 Bh6 42. Rg1 Nf7 43. Kf1 Ng5 44. Kg2 Bg7 45. Nb1 Nxe4 46. fxe4 f3+ 47. Kf1 Bd4 0-1

[Event "RLP Seniors op 17th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2019.07.26"]
[Round "7"]
[White "Jacob, Helmut"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "B01"]
[WhiteElo "2131"]
[BlackElo "2119"]
[PlyCount "42"]
[EventDate "2019.07.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 Bg4 6. Be2 e6 7. 0-0 a6 8. Ne5 Bxe2 9. Nxe2 Be7 10. Bf4 Qd8 11. c4 c5 12. Qa4+ Kf8 13. dxc5 Bxc5 14. b4 Be7 15. Rfd1 Qe8 16. Qb3 Nc6 17. Nd3 h5 18. a4 Rd8 19. Nc5 e5 20. Be3 Rxd1+ 21. Rxd1 Ng4 1/2-1/2

[Event "RLP Seniors op 17th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2019.07.25"]
[Round "6"]
[White "Mertens, Klaus"]
[Black "Kripp, Wolfgang"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "2119"]
[BlackElo "1995"]
[PlyCount "71"]
[EventDate "2019.07.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 c6 4. 0-0 Bf5 5. c4 e6 6. d4 Bd6 7. Nc3 0-0 8. Nh4 Bg4 9. h3 Bh5 10. Qd3 h6 11. e4 dxe4 12. Nxe4 Nxe4 13. Bxe4 f5 14. Bf3 Bxf3 15. Nxf3 Nd7 16. c5 Bc7 17. Qb3 Rf6 18. Qxb7 e5 19. Qb3+ Kh8 20. dxe5 Nxe5 21. Rd1 Qf8 22. Nxe5 Bxe5 23. Qc2 Rb8 24. Rb1 Rb5 25. b4 a5 26. a3 Qb8 27. f4 Bc7 28. Rd7 Rg6 29. Kh2 Re6 30. Qc3 Rf6 31. Be3 Rb7 32. Bd4 Qe8 33. Rxg7 Qe2+ 34. Kg1 Bxf4 35. Rxb7 Be3+ 36. Bxe3 1-0

[Event "RLP Seniors op 17th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2019.07.24"]
[Round "5"]
[White "Loos, Udo"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "A39"]
[WhiteElo "2017"]
[BlackElo "2119"]
[PlyCount "68"]
[EventDate "2019.07.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 c5 3. Bg2 Nc6 4. Nc3 g6 5. Nf3 Bg7 6. d4 cxd4 7. Nxd4 0-0 8. 0-0 Qb6 9. Nc2 d6 10. b3 Bd7 11. e4 Rac8 12. Bg5 Be6 13. Rc1 h6 14. Be3 Qa5 15. Bd2 Qd8 16. Nd5 Kh7 17. Nce3 Qd7 18. Nf4 Ne5 19. h3 g5 20. Nxe6 fxe6 21. Bc3 Ng6 22. Qe2 Qc7 23. Kh2 Rf7 24. Ba1 Rcf8 25. Nc2 e5 26. Ne3 e6 27. Rcd1 Qc5 28. Rd2 Ne8 29. f3 Ne7 30. Nc2 Nc6 31. Rfd1 Qa5 32. a3 Qb6 33. b4 a6 34. Bc3 Nb8 1/2-1/2

[Event "RLP Seniors op 17th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2019.07.23"]
[Round "4"]
[White "Mertens, Klaus"]
[Black "Bachmann, Rolf"]
[Result "1-0"]
[ECO "A07"]
[WhiteElo "2119"]
[BlackElo "1963"]
[PlyCount "91"]
[EventDate "2019.07.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 c6 3. Bg2 f5 4. c4 e6 5. b3 Nf6 6. Bb2 g6 7. 0-0 Bg7 8. d3 0-0 9. Nbd2 Nbd7 10. Ne5 Nxe5 11. Bxe5 Qe7 12. Nf3 Bd7 13. d4 Rfc8 14. c5 a5 15. a3 Ra6 16. Qd3 Qd8 17. Rfb1 Rca8 18. b4 R8a7 19. Ne1 b5 20. cxb6 Rxb6 21. Bd6 Ne4 22. Bc5 Nxc5 23. bxc5 Rb8 24. Rxb8 Qxb8 25. Rb1 Rb7 26. Rxb7 Qxb7 27. f4 Bc8 28. e3 Qa6 29. Bf1 Qxd3 30. Bxd3 Kf8 31. Nf3 Ke7 32. Nd2 Kd7 33. Nb3 a4 34. Nc1 Bf6 35. Bc2 Ba6 36. Bxa4 Bd8 37. Nb3 Bc4 38. Nd2 Ba6 39. Nf3 Bb7 40. Kf2 Ba5 41. Ng5 h5 42. Nf7 Bc3 43. Ne5+ Kc7 44. Bb3 Bc8 45. Nxg6 Bd7 46. Nf8 1-0

[Event "RLP Seniors op 17th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2019.07.22"]
[Round "3"]
[White "Armbruester, Juergen"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "B01"]
[WhiteElo "1966"]
[BlackElo "2119"]
[PlyCount "50"]
[EventDate "2019.07.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 c6 6. Be2 Bf5 7. 0-0 e6 8. Ne5 Be7 9. Bf4 Qd8 10. Qd2 0-0 11. a3 Nbd7 12. Bd3 Bxd3 13. Qxd3 Nb6 14. Rad1 Nbd5 15. Nxd5 cxd5 16. Bg5 Rc8 17. c3 a6 18. Bxf6 Bxf6 19. f4 g6 20. Rf3 Bg7 21. Rc1 Rc7 22. Qd2 Re8 23. Kh1 Qd6 24. Nd3 Rce7 25. Rf2 Qc7 1/2-1/2

[Event "RLP Seniors op 17th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2019.07.21"]
[Round "2"]
[White "Mertens, Klaus"]
[Black "Duijker, Bert"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "2119"]
[BlackElo "1906"]
[PlyCount "103"]
[EventDate "2019.07.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. Nf3 c5 2. g3 Nc6 3. Bg2 d5 4. d4 e6 5. 0-0 Nf6 6. b3 cxd4 7. Nxd4 Be7 8. Bb2 0-0 9. Nd2 Bd7 10. c4 Nxd4 11. Bxd4 Bc6 12. Rc1 Qd7 13. Nf3 Rfc8 14. Ne5 Qe8 15. Rc2 Nd7 16. Nxc6 bxc6 17. cxd5 cxd5 18. Bb2 Rxc2 19. Qxc2 Rc8 20. Qd2 Bf6 21. e4 dxe4 22. Bxe4 Bxb2 23. Qxb2 Nf6 24. Bf3 Rc7 25. Rc1 Qc8 26. Rxc7 Qxc7 27. Qd4 h6 28. Qa4 g5 29. a3 Kg7 30. b4 Nd7 31. Qc6 Qxc6 32. Bxc6 Nb8 33. Bb5 Kf6 34. Kg2 Ke5 35. Kf3 f5 36. Ke3 f4+ 37. Kf3 fxg3 38. fxg3 a6 39. Be8 Kd4 40. a4 e5 41. b5 e4+ 42. Ke2 a5 43. g4 Kc5 44. Ke3 Kb4 45. b6 Kc5 46. b7 Kb6 47. Kxe4 Kxb7 48. Kf5 Na6 49. Kg6 Nc7 50. Bf7 Na6 51. Kxh6 Nc5 52. Kxg5 1-0

[Event "RLP Seniors op 17th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2019.07.20"]
[Round "1"]
[White "Giesau, Bernhard"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "E08"]
[WhiteElo "1819"]
[BlackElo "2119"]
[PlyCount "117"]
[EventDate "2019.07.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. b3 Be7 4. Bb2 0-0 5. g3 d5 6. Bg2 c6 7. 0-0 Nbd7 8. d4 b6 9. Qc2 Bb7 10. Nc3 Rc8 11. Rac1 Qc7 12. cxd5 cxd5 13. Qd3 Qb8 14. Rfe1 Rfd8 15. Qb1 a5 16. e3 Ba8 17. Nb5 Bc6 18. Bf1 Ne4 19. Bd3 Ndf6 20. a3 h6 21. Re2 Nd6 22. Nxd6 Bxd6 23. Rec2 Bb7 24. Rxc8 Rxc8 25. Rc2 Ne8 26. Nd2 Be7 27. Nf3 Rc7 28. Qc1 Rxc2 29. Qxc2 Qc7 30. Qxc7 Nxc7 31. Ne5 Ba6 32. Bxa6 Nxa6 33. Nd3 Kf8 34. f3 Ke8 35. Kf2 f6 36. e4 Kd7 37. Nf4 Nc7 38. Ke3 g5 39. Nd3 Na6 40. h3 Kc6 41. g4 Bd6 42. f4 dxe4 43. Kxe4 Nc7 44. f5 Kd7 45. b4 axb4 46. Nxb4 Bxb4 47. axb4 b5 48. Bc1 Nd5 49. Bd2 Ne7 50. Bc3 exf5+ 51. gxf5 Kd6 52. Be1 Nd5 53. Bd2 h5 54. Kf3 Nb6 55. Ke4 h4 56. Bc3 Nd5 57. Bd2 Kc6 58. Kf3 Kd7 59. Ke4 1/2-1/2

[Event "Rheinland Pfalz op Seniors 16th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2018.07.15"]
[Round "9"]
[White "Degenhardt, Horst"]
[Black "Mertens, Klaus"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "2206"]
[BlackElo "2119"]
[PlyCount "21"]
[EventDate "2018.07.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 c6 6. Be2 g6 7. Ne5 Bf5 8. Bf4 Qb4 9. Nc4 e6 10. Bd6 Bxd6 11. a3 1-0

[Event "Rheinland Pfalz op Seniors 16th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2018.07.14"]
[Round "8"]
[White "Mertens, Klaus"]
[Black "Hagen, Peter"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2119"]
[BlackElo "2199"]
[PlyCount "98"]
[EventDate "2018.07.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 Nc6 3. d4 Bg4 4. Bg2 Nf6 5. Ne5 Bf5 6. c4 Bxb1 7. Rxb1 e6 8. Qa4 Bb4+ 9. Kf1 Be7 10. Nxc6 Qd7 11. cxd5 exd5 12. Bf4 Qxc6 13. Qxc6+ bxc6 14. Bxc7 Kd7 15. Be5 Bd6 16. Bxf6 gxf6 17. e4 dxe4 18. Bxe4 Rab8 19. Ke2 Rb4 20. Kd3 c5 21. Bf5+ Kc6 22. dxc5 Bxc5 23. Ke2 Re8+ 24. Kf3 h6 25. Rhd1 Re5 26. g4 Rd4 27. a3 Rxd1 28. Rxd1 Bd6 29. Be4+ Kc7 30. Rc1+ Rc5 31. Rxc5+ Bxc5 32. Bd5 a5 33. Bxf7 Bd4 34. b3 Bb2 35. a4 Bd4 36. Ke2 Be5 37. h4 Kd6 38. Ke3 Ke7 39. Bc4 Kf8 40. Ke4 Bc3 41. f4 Be1 42. Kf5 Kg7 43. g5 hxg5 44. hxg5 fxg5 45. Kxg5 Bd2 46. Kf5 Kf8 47. Ke5 Bc3+ 48. Ke6 Bd2 49. f5 Bc3 1/2-1/2

[Event "Rheinland Pfalz op Seniors 16th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2018.07.13"]
[Round "7"]
[White "Loos, Udo"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "A37"]
[WhiteElo "2030"]
[BlackElo "2119"]
[PlyCount "24"]
[EventDate "2018.07.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e6 6. d3 Nge7 7. Bg5 Qa5 8. Bd2 Qd8 9. Qc1 Nf5 10. Ne4 d6 11. h4 h5 12. Bc3 e5 1/2-1/2

[Event "Rheinland Pfalz op Seniors 16th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2018.07.12"]
[Round "6"]
[White "Mertens, Klaus"]
[Black "Dickel, Gisbert"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "2119"]
[BlackElo "1925"]
[PlyCount "139"]
[EventDate "2018.07.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 e6 2. g3 f5 3. Bg2 d5 4. b3 Nf6 5. Bb2 a5 6. 0-0 a4 7. c4 a3 8. Bxf6 Qxf6 9. d4 Bb4 10. Qc2 c6 11. Nc3 0-0 12. c5 Nd7 13. Na4 e5 14. e3 e4 15. Nd2 g5 16. f3 exf3 17. Rxf3 Rxa4 18. bxa4 Bxc5 19. Raf1 Bxd4 20. exd4 Qxd4+ 21. Kh1 Ne5 22. Rxa3 Ng4 23. Nf3 Qg7 24. h3 Nf6 25. Nd4 Ne4 26. Bxe4 fxe4 27. Rxf8+ Qxf8 28. Qc1 h6 29. Rb3 c5 30. Ne2 c4 31. Rc3 Bxh3 32. Qg1 Bg4 33. Nd4 Qe8 34. Qf2 Qxa4 35. Rc1 Qe8 36. Qe3 Kh7 37. Rb1 Qf7 38. Kg1 Qc7 39. Kf2 Qf7+ 40. Ke1 Qc7 41. a3 Kg6 42. Kd2 Qa5+ 43. Rb4 Bd7 44. Kc2 b5 45. Kb2 Qc7 46. Kc2 Qc5 47. Kd2 Qf8 48. Nxb5 Qf1 49. Nd4 Qa1 50. Nc2 Qe5 51. Rb6+ Kh7 52. Rb7 Qd6 53. Qa7 Qxg3 54. Rxd7+ Kg6 55. Rg7+ Kh5 56. Qf7+ Kh4 57. Qxd5 c3+ 58. Kc1 Qf4+ 59. Kb1 g4 60. Re7 Qb8+ 61. Rb7 Qf4 62. Rb4 Qf1+ 63. Ka2 Qd3 64. Qxe4 Qd7 65. Qe1+ Kg5 66. Qxc3 h5 67. Qe5+ Kh4 68. Ne3 Qf7+ 69. Ka1 Qf2 70. Rb2 1-0

[Event "Rheinland Pfalz op Seniors 16th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2018.07.11"]
[Round "5"]
[White "Haag, Guenter"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "A01"]
[WhiteElo "1929"]
[BlackElo "2119"]
[PlyCount "120"]
[EventDate "2018.07.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. b3 e5 2. Bb2 d6 3. e3 Nf6 4. c4 Bf5 5. d3 Be7 6. Nf3 h6 7. Be2 0-0 8. h3 c6 9. e4 Bd7 10. g4 Nh7 11. Nbd2 c5 12. Nf1 Nc6 13. Ne3 Nd4 14. Nd5 Be6 15. Nxe7+ Qxe7 16. Bc1 Nxf3+ 17. Bxf3 Qh4 18. Bg2 Bd7 19. Qf3 b5 20. Be3 a5 21. Ke2 Rfb8 22. Qg3 Qxg3 23. fxg3 a4 24. Rhb1 Nf8 25. Kf3 b4 26. Bf1 Rb7 27. Be2 axb3 28. axb3 Rba7 29. Rxa7 Rxa7 30. h4 Ra2 31. Bd1 Ne6 32. Rc1 Bc6 33. Rc2 Ra1 34. Ke2 Bd7 35. Kd2 g5 36. Rc1 Ra2+ 37. Rc2 Ra3 38. Rc1 Kg7 39. Ke1 Kg6 40. Kd2 Nf8 41. Ke1 Ra2 42. hxg5 hxg5 43. Rc2 Rxc2 44. Bxc2 Bxg4 45. Kf2 Ne6 46. Kg2 Ng7 47. Kf2 f5 48. exf5+ Nxf5 49. Bd2 Nd4 50. Bb1 Nxb3 51. Be3 Nd4 52. Bxd4 exd4 53. Bc2 Kf5 54. Bb3 Ke5 55. Ba2 Be6 56. Kf3 d5 57. Bb3 dxc4 58. dxc4 Bf5 59. Bd1 Bd3 60. Bb3 Kf5 0-1

[Event "Rheinland Pfalz op Seniors 16th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2018.07.10"]
[Round "4"]
[White "Mertens, Klaus"]
[Black "Kalepky, Helmut"]
[Result "1/2-1/2"]
[ECO "E60"]
[WhiteElo "2119"]
[BlackElo "1980"]
[PlyCount "61"]
[EventDate "2018.07.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 0-0 5. 0-0 d6 6. d4 Na6 7. b3 c6 8. Bb2 Bf5 9. Nh4 Bxb1 10. Rxb1 d5 11. Nf3 e6 12. Ne5 Nd7 13. Nd3 Qb6 14. e3 Rfe8 15. Qd2 Qd8 16. a4 Nc7 17. a5 a6 18. Ba3 Bf8 19. Bxf8 Rxf8 20. Qb4 Rb8 21. Nc5 Nxc5 22. Qxc5 Re8 23. Rfc1 Qe7 24. cxd5 Qxc5 25. Rxc5 exd5 26. h4 Re7 27. Rc3 Nb5 28. Rc5 Nc7 29. Bf1 Rd8 30. Rcc1 Rd6 31. Rb2 1/2-1/2

[Event "Rheinland Pfalz op Seniors 16th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2018.07.09"]
[Round "3"]
[White "Cleve Prinz, Wolfgang"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "E17"]
[WhiteElo "1999"]
[BlackElo "2119"]
[PlyCount "57"]
[EventDate "2018.07.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. b3 c5 4. Bb2 Be7 5. g3 b6 6. Bg2 Bb7 7. 0-0 0-0 8. Nc3 d5 9. cxd5 exd5 10. d4 Nbd7 11. e3 Rc8 12. Rc1 Re8 13. Bh3 Ba6 14. Re1 Rc7 15. a4 c4 16. Nb5 Bxb5 17. axb5 Bb4 18. bxc4 Bxe1 19. Qxe1 dxc4 20. Qe2 c3 21. Rxc3 Rxc3 22. Bxc3 Nd5 23. Bb2 Qc7 24. Qd3 N7f6 25. Ne5 Nb4 26. Qb3 a5 27. bxa6 Nxa6 28. Bf1 b5 29. Qxb5 1/2-1/2

[Event "Rheinland Pfalz op Seniors 16th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2018.07.08"]
[Round "2"]
[White "Mertens, Klaus"]
[Black "Thronicke, Klaus Peter"]
[Result "1-0"]
[ECO "A43"]
[WhiteElo "2119"]
[BlackElo "1904"]
[PlyCount "49"]
[EventDate "2018.07.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 c5 3. d4 cxd4 4. Nxd4 e5 5. Nb3 Nc6 6. Bg2 Be6 7. 0-0 Be7 8. Nc3 Nf6 9. Bg5 d4 10. Bxf6 Bxf6 11. Ne4 Be7 12. Nec5 Bc8 13. c3 Bxc5 14. Nxc5 dxc3 15. bxc3 Qc7 16. Qa4 0-0 17. Rab1 Rb8 18. Rfd1 Rd8 19. Rxd8+ Qxd8 20. Bxc6 Qc7 21. Nxb7 Bxb7 22. Rxb7 Rxb7 23. Bxb7 g6 24. Bd5 Qe7 25. Qb4 1-0

[Event "Rheinland Pfalz op Seniors 16th"]
[Site "Neustadt an der Weinstrasse"]
[Date "2018.07.07"]
[Round "1"]
[White "Rauscher, Joachim"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "1817"]
[BlackElo "2119"]
[PlyCount "114"]
[EventDate "2018.07.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. Bc4 Nf6 5. d3 c6 6. Nf3 Bg4 7. h3 Bh5 8. g4 Bg6 9. Qe2 Nbd7 10. Be3 b5 11. Bb3 Nc5 12. Bxc5 Qxc5 13. Ne5 e6 14. 0-0-0 Bd6 15. d4 Qb6 16. Nxg6 hxg6 17. Kb1 0-0 18. Ne4 Nxe4 19. Qxe4 a5 20. c4 bxc4 21. Bxc4 Rfb8 22. Rd2 a4 23. Rc2 Ba3 24. Qe2 Qxd4 25. Rd1 Qf6 26. Rd3 Bb4 27. Rf3 Qe7 28. Re3 Bc5 29. Rd3 Ra7 30. f4 Rab7 31. f5 gxf5 32. gxf5 exf5 33. Qf3 Qf6 34. Qe2 Bd4 35. b3 Re7 36. Qd1 c5 37. Re2 Rbe8 38. Rxe7 Rxe7 39. Rd2 a3 40. Re2 g6 41. Rg2 Kg7 42. Re2 Re3 43. Rxe3 Bxe3 44. Qe2 Qd4 45. Bd3 f4 46. h4 f3 47. Qc2 Qxh4 48. Qd1 Qd4 49. Qc2 Bf4 50. Bf1 Be5 51. Kc1 Qa1+ 52. Qb1 Qb2+ 53. Qxb2 axb2+ 54. Kc2 g5 55. a4 g4 56. a5 g3 57. a6 g2 0-1

[Event "Schleswig Holstein-ch Seniors op 11th"]
[Site "Buesum"]
[Date "2017.09.16"]
[Round "9"]
[White "Mertens, Klaus"]
[Black "Bieberle, Gerhart"]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "2084"]
[BlackElo "1927"]
[PlyCount "102"]
[EventDate "2017.09.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 d5 5. Bg2 c5 6. 0-0 0-0 7. d4 cxd4 8. Nxd4 Nc6 9. e3 e6 10. Nd2 Nxd4 11. Bxd4 Bd7 12. c4 Bc6 13. Rc1 Qa5 14. Rc2 Nh5 15. Qa1 Bxd4 16. Qxd4 Rfd8 17. Qe5 Rac8 18. Rfc1 Ng7 19. cxd5 exd5 20. Ne4 Ne8 21. Nf6+ Nxf6 22. Qxf6 Qb4 23. Qc3 Qxc3 24. Rxc3 Kf8 25. Rc5 Rb8 26. Rd1 Ke7 27. Bxd5 Bxd5 28. Rdxd5 Rxd5 29. Rxd5 Rc8 30. Ra5 a6 31. h4 h5 32. Kg2 Rc2 33. Kf3 Ke6 34. e4 f6 35. Ke3 Rc1 36. Kf4 Rc3 37. f3 Rc2 38. g4 hxg4 39. fxg4 Rf2+ 40. Kg3 Re2 41. Kf3 Rh2 42. h5 g5 43. Ra4 Rh3+ 44. Kg2 Rd3 45. Rb4 Rd7 46. a4 Ke5 47. Kf3 Rd3+ 48. Ke2 Rg3 49. Rxb7 Rxg4 50. Re7+ Kd6 51. Ra7 Rxe4+ 1/2-1/2

[Event "Schleswig Holstein-ch Seniors op 11th"]
[Site "Buesum"]
[Date "2017.09.15"]
[Round "8"]
[White "Fleischer, Martin"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "1919"]
[BlackElo "2084"]
[PlyCount "120"]
[EventDate "2017.09.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. d4 Nf6 4. Nf3 c6 5. Be2 g6 6. c3 Bg7 7. h3 0-0 8. Be3 Bf5 9. Nbd2 Nbd7 10. Bc4 Qd6 11. b4 a5 12. bxa5 Rxa5 13. 0-0 Nd5 14. Bxd5 cxd5 15. Nb3 Ra6 16. a4 Rc8 17. Bd2 Qc6 18. a5 Qb5 19. Re1 e6 20. Ne5 Nxe5 21. dxe5 Qd7 22. Qe2 Bc2 23. Nd4 Ba4 24. Reb1 Rxa5 25. f4 Ra6 26. Qe1 Rca8 27. Rb2 Bf8 28. Rab1 R6a7 29. Nb5 Ra6 30. Nd6 Bxd6 31. exd6 b5 32. f5 Qxd6 33. fxg6 hxg6 34. Qh4 e5 35. Rf1 Re8 36. Be3 f5 37. Qf2 Rc6 38. g4 f4 39. Bd2 Rc4 40. Re1 Qf6 41. Qf3 e4 42. Qxf4 Qxf4 43. Bxf4 Rxc3 44. Be3 Rf8 45. Rd2 Bb3 46. Bh6 Rff3 47. Ra1 Rg3+ 48. Rg2 Rxh3 49. g5 Ba4 50. Rf1 Rhf3 51. Rd2 Bb3 52. Ra1 Kf7 53. Ra7+ Ke6 54. Ra6+ Kf5 55. Rf6+ Kg4 56. Rxg6 Rc1+ 57. Kh2 Bc4 58. Rf6 Rh3+ 59. Kg2 Rch1 60. Rf4+ Kxf4 0-1

[Event "Schleswig Holstein-ch Seniors op 11th"]
[Site "Buesum"]
[Date "2017.09.14"]
[Round "7"]
[White "Mertens, Klaus"]
[Black "Lehr, Thomas"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "2084"]
[BlackElo "1922"]
[PlyCount "87"]
[EventDate "2017.09.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 c6 3. Bg2 Bg4 4. 0-0 Nf6 5. b3 e6 6. Bb2 Nbd7 7. d4 Bd6 8. Nbd2 0-0 9. c4 Re8 10. Ne5 Bf5 11. Ndf3 h6 12. a4 a5 13. Rc1 Qe7 14. h3 Be4 15. Nd2 Bxg2 16. Kxg2 Bb4 17. Ndf3 Ba3 18. Qc2 Bxb2 19. Qxb2 Rec8 20. c5 Nb8 21. Ne1 Na6 22. N1d3 Nd7 23. Nf3 Nf6 24. Qc3 Qc7 25. Nd2 Nd7 26. e4 Re8 27. Rfe1 Nf6 28. e5 Nd7 29. Re2 Nf8 30. Nf1 Rec8 31. Ne3 Rab8 32. Rb2 Nd7 33. b4 axb4 34. Nxb4 Ra8 35. Rcb1 Rcb8 36. Nd3 b6 37. cxb6 Nxb6 38. a5 Na4 39. Rxb8+ Nxb8 40. Qa3 Rxa5 41. Ra1 Nd7 42. Qb4 Qb6 43. Qxb6 Ndxb6 44. Rc1 1/2-1/2

[Event "Schleswig Holstein-ch Seniors op 11th"]
[Site "Buesum"]
[Date "2017.09.13"]
[Round "6"]
[White "Urbanek, Paul Gerhard"]
[Black "Mertens, Klaus"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "1927"]
[BlackElo "2084"]
[PlyCount "93"]
[EventDate "2017.09.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. d4 Nf6 4. Nf3 g6 5. Be2 Bg7 6. 0-0 0-0 7. c4 Qd8 8. Nc3 c6 9. Bf4 a5 10. h3 Na6 11. Qd2 Bf5 12. Rad1 Nc7 13. Bh6 a4 14. Bxg7 Kxg7 15. Rfe1 Qd6 16. Ne5 h6 17. Qe3 a3 18. b3 Rad8 19. Bf3 Rb8 20. c5 Qd8 21. Nc4 Ra8 22. g4 Be6 23. Nb6 Ra7 24. Bg2 Nfd5 25. Ncxd5 Bxd5 26. Nxd5 Nxd5 27. Bxd5 cxd5 28. Qc3 Qd7 29. Re5 Ra6 30. Rde1 Rf6 31. Qe3 e6 32. f4 Rh8 33. Kg2 Qd8 34. Rf1 Qa5 35. Rf3 b6 36. cxb6 Qxb6 37. f5 Rc8 38. Rf2 Qb4 39. fxe6 Rc3 40. Rxf6 Rxe3 41. Rxf7+ Kg8 42. Rxe3 Qd2+ 43. Kf3 Qd1+ 44. Kf2 Qd2+ 45. Re2 Qxd4+ 46. Kg2 Qd3 47. Rff2 1-0

[Event "Schleswig Holstein-ch Seniors op 11th"]
[Site "Buesum"]
[Date "2017.09.12"]
[Round "5"]
[White "Mertens, Klaus"]
[Black "Oechslein, Rainer"]
[Result "1/2-1/2"]
[ECO "A49"]
[WhiteElo "2084"]
[BlackElo "2294"]
[PlyCount "55"]
[EventDate "2017.09.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 c5 2. g3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Bg2 Bg7 6. c3 Nf6 7. 0-0 0-0 8. Nd2 e5 9. Nxc6 dxc6 10. Nc4 Nd5 11. e4 Ne7 12. Nd6 Be6 13. b3 b5 14. c4 Qb8 15. c5 Rd8 16. Qe1 a5 17. Be3 Nc8 18. Nxc8 Qxc8 19. Qc3 a4 20. Bf3 Bg4 21. Bxg4 Qxg4 22. f3 Qd7 23. b4 Qd3 24. Rac1 Ra7 25. Kf2 Rad7 26. Qxd3 Rxd3 27. Ke2 f5 28. Rcd1 1/2-1/2

[Event "Schleswig Holstein-ch Seniors op 11th"]
[Site "Buesum"]
[Date "2017.09.11"]
[Round "4"]
[White "Mertens, Klaus"]
[Black "Van den Berg, Ad"]
[Result "1/2-1/2"]
[ECO "A49"]
[WhiteElo "2084"]
[BlackElo "2237"]
[PlyCount "41"]
[EventDate "2017.09.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 g6 2. g3 Bg7 3. d4 Nf6 4. Bg2 0-0 5. 0-0 c6 6. b3 d6 7. Bb2 Qa5 8. Nbd2 Qh5 9. Nc4 Bh3 10. Ne3 Ng4 11. Nxg4 Bxg4 12. Re1 Nd7 13. Qd3 d5 14. Nd2 e5 15. e4 dxe4 16. Nxe4 exd4 17. Bxd4 Ne5 18. Qc3 Rad8 19. Nf6+ Bxf6 20. Bxe5 Bxe5 21. Rxe5 1/2-1/2

[Event "Schleswig Holstein-ch Seniors op 11th"]
[Site "Buesum"]
[Date "2017.09.10"]
[Round "3"]
[White "Bartsch, Berthold"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "B26"]
[WhiteElo "2259"]
[BlackElo "2084"]
[PlyCount "56"]
[EventDate "2017.09.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nc3 c5 2. e4 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. Be3 d6 7. Qd2 Nd4 8. Nd1 Rb8 9. c3 Nc6 10. f4 Nge7 11. Nf3 0-0 12. 0-0 Qc7 13. d4 b6 14. Bf2 a5 15. Ne3 a4 16. Rad1 Na5 17. Rfe1 Bb7 18. d5 exd5 19. exd5 Ba6 20. Bf1 Bxf1 21. Rxf1 Qd7 22. Nh4 b5 23. Rfe1 Nc4 24. Qc2 Nxe3 25. Bxe3 b4 26. Bc1 Bf6 27. Ng2 Nf5 28. Ne3 Nxe3 1/2-1/2

[Event "Schleswig Holstein-ch Seniors op 11th"]
[Site "Buesum"]
[Date "2017.09.09"]
[Round "2"]
[White "Mertens, Klaus"]
[Black "Gehrmann, Dorit"]
[Result "1-0"]
[ECO "E17"]
[WhiteElo "2084"]
[BlackElo "1920"]
[PlyCount "119"]
[EventDate "2017.09.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. d4 e6 5. 0-0 Be7 6. c4 0-0 7. Nc3 d6 8. b3 Nbd7 9. Bb2 Rb8 10. Qc2 c5 11. Rfd1 cxd4 12. Rxd4 d5 13. cxd5 Nxd5 14. Nxd5 exd5 15. Rad1 Bf6 16. R4d2 Qe7 17. Qf5 Bxb2 18. Rxb2 Nf6 19. Nd4 Ne4 20. Rc2 Rbc8 21. Rdc1 Rxc2 22. Rxc2 Qb4 23. Nf3 Qe7 24. Qf4 Rd8 25. Bh3 Nd6 26. Nd4 g5 27. Qd2 Ne4 28. Qe3 Re8 29. f3 Nd6 30. Qxe7 Rxe7 31. Kf2 Ba6 32. Rd2 Bb7 33. e3 h5 34. Bf5 Nxf5 35. Nxf5 Rc7 36. Nd4 a6 37. Ke2 Kf8 38. Rc2 Rxc2+ 39. Nxc2 Ke7 40. Kd3 Kd6 41. Kd4 Bc6 42. Nb4 Bb7 43. h4 f6 44. Nd3 Bc8 45. Nf2 Ke6 46. b4 Kd6 47. a3 Bd7 48. Nd1 Bc6 49. Nc3 Ke6 50. a4 b5 51. axb5 axb5 52. Kc5 d4 53. exd4 Bxf3 54. d5+ Kd7 55. Nxb5 gxh4 56. gxh4 Be4 57. Nc3 Bg2 58. b5 f5 59. Ne2 Bf1 60. Nf4 1-0

[Event "Schleswig Holstein-ch Seniors op 11th"]
[Site "Buesum"]
[Date "2017.09.08"]
[Round "1"]
[White "Harke, Horst"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "E44"]
[WhiteElo "1810"]
[BlackElo "2084"]
[PlyCount "46"]
[EventDate "2017.09.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Bb7 6. a3 Bd6 7. Nb5 Be7 8. Ng3 0-0 9. f3 d5 10. Nc3 c5 11. cxd5 Nxd5 12. e4 cxd4 13. Nxd5 exd5 14. Qxd4 Bf6 15. Qd1 dxe4 16. Qxd8 Rxd8 17. fxe4 Nd7 18. Be2 Nc5 19. 0-0 Nxe4 20. Nxe4 Bxe4 21. Bf3 Bxf3 22. Rxf3 Rd1+ 23. Kf2 Rc8 0-1

[Event "Baden Wuerttemberg-ch Seniors op 3rd"]
[Site "Freudenstadt"]
[Date "2017.07.05"]
[Round "6"]
[White "Mertens, Klaus"]
[Black "Sandmeier, Toni"]
[Result "1/2-1/2"]
[ECO "A49"]
[WhiteElo "2094"]
[BlackElo "2143"]
[PlyCount "33"]
[EventDate "2017.06.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 g6 2. g3 Bg7 3. d4 c5 4. c3 b6 5. Bg2 Bb7 6. 0-0 Nf6 7. Re1 0-0 8. Nbd2 d5 9. Ne5 Nc6 10. Ndf3 Ne4 11. Nxc6 Bxc6 12. Ne5 Bb7 13. Be3 Rc8 14. Nd3 c4 15. Ne5 f6 16. Nf3 e5 17. Qc1 1/2-1/2

[Event "Baden Wuerttemberg-ch Seniors op 3rd"]
[Site "Freudenstadt"]
[Date "2017.07.02"]
[Round "3"]
[White "Vatter, Hans Joachim"]
[Black "Mertens, Klaus"]
[Result "1-0"]
[ECO "C01"]
[WhiteElo "2193"]
[BlackElo "2094"]
[PlyCount "61"]
[EventDate "2017.06.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nf3 Nf6 4. d4 e6 5. c4 Bb4+ 6. Nc3 Bxc3+ 7. bxc3 Qa5 8. Bd2 Ne4 9. Bd3 Nxd2 10. Qxd2 Nd7 11. Rb1 c6 12. 0-0 h6 13. Rfe1 0-0 14. Ne5 Qc7 15. c5 b6 16. Ng4 f5 17. cxb6 axb6 18. Ne5 Nf6 19. Bc4 b5 20. Bb3 Qd6 21. Qd3 Nd5 22. c4 Nb4 23. Qd2 Rd8 24. Rbd1 bxc4 25. Nxc4 Qb8 26. Qe2 Nd5 27. Qh5 Qf4 28. Ne5 Ra6 29. h4 Nf6 30. Qf7+ Kh7 31. g3 1-0

[Event "GER-chA Seniors 28th"]
[Site "Niederhausen"]
[Date "2016.08.21"]
[Round "9"]
[White "Mertens, Klaus"]
[Black "Haselhorst, Helmut"]
[Result "1/2-1/2"]
[ECO "E63"]
[WhiteElo "2066"]
[BlackElo "2096"]
[PlyCount "23"]
[EventDate "2016.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. 0-0 0-0 5. d4 d6 6. c4 Nc6 7. Nc3 a6 8. Bf4 Rb8 9. c5 Nh5 10. Be3 dxc5 11. dxc5 e5 12. Qa4 1/2-1/2

[Event "GER-chA Seniors 28th"]
[Site "Niederhausen"]
[Date "2016.08.20"]
[Round "8"]
[White "Doehner, Hans Juergen"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "2146"]
[BlackElo "2066"]
[PlyCount "101"]
[EventDate "2016.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. g3 c6 6. Bf4 Qb4 7. a3 Qb6 8. b4 Bf5 9. Bg2 e6 10. Na4 Qb5 11. Nb2 Bxb4+ 12. axb4 Qxb4+ 13. Bd2 Qxb2 14. c3 Bc2 15. Qc1 Qxc1+ 16. Rxc1 Bd3 17. f3 Nbd7 18. c4 Nb6 19. Bf1 Bxf1 20. Kxf1 0-0 21. Ne2 Rfd8 22. Be3 Nc8 23. Kf2 Nd6 24. Rhd1 Rd7 25. g4 h6 26. Nf4 Nfe8 27. Nd3 f6 28. h4 Nc7 29. Bf4 Rad8 30. Rb1 b5 31. c5 Nde8 32. Bxc7 Nxc7 33. Nb4 Nd5 34. Nxc6 Rc8 35. Nxa7 Rxa7 36. Re1 Ra2+ 37. Kf1 Kf7 38. Rxb5 Rd2 39. Re4 Rc7 40. Ra5 Rb7 41. Ra1 Rb3 42. h5 Rc2 43. Ra7+ Kg8 44. Ra8+ Kh7 45. Re2 Rxf3+ 46. Kg2 Rxe2+ 47. Kxf3 Re3+ 48. Kf2 Re4 49. Ra4 Rxg4 50. c6 e5 51. dxe5 0-1

[Event "GER-chA Seniors 28th"]
[Site "Niederhausen"]
[Date "2016.08.19"]
[Round "7"]
[White "Mertens, Klaus"]
[Black "Tchetchelnitski, Boris"]
[Result "0-1"]
[ECO "A90"]
[WhiteElo "2066"]
[BlackElo "2144"]
[PlyCount "60"]
[EventDate "2016.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 f5 2. g3 Nf6 3. Bg2 e6 4. d4 d5 5. 0-0 Bd6 6. c4 c6 7. b3 Qe7 8. Bb2 0-0 9. Qc2 b6 10. Nbd2 Bb7 11. Ne5 Na6 12. Nd3 Ne4 13. Nf3 Rac8 14. Nfe5 c5 15. f3 Nf6 16. Qd2 Rfd8 17. e3 Nb4 18. dxc5 bxc5 19. a3 Nxd3 20. Qxd3 d4 21. f4 Bxg2 22. Kxg2 Bxe5 23. fxe5 Ng4 24. exd4 cxd4 25. Bxd4 Qb7+ 26. Kh3 Nxe5 27. Qe3 Nf7 28. Bxa7 g5 29. Bc5 g4+ 30. Kh4 Qg2 0-1

[Event "GER-chA Seniors 28th"]
[Site "Niederhausen"]
[Date "2016.08.18"]
[Round "6"]
[White "Kierzek, Matthias"]
[Black "Mertens, Klaus"]
[Result "1-0"]
[ECO "E16"]
[WhiteElo "2217"]
[BlackElo "2066"]
[PlyCount "59"]
[EventDate "2016.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Qe7 5. g3 b6 6. Bg2 Bb7 7. 0-0 Bxd2 8. Qxd2 0-0 9. Nc3 Ne4 10. Nxe4 Bxe4 11. Qf4 d5 12. cxd5 exd5 13. Rac1 c5 14. dxc5 bxc5 15. Qe3 Qf6 16. Qc3 Qb6 17. Ne5 Bxg2 18. Kxg2 f6 19. Qf3 Rd8 20. Nd3 Na6 21. b3 Rac8 22. Rfd1 Qc6 23. h4 Rd6 24. Nxc5 Nxc5 25. b4 Qb5 26. Rxd5 Rdc6 27. Rcxc5 Rxc5 28. Rxc5 Rxc5 29. Qa8+ Kf7 30. Qxa7+ 1-0

[Event "GER-chA Seniors 28th"]
[Site "Niederhausen"]
[Date "2016.08.17"]
[Round "5"]
[White "Herbrechtsmeier, Christof"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "D00"]
[WhiteElo "2257"]
[BlackElo "2066"]
[PlyCount "85"]
[EventDate "2016.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 d5 2. d4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 6. h3 Bh5 7. g4 Bg6 8. Ne5 Nbd7 9. Qf3 c6 10. Nxg6 hxg6 11. g5 Nd5 12. Nxd5 cxd5 13. Qxd5 Qc7 14. Qb3 e6 15. Bg2 Rb8 16. Bd2 Bd6 17. 0-0-0 Bf4 18. Rhf1 Bxd2+ 19. Rxd2 0-0 20. h4 Nb6 21. Rh1 Qc4 22. Qxc4 Nxc4 23. Rd3 Rfd8 24. b3 Nd6 25. d5 e5 26. Rdh3 Kf8 27. h5 gxh5 28. Rxh5 g6 29. Rh7 Re8 30. Rf1 Ke7 31. Rfh1 b5 32. c3 Rbc8 33. Kd2 a5 34. R1h4 Rf8 35. Be4 Rg8 36. Bd3 Rc5 37. c4 bxc4 38. Bxc4 Rgc8 39. Kd3 e4+ 40. Ke2 Nxc4 41. Rxe4+ Ne5 42. Rxe5+ Kd6 43. Re3 1/2-1/2

[Event "GER-chA Seniors 28th"]
[Site "Niederhausen"]
[Date "2016.08.16"]
[Round "4"]
[White "Mertens, Klaus"]
[Black "Schlierkamp, Ferdinand"]
[Result "0-1"]
[ECO "D11"]
[WhiteElo "2066"]
[BlackElo "2168"]
[PlyCount "139"]
[EventDate "2016.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 c6 3. Bg2 Bg4 4. d4 Nd7 5. 0-0 e6 6. b3 Ngf6 7. c4 Bd6 8. Bb2 0-0 9. Nbd2 Re8 10. Ne5 Bh5 11. Ndf3 Qe7 12. a3 Rad8 13. Qc2 Bb8 14. Rfe1 Nxe5 15. Nxe5 Nd7 16. Bf3 Nxe5 17. Bxh5 Qg5 18. f4 Qxh5 19. fxe5 c5 20. e3 Qg5 21. Qf2 Rd7 22. Rac1 Rc8 23. cxd5 Rxd5 24. Qf4 Qh5 25. e4 Rd7 26. g4 Qg6 27. Qf3 h5 28. h3 Qg5 29. Qe3 Qe7 30. gxh5 Qd8 31. Kh1 cxd4 32. Rxc8 dxe3 33. Rxd8+ Rxd8 34. Kg1 Rd3 35. b4 a6 36. Re2 Ba7 37. Kg2 Kh7 38. Bc1 Rc3 39. Bb2 Rb3 40. Bc1 Kh6 41. Kf3 Rc3 42. Bb2 Rb3 43. Kg4 Rd3 44. Bc1 Bb6 45. Rc2 Rd1 46. Rc3 Re1 47. Rc8 Kh7 48. Rc3 Rg1+ 49. Kf3 Rf1+ 50. Ke2 Rf2+ 51. Ke1 Rf3 52. h4 Rh3 53. Ke2 Kh6 54. Rc8 Kxh5 55. Rh8+ Kg6 56. Kd3 Rh1 57. Bxe3 Rd1+ 58. Ke2 Bxe3 59. Kxd1 Bd4 60. Rb8 b6 61. Ra8 Bxe5 62. Rxa6 Bd4 63. a4 Kh5 64. b5 Kxh4 65. a5 bxa5 66. b6 g5 67. b7 Be5 68. Rxa5 Bd6 69. Ra8 f5 70. b8Q 0-1

[Event "GER-chA Seniors 28th"]
[Site "Niederhausen"]
[Date "2016.08.15"]
[Round "3"]
[White "Mertens, Klaus"]
[Black "Mueller Clostermann, Bruno"]
[Result "1/2-1/2"]
[ECO "A96"]
[WhiteElo "2066"]
[BlackElo "2166"]
[PlyCount "57"]
[EventDate "2016.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 f5 2. g3 Nf6 3. Bg2 d6 4. d4 e6 5. b3 Be7 6. Bb2 0-0 7. 0-0 Qe8 8. c4 Qh5 9. e3 Nbd7 10. Nbd2 c6 11. Ne1 Qh6 12. Nd3 d5 13. Nf3 Ne4 14. Nfe5 Ndf6 15. Qe2 Bd7 16. f3 Nd6 17. Nc5 Rad8 18. Bc1 g5 19. e4 Bc8 20. exd5 cxd5 21. Bd2 Rde8 22. Ncd3 Bd8 23. a4 dxc4 24. bxc4 Qg7 25. a5 h5 26. Bb4 Bc7 27. Rfb1 a6 28. Qf2 Rd8 29. Bc5 1/2-1/2

[Event "GER-chA Seniors 28th"]
[Site "Niederhausen"]
[Date "2016.08.14"]
[Round "2"]
[White "Haubt, Georg"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "B26"]
[WhiteElo "2168"]
[BlackElo "2066"]
[PlyCount "70"]
[EventDate "2016.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. g3 Nc6 5. Bg2 g6 6. d3 Bg7 7. Be3 d6 8. Qd2 Nge7 9. Bh6 Bxh6 10. Qxh6 Ng8 11. Qd2 Nd4 12. h4 h5 13. Ng5 Rb8 14. Nd1 Nf6 15. Ne3 Ng4 16. Nxg4 hxg4 17. c3 Nc6 18. d4 cxd4 19. cxd4 e5 20. d5 Nd4 21. 0-0 f6 22. Ne6 Bxe6 23. dxe6 Qe7 24. f3 gxf3 25. Bxf3 Qxe6 26. Rac1 Rh7 27. Bg2 Kf8 28. Kh2 Kg8 29. Bh3 Qe7 30. Qa5 g5 31. Rc3 Kh8 32. Rfc1 Nc6 33. Qb6 Rg8 34. Qf2 gxh4 35. gxh4 Rh6 1/2-1/2

[Event "GER-chA Seniors 28th"]
[Site "Niederhausen"]
[Date "2016.08.13"]
[Round "1"]
[White "Mertens, Klaus"]
[Black "Trefzer, Erhard"]
[Result "1-0"]
[ECO "A96"]
[WhiteElo "2066"]
[BlackElo "1839"]
[PlyCount "121"]
[EventDate "2016.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. Nf3 f5 2. g3 Nf6 3. c4 e6 4. Bg2 Be7 5. 0-0 0-0 6. d4 d6 7. b3 Qe8 8. Bb2 Nbd7 9. Qc2 Ne4 10. Nfd2 Nxd2 11. Nxd2 e5 12. e4 f4 13. Nf3 fxg3 14. fxg3 Bf6 15. d5 a5 16. a3 b6 17. b4 Nb8 18. c5 bxc5 19. bxc5 Na6 20. cxd6 cxd6 21. Nd2 Bd7 22. Rf3 Nc5 23. Nc4 Qb8 24. Bc3 Ba4 25. Qb1 Nb3 26. Ra2 Qa7+ 27. Kh1 Qc5 28. Bf1 Be7 29. Raf2 Nd4 30. Rxf8+ Bxf8 31. Qb7 Qa7 32. Qxa7 Rxa7 33. Bxa5 Bc2 34. Bb4 Bxe4+ 35. Bg2 Bxg2+ 36. Kxg2 Ra6 37. Nxe5 Ra8 38. Nc4 Nb5 39. Kf1 Nc7 40. Rd2 Ne8 41. Ke2 Ra6 42. Kd3 Kf7 43. Rf2+ Ke7 44. Na5 Nf6 45. Kc4 Kd7 46. Re2 Ne8 47. Nc6 Ra8 48. Ba5 Nf6 49. h3 Rc8 50. Rc2 Re8 51. Nb4 Ne4 52. Kb5 Nc5 53. Bb6 Re3 54. a4 Rxg3 55. a5 Rb3 56. Rc4 Rxh3 57. a6 Ra3 58. a7 Be7 59. Ba5 Rxa5+ 60. Kxa5 Bd8+ 61. Kb5 1-0

[Event "Rhein Main op-A 19th"]
[Site "Bad Homburg"]
[Date "2016.05.29"]
[Round "7"]
[White "Mertens, Klaus"]
[Black "Gutacker, Stephan"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "2072"]
[BlackElo "1868"]
[PlyCount "151"]
[EventDate "2016.05.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 d5 3. d4 Bf5 4. Bg2 c6 5. 0-0 h6 6. c4 e6 7. b3 Bd6 8. Bb2 0-0 9. Nbd2 Nbd7 10. Re1 Re8 11. Ne5 c5 12. Ndf3 cxd4 13. Nxd7 Qxd7 14. Nxd4 Be4 15. Nb5 Bxg2 16. Nxd6 Qxd6 17. Kxg2 Qc6 18. cxd5 Nxd5 19. e4 Nf6 20. Bxf6 gxf6 21. Rc1 Qb5 22. Rc7 Rac8 23. Qg4+ Kf8 24. Rec1 Rxc7 25. Rxc7 Re7 26. Rc4 Qe5 27. Qd1 Qb8 28. Rc5 e5 29. Rd5 Re8 30. Qh5 Kg7 31. Rd7 Rf8 32. Qg4+ Kh8 33. Qf5 Kg7 34. Qg4+ Kh8 35. Qf5 Kg7 36. Qe6 b5 37. Qd5 Qa8 38. Rxf7+ Kg6 39. Rxf8 Qxf8 40. Qxb5 Qa3 41. Qe2 a5 42. h4 h5 43. Qc2 Kh6 44. f3 Kg6 45. Kh3 Qd6 46. Kg2 Qd7 47. a3 Kg7 48. b4 axb4 49. axb4 Qb5 50. Qb2 Kg6 51. Kf2 Qb6+ 52. Kf1 Qe3 53. Qe2 Qb3 54. b5 Kg7 55. Kf2 Kg6 56. Kg2 Kg7 57. f4 exf4 58. gxf4 Qb4 59. f5 Kh6 60. Qe3+ Kg7 61. b6 Kh7 62. Kh3 Qb1 63. Kg2 Qc2+ 64. Kf3 Qd1+ 65. Qe2 Qh1+ 66. Ke3 Qc1+ 67. Kd4 Qa1+ 68. Kc5 Qa3+ 69. Kc6 Qa8+ 70. Kc7 Qe8 71. Qc4 Qe7+ 72. Kc8 Qe8+ 73. Kb7 Kh6 74. Qc1+ Kh7 75. Qc6 Qe5 76. Qc7+ 1-0

[Event "Rhein Main op-A 19th"]
[Site "Bad Homburg"]
[Date "2016.05.28"]
[Round "5"]
[White "Mertens, Klaus"]
[Black "Busch, Florian"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "2072"]
[BlackElo "1949"]
[PlyCount "29"]
[EventDate "2016.05.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 d5 3. d4 c6 4. Bg2 Bf5 5. 0-0 e6 6. c4 dxc4 7. Ne5 Nbd7 8. Nxc4 Nb6 9. Nba3 Be4 10. f3 Bd5 11. Ne5 Bxa3 12. bxa3 Nfd7 13. Nd3 Qf6 14. Nf4 0-0 15. Nxd5 1/2-1/2

[Event "Rhein Main op-A 19th"]
[Site "Bad Homburg"]
[Date "2016.05.28"]
[Round "6"]
[White "Sigurdsson, Snorri Thor"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "1915"]
[BlackElo "2072"]
[PlyCount "68"]
[EventDate "2016.05.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 b6 3. e3 Bb7 4. Nf3 g6 5. Be2 Bg7 6. 0-0 0-0 7. h3 d6 8. Nbd2 c5 9. c3 Nbd7 10. Re1 Qc7 11. Rc1 Rac8 12. Bh2 a6 13. b4 Qb8 14. bxc5 bxc5 15. Rb1 Qa7 16. Ng5 h6 17. Ngf3 cxd4 18. cxd4 Rc3 19. Qa4 Rfc8 20. Qb4 Bd5 21. a4 a5 22. Qb5 Rb8 23. Qa6 Qxa6 24. Bxa6 Ra8 25. Bb7 Bxb7 26. Rxb7 Ra3 27. e4 e5 28. Nc4 Rxa4 29. Nxd6 Bf8 30. Nxf7 exd4 31. e5 Nc5 32. Rc7 Ne6 33. Nxh6+ Kh8 34. Nf7+ Kg8 1/2-1/2

[Event "Rhein Main op-A 19th"]
[Site "Bad Homburg"]
[Date "2016.05.27"]
[Round "4"]
[White "Henrich, David"]
[Black "Mertens, Klaus"]
[Result "1-0"]
[ECO "A25"]
[WhiteElo "2159"]
[BlackElo "2072"]
[PlyCount "53"]
[EventDate "2016.05.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nf6 3. Bg2 Nc6 4. Nc3 Bc5 5. d3 h6 6. e3 d6 7. a3 a5 8. Nge2 0-0 9. 0-0 Bf5 10. h3 Qd7 11. g4 Bh7 12. d4 Ba7 13. b4 Bb8 14. b5 Nd8 15. Bb2 Qe6 16. d5 Qe8 17. Ng3 Nd7 18. Be4 Nc5 19. Bxh7+ Kxh7 20. Qc2+ g6 21. Rae1 Qe7 22. f4 f6 23. fxe5 dxe5 24. Nce4 Ba7 25. Nxc5 Bxc5 26. Ne4 Bd6 27. c5 1-0

[Event "Rhein Main op-A 19th"]
[Site "Bad Homburg"]
[Date "2016.05.26"]
[Round "3"]
[White "Mertens, Klaus"]
[Black "Schmid, Roland"]
[Result "1/2-1/2"]
[ECO "A90"]
[WhiteElo "2072"]
[BlackElo "2306"]
[PlyCount "128"]
[EventDate "2016.05.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 e6 3. g3 Bd6 4. Bg2 f5 5. c4 c6 6. b3 Nf6 7. 0-0 Qe7 8. Bb2 b6 9. Ne5 Bb7 10. Nd2 0-0 11. Rc1 a5 12. Ndf3 Ne4 13. Nd3 Nd7 14. Nfe5 Rac8 15. Nxd7 Qxd7 16. f3 Nf6 17. c5 bxc5 18. Nxc5 Bxc5 19. Rxc5 Qc7 20. Qd2 Ra8 21. Bc3 a4 22. Ba5 Qb8 23. b4 Nd7 24. Rc3 e5 25. e3 Ba6 26. Rfc1 Bb5 27. Bf1 Rf6 28. a3 h5 29. Bxb5 Qxb5 30. Qd3 Qb7 31. f4 exd4 32. exd4 Re8 33. b5 Qxb5 34. Qxb5 cxb5 35. Rc7 Rf7 36. Rb7 Nf6 37. Rxb5 Re2 38. Re1 Ra2 39. Bb4 Ng4 40. Re8+ Kh7 41. Rxd5 Nxh2 42. Rdd8 Nf3+ 43. Kf1 Rc7 44. Rh8+ Kg6 45. Rd6+ Kf7 46. Rf8+ Kxf8 47. Rd7+ Kg8 48. Rxc7 Nxd4 49. Ra7 Nc6 50. Ra8+ Kf7 51. Rxa4 Nxb4 52. Rxb4 Rxa3 53. Kg2 Kg6 54. Rb6+ Kh7 55. Rb5 g6 56. Rb6 Kh6 57. Kh3 Ra1 58. Rc6 h4 59. g4 Ra3+ 60. Kxh4 Rf3 61. Rc4 Rxf4 62. Rxf4 g5+ 63. Kg3 gxf4+ 64. Kxf4 fxg4 1/2-1/2

[Event "Rhein Main op-A 19th"]
[Site "Bad Homburg"]
[Date "2016.05.26"]
[Round "2"]
[White "Zalewski, Ulrich"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "B41"]
[WhiteElo "1829"]
[BlackElo "2072"]
[PlyCount "126"]
[EventDate "2016.05.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Qc7 6. Be2 Nf6 7. Nc3 Bb4 8. Qd3 Nc6 9. f4 Nxd4 10. Qxd4 Bc5 11. Qd3 d6 12. Be3 Bd7 13. Rd1 Ke7 14. Bxc5 Qxc5 15. Qd4 Qxd4 16. Rxd4 Bc6 17. Bf3 Rac8 18. 0-0 e5 19. fxe5 dxe5 20. Rd2 Rhd8 21. Rfd1 Rxd2 22. Rxd2 b6 23. Kf2 Bd7 24. b3 b5 25. Nd5+ Nxd5 26. cxd5 Kd6 27. Ke3 f5 28. Rd3 g6 29. h3 Rc2 30. Rd2 Rxd2 31. Kxd2 fxe4 32. Bxe4 Bc8 33. a4 bxa4 34. bxa4 Bb7 35. h4 a5 36. g4 Bxd5 37. Bc2 e4 38. Ke3 Ke5 39. Bd1 h6 40. Bc2 g5 41. hxg5 hxg5 42. Bb1 Bb3 43. Bxe4 Bxa4 44. Bf5 Bb5 45. Kd2 Kd4 46. Kc2 Kc4 47. Kb2 Kb4 48. Ka1 Bc4 49. Bd7 Kc5 50. Kb2 Kd6 51. Bc8 Be6 52. Bb7 Bxg4 53. Ka3 Bd7 54. Bf3 Ke5 55. Kb3 Kf4 56. Bh5 Bg4 57. Be8 Bd1+ 58. Kc3 g4 59. Kd2 g3 60. Ke1 a4 61. Bc6 a3 62. Bd5 Bf3 63. Be6 Ke3 0-1

[Event "Rhein Main op-A 19th"]
[Site "Bad Homburg"]
[Date "2016.05.25"]
[Round "1"]
[White "Mertens, Klaus"]
[Black "Riese, Manfred"]
[Result "1/2-1/2"]
[ECO "A49"]
[WhiteElo "2072"]
[BlackElo "1850"]
[PlyCount "69"]
[EventDate "2016.05.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. Nf3 d6 2. d4 Nf6 3. g3 g6 4. Bg2 Bg7 5. 0-0 0-0 6. b3 c6 7. Bb2 Bg4 8. c4 Qc8 9. Nbd2 Bh3 10. Qc2 Bxg2 11. Kxg2 Nbd7 12. Rad1 Qc7 13. a3 Rac8 14. b4 a5 15. Nb3 a4 16. Nc1 b5 17. Nd3 Nb6 18. Nd2 Qb7 19. c5 Nbd7 20. Rfe1 Rfe8 21. e4 Qc7 22. Nf3 d5 23. exd5 Nxd5 24. Nde5 Rcd8 25. Nxd7 Rxd7 26. Ne5 Rdd8 27. Qe4 e6 28. Rd3 Re7 29. Rf3 Rf8 30. Qh4 Ree8 31. Bc1 f6 32. Nd3 g5 33. Qh5 Qf7 34. Qxf7+ Rxf7 35. Nb2 1/2-1/2

[Event "Arber op Seniors 3rd"]
[Site "Bayerisch Eisenstein"]
[Date "2015.08.09"]
[Round "9"]
[White "Mertens, Klaus"]
[Black "Block, Wolfgang"]
[Result "1/2-1/2"]
[ECO "A49"]
[WhiteElo "2054"]
[BlackElo "2084"]
[PlyCount "12"]
[EventDate "2015.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 g6 3. g3 Bg7 4. Bg2 d6 5. 0-0 0-0 6. b3 Bg4 1/2-1/2

[Event "Arber op Seniors 3rd"]
[Site "Bayerisch Eisenstein"]
[Date "2015.08.08"]
[Round "8"]
[White "Selig, Rainer"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "A47"]
[WhiteElo "2133"]
[BlackElo "2054"]
[PlyCount "111"]
[EventDate "2015.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 b6 3. e3 Bb7 4. Bd3 e6 5. Nbd2 c5 6. 0-0 Nc6 7. b3 Nb4 8. Be2 Be7 9. a3 Nbd5 10. Bb2 0-0 11. c4 Nc7 12. Qc2 d5 13. Ne5 Rc8 14. dxc5 Bxc5 15. Bf3 a5 16. Rfd1 Qe7 17. h3 Rfd8 18. Nf1 Nce8 19. Ng3 Nd6 20. cxd5 Bxd5 21. Bxd5 Nxd5 22. Qe2 b5 23. Rdc1 f6 24. Nd3 Bb6 25. e4 Nc7 26. e5 Nf5 27. Nxf5 exf5 28. Nf4 fxe5 29. Bxe5 Bc5 30. Qb2 Bd6 31. Re1 Re8 32. Nd3 Qd7 33. f4 Ne6 34. Rad1 Qc6 35. Kh1 Bf8 36. Rc1 Qd5 37. Rcd1 Qc6 38. Rd2 Red8 39. Red1 Qe4 40. Nf2 Rxd2 41. Qxd2 Qc6 42. a4 b4 43. Qd5 Qxd5 44. Rxd5 Nc5 45. Nd1 Nxb3 46. Ne3 g6 47. Rb5 Rc5 48. Rb7 Nd2 49. Rd7 Ne4 50. g4 b3 51. gxf5 Ng3+ 52. Kg2 Nxf5 53. Kf2 Nxe3 54. Kxe3 Rc4 55. Ra7 Rxa4 56. Rb7 0-1

[Event "Arber op Seniors 3rd"]
[Site "Bayerisch Eisenstein"]
[Date "2015.08.06"]
[Round "6"]
[White "Schmid, Siegfried"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "B14"]
[WhiteElo "2141"]
[BlackElo "2054"]
[PlyCount "23"]
[EventDate "2015.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. cxd4 e6 6. Nf3 d6 7. Be2 Nc6 8. exd6 Bxd6 9. Nc3 Bb4 10. Bd2 0-0 11. 0-0 Ba5 12. Qb3 1/2-1/2

[Event "Arber op Seniors 3rd"]
[Site "Bayerisch Eisenstein"]
[Date "2015.08.04"]
[Round "5"]
[White "Mertens, Klaus"]
[Black "Haase, Georg"]
[Result "1-0"]
[ECO "A14"]
[WhiteElo "2054"]
[BlackElo "1860"]
[PlyCount "67"]
[EventDate "2015.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. g3 c6 4. Bg2 d5 5. b3 Be7 6. Bb2 0-0 7. 0-0 a5 8. a3 Nbd7 9. Qc2 b5 10. d3 Bb7 11. Nbd2 Rc8 12. e4 bxc4 13. dxc4 Nxe4 14. Nxe4 dxe4 15. Qxe4 Qc7 16. Ne5 Nf6 17. Qe3 c5 18. Rad1 Bxg2 19. Kxg2 Rfd8 20. Qf3 Bd6 21. Rfe1 Bf8 22. Bc3 Rd6 23. Nd3 Qc6 24. Qxc6 Rdxc6 25. Ne5 Ra6 26. Re3 a4 27. bxa4 Rxa4 28. Bb2 h6 29. Kf3 Rb8 30. Rd2 Ra6 31. Red3 Kh7 32. Nxf7 Rab6 33. Be5 R8b7 34. Nd6 1-0

[Event "Arber op Seniors 3rd"]
[Site "Bayerisch Eisenstein"]
[Date "2015.08.03"]
[Round "4"]
[White "Zilch, Lothar"]
[Black "Mertens, Klaus"]
[Result "1-0"]
[ECO "A35"]
[WhiteElo "1955"]
[BlackElo "2054"]
[PlyCount "87"]
[EventDate "2015.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. c4 c5 2. Nc3 Nc6 3. Nf3 g6 4. e3 Bg7 5. d4 cxd4 6. exd4 d6 7. Be2 Nf6 8. 0-0 0-0 9. h3 Bf5 10. Be3 Rc8 11. Qd2 Na5 12. b3 d5 13. Ne5 dxc4 14. bxc4 Ne4 15. Nxe4 Bxe4 16. f3 Bf5 17. Rac1 b6 18. Rfd1 h5 19. c5 bxc5 20. Ba6 Rb8 21. Rxc5 Nb7 22. Nc6 Qc7 23. Bxb7 Rxb7 24. Na5 Qb8 25. Nxb7 Qxb7 26. Rdc1 Re8 27. Rc7 Qa8 28. Qb4 Bf6 29. Qb7 a6 30. R1c6 Qxb7 31. Rxb7 Bd3 32. Rcc7 Rd8 33. g4 hxg4 34. fxg4 Bxd4 35. Bxd4 Rxd4 36. Rxe7 Bc4 37. Re8+ Kg7 38. g5 Rd1+ 39. Kh2 Rd2+ 40. Kg3 Rd3+ 41. Kf4 Rd4+ 42. Ke3 Rd3+ 43. Kf2 Bd5 44. Rbb8 1-0

[Event "Arber op Seniors 3rd"]
[Site "Bayerisch Eisenstein"]
[Date "2015.08.02"]
[Round "2"]
[White "Mertens, Klaus"]
[Black "Mlynek, Petr"]
[Result "1/2-1/2"]
[ECO "D30"]
[WhiteElo "2054"]
[BlackElo "2197"]
[PlyCount "41"]
[EventDate "2015.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 c6 3. c4 e6 4. Qc2 dxc4 5. Qxc4 b5 6. Qc2 Bb7 7. Nc3 Nf6 8. Bg5 Be7 9. e3 h6 10. Bh4 Nbd7 11. Be2 Rc8 12. 0-0 0-0 13. Rfd1 b4 14. Na4 Qa5 15. Bxf6 Bxf6 16. Nc5 Nxc5 17. dxc5 Rfd8 18. Nd2 Ba6 19. Nb3 Qa4 20. Bf3 Qb5 21. Rac1 1/2-1/2

[Event "Arber op Seniors 3rd"]
[Site "Bayerisch Eisenstein"]
[Date "2015.08.02"]
[Round "3"]
[White "Riedl, Maximilian"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "D03"]
[WhiteElo "2019"]
[BlackElo "2054"]
[PlyCount "98"]
[EventDate "2015.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 d5 5. e3 0-0 6. Bd3 b6 7. Qe2 Bb7 8. 0-0 Ne4 9. Bf4 Nd7 10. c3 Re8 11. h3 a6 12. Rfe1 c5 13. Bc2 Rc8 14. Nxe4 dxe4 15. Nh2 e5 16. dxe5 Nxe5 17. Rad1 Qe7 18. Ng4 Rcd8 19. Nxe5 Bxe5 20. Bxe5 Qxe5 21. Rd2 b5 22. Red1 Qe7 23. a4 Bc6 24. a5 Rc8 25. Rd6 Red8 26. Qd2 Rxd6 27. Qxd6 Kf8 28. b4 Qxd6 29. Rxd6 cxb4 30. cxb4 Ke7 31. Rd4 f5 32. g4 Bd7 33. Bd1 Rc1 34. Kh2 Be6 35. f3 Rc3 36. gxf5 gxf5 37. fxe4 Rxe3 38. exf5 Bxf5 39. Bg4 Bxg4 40. Rxg4 Kf6 41. Rh4 Kg6 42. Rd4 Rb3 43. Rd6+ Kg5 44. Rxa6 Rxb4 45. Rb6 h5 46. a6 Kh4 47. a7 Rb2+ 48. Kg1 Ra2 49. Rxb5 Rxa7 1/2-1/2

[Event "Arber op Seniors 3rd"]
[Site "Bayerisch Eisenstein"]
[Date "2015.08.01"]
[Round "1"]
[White "Mertens, Klaus"]
[Black "Sagner, Guenter"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "2054"]
[BlackElo "1751"]
[PlyCount "47"]
[EventDate "2015.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. g3 c5 4. Bg2 Nc6 5. 0-0 d5 6. b3 d4 7. d3 e5 8. Na3 a6 9. Nc2 Bd6 10. a3 Rb8 11. Bd2 b5 12. Ng5 Qc7 13. Ne4 Nxe4 14. Bxe4 bxc4 15. bxc4 Bh3 16. Re1 Ne7 17. e3 g6 18. exd4 cxd4 19. Nb4 Bxb4 20. axb4 Bc8 21. Qa4+ Qd7 22. Bg5 Qxa4 23. Rxa4 Rf8 24. Bf6 1-0

[Event "Hessen-ch op-A"]
[Site "Frankfurt Sossenheim"]
[Date "2015.??.??"]
[Round "3"]
[White "Diez, Gerhard"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "1994"]
[BlackElo "2058"]
[PlyCount "76"]
[EventDate "2015.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. d4 cxd4 5. Nxd4 Qc7 6. Bd3 Nf6 7. 0-0 Bc5 8. Nb3 Be7 9. f4 d6 10. Qf3 Nbd7 11. a4 b6 12. Bd2 Bb7 13. Rae1 g6 14. Qh3 h5 15. Kh1 Nc5 16. Nxc5 dxc5 17. b3 0-0-0 18. Nd5 Nxd5 19. exd5 Rxd5 20. Bc3 Rhd8 21. Bc4 Rf5 22. Qe3 Bd6 23. Qe2 Bxf4 24. Bxa6 Bxh2 25. Rxf5 gxf5 26. Bxb7+ Kxb7 27. Qxh5 Bg3 28. Qf3+ Ka7 29. Ra1 Be5 30. a5 b5 31. a6 Bxc3 32. Qxc3 Rd4 33. Qe1 Qc6 34. Kg1 Qe4 35. Qf2 Qf4 36. Qe2 Rd2 37. Qf3 Qxf3 38. gxf3 Rxc2 0-1

[Event "Hessen-ch op-A"]
[Site "Frankfurt Sossenheim"]
[Date "2015.??.??"]
[Round "5"]
[White "Kellerwessel, Ralf"]
[Black "Mertens, Klaus"]
[Result "1-0"]
[ECO "B20"]
[WhiteElo "1963"]
[BlackElo "2058"]
[PlyCount "95"]
[EventDate "2015.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. Bc4 a6 4. d3 Nc6 5. f4 b5 6. Bb3 Nd4 7. Nf3 Nxb3 8. axb3 Bb7 9. 0-0 Ne7 10. Qe1 Nc6 11. Be3 Rc8 12. Qf2 Nb4 13. f5 exf5 14. Bg5 Be7 15. Bxe7 Qxe7 16. Nh4 f4 17. Nf5 Qf6 18. Qxf4 0-0 19. e5 Qe6 20. Qg5 g6 21. Nh6+ Kh8 22. Rf6 Qe7 23. Raf1 Nd5 24. Nxd5 Bxd5 25. Qf4 Rce8 26. Ng4 Be6 27. Ne3 Rd8 28. b4 cxb4 29. d4 d5 30. Qh6 Rg8 31. Ng4 Rg7 32. Qf4 Rc8 33. Rf2 a5 34. Nh6 Rc7 35. Qe3 a4 36. Qd3 Rb7 37. Qf3 Ra7 38. Qd3 Rb7 39. Qe3 Rb8 40. R2f3 Ra8 41. Qe2 a3 42. Rf1 a2 43. Ra1 b3 44. cxb3 Qb4 45. Qe3 Bf5 46. Nxf7+ Rxf7 47. Rxf7 Bb1 48. e6 1-0

[Event "Hessen-ch op-A"]
[Site "Frankfurt Sossenheim"]
[Date "2015.??.??"]
[Round "1"]
[White "Mamerow, Marvin Stephan"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "B43"]
[WhiteElo "1935"]
[BlackElo "2058"]
[PlyCount "118"]
[EventDate "2015.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be2 b5 7. 0-0 Bb7 8. f3 Nc6 9. Be3 Bc5 10. Kh1 Nxd4 11. Bxd4 Nf6 12. e5 Nd5 13. Ne4 Be7 14. Qd2 0-0 15. Rac1 f5 16. c4 bxc4 17. Bxc4 Qb8 18. Nc3 Nxc3 19. Bxc3 Bc6 20. Rfd1 Qb7 21. Qd3 Rf7 22. Rb1 g5 23. Qe2 h5 24. b4 g4 25. f4 Be4 26. Bd3 Bd5 27. Bd4 h4 28. Kg1 Rg7 29. Rdc1 h3 30. g3 Bf3 31. Qf2 Bc6 32. Rc2 Ba4 33. Rc3 Rf7 34. a3 Rff8 35. Rbc1 Rfc8 36. Qe2 Rxc3 37. Bxc3 Bb5 38. Rd1 Qb6+ 39. Qf2 Qc6 40. Bb2 Rc8 41. Bxb5 Qxb5 42. Qd2 Rc7 43. Qd3 Qb6+ 44. Bd4 Qc6 45. Rd2 Kf7 46. Bb2 Ke8 47. Qe2 Kd8 48. Rd1 Kc8 49. Rc1 Qb6+ 50. Kf1 Rxc1+ 51. Bxc1 Qc6 52. Be3 Kb7 53. Ke1 d5 54. Qd3 Bd8 55. Kd2 Bb6 56. Bd4 Bd8 57. Qc3 a5 58. Qd3 axb4 59. axb4 Qa4 1/2-1/2

[Event "Hessen-ch op-A"]
[Site "Frankfurt Sossenheim"]
[Date "2015.??.??"]
[Round "6"]
[White "Mertens, Klaus"]
[Black "Hillgaertner, Walter"]
[Result "1/2-1/2"]
[ECO "A12"]
[WhiteElo "2058"]
[BlackElo "1922"]
[PlyCount "100"]
[EventDate "2015.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. 0-0 Bf5 5. c4 e6 6. b3 h6 7. Bb2 Be7 8. d3 0-0 9. Nbd2 Bh7 10. a3 Nbd7 11. Qc2 Ne8 12. b4 Bf6 13. Rfc1 Bxb2 14. Qxb2 Qf6 15. d4 Qe7 16. b5 Nd6 17. cxd5 cxd5 18. Qb4 Rfc8 19. Nb3 Qf8 20. Na5 Rab8 21. Nd2 Nb6 22. Bf1 Qd8 23. e3 Ne4 24. Nxe4 Bxe4 25. Nb3 Nd7 26. Qd6 Nb6 27. Qxd8+ Rxd8 28. Nc5 Bf5 29. Rc3 Nd7 30. Rac1 Nxc5 31. dxc5 e5 32. c6 bxc6 33. bxc6 Rdc8 34. c7 Rb6 35. Rc6 Rxc6 36. Rxc6 Re8 37. Ba6 Bc8 38. Kf1 Kf8 39. Bb5 Re6 40. Rc5 Rd6 41. Ke1 Ke7 42. e4 dxe4 43. Rxe5+ Re6 44. Rd5 Rd6 45. Rc5 Rb6 46. Rd5 Rd6 47. Re5+ Re6 48. Rd5 Rd6 49. Re5+ Re6 50. Rd5 Rd6 1/2-1/2

[Event "Hessen-ch op-A"]
[Site "Frankfurt Sossenheim"]
[Date "2015.??.??"]
[Round "2"]
[White "Mertens, Klaus"]
[Black "Kolker, Vladislav"]
[Result "1/2-1/2"]
[ECO "E63"]
[WhiteElo "2058"]
[BlackElo "2013"]
[PlyCount "34"]
[EventDate "2015.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 0-0 5. Nc3 d6 6. d4 Nc6 7. 0-0 a6 8. b3 e5 9. d5 Ne7 10. Bb2 Nh5 11. e4 f5 12. Ng5 Bf6 13. Ne6 Bxe6 14. dxe6 f4 15. Nd5 c6 16. Nxe7+ Bxe7 17. c5 Ng7 1/2-1/2

[Event "Hessen-ch op-A"]
[Site "Frankfurt Sossenheim"]
[Date "2015.??.??"]
[Round "4"]
[White "Mertens, Klaus"]
[Black "Nagelsdiek, Ralf"]
[Result "0-1"]
[ECO "A15"]
[WhiteElo "2058"]
[BlackElo "2009"]
[PlyCount "100"]
[EventDate "2015.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 0-0 5. 0-0 Nc6 6. d4 a6 7. b3 d5 8. Bb2 Bf5 9. Nbd2 Ne4 10. cxd5 Nxd2 11. Nxd2 Nxd4 12. Nc4 c5 13. e3 b5 14. Ne5 Bxe5 15. exd4 Bf6 16. Qd2 c4 17. bxc4 bxc4 18. Rfc1 Bd3 19. Bc3 Rc8 20. Re1 Qb6 21. Qe3 Rfd8 22. Qf4 Rb8 23. h4 Qd6 24. Qc1 Rb5 25. Qe3 Rdb8 26. Qd2 Qa3 27. Bf3 Rb1 28. Kg2 Rxa1 29. Rxa1 h5 30. Re1 Rb1 31. Rxb1 Bxb1 32. Bb4 Qxa2 33. Qe3 Qb3 34. Qe1 Bf5 35. d6 e6 36. d7 Bh3+ 37. Kxh3 Qxf3 38. Kh2 Qd5 39. Qc3 Bxd4 40. Qxc4 Qxd7 41. Qxa6 Bxf2 42. Qa8+ Kh7 43. Qe4 Qd1 44. Qg2 Bd4 45. Be7 e5 46. Kh3 Bg1 47. Qe4 Qf1+ 48. Qg2 Qf5+ 49. g4 Qd3+ 50. Qg3 Qf1+ 0-1

[Event "Hessen-ch op-A"]
[Site "Frankfurt Sossenheim"]
[Date "2015.??.??"]
[Round "7"]
[White "Weil, Michael"]
[Black "Mertens, Klaus"]
[Result "0-1"]
[ECO "A47"]
[WhiteElo "1998"]
[BlackElo "2058"]
[PlyCount "146"]
[EventDate "2015.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 b6 3. e3 Bb7 4. Bd3 g6 5. Nbd2 Bg7 6. 0-0 0-0 7. b3 d5 8. Bb2 c5 9. Ne5 Nc6 10. f4 cxd4 11. exd4 e6 12. a3 Ne7 13. Qf3 Nc8 14. Rae1 Nd6 15. Qe2 Nfe4 16. c4 Rc8 17. Rc1 f6 18. Nef3 Qd7 19. Rc2 Rc7 20. Rfc1 Rfc8 21. g3 Kf7 22. Kg2 Nxd2 23. Rxd2 dxc4 24. bxc4 Qc6 25. d5 exd5 26. cxd5 Qd7 27. Rxc7 Rxc7 28. Kf2 Rc5 29. Bd4 Rxd5 30. Bb1 Ra5 31. Bb2 Qe7 32. Qd1 Bf8 33. h4 Ne4+ 34. Bxe4 Qxe4 35. Rd7+ Be7 36. Qe2 Qxe2+ 37. Kxe2 Bc6 38. Rd2 Bxa3 39. Bc3 Rc5 40. Bd4 Bxf3+ 41. Kxf3 Rd5 42. Ke4 Ke6 43. Ra2 f5+ 44. Ke3 Bc1+ 45. Kd3 a5 46. Rc2 Ba3 47. Rc6+ Kd7 48. Rxb6 Bc5 49. Rb7+ Kc6 50. Rxh7 Rxd4+ 51. Kc2 Rd6 52. h5 gxh5 53. Rxh5 Rf6 54. Rg5 Kb5 55. Kb3 a4+ 56. Kc3 Bb4+ 57. Kb2 Kc4 58. g4 fxg4 59. Rxg4 Rf5 60. Rh4 Bc5 61. Ka2 Kb4 62. Rg4 Bf2 63. Rg8 Rxf4 64. Rb8+ Kc4 65. Rc8+ Kb5 66. Rb8+ Bb6 67. Ka3 Rf3+ 68. Ka2 a3 69. Ra8 Bc5 70. Rb8+ Kc4 71. Rc8 Rf7 72. Ka1 Kb3 73. Rb8+ Bb4 0-1

[Event "GER-chA Seniors 26th"]
[Site "Bad Neuenahr"]
[Date "2014.08.13"]
[Round "9"]
[White "Boettcher, Ulrich"]
[Black "Mertens, Klaus"]
[Result "1/2-1/2"]
[ECO "A39"]
[WhiteElo "2078"]
[BlackElo "2032"]
[PlyCount "42"]
[EventDate "2014.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. e4 d6 5. g3 g6 6. Bg2 Bg7 7. 0-0 0-0 8. d4 cxd4 9. Nxd4 Nxd4 10. Qxd4 a6 11. Qd3 Qc7 12. Bg5 h6 13. Be3 Kh7 14. h3 Be6 15. b3 Rac8 16. Rac1 b6 17. Rfd1 Rfd8 18. Nd5 Bxd5 19. exd5 a5 20. Kh2 Nd7 21. g4 Nc5 1/2-1/2

[Event "GER-chA Seniors 26th"]
[Site "Bad Neuenahr"]
[Date "2014.08.12"]
[Round "8"]
[White "Mertens, Klaus"]
[Black "Denda, Ronald"]
[Result "1/2-1/2"]
[ECO "A13"]
[WhiteElo "2032"]
[BlackElo "1991"]
[PlyCount "38"]
[EventDate "2014.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. c4 e6 2. g3 d5 3. Bg2 Nf6 4. Nf3 Nbd7 5. b3 Bd6 6. Bb2 c6 7. 0-0 0-0 8. d3 e5 9. cxd5 cxd5 10. Nc3 a6 11. Nh4 Nb6 12. Qd2 Bd7 13. d4 e4 14. f3 exf3 15. exf3 Re8 16. Rae1 Qc7 17. a3 Rxe1 18. Rxe1 Re8 19. Rxe8+ Nxe8 1/2-1/2

