[Event "Niedersachsen-ch"]
[Site "Lueneburg"]
[Date "1956.03.31"]
[Round "12"]
[White "Mercker, Goetz"]
[Black "Markwardt, Karl"]
[Result "1-0"]
[ECO "A21"]
[PlyCount "80"]
[EventDate "1956.03.24"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 d6 3. e3 f5 4. d4 Be7 5. Qh5+ g6 6. Qd1 Nf6 7. Nf3 e4 8. Nd2 0-0 9. Be2 Nc6 10. b3 a6 11. Bb2 Rb8 12. 0-0 Bd7 13. f3 exf3 14. Nxf3 d5 15. a4 Nb4 16. Ne5 Be6 17. Qd2 a5 18. Rac1 c6 19. Ba3 Bd6 20. Nf3 Re8 21. c5 Bc7 22. Bxb4 axb4 23. Na2 Bc8 24. Ne1 Ne4 25. Qd3 Qh4 26. Nf3 Qh6 27. Ne5 Rxe5 28. dxe5 Bxe5 29. g3 Be6 30. Rc2 Rd8 31. Bf3 Ng5 32. Bg2 Qf8 33. Nxb4 d4 34. e4 Qg7 35. Re2 fxe4 36. Bxe4 Nxe4 37. Qxe4 Bxb3 38. Qxe5 Qxe5 39. Rxe5 Bxa4 40. Rf2 Bb3 1-0

[Event "Niedersachsen-ch"]
[Site "Lueneburg"]
[Date "1956.03.29"]
[Round "8"]
[White "Mercker, Goetz"]
[Black "Stern, Dieter Max"]
[Result "0-1"]
[ECO "D51"]
[PlyCount "80"]
[EventDate "1956.03.24"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Nbd7 5. Nf3 c6 6. Qc2 dxc4 7. e4 b5 8. e5 h6 9. Bh4 g5 10. Nxg5 hxg5 11. Bxg5 Qa5 12. exf6 Bb7 13. Bd2 Qc7 14. h4 Nxf6 15. 0-0-0 0-0-0 16. Bg5 Be7 17. Rg1 Nd5 18. Bxe7 Nxe7 19. g3 Nf5 20. Ne2 c5 21. dxc5 Rxd1+ 22. Qxd1 Qxc5 23. Qe1 Rd8 24. Bg2 Bxg2 25. Rxg2 Ne3 26. Rg1 Rd1+ 27. Qxd1 Nxd1 28. Kxd1 Qxf2 29. h5 Qh2 30. g4 Kd7 31. Rg3 b4 32. Kd2 e5 33. a3 a5 34. axb4 axb4 35. Re3 Ke6 36. Kd1 Kd5 37. Kd2 Ke6 38. Rf3 f6 39. Ke3 Qh1 40. Rf2 c3 0-1

