[Event "Wohlen op 3rd"]
[Site "Wohlen"]
[Date "2022.08.19"]
[Round "1"]
[White "Cassens, Heiko"]
[Black "Birbaum, Hans"]
[Result "1-0"]
[ECO "C62"]
[WhiteElo "1755"]
[BlackElo "1386"]
[PlyCount "56"]
[EventDate "2022.08.19"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SUI"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. Nf3 d6 4. d4 exd4 5. Qxd4 Nc6 6. Bb5 Bd7 7. Bxc6 Bxc6 8. 0-0 Be7 9. Bg5 0-0 10. Rad1 h6 11. Bf4 Nh5 12. Be3 Nf6 13. Rfe1 Ng4 14. Bf4 Re8 15. h3 Nf6 16. Qd3 Nh5 17. Be3 Nf6 18. Nd4 Bd7 19. f4 c5 20. Ndb5 Bxb5 21. Qxb5 Qc8 22. Qe2 Bf8 23. Qf3 a6 24. Bf2 b5 25. Bh4 Nh7 26. Nd5 Rb8 27. Ne3 g6 28. Nd5 Qe6 1-0

[Event "Zuerich op-B 40th"]
[Site "Zuerich"]
[Date "2016.12.26"]
[Round "1"]
[White "Birbaum, Hans"]
[Black "Schweizer, Robert"]
[Result "0-1"]
[ECO "D05"]
[WhiteElo "1507"]
[BlackElo "1820"]
[PlyCount "72"]
[EventDate "2016.12.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. e3 e6 4. Bd3 c5 5. b3 cxd4 6. exd4 Bb4+ 7. Bd2 Bd6 8. 0-0 0-0 9. c4 Nbd7 10. cxd5 exd5 11. Re1 b6 12. Bg5 Re8 13. Nbd2 Bb7 14. Rc1 h6 15. Be3 Ne4 16. Nf1 f5 17. Bxe4 dxe4 18. Ne5 Nxe5 19. dxe5 Bxe5 20. Qh5 f4 21. Red1 Qf6 22. Bd2 Rac8 23. Rc4 b5 24. Rcc1 Red8 25. Ba5 Re8 26. Qe2 a6 27. Bb4 f3 28. Qe1 Rxc1 29. Rxc1 Qg5 30. g3 h5 31. Ne3 h4 32. g4 Qf4 33. Nf1 Qxg4+ 34. Ng3 hxg3 35. hxg3 Bd4 36. Rc7 Qxg3+ 0-1

[Event "Zuerich op-B 35th"]
[Site "Zuerich"]
[Date "2011.12.27"]
[Round "2"]
[White "Forster, Markus"]
[Black "Birbaum, Hans"]
[Result "1-0"]
[ECO "B98"]
[WhiteElo "1923"]
[BlackElo "1616"]
[PlyCount "41"]
[EventDate "2011.12.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "CBM 146 Extra"]
[Source "ChessBase"]
[SourceDate "2012.02.29"]
[SourceVersion "1"]
[SourceVersionDate "2012.02.29"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Nc6 9. 0-0-0 Qc7 10. g4 e5 11. Bxf6 Nxd4 12. Rxd4 exd4 13. Nd5 Qa5 14. Bxe7 Qxa2 15. Bxd6 Qa1+ 16. Kd2 Qa5+ 17. Bb4 Qd8 18. Be2 f5 19. gxf5 Bxf5 20. exf5 b5 21. Qh5+ 1-0

