[Event "USA corr"]
[Site "USA"]
[Date "1969.??.??"]
[Round "?"]
[White "Berger, N."]
[Black "Birsten, OG."]
[Result "0-1"]
[ECO "B88"]
[PlyCount "36"]
[EventDate "1969.??.??"]
[EventType "tourn (corr)"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. 0-0 Be7 8. Bb3 0-0 9. Be3 Bd7 10. f4 Nxd4 11. Bxd4 Bc6 12. Qe2 Qa5 13. Rad1 e5 14. fxe5 dxe5 15. Rf5 Bc5 16. Qc4 Bxd4+ 17. Rxd4 Rac8 18. Qd3 Qc5 0-1

[Event "corr"]
[Site "corr"]
[Date "1968.??.??"]
[Round "?"]
[White "Weaver, G."]
[Black "Birsten, OG."]
[Result "0-1"]
[ECO "D61"]
[PlyCount "44"]
[EventDate "1968.??.??"]
[EventType "game (corr)"]
[EventRounds "9"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Nf3 Nbd7 7. Qc2 c5 8. 0-0-0 Qa5 9. Kb1 cxd4 10. exd4 dxc4 11. Bxc4 b5 12. Bxb5 Rb8 13. Ba4 Bb4 14. Bb3 Ba6 15. Ne5 Rfc8 16. Nxd7 Nxd7 17. Bd2 Nb6 18. Rhe1 Nc4 19. Bxc4 Bxc4 20. Qa4 Bd3+ 21. Ka1 Bxc3 22. Qxa5 Bxb2# 0-1

[Event "corr"]
[Site "corr"]
[Date "1964.??.??"]
[Round "?"]
[White "Birsten, OG."]
[Black "Itkin, H."]
[Result "1-0"]
[ECO "B95"]
[PlyCount "51"]
[EventDate "1964.??.??"]
[EventType "tourn (corr)"]
[EventRounds "9"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. Be2 Be7 8. 0-0 Qc7 9. f4 Nc6 10. Bf3 0-0 11. Nce2 Qb6 12. Kh1 Qxb2 13. Rb1 Qxa2 14. Nxc6 bxc6 15. e5 d5 16. exf6 gxf6 17. Bh6 Rd8 18. Rb3 Qa5 19. Bh5 Bf8 20. Rg3+ Kh8 21. Qd4 e5 22. fxe5 Bxh6 23. Bxf7 Bd7 24. e6 Bg7 25. Rxg7 Rg8 26. Rxg8+ 1-0

[Event "USA corr"]
[Site "USA"]
[Date "1962.??.??"]
[Round "?"]
[White "Birsten, OG."]
[Black "Hankin, SJ."]
[Result "0-1"]
[ECO "B71"]
[PlyCount "42"]
[EventDate "1962.??.??"]
[EventType "tourn (corr)"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4 Nc6 7. Nxc6 bxc6 8. e5 Ng4 9. Be2 h5 10. Bf3 Qb6 11. Qe2 Ba6 12. Qe4 d5 13. Qa4 e6 14. Nd1 Bc5 15. Qb3 Bf2+ 16. Nxf2 Qxf2+ 17. Kd1 Qd4+ 18. Ke1 Qf2+ 19. Kd1 0-0-0 20. h3 d4 21. Re1 Ne3+ 0-1

[Event "USA corr"]
[Site "USA"]
[Date "1962.??.??"]
[Round "?"]
[White "Birsten, OG."]
[Black "Kugelmass"]
[Result "1-0"]
[ECO "B64"]
[PlyCount "37"]
[EventDate "1962.??.??"]
[EventType "tourn (corr)"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 Be7 8. 0-0-0 0-0 9. f4 h6 10. Bh4 Nxe4 11. Nxc6 Nxd2 12. Nxe7+ Kh7 13. Bd3+ f5 14. Nxf5 g5 15. Nxh6+ Kg7 16. Bxg5 Qb6 17. Rxd2 Bd7 18. Ng4 Rfc8 19. h4 1-0

[Event "corr"]
[Site "corr"]
[Date "1960.??.??"]
[Round "?"]
[White "Birsten, OG."]
[Black "Schlesinger, P."]
[Result "1-0"]
[ECO "B98"]
[PlyCount "73"]
[EventDate "1960.??.??"]
[EventType "tourn (corr)"]
[EventRounds "9"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[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 Qc7 9. 0-0-0 b5 10. g4 b4 11. Nce2 Nxe4 12. Bxe7 Bb7 13. Bg2 Qxe7 14. Rhe1 0-0 15. Ng3 Nc5 16. Qf2 d5 17. Nh5 g6 18. Nf5 gxf5 19. gxf5 f6 20. fxe6 Kh8 21. Bxd5 Nc6 22. Ng3 Na5 23. Nf5 Qc7 24. e7 Rfc8 25. Nd6 Qxd6 26. Bxb7 Naxb7 27. Rxd6 Nxd6 28. Qd4 Nde4 29. Qd5 Rg8 30. Kd1 a5 31. Re3 Rae8 32. Qf7 f5 33. Ke2 Nd7 34. Rxe4 fxe4 35. f5 Ne5 36. Qe6 Nc6 37. Qf6+ 1-0

