[Event "FIN-ch39 corr"]
[Site "Finland"]
[Date "1994.??.??"]
[Round "?"]
[White "Huuskonen, Veli Matti"]
[Black "Osterberg, Keijo"]
[Result "1-0"]
[ECO "C18"]
[PlyCount "55"]
[EventDate "1994.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 e6 2. e4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Qc7 8. Qxg7 Rg8 9. Qxh7 cxd4 10. Ne2 Nbc6 11. f4 Bd7 12. Qd3 dxc3 13. Nxc3 a6 14. Rb1 Na5 15. h4 Nf5 16. Rh3 0-0-0 17. h5 Rg4 18. Qf3 Rdg8 19. h6 R4g6 20. h7 Rh8 21. g4 Nd4 22. Qf2 Ndc6 23. Be3 Qd8 24. Bb6 Qf8 25. Bxa5 Nxa5 26. Qa7 Qg7 27. Bxa6 Bc6 28. Bxb7+ 1-0

[Event "FIN-ch39 corr"]
[Site "Finland"]
[Date "1994.??.??"]
[Round "?"]
[White "Juntunen, Jaakko"]
[Black "Osterberg, Keijo"]
[Result "1-0"]
[ECO "C19"]
[PlyCount "67"]
[EventDate "1994.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3 Nbc6 8. Rb1 c4 9. h4 Qc7 10. g3 Bd7 11. Bg2 0-0-0 12. h5 h6 13. 0-0 Qa5 14. Qd2 Kb8 15. a4 Nc8 16. Ba3 N6e7 17. Rb4 Bc6 18. Rfb1 Rd7 19. Qf4 Rf8 20. Nd2 Nb6 21. Bh3 Nxa4 22. Rxa4 Qxa4 23. Bd6+ Rc7 24. Bxe6 Qxc2 25. Bg4 f5 26. exf6 Rxf6 27. Bxc7+ Ka8 28. Qe3 Nf5 29. Bxf5 Qxf5 30. Qe7 Rf8 31. Ra1 a6 32. Bf4 Re8 33. Qxg7 Qc2 34. Qg4 1-0

[Event "FIN-ch39 corr"]
[Site "Finland"]
[Date "1994.??.??"]
[Round "?"]
[White "Lehtinen, Pentti"]
[Black "Osterberg, Keijo"]
[Result "1-0"]
[ECO "C19"]
[PlyCount "71"]
[EventDate "1994.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. a4 Nbc6 8. Nf3 Qa5 9. Bd2 c4 10. Be2 Bd7 11. 0-0 0-0-0 12. Re1 h6 13. Qc1 Kb8 14. Qa3 Nc8 15. Reb1 Nb6 16. Rb5 Qa6 17. Rb2 Na5 18. Qe7 Rhf8 19. Qd6+ Ka8 20. Rba2 Bc6 21. Qb4 Nc8 22. Bc1 b6 23. Ba3 Rfe8 24. Qb2 Rd7 25. Bb4 Rb7 26. Qc1 Rd8 27. Qf4 Rdd7 28. Bf8 g5 29. Qg4 Rd8 30. Bxh6 Rg8 31. Bxg5 Rb8 32. Qh5 Qb7 33. Bf6 Rxg2+ 34. Kxg2 Bxa4 35. Rxa4 Nb3 36. cxb3 1-0

[Event "FIN-ch39 corr"]
[Site "Finland"]
[Date "1994.??.??"]
[Round "?"]
[White "Vayrynen, Timo"]
[Black "Osterberg, Keijo"]
[Result "1-0"]
[ECO "C15"]
[PlyCount "58"]
[EventDate "1994.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 dxe4 6. Qg4 Nf6 7. Qxg7 Rg8 8. Qh6 Rg6 9. Qe3 b6 10. Ne2 Bb7 11. Nf4 Rg8 12. Bb2 Nbd7 13. 0-0-0 Qe7 14. c4 0-0-0 15. f3 exf3 16. gxf3 Ng4 17. fxg4 Bxh1 18. d5 e5 19. Nh3 e4 20. Be2 Bg2 21. Nf4 Nf6 22. Nxg2 Nxg4 23. Qh3 f5 24. Rf1 Qg5+ 25. Nf4 Rd7 26. Kb1 Rf7 27. c5 bxc5 28. Qb3 Rf6 29. Bxf6 Qxf4 1-0

[Event "FIN-ch37 corr"]
[Site "Finland"]
[Date "1992.??.??"]
[Round "?"]
[White "Linna, Asko"]
[Black "Osterberg, Keijo"]
[Result "1-0"]
[ECO "E09"]
[PlyCount "91"]
[EventDate "1992.??.??"]
[EventType "tourn (corr)"]
[EventRounds "12"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 e6 2. c4 Nf6 3. g3 d5 4. Bg2 Be7 5. Nf3 0-0 6. 0-0 Nbd7 7. Qc2 c6 8. Nbd2 b6 9. e4 Bb7 10. b3 Rc8 11. Rd1 Qc7 12. Bb2 c5 13. cxd5 exd5 14. e5 Ne8 15. Bh3 cxd4 16. Qf5 Nc5 17. Nxd4 g6 18. Qf3 Rd8 19. Qe3 Ng7 20. Rac1 Qb8 21. N2f3 Rfe8 22. Ba3 Nce6 23. Bxe7 Rxe7 24. Bxe6 Nxe6 25. Qh6 Rc8 26. Nxe6 fxe6 27. Rxc8+ Qxc8 28. Nd4 a6 29. Rc1 Qe8 30. Rc3 b5 31. b4 Qf8 32. Qxf8+ Kxf8 33. h4 Kg8 34. Kg2 Kg7 35. Kf3 Kg8 36. Kg4 Kg7 37. Kg5 h6+ 38. Kg4 Kg8 39. h5 g5 40. f4 gxf4 41. gxf4 Rg7+ 42. Kf3 Re7 43. Ke3 Kh8 44. Rc2 Kg8 45. f5 exf5 46. Kf4 1-0

[Event "FIN-ch37 corr"]
[Site "Finland"]
[Date "1992.??.??"]
[Round "?"]
[White "Osterberg, Keijo"]
[Black "Kupila, Tapani"]
[Result "0-1"]
[ECO "C48"]
[PlyCount "90"]
[EventDate "1992.??.??"]
[EventType "tourn (corr)"]
[EventRounds "12"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Nxd4 exd4 6. e5 dxc3 7. exf6 Qxf6 8. dxc3 Bc5 9. 0-0 0-0 10. Bxd7 Bxd7 11. Qxd7 Rad8 12. Qg4 Rfe8 13. Qf4 Re2 14. Qxf6 gxf6 15. Bh6 Rxc2 16. Rad1 Bxf2+ 17. Kh1 Re8 18. Rd7 Be3 19. Bxe3 Rxe3 20. Rxc7 Rxb2 21. h3 Kg7 22. Kh2 Rxa2 23. Rxb7 Rxc3 24. Re1 Rcc2 25. Rg1 Kg6 26. Rb8 f5 27. Rg8+ Kf6 28. Rf1 a5 29. Rf4 Ke5 30. Rf3 f4 31. Rg4 f5 32. Rgxf4 Rxg2+ 33. Kh1 Rg5 34. h4 Rh5 35. Rc4 Rh6 36. Rcf4 Rf6 37. Kg1 Rf7 38. Kh1 Rd2 39. Ra4 Ra7 40. Rfa3 Rd5 41. Kg2 Kd6 42. Kf3 Kc6 43. Kf4 Kb6 44. Kg5 Rb5 45. Rd4 Rf7 0-1

[Event "corr"]
[Site "corr"]
[Date "1992.??.??"]
[Round "?"]
[White "Osterberg, Keijo"]
[Black "Lautamaeki, Matti"]
[Result "1/2-1/2"]
[ECO "C40"]
[PlyCount "70"]
[EventDate "1992.??.??"]
[EventType "tourn (corr)"]
[EventRounds "12"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d5 3. exd5 e4 4. Qe2 Nf6 5. Nc3 Be7 6. Nxe4 Nxd5 7. d3 0-0 8. Qd1 f5 9. Nc3 Nxc3 10. bxc3 Bf6 11. d4 Re8+ 12. Be2 Nc6 13. 0-0 Be6 14. Bd3 g6 15. Re1 Qd7 16. Bg5 Bg7 17. Qd2 Bd5 18. Rxe8+ Rxe8 19. Qf4 Nd8 20. Bxd8 Qxd8 21. Rb1 b6 22. h4 Qd6 23. Qxd6 cxd6 24. Nd2 Rc8 25. c4 Bf7 26. d5 Be8 27. Nf3 Bf6 28. Re1 Bd7 29. Rb1 Rc5 30. Rb3 Ra5 31. a3 Ba4 32. Rb1 h5 33. g3 Bd7 34. Rb3 Kf7 35. Kf1 Ba4 1/2-1/2

[Event "FIN-ch37 corr"]
[Site "Finland"]
[Date "1992.??.??"]
[Round "?"]
[White "Osterberg, Keijo"]
[Black "Lehtosaari, Kalevi"]
[Result "1-0"]
[ECO "D20"]
[PlyCount "65"]
[EventDate "1992.??.??"]
[EventType "tourn (corr)"]
[EventRounds "12"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. 0-0 0-0 8. c4 Nf6 9. Nc3 dxc4 10. Bxc4 Bg4 11. h3 Bh5 12. Re1 Nc6 13. g4 Bg6 14. Bg5 h6 15. Bh4 Bf4 16. Ne5 Kh7 17. Nd5 Bg5 18. Bxg5 hxg5 19. Nxf6+ gxf6 20. Nxc6 bxc6 21. Rc1 Qd6 22. Bb3 Rab8 23. Qf3 Rfe8 24. Re3 Qxd4 25. Rxc6 Rxb3 26. axb3 Rxe3 27. Qxe3 Qxb2 28. Rxc7 a6 29. Rc8 Qb1+ 30. Kh2 Qf1 31. Rc1 Qb5 32. Qc3 Kg7 33. Re1 1-0

[Event "FIN-ch E78 corr"]
[Site "Finland"]
[Date "1990.??.??"]
[Round "?"]
[White "Elmeranta, Mauri"]
[Black "Osterberg, Keijo"]
[Result "1/2-1/2"]
[ECO "C18"]
[PlyCount "94"]
[EventDate "1990.??.??"]
[EventType "tourn (corr)"]
[EventRounds "6"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Qc7 8. Qxg7 Rg8 9. Qxh7 cxd4 10. Ne2 Nbc6 11. f4 Bd7 12. Qd3 dxc3 13. Qxc3 Nf5 14. Rb1 d4 15. Qd3 0-0-0 16. g3 Na5 17. Rb4 Bc6 18. Rg1 Bd5 19. g4 Nh4 20. Rg3 Bc4 21. Qe4 Qc5 22. Bd2 Ng6 23. c3 d3 24. Nd4 Rd5 25. Bxd3 Nxe5 26. Bxc4 Nexc4 27. Bc1 Nd6 28. Qc2 Rd8 29. Rg2 e5 30. fxe5 Rxe5+ 31. Kf1 Rde8 32. Nf3 R5e6 33. Rd4 Nac4 34. Rd3 Re3 35. Rf2 Qc6 36. Kg1 Re1+ 37. Kg2 R8e3 38. Rxd6 Nxd6 39. Bxe3 Rxe3 40. Qh7 Rxc3 41. Qh8+ Kc7 42. Qf6 Re3 43. h4 Qe4 44. Kh2 Re2 45. Qc3+ Kd7 46. Rxe2 Qxe2+ 47. Kh3 Qf1+ 1/2-1/2

[Event "FIN-ch ME qual corr"]
[Site "Finland"]
[Date "1990.??.??"]
[Round "?"]
[White "Osterberg, Keijo"]
[Black "Halmeenmaki, Juha Pekka"]
[Result "1-0"]
[ECO "B09"]
[PlyCount "49"]
[EventDate "1990.??.??"]
[EventType "tourn (corr)"]
[EventRounds "6"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 c5 6. Bb5+ Bd7 7. e5 Ng4 8. h3 Bxb5 9. Nxb5 dxe5 10. hxg4 Qa5+ 11. Kf2 e4 12. Ng5 Qxb5 13. dxc5 Qxc5+ 14. Kg3 Qc4 15. Re1 f5 16. gxf5 gxf5 17. Qh5+ Kd7 18. Nf7 Rg8 19. Qxf5+ Ke8 20. Nd6+ exd6 21. Rxe4+ Be5+ 22. Kh2 Qf1 23. Qc8+ Kf7 24. Qxb7+ Kf6 25. fxe5+ 1-0

[Event "FIN-ch ME qual corr"]
[Site "Finland"]
[Date "1990.??.??"]
[Round "?"]
[White "Osterberg, Keijo"]
[Black "Linden, Tor"]
[Result "1-0"]
[ECO "C54"]
[PlyCount "63"]
[EventDate "1990.??.??"]
[EventType "tourn (corr)"]
[EventRounds "6"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Bd2 Nxe4 8. Bxb4 Nxb4 9. Bxf7+ Kxf7 10. Qb3+ d5 11. Ne5+ Ke6 12. Qxb4 Qe7 13. Qb3 Qd6 14. 0-0 Ke7 15. Re1 Be6 16. Qxb7 Rhe8 17. Rc1 Rec8 18. Rc6 Qd8 19. Nd2 Nd6 20. Qb4 Kf8 21. Re1 Rab8 22. Qc3 Rb6 23. Nb3 Rxc6 24. Nxc6 Qf6 25. Nc5 Ne4 26. Nxe4 dxe4 27. Rxe4 Bd5 28. Ne7 Bxe4 29. Nxc8 Qg5 30. f3 Bb7 31. Nxa7 Ke8 32. a4 1-0

[Event "FIN-ch ME qual corr"]
[Site "Finland"]
[Date "1989.??.??"]
[Round "?"]
[White "Soederberg, Kaj W"]
[Black "Osterberg, Keijo"]
[Result "1/2-1/2"]
[ECO "E32"]
[PlyCount "37"]
[EventDate "1989.??.??"]
[EventType "tourn (corr)"]
[EventRounds "6"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 e6 2. c4 Nf6 3. Nc3 Bb4 4. Qc2 0-0 5. Bg5 h6 6. Bh4 c5 7. e3 cxd4 8. exd4 Nc6 9. Nf3 Be7 10. a3 d5 11. Rd1 b6 12. Bd3 dxc4 13. Bxc4 Na5 14. Ba2 Nd5 15. Bxe7 Qxe7 16. b4 Ba6 17. bxa5 Rfc8 18. Bxd5 exd5+ 19. Kd2 1/2-1/2

[Event "FIN-ch E71 corr"]
[Site "Finland"]
[Date "1988.??.??"]
[Round "?"]
[White "Osterberg, Keijo"]
[Black "Hiltunen, Reijo"]
[Result "1/2-1/2"]
[ECO "B33"]
[PlyCount "106"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "6"]
[EventCountry "FIN"]
[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 e6 6. Ndb5 d6 7. Bf4 e5 8. Bg5 a6 9. Na3 b5 10. Nd5 Be7 11. Nxe7 Nxe7 12. Bxf6 gxf6 13. Qf3 f5 14. exf5 Bxf5 15. Bd3 Be6 16. 0-0 0-0 17. Rfd1 f5 18. c4 Ng6 19. cxb5 d5 20. Bf1 Ra7 21. bxa6 Rg7 22. Nb5 Nh4 23. Qa3 d4 24. Rd3 f4 25. Qd6 Qxd6 26. Nxd6 Bd5 27. g3 Nf3+ 28. Rxf3 Bxf3 29. Bc4+ Kh8 30. Bd3 fxg3 31. fxg3 Rd7 32. Ne4 Bxe4 33. Bxe4 d3 34. Bb7 d2 35. Rd1 e4 36. Bxe4 Re7 37. Bc2 Re1+ 38. Kg2 Rxd1 39. Bxd1 Rf6 40. a7 Ra6 41. Kf2 Rxa7 42. Ke2 Rxa2 43. b3 Kg7 44. Kd3 Kf6 45. h3 Ke5 46. Bc2 d1Q+ 47. Bxd1 Rg2 48. Kc4 Rxg3 49. Bg4 Kd6 50. b4 Kc7 51. Kd4 Kb6 52. Ke4 Kb5 53. Kf4 Ra3 1/2-1/2

[Event "FIN-ch E75 corr"]
[Site "Finland"]
[Date "1988.??.??"]
[Round "?"]
[White "Osterberg, Keijo"]
[Black "Oikamo, Teijo"]
[Result "1-0"]
[ECO "A13"]
[PlyCount "115"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "6"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. g3 a6 4. Bg2 b5 5. b3 Bb7 6. Nc3 b4 7. Na4 Be7 8. 0-0 0-0 9. d4 Be4 10. Nh4 Bxg2 11. Nxg2 d6 12. a3 bxa3 13. Bxa3 c6 14. Nf4 Nbd7 15. Qc2 Nb6 16. Bb4 Nxa4 17. Rxa4 e5 18. dxe5 dxe5 19. Rd1 Qe8 20. Bxe7 Qxe7 21. Ng2 Nd7 22. Ra5 Rfd8 23. Ne3 g6 24. Qa2 Qe8 25. Rxa6 Nc5 26. Rxd8 Rxd8 27. Ra5 Nb7 28. Ra7 Nd6 29. Qa5 h5 30. h4 Ne4 31. Qa1 Qe6 32. Ra8 Rxa8 33. Qxa8+ Kg7 34. Qd8 Nc5 35. b4 Nb3 36. Qd3 Nd4 37. Nc2 Nf5 38. e4 Qd6 39. Qe2 Nd4 40. Qd1 Nb5 41. Qa1 Nd4 42. Nxd4 exd4 43. c5 Qd7 44. Kf1 f5 45. exf5 gxf5 46. Qc1 Qd5 47. Qg5+ Kf8 48. Ke1 Qe4+ 49. Kd2 d3 50. Kc3 Qe1+ 51. Qd2 Qe5+ 52. Kxd3 Qe4+ 53. Kc3 Qf3+ 54. Qe3 Qd5 55. Qd3 Qe5+ 56. Kc4 Qe6+ 57. Kd4 Qf6+ 58. Ke3 1-0

[Event "FIN-ch H qual corr"]
[Site "Finland"]
[Date "1986.??.??"]
[Round "?"]
[White "Osterberg, Keijo"]
[Black "Mannonen, Kaarlo"]
[Result "1-0"]
[ECO "C54"]
[PlyCount "71"]
[EventDate "1986.??.??"]
[EventType "tourn (corr)"]
[EventRounds "6"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Bd2 d5 8. exd5 Nxd5 9. Bxb4 Ncxb4 10. Qb3 c6 11. a3 Qe7+ 12. Kf1 b5 13. Be2 Nf4 14. Nc3 Nxe2 15. Nxe2 Nd5 16. Ne5 Bd7 17. Rc1 Rc8 18. Nc3 0-0 19. Ne4 Rfe8 20. f3 Bf5 21. Rxc6 Bxe4 22. Rxc8 Rxc8 23. fxe4 Qf6+ 24. Nf3 Rc1+ 25. Kf2 Rxh1 26. Qxd5 g6 27. Qa8+ Kg7 28. Qxa7 Rxh2 29. e5 Qf5 30. Qc7 g5 31. e6 Rh6 32. d5 g4 33. e7 gxf3 34. gxf3 Rf6 35. Qc3 Qd7 36. Qe5 1-0

[Event "EU-ch37 corr"]
[Site "ICCF corr"]
[Date "1985.??.??"]
[Round "?"]
[White "Osterberg, Keijo"]
[Black "Koskinen, Erkki"]
[Result "1/2-1/2"]
[ECO "C48"]
[PlyCount "51"]
[EventDate "1985.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Nxd4 exd4 6. e5 dxc3 7. exf6 cxd2+ 8. Bxd2 Qxf6 9. 0-0 Qxb2 10. Re1+ Kd8 11. Rb1 Qf6 12. Rb3 c6 13. Rf3 Qg6 14. Bc4 f6 15. Rg3 Qf5 16. Bf7 Kc7 17. Re8 d6 18. Be6 Qe5 19. Re3 Qb5 20. c4 Qa6 21. Bb4 c5 22. Bxc5 Qc6 23. Bxd6+ Qxd6 24. Qxd6+ Kxd6 25. Rxc8 Rxc8 26. Bxc8 1/2-1/2

[Event "EU-ch37 corr"]
[Site "ICCF corr"]
[Date "1985.??.??"]
[Round "?"]
[White "Peltomaa, Eljas"]
[Black "Osterberg, Keijo"]
[Result "0-1"]
[ECO "A46"]
[PlyCount "52"]
[EventDate "1985.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 e6 2. Nf3 Nf6 3. Bg5 h6 4. Bh4 c5 5. e3 Qb6 6. Nc3 d5 7. Na4 Qa5+ 8. c3 cxd4 9. Nxd4 Bd7 10. Qb3 b6 11. Bxf6 gxf6 12. Bb5 a6 13. Bxd7+ Nxd7 14. Nc6 Qb5 15. Qxb5 axb5 16. Nxb6 Nxb6 17. Nd4 b4 18. cxb4 Bxb4+ 19. Ke2 0-0 20. Nc2 Bd6 21. b3 Rfc8 22. Kd2 Be5 23. Nd4 Ra3 24. Rhc1 Rca8 25. Rc2 Bxd4 26. exd4 Rxb3 0-1

[Event "FIN-ch I qual corr"]
[Site "Finland"]
[Date "1984.??.??"]
[Round "?"]
[White "Redsven, Risto"]
[Black "Osterberg, Keijo"]
[Result "0-1"]
[ECO "C43"]
[PlyCount "46"]
[EventDate "1984.??.??"]
[EventType "tourn (corr)"]
[EventRounds "6"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qxd4 d5 6. exd6 Nxd6 7. Nc3 Nc6 8. Qf4 g6 9. Bd2 Qe7+ 10. Be2 Be6 11. Nd4 Bh6 12. Qxh6 Nxd4 13. Qg7 Nxc2+ 14. Kd1 0-0-0 15. Kxc2 Bf5+ 16. Kc1 Ne4 17. Bf4 Rhe8 18. g4 Nxf2 19. gxf5 Nxh1 20. fxg6 hxg6 21. Bg4+ Kb8 22. Kc2 Nf2 23. Rf1 Nxg4 0-1

[Event "FIN-ch I qual corr"]
[Site "Finland"]
[Date "1981.??.??"]
[Round "?"]
[White "Osterberg, Keijo"]
[Black "Arasola, Esa"]
[Result "1/2-1/2"]
[ECO "E51"]
[PlyCount "73"]
[EventDate "1981.??.??"]
[EventType "tourn (corr)"]
[EventRounds "6"]
[EventCountry "FIN"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Bb4 5. e3 0-0 6. Bd3 Nc6 7. 0-0 dxc4 8. Bxc4 Bd6 9. e4 e5 10. d5 Ne7 11. Ne1 Ng6 12. Nd3 Re8 13. Qe2 a6 14. a4 Bd7 15. a5 c6 16. Bg5 h6 17. Bxf6 Qxf6 18. dxc6 Bxc6 19. Rfb1 Nf4 20. Qc2 Nxd3 21. Bxd3 Rac8 22. b4 Rc7 23. Qb3 Rec8 24. Qd1 Qd8 25. b5 axb5 26. Nxb5 Rd7 27. Qb3 Bc5 28. Rd1 Ra8 29. Bf1 Rxa5 30. Rxd7 Bxd7 31. Rxa5 Qxa5 32. Qd5 Bxf2+ 33. Kxf2 Qb6+ 34. Kf3 Qf6+ 35. Ke2 Bg4+ 36. Ke1 Qf4 37. Bc4 1/2-1/2

