[Event "corr"]
[Site "corr"]
[Date "1980.??.??"]
[Round "?"]
[White "Heidenfeld, Wolfgang"]
[Black "Fricker, Thomas"]
[Result "1-0"]
[ECO "C01"]
[PlyCount "67"]
[EventDate "1980.??.??"]
[EventType "match (corr)"]
[EventRounds "10"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Be3 dxe4 4. f3 Nf6 5. fxe4 Nxe4 6. Bd3 Nd7 7. Qf3 f5 8. Nd2 Ng5 9. Qg3 Be7 10. Bf4 Ne4 11. Qxg7 Bf6 12. Qh6 Nxd2 13. Bxd2 Bxd4 14. Ne2 Bf6 15. 0-0-0 Ne5 16. Qh5+ Nf7 17. Bb4 Bd7 18. Rhe1 a5 19. Ba3 Bg5+ 20. Kb1 Qf6 21. Qf3 Bc6 22. Bb5 Ne5 23. Qb3 Kf7 24. Nd4 Bd5 25. Qg3 f4 26. Qh3 c6 27. Bd6 Nc4 28. Bxc4 Bxc4 29. Nf3 Bd5 30. Qh5+ Kg8 31. Be5 Bxf3 32. gxf3 Qg7 33. Qh3 Bf6 34. Qxe6+ 1-0

[Event "olm9 qual GP1 B2 corr"]
[Site "ICCF corr"]
[Date "1977.??.??"]
[Round "?"]
[White "Ahman, Harry"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C14"]
[PlyCount "65"]
[EventDate "1977.??.??"]
[EventType "team (corr)"]
[EventRounds "11"]
[SourceTitle "Corr 2002"]
[Source "ChessBase"]
[SourceDate "2002.05.23"]
[SourceVersion "1"]
[SourceVersionDate "2002.05.23"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ng8 6. Be3 b6 7. h4 h5 8. Be2 g6 9. Nf3 Ba6 10. Qd2 Bxe2 11. Nxe2 Nc6 12. c3 Qd7 13. Nf4 Kf8 14. 0-0 Kg7 15. Qc2 Nh6 16. g3 Nf5 17. Rad1 Rad8 18. b3 Na5 19. Bc1 c5 20. dxc5 bxc5 21. c4 d4 22. Nd3 Nc6 23. Bg5 Nb4 24. Nxb4 cxb4 25. Bxe7 Qxe7 26. Rd3 Qc5 27. Qd2 Rd7 28. Rd1 Rhd8 29. Qf4 a5 30. Ne1 Ne7 31. Rf3 Nf5 32. Rfd3 Ne7 33. Rf3 1/2-1/2

[Event "olm9 qual GP1 B2 corr"]
[Site "ICCF corr"]
[Date "1977.??.??"]
[Round "?"]
[White "Heidenfeld, Wolfgang"]
[Black "Gasser, Giorgio"]
[Result "1-0"]
[ECO "C53"]
[PlyCount "51"]
[EventDate "1977.??.??"]
[EventType "team (corr)"]
[EventRounds "11"]
[SourceTitle "Corr 2002"]
[Source "ChessBase"]
[SourceDate "2002.05.23"]
[SourceVersion "1"]
[SourceVersionDate "2002.05.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. d4 Bb6 6. Bg5 Nf6 7. d5 Nb8 8. d6 Qxd6 9. Qxd6 cxd6 10. Bxf6 gxf6 11. Nh4 Nc6 12. Na3 a6 13. Nf5 Bc5 14. 0-0-0 d5 15. Rxd5 Bxa3 16. bxa3 d6 17. Nxd6+ Ke7 18. Rd2 Na5 19. Bxf7 Rd8 20. Nc4 Rxd2 21. Kxd2 Kxf7 22. Nxa5 b5 23. Kc2 Be6 24. Rd1 Bxa2 25. Rd7+ Ke6 26. Rxh7 1-0

[Event "olm9 qual GP1 B2 corr"]
[Site "ICCF corr"]
[Date "1977.??.??"]
[Round "?"]
[White "Sarosy, Zoltan L"]
[Black "Heidenfeld, Wolfgang"]
[Result "0-1"]
[ECO "A89"]
[PlyCount "38"]
[EventDate "1977.??.??"]
[EventType "team (corr)"]
[EventRounds "11"]
[SourceTitle "Corr 2002"]
[Source "ChessBase"]
[SourceDate "2002.05.23"]
[SourceVersion "1"]
[SourceVersionDate "2002.05.23"]
[SourceQuality "1"]

1. c4 f5 2. Nf3 g6 3. Nc3 Nf6 4. g3 d6 5. d4 Bg7 6. Bg2 0-0 7. 0-0 Nc6 8. d5 Ne5 9. Nxe5 dxe5 10. e4 e6 11. dxe6 c6 12. exf5 gxf5 13. Re1 Qxd1 14. Nxd1 e4 15. e7 Re8 16. Bd2 Rxe7 17. Bc3 Be6 18. b3 Nd7 19. Nb2 Bxc3 0-1

[Event "olm9 qual GP1 B3 corr"]
[Site "ICCF corr"]
[Date "1977.??.??"]
[Round "?"]
[White "Schrancz, Istvan"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "C11"]
[PlyCount "73"]
[EventDate "1977.??.??"]
[EventType "team (corr)"]
[EventRounds "11"]
[SourceTitle "Corr 2002"]
[Source "ChessBase"]
[SourceDate "2002.05.23"]
[SourceVersion "1"]
[SourceVersionDate "2002.05.23"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 cxd4 8. Nxd4 Bc5 9. Qd2 0-0 10. 0-0-0 Qe7 11. Bb5 Bxd4 12. Bxd4 a6 13. Be2 Nxd4 14. Qxd4 f6 15. exf6 Qxf6 16. Bg4 Nb6 17. Qxf6 Rxf6 18. g3 Bd7 19. Rhe1 Rc8 20. Ne2 Rc6 21. Nd4 Rd6 22. Rd3 g6 23. Nf3 Na4 24. Ne5 Bb5 25. c4 Bxc4 26. Nxc4 Rc6 27. Bxe6+ Rcxe6 28. Rxe6 Rxe6 29. Ne3 d4 30. Rxd4 Rxe3 31. Kd2 Re7 32. Rxa4 Kf7 33. Rd4 Kf6 34. g4 h5 35. Rd6+ Kg7 36. gxh5 gxh5 37. Rb6 1-0

[Event "Olympiad-21 Final C"]
[Site "Nice"]
[Date "1974.06.24"]
[Round "9"]
[White "Ocampo Vargas, Raul"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C07"]
[PlyCount "59"]
[EventDate "1974.06.15"]
[EventType "team-tourn"]
[EventRounds "15"]
[EventCountry "FRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Mexico"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "MEX"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5 5. Ngf3 cxd4 6. Bc4 Qd6 7. 0-0 Nf6 8. Nb3 Nc6 9. Nbxd4 Nxd4 10. Nxd4 a6 11. Be3 Be7 12. Qe2 0-0 13. Rad1 Qc7 14. Bb3 e5 15. Nf3 Bg4 16. h3 Bh5 17. g4 Bg6 18. Nh4 Rad8 19. Nxg6 hxg6 20. Rxd8 Rxd8 21. Rd1 Rc8 22. g5 Ne8 23. Qf3 Nd6 24. Qd5 Qc6 25. Qxe5 Nf5 26. Qd5 Nxe3 27. fxe3 Qxd5 28. Rxd5 Rd8 29. Re5 Kf8 30. h4 1/2-1/2

[Event "Olympiad-21 Final C"]
[Site "Nice"]
[Date "1974.06.20"]
[Round "6"]
[White "Heidenfeld, Wolfgang"]
[Black "Tumurbator, Purev"]
[Result "1/2-1/2"]
[ECO "C50"]
[PlyCount "38"]
[EventDate "1974.06.15"]
[EventType "team-tourn"]
[EventRounds "15"]
[EventCountry "FRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Mongolia"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "MGL"]

1. e4 Nc6 2. Nf3 e5 3. Bc4 Be7 4. d4 d6 5. Nc3 Bg4 6. h3 Bh5 7. Be3 exd4 8. Bxd4 Nxd4 9. Qxd4 Bf6 10. Qd5 Bxc3+ 11. bxc3 Nf6 12. Qxb7 0-0 13. Nd2 Rb8 14. Qxa7 d5 15. Bb3 dxe4 16. Qe3 Nd5 17. Bxd5 Qxd5 18. 0-0 f5 19. f3 f4 1/2-1/2

[Event "Olympiad-21 Preliminaries E"]
[Site "Nice"]
[Date "1974.06.15"]
[Round "9"]
[White "Gavey, HL."]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C14"]
[PlyCount "77"]
[EventDate "1974.06.07"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "FRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Guernsey Jersey"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "GCI"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ng8 6. Be3 b6 7. Nf3 Ba6 8. Bxa6 Nxa6 9. 0-0 Qd7 10. a3 h5 11. Qd3 Nb8 12. Rfe1 Nh6 13. Qb5 Qxb5 14. Nxb5 Kd7 15. Bg5 Nc6 16. Rad1 a6 17. Bxe7 axb5 18. Bg5 Nf5 19. Bc1 b4 20. axb4 Nxb4 21. c3 Nc6 22. Ng5 Ke7 23. b4 Ra2 24. Rd2 Rha8 25. Nf3 R8a4 26. h3 Na7 27. Rxa2 Rxa2 28. g4 hxg4 29. hxg4 Nh6 30. Bg5+ Kf8 31. Bxh6 gxh6 32. Rc1 b5 33. Kg2 Ra3 34. Kg3 Nc8 35. Ng1 Nb6 36. f4 Nc4 37. Ne2 Ra2 38. Kf3 Nd2+ 39. Ke3 1/2-1/2

[Event "Olympiad-21 Preliminaries E"]
[Site "Nice"]
[Date "1974.06.12"]
[Round "6"]
[White "Heidenfeld, Wolfgang"]
[Black "Hecht, Hans Joachim"]
[Result "0-1"]
[ECO "B02"]
[PlyCount "108"]
[EventDate "1974.06.07"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "FRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Germany"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "GER"]

1. e4 Nf6 2. Nc3 d5 3. e5 Ne4 4. d4 Nxc3 5. bxc3 e6 6. Bd3 c5 7. f4 Nc6 8. Nf3 Qa5 9. Bd2 Qa4 10. Be3 c4 11. Be2 Ba3 12. Bc1 Qa5 13. Kd2 Be7 14. Qe1 Bd7 15. Ke3 f6 16. Rf1 fxe5 17. fxe5 0-0 18. Kf2 Be8 19. Kg1 Bg6 20. Bd1 Rf7 21. Ng5 Rxf1+ 22. Kxf1 Bxg5 23. Bxg5 Rf8+ 24. Bf3 Bxc2 25. Kg1 Bd3 26. Qc1 Qc7 27. Qa3 Qf7 28. Bh4 Qg6 29. Bg3 h5 30. Kh1 Be4 31. Bxe4 Qxe4 32. Qd6 Qg4 33. Rg1 Rf7 34. Be1 Kh7 35. h3 Qf5 36. Bh4 g5 37. Bxg5 Qxg5 38. Qxe6 Rg7 39. Qxd5 Ne7 40. Qxc4 Nf5 41. Qd3 h4 42. Qf3 Rf7 43. Kh2 Qg3+ 44. Kh1 Qg6 45. Qg4 Ng3+ 46. Kh2 Nf1+ 47. Kh1 Ng3+ 48. Kh2 Nf1+ 49. Kh1 Qxg4 50. hxg4 Rf2 51. d5 Kg6 52. d6 Kf7 53. d7 Ke7 54. e6 h3 0-1

[Event "Olympiad-21 Preliminaries E"]
[Site "Nice"]
[Date "1974.06.07"]
[Round "1"]
[White "Heidenfeld, Wolfgang"]
[Black "Lee, Cecil"]
[Result "1-0"]
[ECO "C01"]
[PlyCount "47"]
[EventDate "1974.06.07"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "FRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Trinidad and Tobago"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "TRI"]

1. e4 e6 2. d4 d5 3. Be3 dxe4 4. f3 exf3 5. Nxf3 Nf6 6. Bd3 Be7 7. 0-0 0-0 8. c4 Nbd7 9. Nc3 c5 10. Qc2 cxd4 11. Bxd4 a6 12. Kh1 h6 13. Rae1 Bc5 14. Qf2 Qc7 15. Qh4 b6 16. Ne4 Bxd4 17. Nxd4 Bb7 18. Nxf6+ Nxf6 19. Rxf6 gxf6 20. Qxh6 Rfd8 21. Bh7+ Kh8 22. Qxf6+ Kxh7 23. Re3 Kg8 24. Rh3 1-0

[Event "Irish Times Easter"]
[Site "Dublin"]
[Date "1974.04.15"]
[Round "7"]
[White "Henry, Paul Gerard"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C10"]
[PlyCount "40"]
[EventDate "1974.04.11"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "IRL"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Bd3 Ngf6 6. Nf3 Nxe4 7. Bxe4 Nf6 8. Bd3 Be7 9. 0-0 0-0 10. Qe2 b6 11. Re1 Bb7 12. c3 c5 13. dxc5 Bxc5 14. Bg5 g6 15. Bh4 Be7 16. Rad1 Qc7 17. Ne5 Rad8 18. Bb1 Rxd1 19. Rxd1 Rd8 20. Rxd8+ Qxd8 1/2-1/2

[Event "Irish Times Easter"]
[Site "Dublin"]
[Date "1974.04.14"]
[Round "6"]
[White "Heidenfeld, Wolfgang"]
[Black "Kernan, Bernard"]
[Result "1-0"]
[ECO "C50"]
[PlyCount "121"]
[EventDate "1974.04.11"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "IRL"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 Nc6 2. Nf3 e5 3. Bc4 Nf6 4. d3 Bc5 5. Nc3 d6 6. Bg5 h6 7. Bxf6 Qxf6 8. Nd5 Qg6 9. Qe2 Bb6 10. c3 Na5 11. Bb3 c6 12. Nxb6 axb6 13. Bc2 c5 14. 0-0 Bg4 15. Qe3 0-0 16. Nd2 Be6 17. f4 exf4 18. Rxf4 Bxa2 19. Rxa2 Nc4 20. Nxc4 Rxa2 21. Bb3 Ra1+ 22. Rf1 Rxf1+ 23. Kxf1 Qe6 24. Nd2 Qf6+ 25. Qf2 Qg5 26. Bd5 Qh5 27. Nf3 Ra8 28. Qc2 g5 29. h3 g4 30. hxg4 Qxg4 31. Qb3 Qg3 32. Qd1 b5 33. Bxb7 Rb8 34. Bd5 b4 35. Qb3 Kg7 36. c4 Qf4 37. Qd1 Kf6 38. Qe1 Rb6 39. Kf2 Ra6 40. g3 Qg4 41. e5+ Kg7 42. exd6 Rxd6 43. Qe5+ Rf6 44. Kg2 Qf5 45. Qxf5 Rxf5 46. d4 cxd4 47. Nxd4 Re5 48. Kf2 Re8 49. b3 Kf6 50. Nc6 Kg5 51. Nd4 Kf6 52. Nc2 Rc8 53. Kf3 Kg5 54. Nd4 Rc7 55. Nc6 Rc8 56. Ne5 f6 57. Nd3 h5 58. Nf4 h4 59. Ne6+ Kh5 60. gxh4 Kxh4 61. c5 1-0

[Event "Irish Times Easter"]
[Site "Dublin"]
[Date "1974.04.13"]
[Round "4"]
[White "Heidenfeld, Wolfgang"]
[Black "McGrillen, Hugh"]
[Result "0-1"]
[ECO "B06"]
[PlyCount "98"]
[EventDate "1974.04.11"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "IRL"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 d6 2. b3 Nf6 3. Nc3 g6 4. Bb2 Bg7 5. d4 0-0 6. Nf3 c6 7. Be2 Qc7 8. 0-0 Nbd7 9. Qd3 e5 10. dxe5 dxe5 11. Rad1 Re8 12. Ba3 b5 13. Bd6 Qb6 14. a4 b4 15. Nb1 Nc5 16. Bxc5 Qxc5 17. Nbd2 Be6 18. Ng5 Bc8 19. Qc4 Qe7 20. Qxc6 Bb7 21. Qb5 a6 22. Qb6 h6 23. Nxf7 Kxf7 24. f4 Kg8 25. fxe5 Nxe4 26. Qxg6 Qc5+ 27. Kh1 Nf2+ 28. Rxf2 Qxf2 29. Bc4+ Kh8 30. Bd3 Qxg2+ 31. Qxg2 Bxg2+ 32. Kxg2 Rxe5 33. Nf3 Re7 34. Nh4 Rc7 35. Re1 a5 36. Re6 Rac8 37. Re2 Rd8 38. Nf5 Rc5 39. Nxg7 Kxg7 40. Re7+ Kf6 41. Ra7 Ke5 42. Ra6 Rd6 43. Ra8 Kd4 44. Rf8 Kc3 45. Rf3 Rxd3 46. cxd3 Rg5+ 47. Kf2 Kxb3 48. Ke3 Kxa4 49. d4 b3 0-1

[Event "Irish Times Easter"]
[Site "Dublin"]
[Date "1974.04.13"]
[Round "5"]
[White "Jamieson, Peter Michael"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "C08"]
[PlyCount "65"]
[EventDate "1974.04.11"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "IRL"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 Nf6 5. exd5 exd5 6. Bb5+ Bd7 7. Bxd7+ Nbxd7 8. 0-0 Be7 9. dxc5 Nxc5 10. Nb3 Ne6 11. Nfd4 Nxd4 12. Qxd4 0-0 13. Bg5 h6 14. Bh4 b6 15. Rad1 Rc8 16. Qd3 Qc7 17. c3 Rfd8 18. Rfe1 Qd6 19. Nd4 Bf8 20. Qf5 Qd7 21. Bxf6 Qxf5 22. Nxf5 gxf6 23. Kf1 Rd7 24. Rd4 Kh7 25. Red1 Re8 26. c4 Rc7 27. cxd5 Rc2 28. R4d2 Rxd2 29. Rxd2 Bb4 30. Rd1 Rd8 31. d6 Kg6 32. Rd5 a5 33. d7 1-0

[Event "Irish Times Easter"]
[Site "Dublin"]
[Date "1974.04.12"]
[Round "3"]
[White "Harris, Ronald A"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "D40"]
[PlyCount "26"]
[EventDate "1974.04.11"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "IRL"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 c5 3. e3 e6 4. Nf3 Nf6 5. Nc3 Nc6 6. a3 a6 7. dxc5 dxc4 8. Qxd8+ Kxd8 9. Bxc4 Bxc5 10. b4 Ba7 11. Bb2 b5 12. Be2 Bb7 13. 0-0 Ne7 1/2-1/2

[Event "Irish Times Easter"]
[Site "Dublin"]
[Date "1974.04.12"]
[Round "2"]
[White "Heidenfeld, Wolfgang"]
[Black "Hecht, Hans Joachim"]
[Result "1/2-1/2"]
[ECO "B22"]
[PlyCount "102"]
[EventDate "1974.04.11"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "IRL"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Na3 e6 6. g3 f6 7. Nc4 b5 8. Ne3 fxe5 9. Bxb5 Nxe3 10. dxe3 Bb7 11. e4 Qb6 12. Qe2 Be7 13. Bg5 Bxg5 14. Nxg5 0-0 15. Rd1 Rad8 16. 0-0 h6 17. Nf3 d6 18. Bc4 Rf6 19. Nh4 Na5 20. Bd3 c4 21. Bb1 Rdf8 22. Rd2 Qc7 23. Qe3 d5 24. exd5 exd5 25. Ng6 Re8 26. f4 Qc6 27. Nxe5 d4 28. cxd4 Qh1+ 29. Kf2 Qxh2+ 30. Ke1 Qh3 31. d5 c3 32. Rdf2 Bxd5 33. Qd3 Bc4 34. Qh7+ Kf8 35. Qh8+ Bg8 36. Bh7 Qe6 37. bxc3 Nc6 38. Re2 Ne7 39. Rff2 Rb8 40. Rb2 Rd8 41. Rfe2 Qd5 42. Kf2 Rfd6 43. Nf3 Qc5+ 44. Kg2 Qxc3 45. Rb7 R6d7 46. Rxd7 Rxd7 47. Rc2 Qa5 48. Bxg8 Nxg8 49. Qh7 Nf6 50. Qh8+ Ng8 51. Qh7 Nf6 1/2-1/2

[Event "Irish Times Easter"]
[Site "Dublin"]
[Date "1974.04.11"]
[Round "1"]
[White "Littleton, Michael Flannan"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "D26"]
[PlyCount "59"]
[EventDate "1974.04.11"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "IRL"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 c5 3. e3 cxd4 4. exd4 Nf6 5. Nc3 Nc6 6. Nf3 e6 7. a3 dxc4 8. Bxc4 a6 9. 0-0 Be7 10. Re1 0-0 11. Ba2 Nd5 12. Ne4 Bd7 13. Qd3 Nf6 14. Nc3 Qc7 15. Bg5 Rfe8 16. Rad1 Rad8 17. Bb1 g6 18. Ba2 Bc8 19. Ne4 Nxe4 20. Qxe4 Bxg5 21. Nxg5 h6 22. Nf3 Ne7 23. h4 Nd5 24. Ne5 Qe7 25. Rd3 Nf6 26. Qf4 Kg7 27. Rf3 Rf8 28. Rc1 Nh5 29. Qe3 Qd6 30. Rd1 1/2-1/2

[Event "London Guardian Royal Exchange Reserves"]
[Site "London"]
[Date "1973.12.19"]
[Round "8"]
[White "Grefe, John Alan"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "C00"]
[PlyCount "77"]
[EventDate "1973.12.11"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 e6 2. d3 c5 3. Nf3 Nc6 4. Nbd2 d5 5. g3 Nf6 6. Bg2 Be7 7. 0-0 0-0 8. Re1 Qc7 9. e5 Nd7 10. Qe2 b5 11. Nf1 Bb7 12. Bf4 Rac8 13. h4 Rfd8 14. N1h2 Nf8 15. h5 Qb6 16. Ng4 c4 17. h6 g6 18. Be3 Qc7 19. d4 b4 20. c3 Nd7 21. Bg5 Nb6 22. Bxe7 Nxe7 23. Nf6+ Kh8 24. Ng5 Ng8 25. Qf3 Qe7 26. Ngxh7 Nxh6 27. Qf4 Kg7 28. g4 Rh8 29. Re3 Rxh7 30. Nxh7 Kxh7 31. Rh3 g5 32. Qh2 Qf8 33. f4 Qg7 34. Rh5 Rh8 35. fxg5 Kg6 36. gxh6 Rxh6 37. Rf1 Nd7 38. Bxd5 Bxd5 39. Qc2+ 1-0

[Event "London Guardian Royal Exchange Reserves"]
[Site "London"]
[Date "1973.12.18"]
[Round "7"]
[White "Heidenfeld, Wolfgang"]
[Black "McGrillen, Hugh"]
[Result "0-1"]
[ECO "B52"]
[PlyCount "72"]
[EventDate "1973.12.11"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 Nc6 6. 0-0 g6 7. d4 cxd4 8. Nxd4 Bg7 9. Be3 Nf6 10. f3 0-0 11. Nc3 Rfc8 12. b3 Qd8 13. Qd2 Nd7 14. Kh1 a6 15. Rfd1 Qa5 16. Nd5 Qxd2 17. Rxd2 Kf8 18. Rad1 Rab8 19. Nxc6 bxc6 20. Nf4 a5 21. Nd3 c5 22. Nf2 Nb6 23. Rc1 Rb7 24. Kg1 Ke8 25. Nd3 Nd7 26. Rcc2 Ra8 27. Nc1 a4 28. Kf2 Kd8 29. f4 Kc7 30. bxa4 Rxa4 31. Nd3 Kc6 32. Nc1 Nb6 33. Nb3 Rba7 34. e5 Rxc4 35. exd6 exd6 36. Rxd6+ Kxd6 0-1

[Event "London Guardian Royal Exchange Reserves"]
[Site "London"]
[Date "1973.12.16"]
[Round "5"]
[White "Formanek, Edward W"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "C11"]
[PlyCount "31"]
[EventDate "1973.12.11"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Nce2 c5 6. c3 Nc6 7. f4 f6 8. Nf3 cxd4 9. cxd4 fxe5 10. fxe5 Bb4+ 11. Nc3 0-0 12. Bd3 Be7 13. 0-0 Rf7 14. Bxh7+ Kxh7 15. Ng5+ Bxg5 16. Qh5+ 1-0

[Event "London Guardian Royal Exchange Reserves"]
[Site "London"]
[Date "1973.12.14"]
[Round "4"]
[White "Heidenfeld, Wolfgang"]
[Black "Cafferty, Bernard"]
[Result "1/2-1/2"]
[ECO "B02"]
[PlyCount "32"]
[EventDate "1973.12.11"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. e5 Nfd7 4. Nxd5 Nxe5 5. Ne3 c5 6. Nf3 Nbc6 7. b3 Nxf3+ 8. Qxf3 Nd4 9. Qg3 f6 10. Bb2 g6 11. c3 Nf5 12. Nxf5 Bxf5 13. d4 cxd4 14. Bb5+ Bd7 15. Bxd7+ Qxd7 16. cxd4 Qe6+ 1/2-1/2

[Event "London Guardian Royal Exchange Reserves"]
[Site "London"]
[Date "1973.12.12"]
[Round "2"]
[White "Heidenfeld, Wolfgang"]
[Black "Nunn, John DM"]
[Result "0-1"]
[ECO "B06"]
[PlyCount "64"]
[EventDate "1973.12.11"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 c6 5. Nf3 Bg4 6. Be3 Qb6 7. Qd2 Bxf3 8. gxf3 Nd7 9. Bh3 Qa5 10. Ne2 Qxd2+ 11. Kxd2 e6 12. c4 Ne7 13. Rhc1 f5 14. Rc2 d5 15. cxd5 exd5 16. e5 Nf8 17. Bf2 Ne6 18. Ke3 Kf7 19. Bh4 Nc8 20. Nc1 Nb6 21. b3 Nd7 22. Nd3 Bh6 23. Rg1 Rhc8 24. Rgc1 a5 25. Bg3 a4 26. Rb1 axb3 27. Rxb3 Ra7 28. Rcb2 b5 29. Rc2 Nb6 30. Nb2 Nc4+ 31. Nxc4 dxc4 32. d5 cxd5 0-1

[Event "IRL-ch"]
[Site "Cork"]
[Date "1973.07.10"]
[Round "4"]
[White "Heidenfeld, Wolfgang"]
[Black "Coldrick, Arthur"]
[Result "1-0"]
[ECO "B15"]
[WhiteElo "2250"]
[PlyCount "73"]
[EventDate "1973.07.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c6 2. d4 g6 3. Nc3 d5 4. f4 Bg7 5. e5 h5 6. Bd3 Nh6 7. Nge2 Bf5 8. Bxf5 Nxf5 9. Ng3 Nxg3 10. hxg3 Qd7 11. Qd3 Na6 12. a3 e6 13. Be3 Nc7 14. 0-0-0 0-0-0 15. Kb1 Rdg8 16. g4 hxg4 17. Qe2 g3 18. Qg4 Bf8 19. Qxg3 Be7 20. Qf3 Ne8 21. g4 Ng7 22. Ne2 Qd8 23. Bf2 Rxh1 24. Rxh1 Rh8 25. Rh3 Kd7 26. Qh1 Rxh3 27. Qxh3 Qf8 28. Qh7 Ne8 29. f5 gxf5 30. gxf5 Nc7 31. f6 Bd8 32. Nf4 Ke8 33. Be3 b6 34. Nh5 Kd7 35. Bh6 Qe8 36. Ng7 Qf8 37. Nf5 1-0

[Event "IRL-ch"]
[Site "Cork"]
[Date "1973.07.07"]
[Round "1"]
[White "Cootes, Arthur"]
[Black "Heidenfeld, Wolfgang"]
[Result "0-1"]
[ECO "C14"]
[BlackElo "2250"]
[PlyCount "54"]
[EventDate "1973.07.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6 Bxf6 6. Nf3 0-0 7. e5 Be7 8. Bd3 c5 9. h4 f5 10. exf6 Bxf6 11. Bxh7+ Kxh7 12. Ng5+ Kh6 13. Qd3 Bxg5 14. hxg5+ Kxg5 15. Qh7 Kf6 16. Rh3 Ke7 17. 0-0-0 Kd7 18. Rg3 Rf7 19. dxc5 Qf8 20. Nxd5 exd5 21. Rxd5+ Kc7 22. Qh2 b6 23. cxb6+ axb6 24. Rxg7+ Kb7 25. Rxf7+ Qxf7 26. Rh5 Qxf2 27. Rd5 Qe3+ 0-1

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1972.07.16"]
[Round "9"]
[White "Heidenfeld, Wolfgang"]
[Black "McCurdy, Gerald"]
[Result "1-0"]
[ECO "B51"]
[WhiteElo "2250"]
[PlyCount "101"]
[EventDate "1972.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Nc6 4. 0-0 Qb6 5. Nc3 e6 6. Qe2 Bd7 7. b3 Be7 8. Bb2 Nf6 9. Rfd1 a6 10. Bxc6 Bxc6 11. d4 cxd4 12. Nxd4 0-0 13. Nxc6 bxc6 14. Rd3 Nd7 15. Rf3 e5 16. Rd1 g6 17. Ba3 Nc5 18. Qe3 f5 19. Bxc5 dxc5 20. Qh6 Rf7 21. exf5 c4 22. Rf1 gxf5 23. Qe6 Raf8 24. Nd5 Qd8 25. Qxe5 cxd5 26. Rg3+ Bg5 27. h4 h6 28. hxg5 hxg5 29. Rh3 Rh7 30. Rxh7 Kxh7 31. Rd1 cxb3 32. cxb3 Qe8 33. Qxd5 Qe2 34. Rc1 Qe7 35. Qc5 Rf7 36. Kf1 Qb7 37. Re1 g4 38. Re6 Qd7 39. Qd6 Qxd6 40. Rxd6 f4 41. Rxa6 g3 42. Ra4 Kg6 43. Ke2 Kg5 44. Kf3 gxf2 45. Kxf2 Re7 46. Rc4 Rd7 47. Rc2 Rd3 48. b4 Kg4 49. Rb2 f3 50. b5 fxg2 51. Kxg2 1-0

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1972.07.15"]
[Round "8"]
[White "Cox, David"]
[Black "Heidenfeld, Wolfgang"]
[Result "0-1"]
[ECO "C00"]
[BlackElo "2250"]
[PlyCount "103"]
[EventDate "1972.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 b6 5. c3 Bb7 6. Qc2 c5 7. g3 Qc7 8. Bg2 Nbd7 9. 0-0 Be7 10. Re1 0-0 11. c4 dxe4 12. dxe4 Ne5 13. Nxe5 Qxe5 14. Nf1 Qc7 15. Bf4 Qc6 16. Ne3 Nh5 17. Be5 f6 18. Bc3 Qe8 19. Rad1 Rd8 20. Rxd8 Bxd8 21. f4 Bc7 22. Nd5 exd5 23. cxd5 Nxf4 24. gxf4 Bxf4 25. Bh3 Bc8 26. Qg2 Bxh3 27. Qxh3 Be5 28. Qf5 g6 29. Qg4 Bxc3 30. bxc3 Qe5 31. Qd7 Qxc3 32. Re2 Qd4+ 33. Kg2 Rf7 34. Qc6 c4 35. d6 Qd3 36. Rf2 Qd4 37. Rc2 b5 38. a4 a6 39. axb5 axb5 40. Ra2 Kg7 41. Ra8 f5 42. e5 Qxe5 43. Re8 Qb2+ 44. Kh3 Qc3+ 45. Kg2 Qd2+ 46. Kh3 Qd1 47. Kg2 f4 48. Qc7 f3+ 49. Kh3 Qf1+ 50. Kh4 Qf2+ 51. Kh3 Qg2+ 52. Kh4 0-1

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1972.07.14"]
[Round "7"]
[White "Heidenfeld, Wolfgang"]
[Black "Kerins, Noel"]
[Result "1-0"]
[ECO "B52"]
[WhiteElo "2250"]
[PlyCount "101"]
[EventDate "1972.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 Nc6 6. d4 cxd4 7. Nxd4 Nf6 8. Nc3 g6 9. f3 Bg7 10. Be3 Ne5 11. b3 0-0 12. 0-0 Rfc8 13. Qd2 Nc6 14. Rad1 Ne8 15. Nde2 Qd8 16. f4 Qa5 17. f5 Nf6 18. h3 Nh5 19. Qe1 Be5 20. Rd5 Qd8 21. Qf2 Qe8 22. g4 Ng3 23. Nxg3 Bxc3 24. g5 Be5 25. Bf4 Nb4 26. Rd2 Rd8 27. a3 Nc6 28. h4 Qd7 29. h5 Bxf4 30. Qxf4 Ne5 31. Rh2 e6 32. hxg6 fxg6 33. f6 Rf8 34. Rd1 Qc6 35. Rhd2 Qc5+ 36. Kg2 Nf7 37. e5 Qxe5 38. Qxe5 dxe5 39. Ne4 Rfd8 40. Rd7 b6 41. Kf2 Kf8 42. Ke2 a5 43. R1d3 a4 44. b4 Rac8 45. c5 bxc5 46. bxc5 Kg8 47. Ke3 Rxd7 48. Rxd7 h6 49. Rxf7 hxg5 50. Rg7+ Kh8 51. Nxg5 1-0

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1972.07.13"]
[Round "6"]
[White "Heidenfeld, Wolfgang"]
[Black "Henry, Paul Gerard"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "2250"]
[PlyCount "135"]
[EventDate "1972.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bb5 d6 6. 0-0 Bd7 7. Bxc6 Bxc6 8. d3 Nf6 9. Qe1 0-0 10. Bd2 Qd7 11. h3 Rae8 12. Qh4 e5 13. fxe5 dxe5 14. Ng5 h6 15. Nf3 Nh5 16. g4 Nf4 17. Bxf4 exf4 18. g5 h5 19. Kh2 f5 20. gxf6 Bxf6 21. Qf2 b6 22. Rg1 Kh7 23. Rae1 Qd6 24. Rg2 Re7 25. Reg1 Rg7 26. Kh1 Qe6 27. Kh2 Bd7 28. Rh1 Qxh3+ 29. Kg1 Qe6 30. e5 Be7 31. Ne4 Kg8 32. b3 Bc6 33. Ned2 Bd8 34. Rhh2 Bc7 35. Rg5 Bd8 36. Rgg2 Bc7 37. Rg5 Rf5 38. Rhg2 Bd8 39. Rxf5 Qxf5 40. d4 Qxc2 41. Qe1 Qf5 42. Qc1 Bxf3 43. Nxf3 Qd3 44. Qxf4 cxd4 45. Qxd4 Qxd4+ 46. Nxd4 Kf7 47. e6+ Kg8 48. Nc6 Be7 49. Kf1 Kf8 50. Rd2 Ke8 51. Rd7 Bf6 52. Rxg7 Bxg7 53. Nxa7 Ke7 54. Nc8+ Kxe6 55. Nxb6 Ke5 56. Kg2 g5 57. a4 Kd6 58. b4 Kc6 59. Nc4 Bc3 60. b5+ Kc5 61. Ne3 Be5 62. b6 g4 63. a5 Bb8 64. b7 Kb5 65. Nd5 h4 66. Kh1 h3 67. Nc3+ Kxa5 68. Ne4 1/2-1/2

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1972.07.12"]
[Round "5"]
[White "Kennefick, Maurice"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "A89"]
[BlackElo "2250"]
[PlyCount "45"]
[EventDate "1972.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. c4 f5 2. Nc3 Nf6 3. g3 g6 4. d4 Bg7 5. Bg2 0-0 6. Nf3 d6 7. 0-0 Nc6 8. d5 Ne5 9. Nxe5 dxe5 10. b3 e4 11. Bb2 e6 12. dxe6 Bxe6 13. Qxd8 Rfxd8 14. Rad1 c6 15. Rxd8+ Rxd8 16. Rd1 Rd7 17. Rxd7 Nxd7 18. f3 exf3 19. exf3 Nc5 20. Bf1 a5 21. Nd1 Na6 22. Bxg7 Kxg7 23. Nc3 1/2-1/2

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1972.07.11"]
[Round "4"]
[White "Heidenfeld, Wolfgang"]
[Black "Keeshan, Michael"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "2250"]
[PlyCount "73"]
[EventDate "1972.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Na3 g6 6. g3 Bg7 7. Bg2 Nc7 8. Qe2 0-0 9. 0-0 d6 10. exd6 exd6 11. Nc2 Re8 12. Qd1 d5 13. d4 c4 14. Bg5 f6 15. Bf4 Bf5 16. Bxc7 Qxc7 17. Ne3 Be4 18. Nd2 Bxg2 19. Kxg2 Qd7 20. Qf3 Rad8 21. Rfe1 Kf7 22. Re2 Bh6 23. Ndf1 Re4 24. Nd2 Rxd4 25. cxd4 Nxd4 26. Qg4 Nxe2 27. Qxe2 b5 28. Qf3 d4 29. Ng4 Bxd2 30. Ne5+ Kg7 31. Nxd7 Rxd7 32. Qc6 Rf7 33. Qxb5 c3 34. bxc3 dxc3 35. Qd3 Rc7 36. Rd1 c2 37. Qxd2 1-0

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1972.07.10"]
[Round "3"]
[White "Quigley, Colm"]
[Black "Heidenfeld, Wolfgang"]
[Result "0-1"]
[ECO "C05"]
[BlackElo "2250"]
[PlyCount "52"]
[EventDate "1972.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Ng8 5. f4 b6 6. Ndf3 Ba6 7. Bxa6 Nxa6 8. c4 Bb4+ 9. Kf1 Qd7 10. a3 Be7 11. Qd3 Nb8 12. Ne2 h5 13. f5 dxc4 14. Qxc4 Qc6 15. Qd3 Nh6 16. Nf4 Nxf5 17. d5 Qd7 18. Bd2 0-0 19. g4 hxg4 20. Nd4 Nxd4 21. Qxd4 Nc6 22. Qe3 exd5 23. Nh5 Qf5+ 24. Nf4 Nxe5 25. Re1 Bd6 26. Kg2 Nf3 0-1

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1972.07.09"]
[Round "2"]
[White "Heidenfeld, Wolfgang"]
[Black "O'Leary, Matt"]
[Result "0-1"]
[ECO "A48"]
[WhiteElo "2250"]
[PlyCount "84"]
[EventDate "1972.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 d6 2. Nf3 Nf6 3. c3 g6 4. Qc2 Bg7 5. d4 0-0 6. Bg5 c5 7. dxc5 dxc5 8. Bc4 Nc6 9. Nbd2 Qc7 10. 0-0 a6 11. a4 Rb8 12. Bh4 b5 13. Bg3 e5 14. axb5 axb5 15. Be2 Nh5 16. Nh4 Nf4 17. Bxf4 exf4 18. g3 Bh3 19. Ng2 Bh6 20. Rfd1 f5 21. Nh4 Qe7 22. Ra6 Rf6 23. Qb3+ c4 24. Nxc4 Kh8 25. Na3 fxe4 26. Bxb5 fxg3 27. hxg3 Qe5 28. Qc2 Rbf8 29. b4 Qg5 30. Re1 Rxf2 31. Qxf2 Rxf2 32. Kxf2 e3+ 33. Ke2 Bg4+ 34. Kd3 Qd5+ 35. Kc2 Qa2+ 36. Kd3 Qd2+ 37. Ke4 Qxe1 38. Bxc6 Qxg3 39. Ra8+ Kg7 40. Ra7+ Kf6 41. Bd5 e2 42. Ra6+ Kg5 0-1

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1972.07.08"]
[Round "1"]
[White "O'Briain, Padraig"]
[Black "Heidenfeld, Wolfgang"]
[Result "0-1"]
[ECO "A11"]
[BlackElo "2250"]
[PlyCount "70"]
[EventDate "1972.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. g3 d5 2. Bg2 Nf6 3. Nf3 g6 4. c4 c6 5. b3 Bg7 6. Bb2 0-0 7. 0-0 Nbd7 8. d3 Re8 9. Qc2 e5 10. e3 dxc4 11. bxc4 Qc7 12. Nbd2 Nf8 13. Rac1 Bf5 14. Nh4 Bd7 15. d4 exd4 16. exd4 Rad8 17. Ndf3 Bc8 18. Rfd1 Bg4 19. h3 Bc8 20. Ne5 Nh5 21. Nhf3 h6 22. Qb3 c5 23. Qa3 cxd4 24. Bxd4 Ne6 25. Bb2 b6 26. Ng4 Ng5 27. Bxg7 Kxg7 28. Qc3+ Kh7 29. Rd5 Ne4 30. Qb2 f5 31. Nge5 Nhf6 32. Rxd8 Rxd8 33. Rf1 Be6 34. Nh4 g5 35. Nhg6 Rg8 0-1

[Event "Olympiad-19 Final D"]
[Site "Siegen"]
[Date "1970.09.25"]
[Round "11"]
[White "Heidenfeld, Wolfgang"]
[Black "Gereben, Erno"]
[Result "1/2-1/2"]
[ECO "C69"]
[PlyCount "33"]
[EventDate "1970.09.05"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Switzerland"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "SUI"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 f6 6. d4 exd4 7. Nxd4 c5 8. Nb3 Qxd1 9. Rxd1 Bd7 10. Be3 b6 11. N1d2 Ne7 12. a4 a5 13. Nc4 Be6 14. Nbd2 Nc6 15. c3 0-0-0 16. Bf4 Be7 17. Ne3 1/2-1/2

[Event "Olympiad-19 Final D"]
[Site "Siegen"]
[Date "1970.09.23"]
[Round "9"]
[White "Heidenfeld, Wolfgang"]
[Black "Gilbert, Jaime"]
[Result "0-1"]
[ECO "C55"]
[PlyCount "68"]
[EventDate "1970.09.05"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Portugal"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "POR"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 d6 5. 0-0 Nf6 6. Nc3 Bg4 7. Bb5 exd4 8. Bxc6+ bxc6 9. Qxd4 0-0 10. Bg5 Bxf3 11. gxf3 Rb8 12. b3 Re8 13. Rad1 Nh5 14. Bxe7 Qxe7 15. Kh1 Qh4 16. Rg1 Re6 17. Qxa7 Rbe8 18. Qe3 Kf8 19. Ne2 Rh6 20. Rg2 f5 21. Qg5 Qxg5 22. Rxg5 fxe4 23. fxe4 Rxe4 24. Rxh5 Rxh5 25. Ng3 Rd5 26. Rf1 Red4 27. c4 Ra5 28. a4 Rd2 29. Ne4 Rb2 30. c5 d5 31. Ng5 Rxb3 32. Ne6+ Kf7 33. Nd8+ Kf6 34. Nxc6 Rxc5 0-1

[Event "Olympiad-19 Final D"]
[Site "Siegen"]
[Date "1970.09.21"]
[Round "7"]
[White "Quinones, Oscar Carillo"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "C06"]
[PlyCount "49"]
[EventDate "1970.09.05"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Peru"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "PER"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4 f6 9. exf6 Nxf6 10. Nf3 Bb4+ 11. Bd2 Qb6 12. 0-0 Bd6 13. Bc3 0-0 14. Ng3 Bd7 15. Ne5 Be8 16. Rc1 Bxe5 17. dxe5 Nd7 18. Qc2 g6 19. Rfe1 d4 20. Bd2 Ncxe5 21. Bh6 Nxd3 22. Qxd3 Rf7 23. Ne4 Nf6 24. Ng5 Re7 25. Qa3 1-0

[Event "Olympiad-19 Final D"]
[Site "Siegen"]
[Date "1970.09.19"]
[Round "6"]
[White "Heidenfeld, Wolfgang"]
[Black "Andujar, Miguel"]
[Result "1-0"]
[ECO "B22"]
[PlyCount "79"]
[EventDate "1970.09.05"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Dominican Rep"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "DOM"]

1. e4 c5 2. c3 g6 3. Nf3 Bg7 4. d4 cxd4 5. cxd4 Nf6 6. Nc3 d6 7. Bc4 0-0 8. Bb3 Nc6 9. 0-0 Bg4 10. Be3 a6 11. h3 Bxf3 12. Qxf3 Rc8 13. Qe2 Nd7 14. Rfd1 Na5 15. Rac1 Nxb3 16. axb3 Re8 17. Bg5 Nb6 18. e5 Qd7 19. f4 d5 20. g4 Rc6 21. Qf3 f5 22. Rc2 Kh8 23. Rg2 Rg8 24. Qf2 Na8 25. Qh4 Bf8 26. Rd3 Nc7 27. Rdg3 Qe6 28. gxf5 Qxf5 29. Bxe7 Bxe7 30. Qxe7 Qxf4 31. Ne2 Qf8 32. Qh4 Qd8 33. Qh6 Qf8 34. Qe3 Ne6 35. Rf2 Qb4 36. Rgf3 Rc2 37. Rf6 Ng7 38. Rxg6 Qe1+ 39. Kg2 Rc1 40. Qxc1 1-0

[Event "Olympiad-19 Final D"]
[Site "Siegen"]
[Date "1970.09.18"]
[Round "5"]
[White "Nonaka"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "A90"]
[PlyCount "46"]
[EventDate "1970.09.05"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Japan"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "JPN"]
[BlackTeamCountry "IRL"]

1. d4 e6 2. c4 f5 3. g3 Nf6 4. Bg2 Bb4+ 5. Nd2 0-0 6. Ngf3 Qe8 7. Qa4 Nc6 8. d5 exd5 9. cxd5 Qe4 10. 0-0 Bxd2 11. Qxe4 fxe4 12. Nxd2 Nd4 13. Nxe4 Nxe2+ 14. Kh1 Nxd5 15. Nd6 Nf6 16. Nxc8 Raxc8 17. Be3 d5 18. Rae1 d4 19. Rxe2 dxe3 20. Rxe3 Rfe8 21. Rfe1 c6 22. Bh3 Rxe3 23. Rxe3 Rc7 1/2-1/2

[Event "Olympiad-19 Final D"]
[Site "Siegen"]
[Date "1970.09.17"]
[Round "4"]
[White "Lim, Kok Ann"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "A52"]
[PlyCount "31"]
[EventDate "1970.09.05"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Singapore"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "SIN"]
[BlackTeamCountry "IRL"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3 Bc5 5. e3 Nc6 6. Be2 Ngxe5 7. Nxe5 Nxe5 8. Nd2 0-0 9. Nf3 d6 10. Nxe5 dxe5 11. Qxd8 Rxd8 12. Bd2 Bf5 13. Bc3 f6 14. Rd1 c6 15. 0-0 Kf7 16. Rfe1 1/2-1/2

[Event "Olympiad-19 Final D"]
[Site "Siegen"]
[Date "1970.09.16"]
[Round "3"]
[White "Heidenfeld, Wolfgang"]
[Black "Dreyer, Kurt"]
[Result "1-0"]
[ECO "B02"]
[PlyCount "95"]
[EventDate "1970.09.05"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "South Africa"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "RSA"]

1. e4 Nf6 2. Nc3 d5 3. e5 d4 4. Nce2 d3 5. cxd3 Nd5 6. Nf3 Nc6 7. Ned4 Nxd4 8. Nxd4 e6 9. Nf3 Bd7 10. d4 Bc6 11. d3 Bb4+ 12. Bd2 Qe7 13. a3 Bxd2+ 14. Qxd2 Rd8 15. Be2 Nb6 16. 0-0 Bxf3 17. Bxf3 c6 18. Qa5 Rxd4 19. Qxa7 Qc7 20. Rac1 Rd7 21. Rc3 0-0 22. Rb3 Nc8 23. Qe3 Ne7 24. Be4 Rfd8 25. f4 Nd5 26. Qh3 g6 27. Qh4 Qa5 28. Qf2 Ne7 29. Rc1 Nf5 30. Rb4 Nd4 31. h3 Qa7 32. Kh2 c5 33. Rbc4 b6 34. Rf1 Rb8 35. a4 Rdd8 36. Qh4 Nf5 37. Qf2 Rd4 38. Bxf5 Rxc4 39. dxc4 exf5 40. Qc2 Rd8 41. Rd1 Qe7 42. Rd5 h5 43. Qd3 Rxd5 44. cxd5 Qh4 45. Qc3 Qe7 46. d6 Qd7 47. a5 bxa5 48. Qxc5 1-0

[Event "Olympiad-19 Preliminaries D"]
[Site "Siegen"]
[Date "1970.09.12"]
[Round "8"]
[White "Heidenfeld, Wolfgang"]
[Black "Csom, Istvan"]
[Result "1/2-1/2"]
[ECO "B22"]
[PlyCount "33"]
[EventDate "1970.09.05"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Hungary"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "HUN"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Na3 Nc7 6. g3 d5 7. exd6 Qxd6 8. Nc4 Qd5 9. Ne3 Qd8 10. d4 cxd4 11. Nxd4 Nxd4 12. cxd4 e6 13. Bg2 Be7 14. 0-0 0-0 15. d5 Nxd5 16. Nxd5 exd5 17. Qxd5 1/2-1/2

[Event "Olympiad-19 Preliminaries D"]
[Site "Siegen"]
[Date "1970.09.11"]
[Round "7"]
[White "Loheac Amoun, Frank"]
[Black "Heidenfeld, Wolfgang"]
[Result "0-1"]
[ECO "C02"]
[PlyCount "72"]
[EventDate "1970.09.05"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Lebanon"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "LBN"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. Bd3 Bb5 7. 0-0 Bxd3 8. Qxd3 Qa6 9. Ne1 Qxd3 10. Nxd3 Nd7 11. Be3 c4 12. Ne1 Ne7 13. g3 h5 14. Ng2 Nf5 15. h3 b5 16. a3 Nb6 17. Nd2 Na4 18. Rab1 Be7 19. g4 hxg4 20. hxg4 Nh4 21. f4 g6 22. Nf3 Nxg2 23. Kxg2 Kd7 24. Bf2 a6 25. Bg3 Rh7 26. Kf2 Rah8 27. Ke2 Bxa3 28. bxa3 Nxc3+ 29. Ke3 Nxb1 30. Rxb1 Rh1 31. Rxh1 Rxh1 32. Be1 Kc6 33. Bb4 Rd1 34. Bc5 c3 35. Bb4 c2 36. Bd2 Kd7 0-1

[Event "Olympiad-19 Preliminaries D"]
[Site "Siegen"]
[Date "1970.09.09"]
[Round "5"]
[White "Estimo, Samuel"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "C00"]
[PlyCount "157"]
[EventDate "1970.09.05"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Philippines"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "PHI"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. c4 d5 3. exd5 exd5 4. cxd5 Qxd5 5. Nc3 Qa5 6. Nf3 Nf6 7. Bc4 Be7 8. 0-0 0-0 9. Re1 Bd6 10. Nb5 Bg4 11. Qb3 Nc6 12. Ng5 Ne5 13. Bf1 Rae8 14. Nxd6 cxd6 15. Qb5 Nc4 16. Qxa5 Rxe1 17. Qc3 Be2 18. h3 Rxf1+ 19. Kh2 h6 20. d3 Ne5 21. Ne4 Nh5 22. d4 Nd3 23. Qc2 Re1 24. Bxh6 Rxa1 25. Qxe2 Ndf4 26. Bxf4 Nxf4 27. Qe3 Ng6 28. Nxd6 Rxa2 29. Nf5 Ra5 30. g4 Rd5 31. Qb3 Rd7 32. Qa4 Rfd8 33. Qxa7 Ne7 34. Ne3 Nc6 35. Qc5 Nxd4 36. Kg2 Ne6 37. Qe5 Rd2 38. Nf5 R8d7 39. b4 R2d5 40. Qe4 Rd2 41. Qe5 R2d5 42. Qb8+ Kh7 43. Qe8 Rd3 44. Ne7 Nf4+ 45. Kg1 Nxh3+ 46. Kh2 Nxf2 47. Qg8+ Kh6 48. Qh8+ Kg5 49. Qxg7+ Kf4 50. Qf6+ Ke3 51. Nf5+ Ke2 52. Qe5+ Kd1 53. Qa1+ Kc2 54. Qa2+ Kc3 55. Qa3+ Kc4 56. Qc1+ Kxb4 57. Qb2+ Ka5 58. Qa2+ Kb6 59. Qxf2+ Ka6 60. Qc5 b6 61. Qc8+ Ka7 62. Ne3 Re7 63. Ng2 Rd2 64. Kg3 Rd3+ 65. Kf4 Rd2 66. Nh4 Rf2+ 67. Kg3 Rd2 68. Nf5 Red7 69. Qc6 R2d5 70. Kh4 Rd2 71. Ne3 R2d6 72. Qc8 Rd3 73. Nc4 f6 74. Kh5 Rg7 75. Kh6 Rdd7 76. Nd6 b5 77. Qc5+ Ka6 78. Qxb5+ Ka7 79. Nc8+ 1-0

[Event "Olympiad-19 Preliminaries D"]
[Site "Siegen"]
[Date "1970.09.08"]
[Round "4"]
[White "Heidenfeld, Wolfgang"]
[Black "Johansson, Gunnar1111"]
[Result "1/2-1/2"]
[ECO "C54"]
[PlyCount "50"]
[EventDate "1970.09.05"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Sweden"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "SWE"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Bd2 Bxd2+ 8. Nbxd2 d5 9. exd5 Nxd5 10. 0-0 0-0 11. Bb3 Bg4 12. Qc2 Nf4 13. Rfe1 Nxd4 14. Nxd4 Qxd4 15. Re4 Qf6 16. Qxc7 Qxb2 17. Rae1 Qxd2 18. Qxf4 Qxf4 19. Rxf4 Be6 20. Bxe6 fxe6 21. Rb4 Rac8 22. Rxb7 Rc2 23. Rd1 Rf7 24. Rb8+ Rf8 25. Rb7 Rf7 1/2-1/2

[Event "Olympiad-19 Preliminaries D"]
[Site "Siegen"]
[Date "1970.09.06"]
[Round "2"]
[White "Heidenfeld, Wolfgang"]
[Black "Ghitescu, Theodor"]
[Result "0-1"]
[ECO "B22"]
[PlyCount "64"]
[EventDate "1970.09.05"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Romania"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "ROU"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Na3 g6 6. d4 cxd4 7. cxd4 Bg7 8. Qb3 Nb6 9. Bf4 d5 10. exd6 exd6 11. d5 Qe7+ 12. Be2 Ne5 13. 0-0 0-0 14. Nxe5 Bxe5 15. Bxe5 Qxe5 16. Bf3 Bd7 17. Rfe1 Qf6 18. Nb5 Bxb5 19. Qxb5 Rac8 20. Rac1 Qf4 21. Rxc8 Rxc8 22. Qe2 Rc1 23. h3 Nc4 24. b3 Rxe1+ 25. Qxe1 Nd2 26. Qe8+ Kg7 27. Qe7 Qf6 28. Qxb7 Qa1+ 29. Kh2 Qe5+ 30. Kg1 Qe1+ 31. Kh2 Qxf2 32. Bd1 Qf4+ 0-1

[Event "Olympiad-19 Preliminaries D"]
[Site "Siegen"]
[Date "1970.09.05"]
[Round "1"]
[White "Jakobsen, Ole"]
[Black "Heidenfeld, Wolfgang"]
[Result "0-1"]
[ECO "C07"]
[PlyCount "26"]
[EventDate "1970.09.05"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Denmark"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "DEN"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5 5. Ngf3 cxd4 6. Bc4 Qd6 7. 0-0 Nf6 8. Qe2 Nc6 9. Rd1 Be7 10. Nb3 e5 11. Bb5 Bg4 12. Bxc6+ bxc6 13. Qxe5 Qxe5 0-1

[Event "Castlebar Chess Festival"]
[Site "Castlebar"]
[Date "1969.08.31"]
[Round "7"]
[White "Heidenfeld, Wolfgang"]
[Black "McCurdy, Gerald"]
[Result "1-0"]
[ECO "B07"]
[PlyCount "69"]
[EventDate "1969.08.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ENG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5 Bg7 5. Qd2 0-0 6. Bh6 e5 7. Bxg7 Kxg7 8. dxe5 dxe5 9. 0-0-0 Qxd2+ 10. Rxd2 Be6 11. Nf3 Nbd7 12. Ng5 Nc5 13. Bd3 c6 14. g3 Rad8 15. f4 exf4 16. gxf4 h6 17. Nxe6+ Nxe6 18. f5 gxf5 19. exf5 Nf4 20. Rg1+ Kh8 21. Bc4 Rd7 22. Rxd7 Nxd7 23. Re1 Kg7 24. Re7 Nc5 25. b4 b5 26. Bxb5 cxb5 27. bxc5 b4 28. Ne4 Ne2+ 29. Kd2 Nd4 30. f6+ Kg6 31. Rxa7 Rd8 32. Kc1 Kf5 33. Nd6+ Kxf6 34. Rxf7+ Ke6 35. Rh7 1-0

[Event "Castlebar Chess Festival"]
[Site "Castlebar"]
[Date "1969.08.30"]
[Round "6"]
[White "Patterson, Nicholas J"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "D79"]
[PlyCount "39"]
[EventDate "1969.08.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ENG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. 0-0 0-0 5. c4 c6 6. d4 d5 7. cxd5 cxd5 8. Nc3 Nc6 9. Ne5 e6 10. Bg5 Qb6 11. Nxc6 Qxc6 12. Qb3 Bd7 13. Rfc1 Qb6 14. Qxb6 axb6 15. e3 Rfc8 16. Bf1 h6 17. Bf4 Ne8 18. g4 g5 19. Bg3 Bf8 20. a3 1/2-1/2

[Event "Castlebar Chess Festival"]
[Site "Castlebar"]
[Date "1969.08.29"]
[Round "5"]
[White "Aitken, James Macrae"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "D05"]
[PlyCount "61"]
[EventDate "1969.08.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ENG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. Bd3 c5 5. c3 cxd4 6. cxd4 Nc6 7. Ngf3 dxe4 8. Nxe4 Bb4+ 9. Nc3 Bd6 10. 0-0 Nb4 11. Bb1 0-0 12. Ne4 Be7 13. Nxf6+ Bxf6 14. a3 Nd5 15. Qd3 g6 16. Bh6 Bg7 17. Bg5 Qb6 18. Ba2 Bd7 19. Rfe1 Rac8 20. Qd2 Ba4 21. Rac1 Bb3 22. Bb1 Qd6 23. Bd3 a6 24. Bh6 Nb6 25. Bf4 Qd7 26. Qb4 Nd5 27. Qd6 Qxd6 28. Bxd6 Rfd8 29. Be5 Nf6 30. Bc7 Re8 31. Be5 1/2-1/2

[Event "Castlebar Chess Festival"]
[Site "Castlebar"]
[Date "1969.08.27"]
[Round "4"]
[White "Heidenfeld, Wolfgang"]
[Black "Grabow, Pouelsten Holm"]
[Result "0-1"]
[ECO "C10"]
[PlyCount "74"]
[EventDate "1969.08.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ENG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Be7 6. g3 Ngf6 7. Nxf6+ Bxf6 8. Bg2 0-0 9. 0-0 c5 10. c3 cxd4 11. Nxd4 Nb6 12. Nb5 Nd5 13. c4 Nb6 14. Qe2 Qe7 15. b3 Bxa1 16. Ba3 Qf6 17. Bxf8 Kxf8 18. Qd1 Be5 19. f4 Bb8 20. a4 Nd7 21. Qd3 g6 22. Rd1 a6 23. Nc3 Ba7+ 24. Kh1 Nc5 25. Qd6+ Kg7 26. Ne4 Nxe4 27. Bxe4 a5 28. Qc7 Qb2 29. Qxa5 Qxb3 30. Qe5+ f6 31. Qd6 Bc5 32. Qc7+ Kh6 33. Qd8 Be7 34. Qxe7 Qxd1+ 35. Kg2 Qe2+ 36. Kh3 e5+ 37. f5 Qxe4 0-1

[Event "Castlebar Chess Festival"]
[Site "Castlebar"]
[Date "1969.08.26"]
[Round "3"]
[White "Heidenfeld, Wolfgang"]
[Black "Ryan, S."]
[Result "1-0"]
[ECO "B12"]
[PlyCount "111"]
[EventDate "1969.08.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ENG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Ne2 e6 5. Ng3 Bg6 6. h4 f5 7. h5 Bf7 8. c4 Bb4+ 9. Bd2 Qa5 10. f4 Nh6 11. Bxb4 Qxb4+ 12. Qd2 Qxd2+ 13. Nxd2 a6 14. Rc1 0-0 15. Bd3 Rd8 16. Ne2 Ng4 17. cxd5 Rxd5 18. Nc4 Rd8 19. Nd6 Rxd6 20. exd6 Nf6 21. h6 g6 22. Nc3 Nbd7 23. Na4 Nd5 24. g3 Nb4 25. Bb1 Nd5 26. Nc5 Nxc5 27. dxc5 Be8 28. a3 Bd7 29. Kf2 Nf6 30. Rc3 Re8 31. Rb3 Bc8 32. Re1 Nd7 33. Rc3 Nf6 34. Kf3 Bd7 35. Ba2 Kf7 36. Rb3 Bc8 37. Rb4 Kf8 38. d7 Nxd7 39. Rxe6 Rxe6 40. Bxe6 Ke7 41. Bxd7 Kxd7 42. Rd4+ Ke7 43. Rd6 Be6 44. Ke3 Bb3 45. Kd4 Bg8 46. Ke5 Bf7 47. Rf6 Bg8 48. b4 Bf7 49. Rxf7+ Kxf7 50. Kd6 Kf6 51. Kc7 g5 52. Kxb7 Kg6 53. Kxc6 Kxh6 54. Kd6 gxf4 55. gxf4 Kh5 56. c6 1-0

[Event "Castlebar Chess Festival"]
[Site "Castlebar"]
[Date "1969.08.25"]
[Round "2"]
[White "Schnegelsberg, Niels"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C11"]
[PlyCount "44"]
[EventDate "1969.08.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ENG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Qb6 7. Ne2 f6 8. c3 Nc6 9. Qc2 cxd4 10. Nexd4 Nxd4 11. cxd4 Be7 12. Bd3 f5 13. Be3 Nf8 14. h3 Bd7 15. g4 g6 16. Kf2 Bb5 17. Bxb5+ Qxb5 18. g5 Nd7 19. h4 Nb6 20. b3 Rc8 21. Qd1 Ba3 22. h5 Kf7 1/2-1/2

[Event "Castlebar Chess Festival"]
[Site "Castlebar"]
[Date "1969.08.24"]
[Round "1"]
[White "Heidenfeld, Wolfgang"]
[Black "Eriksen, Oddvar"]
[Result "1/2-1/2"]
[ECO "B22"]
[PlyCount "84"]
[EventDate "1969.08.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ENG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nc6 3. d4 cxd4 4. cxd4 e6 5. Nc3 d6 6. Nf3 a6 7. Bd3 Be7 8. 0-0 Nf6 9. Qe2 e5 10. dxe5 dxe5 11. Rd1 Bg4 12. Be3 Qa5 13. Bc4 0-0 14. Nd5 Nxd5 15. exd5 Nb8 16. h3 Bxf3 17. Qxf3 Bd6 18. Bd3 Qd8 19. Qg4 g6 20. Bg5 Qd7 21. Qxd7 Nxd7 22. Rac1 f6 23. Be3 Rfc8 24. Kf1 Kf7 25. Ke2 f5 26. f3 Nc5 27. b3 Ke7 28. g4 f4 29. Bf2 Kd7 30. h4 Nxd3 31. Kxd3 Ba3 32. Rxc8 Rxc8 33. h5 g5 34. Ke4 Bd6 35. Rd2 Rc3 36. Re2 Ke7 37. Be1 Rc8 38. Kf5 h6 39. Kg6 Rg8+ 40. Kf5 Rc8 41. Kg6 Rg8+ 42. Kf5 Rc8 1/2-1/2

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1969.??.??"]
[Round "?"]
[White "Heidenfeld, Wolfgang"]
[Black "Patterson, Nicholas J"]
[Result "0-1"]
[ECO "B22"]
[PlyCount "90"]
[EventDate "1969.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Na3 g6 6. d4 cxd4 7. cxd4 Bg7 8. g3 d6 9. Bg2 Nc7 10. Nc4 dxe5 11. Nfxe5 0-0 12. 0-0 Be6 13. Nxc6 bxc6 14. Ne5 Qd6 15. Be3 Nd5 16. Nd3 h5 17. Qd2 Rad8 18. Rac1 Nxe3 19. fxe3 Bxd4 20. Rxc6 Bxe3+ 21. Qxe3 Qxd3 22. Qxa7 Qe2 23. Qf2 Qxf2+ 24. Rxf2 Rd1+ 25. Rf1 Rxf1+ 26. Kxf1 Bxa2 27. Rc7 e6 28. Ke2 Rb8 29. Rc2 h4 30. Ke3 hxg3 31. hxg3 Rb3+ 32. Kf2 Kg7 33. Bf1 Rb4 34. Ke3 Bd5 35. Bd3 f5 36. Kd2 Rg4 37. Rc1 Rb4 38. Kc3 Rb3+ 39. Kc2 Kf6 40. Ra1 g5 41. Ra5 Rb4 42. Kc3 Rg4 43. b4 Rxg3 44. Kd4 g4 45. Bc2 Rh3 0-1

[Event "Olympiad-18 Final C"]
[Site "Lugano"]
[Date "1968.11.06"]
[Round "13"]
[White "Heidenfeld, Wolfgang"]
[Black "Giustolisi, Alberto Mario"]
[Result "1/2-1/2"]
[ECO "B12"]
[PlyCount "21"]
[EventDate "1968.10.26"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Italy"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "ITA"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Ne2 e6 5. Ng3 Bg6 6. h4 h6 7. h5 Bh7 8. Bd3 Bxd3 9. Qxd3 c5 10. c3 Nc6 11. 0-0 1/2-1/2

[Event "Olympiad-18 Final C"]
[Site "Lugano"]
[Date "1968.11.05"]
[Round "12"]
[White "Feller, Joseph"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C14"]
[PlyCount "58"]
[EventDate "1968.10.26"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Luxembourg"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "LUX"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ng8 6. Be3 b6 7. Bb5+ c6 8. Bd3 Ba6 9. Qg4 g6 10. Bxa6 Nxa6 11. h4 h5 12. Qe2 Nb8 13. Nf3 Nd7 14. g3 Nh6 15. 0-0 Nf5 16. Bf4 Qc7 17. Nd1 0-0-0 18. a4 Kb7 19. b3 Nb8 20. Ne3 Bb4 21. Nxf5 gxf5 22. Qd3 Be7 23. a5 b5 24. c4 a6 25. Rfc1 Qd7 26. Rc2 Rc8 27. Kh2 Rc7 28. Rac1 Ba3 29. Rb1 Be7 1/2-1/2

[Event "Olympiad-18 Final C"]
[Site "Lugano"]
[Date "1968.11.04"]
[Round "11"]
[White "Heidenfeld, Wolfgang"]
[Black "Vizantiadis, Lazaros"]
[Result "0-1"]
[ECO "A03"]
[PlyCount "40"]
[EventDate "1968.10.26"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Greece"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "GRE"]

1. f4 d5 2. Nf3 c5 3. e3 Qc7 4. b3 Nf6 5. Bb2 Nbd7 6. Bb5 a6 7. Bxd7+ Nxd7 8. 0-0 f6 9. Nc3 Nb6 10. a4 Be6 11. Qe2 Bf7 12. d3 e6 13. a5 Nd7 14. e4 d4 15. Nd1 Bd6 16. g3 e5 17. f5 Nb8 18. Nd2 Nc6 19. Qg4 h5 20. Qxg7 Ke7 0-1

[Event "Olympiad-18 Final C"]
[Site "Lugano"]
[Date "1968.11.02"]
[Round "9"]
[White "Heidenfeld, Wolfgang"]
[Black "Bakali, Mustafa Ahmed"]
[Result "1-0"]
[ECO "B12"]
[PlyCount "45"]
[EventDate "1968.10.26"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Morocco"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "MAR"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Ne2 e6 5. Ng3 Bg6 6. h4 h6 7. h5 Bh7 8. c3 Qb6 9. Bd3 Bxd3 10. Qxd3 c5 11. 0-0 Nc6 12. Rd1 Rc8 13. Na3 cxd4 14. cxd4 Bxa3 15. bxa3 Na5 16. f4 Nc4 17. Rb1 Qc7 18. f5 Ne7 19. Rf1 b6 20. Qf3 exf5 21. Nxf5 Nxf5 22. Qxf5 Qd7 23. Qxd7+ 1-0

[Event "Olympiad-18 Final C"]
[Site "Lugano"]
[Date "1968.11.01"]
[Round "8"]
[White "Heyns, Anthon"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C14"]
[PlyCount "60"]
[EventDate "1968.10.26"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "South Africa"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "RSA"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Qd2 0-0 8. f4 c5 9. Nf3 Nc6 10. dxc5 Nxc5 11. Bd3 f6 12. 0-0 Bd7 13. Rae1 Nxd3 14. cxd3 fxe5 15. Nxe5 Nxe5 16. Rxe5 Qd6 17. Rfe1 Rf6 18. Qf2 Raf8 19. g3 b6 20. Qd4 Qc5 21. Qxc5 bxc5 22. d4 cxd4 23. Ne2 Rb8 24. b3 d3 25. Nd4 Rb4 26. Nf3 a5 27. R5e3 a4 28. Rxd3 axb3 29. Rxb3 Rxb3 30. axb3 Rf8 1/2-1/2

[Event "Olympiad-18 Final C"]
[Site "Lugano"]
[Date "1968.10.31"]
[Round "7"]
[White "Heidenfeld, Wolfgang"]
[Black "Cordovil, Joao Maria"]
[Result "1/2-1/2"]
[ECO "B06"]
[PlyCount "80"]
[EventDate "1968.10.26"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Portugal"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "POR"]

1. e4 d6 2. d4 g6 3. c3 Bg7 4. Be3 f5 5. exf5 Bxf5 6. Bd3 Qd7 7. Bxf5 Qxf5 8. Qf3 Nc6 9. Qxf5 gxf5 10. Nd2 e5 11. dxe5 dxe5 12. f3 Nge7 13. Nh3 0-0-0 14. 0-0-0 h6 15. Nb3 b6 16. Rxd8+ Rxd8 17. Rd1 Rd6 18. Rxd6 cxd6 19. f4 Kd7 20. Kd2 Ke6 21. g3 e4 22. Ng1 Nd5 23. Ne2 Nxe3 24. Kxe3 d5 25. Kd2 Kd6 26. Ke3 b5 27. a3 a5 28. Nbd4 Bxd4+ 29. cxd4 b4 30. a4 Ne7 31. Nc1 Nc8 32. b3 Nb6 33. Ne2 h5 34. h4 Nd7 35. Ng1 Nf6 36. Nh3 Ng4+ 37. Ke2 Ke7 38. Ng1 Nf6 39. Ke3 Nd7 40. Ne2 Nb6 1/2-1/2

[Event "Olympiad-18 Final C"]
[Site "Lugano"]
[Date "1968.10.30"]
[Round "6"]
[White "Ibrahimoglu, Ismet"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C14"]
[PlyCount "100"]
[EventDate "1968.10.26"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Turkey"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "TUR"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ng8 6. Be3 b6 7. Qg4 g6 8. Qd1 Ba6 9. Bxa6 Nxa6 10. Nf3 Qd7 11. Qe2 Nb8 12. 0-0 h5 13. Qd2 Nc6 14. a3 Bf8 15. b4 Bh6 16. Ne2 Nce7 17. Ng5 Nf5 18. Bf4 Nge7 19. h3 Bg7 20. Rac1 Qb5 21. c4 dxc4 22. Nc3 Qd7 23. Nce4 Qxd4 24. Qa2 b5 25. Rcd1 Qb6 26. Nf6+ Bxf6 27. exf6 Nc8 28. Rd8+ Kxd8 29. Nxf7+ Kd7 30. Nxh8 Ncd6 31. Nxg6 Rg8 32. Ne5+ Kc8 33. Qe2 Qb7 34. f3 Nh4 35. Nxc4 Rxg2+ 36. Qxg2 Nxg2 37. Bxd6 Nf4 38. Bxf4 Qd5 39. Ne5 Qd4+ 40. Rf2 Qxf4 41. f7 Kb7 42. Rg2 Qc1+ 43. Kh2 Qf4+ 44. Kh1 Qc1+ 45. Rg1 Qf4 46. Rg8 Qc1+ 47. Kg2 Qd2+ 48. Kg3 Qe1+ 49. Kf4 Qd2+ 50. Kg3 Qe1+ 1/2-1/2

[Event "Olympiad-18 Final C"]
[Site "Lugano"]
[Date "1968.10.29"]
[Round "5"]
[White "Johannessen, Svein"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "A12"]
[PlyCount "87"]
[EventDate "1968.10.26"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Norway"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "NOR"]
[BlackTeamCountry "IRL"]

1. c4 c6 2. Nf3 d5 3. b3 Bf5 4. Bb2 e6 5. g3 Nf6 6. Bg2 Nbd7 7. 0-0 Bd6 8. d3 Qc7 9. Nc3 0-0 10. Qd2 Bg6 11. Rac1 dxc4 12. bxc4 e5 13. Nh4 Rfe8 14. Nxg6 hxg6 15. e3 Rad8 16. d4 exd4 17. exd4 Bf8 18. Qc2 Nb6 19. Qb3 Qe7 20. Rfd1 Qb4 21. Bf1 a5 22. Rb1 Qxb3 23. axb3 Bb4 24. Bg2 Re7 25. Na2 Kf8 26. Nxb4 axb4 27. Bc1 Ne4 28. Bxe4 Rxe4 29. Bd2 c5 30. dxc5 Red4 31. cxb6 Rxd2 32. Rxd2 Rxd2 33. Ra1 Rd6 34. c5 Rc6 35. Ra7 Rxc5 36. Rxb7 Rb5 37. Kf1 Ke8 38. Ke2 Rf5 39. Ra7 Rb5 40. b7 Kd8 41. b8Q+ Rxb8 42. Rxf7 Rb6 43. Rxg7 Re6+ 44. Kf1 1-0

[Event "Olympiad-18 Final C"]
[Site "Lugano"]
[Date "1968.10.27"]
[Round "3"]
[White "Caro, Alberto Napoleon"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "A01"]
[PlyCount "73"]
[EventDate "1968.10.26"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Venezuela"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "VEN"]
[BlackTeamCountry "IRL"]

1. b3 e5 2. Bb2 d6 3. c4 f5 4. Nf3 Nf6 5. e3 Be7 6. d4 exd4 7. exd4 0-0 8. Bd3 Nc6 9. Nc3 Ng4 10. h3 Nh6 11. Nd5 Bf6 12. 0-0 a5 13. Qd2 Ne7 14. Nxf6+ Rxf6 15. d5 Ng6 16. Bxf6 Qxf6 17. Qg5 Kf7 18. Rfe1 Bd7 19. Qxf6+ Kxf6 20. Nd4 Nf7 21. g3 Nge5 22. Rad1 g5 23. f4 gxf4 24. gxf4 Ng6 25. Rf1 b6 26. Rde1 Nd8 27. Re3 Nb7 28. Kh2 Nc5 29. Ne2 h5 30. Rg1 h4 31. Kg2 c6 32. Kf3 cxd5 33. cxd5 b5 34. Nd4 b4 35. Bb5 Bxb5 36. Nxb5 Ne4 37. Nxd6 1-0

[Event "Olympiad-18 Final C"]
[Site "Lugano"]
[Date "1968.10.26"]
[Round "2"]
[White "Heidenfeld, Wolfgang"]
[Black "Kaplan, Julio P"]
[Result "1/2-1/2"]
[ECO "C49"]
[PlyCount "87"]
[EventDate "1968.10.26"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Puerto Rico"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "PUR"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. Nc3 Bb4 5. 0-0 0-0 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Bxc6 bxc6 10. Qd2 h6 11. Bxf6 Qxf6 12. Rfb1 Qe7 13. Qe3 c5 14. d4 cxd4 15. cxd4 exd4 16. Nxd4 Re8 17. f3 d5 18. Rb5 dxe4 19. Re1 Bd7 20. Rb7 Qd6 21. fxe4 c5 22. Nf3 Bc6 23. e5 Qd5 24. Rb3 c4 25. Rbb1 Rad8 26. Qxa7 Ra8 27. Qb6 Rxa2 28. Rbd1 Qb5 29. Qxb5 Bxb5 30. Nd4 Bd7 31. Re3 Ra5 32. Rde1 Rd5 33. c3 Ra8 34. R1e2 Bg4 35. Rb2 Ra3 36. Kf2 Bd1 37. Rd2 Bh5 38. e6 fxe6 39. Rb2 e5 40. Nc6 Kh7 41. Nxe5 Raa5 42. Nf3 Ra7 43. Re4 Rc5 44. Re5 1/2-1/2

[Event "Olympiad-18 Preliminaries D"]
[Site "Lugano"]
[Date "1968.10.24"]
[Round "7"]
[White "Heidenfeld, Wolfgang"]
[Black "Donner, Jan Hein"]
[Result "0-1"]
[ECO "C02"]
[PlyCount "88"]
[EventDate "1968.10.17"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "NED"]

1. e4 c5 2. c3 e6 3. d4 d5 4. e5 Nc6 5. Nf3 Nge7 6. Be3 Nf5 7. Bd3 Nxe3 8. fxe3 Be7 9. 0-0 0-0 10. Qc2 h6 11. Nbd2 Bd7 12. Rae1 Rc8 13. Qb1 b5 14. dxc5 Bxc5 15. Nb3 Be7 16. Nbd4 b4 17. cxb4 Bxb4 18. Re2 Qb6 19. Qd1 Nxd4 20. exd4 Rc7 21. Rff2 Rfc8 22. Rc2 Be7 23. Rxc7 Rxc7 24. Rc2 f5 25. Rxc7 Qxc7 26. Qd2 g5 27. Ne1 Qb6 28. Qf2 Bd8 29. Bb1 Bb5 30. h3 Qc6 31. Kh2 Qc1 32. Bd3 Ba5 33. b4 Bxb4 34. Nc2 Bxd3 35. Nxb4 Bb5 36. a4 Bxa4 37. Qa2 Qd1 38. Nxd5 Qxd4 39. Nf6+ Kf7 40. Qe2 Bc6 41. Qh5+ Kg7 42. Ne8+ Bxe8 43. Qxe8 Qxe5+ 44. Kh1 Qf6 0-1

[Event "Olympiad-18 Preliminaries D"]
[Site "Lugano"]
[Date "1968.10.23"]
[Round "6"]
[White "O'Kelly de Galway, Alberic"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "A21"]
[PlyCount "46"]
[EventDate "1968.10.17"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Belgium"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "BEL"]
[BlackTeamCountry "IRL"]

1. c4 f5 2. Nc3 Nf6 3. g3 d6 4. Bg2 e5 5. d3 Be7 6. b4 0-0 7. Qb3 c6 8. Nf3 a5 9. b5 Nbd7 10. Ba3 a4 11. Qb2 e4 12. Nd4 Ne5 13. f4 c5 14. Nc2 Nf7 15. Ne3 exd3 16. exd3 Ng4 17. Ned5 Bf6 18. h3 Re8+ 19. Kd2 Nf2 20. Rhe1 Bd4 21. Nc7 Ne4+ 22. Bxe4 Qxc7 23. Bd5 Bd7 1/2-1/2

[Event "Olympiad-18 Preliminaries D"]
[Site "Lugano"]
[Date "1968.10.22"]
[Round "5"]
[White "Rovira Mas, Jorge"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "B20"]
[PlyCount "100"]
[EventDate "1968.10.17"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. Qe2 c5 3. f4 Nc6 4. Nf3 g6 5. c3 Bg7 6. g3 d6 7. Bg2 Nge7 8. 0-0 0-0 9. d3 b6 10. a4 Ba6 11. Qc2 Rc8 12. Be3 d5 13. Rd1 d4 14. Bd2 c4 15. e5 cxd3 16. Qb3 Na5 17. Qa3 Nc4 18. Qb3 Ne3 19. Na3 Nxd1 20. Rxd1 Nf5 21. c4 Qd7 22. g4 Ne7 23. Bb4 Rfd8 24. Rxd3 Nc6 25. Nb5 Bxb5 26. axb5 Nxb4 27. Qxb4 Bf8 28. Qa4 a5 29. Nd2 Qc7 30. Bc6 f6 31. Ne4 fxe5 32. f5 exf5 33. gxf5 Bh6 34. Rg3 Be3+ 35. Kg2 Rd6 36. Nxd6 Qxd6 37. fxg6 hxg6 38. Be4 g5 39. Qd1 Rf8 40. Rxe3 Rf4 41. Bd5+ Kg7 42. Rf3 Qf6 43. b3 Kf8 44. Rxf4 gxf4 45. Qf3 Qg6+ 46. Kh3 Qh6+ 47. Kg2 Qg6+ 48. Kf2 Qc2+ 49. Ke1 d3 50. Qd1 Qc3+ 1/2-1/2

[Event "Olympiad-18 Preliminaries D"]
[Site "Lugano"]
[Date "1968.10.20"]
[Round "3"]
[White "Casa, Alex"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C14"]
[PlyCount "48"]
[EventDate "1968.10.17"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Monaco"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "MNC"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ng8 6. Be3 b6 7. Qg4 g6 8. h4 h5 9. Qg3 Ba6 10. Bxa6 Nxa6 11. a3 Qd7 12. Nf3 0-0-0 13. b4 Kb7 14. b5 Nb8 15. 0-0 Rc8 16. Rfb1 c5 17. Ne2 Bf8 18. c3 Nh6 19. Bg5 Nf5 20. Qf4 Bh6 21. a4 Bxg5 22. Nxg5 cxd4 23. cxd4 Rc4 24. Nf3 Rhc8 1/2-1/2

[Event "Olympiad-18 Preliminaries D"]
[Site "Lugano"]
[Date "1968.10.18"]
[Round "1"]
[White "Bilek, Istvan"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C00"]
[PlyCount "256"]
[EventDate "1968.10.17"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Hungary"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "HUN"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. Qe2 c5 3. Nf3 Nc6 4. g3 d6 5. Bg2 g6 6. 0-0 Bg7 7. c3 Nge7 8. d3 0-0 9. Nbd2 Qc7 10. Rd1 b6 11. Nc4 Ba6 12. Bf4 e5 13. Bc1 Rad8 14. a4 d5 15. exd5 Nxd5 16. Nfd2 Rfe8 17. Re1 f5 18. Na3 Na5 19. Nb5 Qb8 20. Nc4 Nxc4 21. dxc4 Nf6 22. a5 Bb7 23. Bxb7 Qxb7 24. axb6 axb6 25. Bg5 Rd7 26. Bxf6 Bxf6 27. Ra7 Qxa7 28. Nxa7 Rxa7 29. Rd1 Re6 30. Rd5 e4 31. Qd1 Be7 32. Rd7 Rxd7 33. Qxd7 Kf7 34. Qd5 h5 35. Kf1 Kf6 36. Ke2 Bf8 37. Qa8 Kf7 38. h3 Be7 39. Qd5 Kf6 40. Qa8 Kf7 41. Qb7 Kf6 42. Qc7 Kf7 43. Kd2 Rd6+ 44. Kc2 Re6 45. Qf4 Kg7 46. Qc7 Kf7 47. Kd1 Rd6+ 48. Kc2 Re6 49. g4 fxg4 50. hxg4 hxg4 51. Qf4+ Kg7 52. Qxg4 Kf7 53. Qh3 Kf6 54. Kd2 Kf7 55. Kc2 Bf8 56. Kb3 Be7 57. Ka4 Bf8 58. Kb5 Be7 59. Ka6 Kf6 60. Kb7 Kf7 61. Kc7 Kf6 62. Qh6 Kf7 63. Qd2 Bf8 64. b4 Be7 65. b5 Bf8 66. Qf4+ Ke8 67. Kc8 Be7 68. Qh2 Kf7 69. Qh7+ Kf6 70. Kc7 Bf8 71. Qh8+ Kf7 72. Qh4 Be7 73. Qh6 Bf8 74. Qf4+ Ke8 75. Kc8 Ke7 76. Qh2 Bg7 77. Qh4+ Ke8 78. Qh3 Ke7 79. Kc7 Be5+ 80. Kb7 Bg7 81. Kc8 Bf8 82. Qh8 Kf7 83. Qh4 Be7 84. Qh7+ Kf8 85. Qh2 Bf6 86. Kd7 Re7+ 87. Kc6 Re6+ 88. Kd5 Re5+ 89. Kd6 Kf7 90. Qh7+ Bg7 91. Qxg7+ Kxg7 92. Kxe5 Kf7 93. Kd5 Kf6 94. Kc6 g5 95. Kxb6 g4 96. Kxc5 e3 97. fxe3 g3 98. b6 g2 99. b7 g1Q 100. b8Q Qxe3+ 101. Kb4 Qc1 102. Qd6+ Kg5 103. Qd5+ Kh4 104. c5 Qb2+ 105. Qb3 Qf2 106. Qc4+ Kh3 107. Kb3 Qe3 108. Qd5 Kh2 109. Kc2 Qf2+ 110. Qd2 Kh1 111. c6 Qf5+ 112. Kc1 Qe5 113. Qd1+ Kh2 114. Qf3 Qg5+ 115. Kc2 Qg6+ 116. Kb2 Qd6 117. Kb3 Qc7 118. Kc4 Kg1 119. Qd5 Kh2 120. Qd2+ Kh1 121. Qd1+ Kh2 122. Qd7 Qf4+ 123. Kb3 Qb8+ 124. Kc2 Qg8 125. Qd6+ Kh1 126. Kb2 Qg2+ 127. Kb3 Qg8+ 128. c4 Qg3+ 1/2-1/2

[Event "EU-chT 04th Group2"]
[Site "Copenhagen"]
[Date "1967.10.17"]
[Round "5.2"]
[White "Unzicker, Wolfgang"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C14"]
[PlyCount "78"]
[EventDate "1967.10.14"]
[EventType "team-tourn"]
[EventRounds "6"]
[EventCountry "DEN"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "German Fed Rep"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ng8 6. Be3 b6 7. Qg4 g6 8. Nf3 Ba6 9. 0-0-0 Bxf1 10. Rhxf1 h5 11. Qg3 Qd7 12. Bg5 Nc6 13. Qf4 Bxg5 14. Nxg5 Nd8 15. h3 c6 16. g4 Qe7 17. Qd2 Nh6 18. Rh1 Nb7 19. f4 0-0-0 20. Qe2 hxg4 21. hxg4 Rde8 22. Rh4 f6 23. exf6 Qxf6 24. Qe5 Qe7 25. Qe1 Nf7 26. Rxh8 Nxh8 27. Qe5 Nf7 28. Nxf7 Qxf7 29. Rh1 Kd7 30. Nb1 Nd6 31. Nd2 Rf8 32. b3 c5 33. Rf1 Qf6 34. Qxf6 Rxf6 35. g5 Rf8 36. Nf3 Nf7 37. Rh1 cxd4 38. Rh7 Kd6 39. Nh4 Rh8 1/2-1/2

[Event "EU-chT 04th Group2"]
[Site "Copenhagen"]
[Date "1967.10.16"]
[Round "4.1"]
[White "Andersen, Borge"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "A11"]
[PlyCount "71"]
[EventDate "1967.10.14"]
[EventType "team-tourn"]
[EventRounds "6"]
[EventCountry "DEN"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Denmark"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "DEN"]
[BlackTeamCountry "IRL"]

1. c4 Nf6 2. g3 c6 3. Bg2 d5 4. Nf3 g6 5. b3 Bg7 6. Bb2 0-0 7. 0-0 Nbd7 8. d3 Re8 9. Nbd2 e5 10. e3 e4 11. Ne1 Nc5 12. cxd5 cxd5 13. dxe4 dxe4 14. Rc1 Nd3 15. Nxd3 exd3 16. Rc4 Qa5 17. Ra4 Qc7 18. Qa1 Nh5 19. Bxg7 Nxg7 20. Ne4 Nh5 21. Rc1 Qe7 22. Rd4 Rd8 23. Rd1 Bf5 24. R1xd3 Rxd4 25. Rxd4 Bxe4 26. Rxe4 Qd7 27. Rd4 Qe7 28. Qc3 Rf8 29. Bf3 Ng7 30. Qd2 b6 31. Rd7 Qa3 32. Bd5 Nf5 33. e4 Ne7 34. Bc4 Qc5 35. Qc3 Rc8 36. Qf6 1-0

[Event "EU-chT 04th Group2"]
[Site "Copenhagen"]
[Date "1967.10.15"]
[Round "2.2"]
[White "Heidenfeld, Wolfgang"]
[Black "Unzicker, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C69"]
[PlyCount "60"]
[EventDate "1967.10.14"]
[EventType "team-tourn"]
[EventRounds "6"]
[EventCountry "DEN"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "German Fed Rep"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 f6 6. d4 Bg4 7. c3 Bd6 8. Be3 Ne7 9. Nbd2 Qc8 10. Qc2 0-0 11. c4 exd4 12. Nxd4 c5 13. N4b3 b6 14. f4 Nc6 15. Nf3 Qe8 16. Rae1 Rd8 17. h3 Bxf3 18. Rxf3 Nb4 19. Qb1 Qa4 20. Nc1 Rfe8 21. b3 Qd7 22. Bf2 a5 23. Ne2 a4 24. Nc3 axb3 25. axb3 c6 26. Rd1 Qe6 27. Bg3 Bc7 28. e5 Rxd1+ 29. Qxd1 Rd8 30. Qe2 f5 1/2-1/2

[Event "EU-chT 04th Group2"]
[Site "Copenhagen"]
[Date "1967.10.14"]
[Round "1.1"]
[White "Heidenfeld, Wolfgang"]
[Black "Andersen, Borge"]
[Result "1/2-1/2"]
[ECO "B22"]
[PlyCount "50"]
[EventDate "1967.10.14"]
[EventType "team-tourn"]
[EventRounds "6"]
[EventCountry "DEN"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Denmark"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "DEN"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Na3 d6 6. exd6 e6 7. d4 Bxd6 8. Nc4 0-0 9. Nxd6 Qxd6 10. Be2 Rd8 11. 0-0 Nf4 12. Be3 cxd4 13. Nxd4 Nxd4 14. Bxd4 e5 15. Bxe5 Qe7 16. Qxd8+ Qxd8 17. Bxf4 Qf6 18. Rfd1 Be6 19. Rd4 Re8 20. Be3 h6 21. b3 Qe5 22. Bf3 b5 23. Rad1 Qc7 24. c4 bxc4 25. bxc4 Qa5 1/2-1/2

[Event "IRL-ch"]
[Site "Cork"]
[Date "1967.07.??"]
[Round "?"]
[White "Heidenfeld, Wolfgang"]
[Black "Maher, Vincent"]
[Result "1-0"]
[ECO "C01"]
[PlyCount "107"]
[EventDate "1967.07.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "IRL"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd3 c5 5. exd5 exd5 6. dxc5 Nf6 7. Nge2 0-0 8. 0-0 Bxc5 9. Bg5 Be6 10. Nf4 Nc6 11. Ncxd5 Bxd5 12. Nxd5 Qxd5 13. Bxf6 Bd4 14. Bxd4 Qxd4 15. c3 Qh4 16. Re1 Rae8 17. Bb5 Re6 18. Bxc6 Rxc6 19. Re3 Re6 20. Rxe6 fxe6 21. Qe2 e5 22. f3 Qf6 23. Qe3 b6 24. Re1 Re8 25. Qe4 g5 26. Rd1 Kg7 27. Rd5 a5 28. g3 h6 29. Kg2 Re6 30. Qd3 Re7 31. Rd6 Re6 32. Rd8 Re7 33. Qd5 Rf7 34. Re8 g4 35. Qxe5 Qxe5 36. Rxe5 Rd7 37. Re2 gxf3+ 38. Kxf3 Kf6 39. Kf4 Rd1 40. b3 Rc1 41. c4 a4 42. Rb2 a3 43. Rd2 Ke6 44. Ke4 Rb1 45. Kd4 Kd6 46. Kc3+ Kc6 47. b4 Kc7 48. Rf2 h5 49. Rf7+ Kd6 50. Rh7 Rb2 51. Rxh5 Rxa2 52. Kb3 Ra1 53. Rd5+ Kc6 54. Rd2 1-0

[Event "IRL-ch"]
[Site "Cork"]
[Date "1967.07.??"]
[Round "4"]
[White "Heidenfeld, Wolfgang"]
[Black "Patterson, Nicholas J"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "181"]
[EventDate "1967.07.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "IRL"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 c5 2. c3 e6 3. d4 d5 4. e5 Ne7 5. Nf3 Nbc6 6. Be3 Nf5 7. Bd3 cxd4 8. cxd4 Nxe3 9. fxe3 Be7 10. 0-0 0-0 11. Nc3 Bd7 12. Rc1 f5 13. exf6 Rxf6 14. e4 Nxd4 15. Nxd4 Qb6 16. Bb1 Bc5 17. Nce2 Bb5 18. Rxf6 Bxe2 19. Qxe2 Bxd4+ 20. Rf2 Rf8 21. Rcf1 h5 22. exd5 exd5 23. Qc2 Qh6 24. Kh1 Bxf2 25. Rxf2 Rxf2 26. Qxf2 Qc1+ 27. Qg1 Qxb2 28. Qd1 Qe5 29. g3 d4 30. Qd3 Kf7 31. Kg2 Ke7 32. Qe4 Qxe4+ 33. Bxe4 b5 34. Kh3 b4 35. Kh4 a5 36. Bc2 Kd6 37. Kxh5 Kc5 38. Kg6 Kc4 39. Kxg7 Kc3 40. Bb3 Kb2 41. h4 d3 42. h5 a4 43. Bxa4 Kxa2 44. h6 b3 45. Bxb3+ Kxb3 46. h7 d2 47. h8Q d1Q 48. Qb8+ Ka3 49. Qa7+ Kb2 50. Qb6+ Ka3 51. Qe3+ Kb2 52. Qe5+ Ka3 53. Kf6 Qd2 54. Kf5 Qd3+ 55. Kf4 Qf1+ 56. Kg5 Qc1+ 57. Kf6 Qh6+ 58. Kf7 Qh7+ 59. Kf8 Qh6+ 60. Qg7 Qc6 61. Qe7+ Kb3 62. Qe3+ Ka2 63. Qe2+ Ka3 64. g4 Qh6+ 65. Kf7 Qf4+ 66. Kg6 Qd6+ 67. Kh5 Qd5+ 68. g5 Qf5 69. Qe3+ Ka4 70. Kh6 Qf8+ 71. Kg6 Qg8+ 72. Kf5 Qf7+ 73. Kg4 Qg7 74. Qe4+ Ka3 75. g6 Qd7+ 76. Kg5 Qd8+ 77. Kf5 Qf8+ 78. Kg4 Qc8+ 79. Kg3 Qc7+ 80. Kf3 Qg7 81. Ke3 Kb3 82. Qd3+ Ka2 83. Kd2 Qh6+ 84. Kc2 Qh2+ 85. Qd2 Qc7+ 86. Kd1+ Kb3 87. Qd3+ Kb2 88. Qd4+ Kb1 89. g7 Qc1+ 90. Ke2 Qc2+ 91. Ke1 1-0

[Event "IRL-ch"]
[Site "Cork"]
[Date "1967.07.??"]
[Round "6"]
[White "O'Riordan, Kenneth"]
[Black "Heidenfeld, Wolfgang"]
[Result "0-1"]
[ECO "A85"]
[PlyCount "64"]
[EventDate "1967.07.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "IRL"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. d4 e6 2. c4 f5 3. Nf3 Nf6 4. Nc3 Bb4 5. e3 0-0 6. Bd3 d6 7. Qc2 Qe8 8. 0-0 Bxc3 9. bxc3 Qg6 10. Ba3 Re8 11. g3 Qh5 12. Nh4 g5 13. Be2 Qh6 14. Ng2 Nbd7 15. f3 Nf8 16. c5 d5 17. Kf2 Ng6 18. Rh1 e5 19. h4 f4 20. gxf4 exf4 21. Rag1 fxe3+ 22. Nxe3 g4 23. Bc1 Qf8 24. Nf5 Ne4+ 25. fxe4 Rxe4 26. h5 Bxf5 27. hxg6 Rxe2+ 28. Qxe2 Bd3+ 29. Ke1 Bxe2 30. gxh7+ Kh8 31. Kxe2 Re8+ 32. Be3 Qf3+ 0-1

[Event "Olympiad-17 Final C"]
[Site "Havana"]
[Date "1966.11.18"]
[Round "13"]
[White "Colon Romero, Miguel"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "A52"]
[PlyCount "29"]
[EventDate "1966.11.04"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Puerto Rico"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "PUR"]
[BlackTeamCountry "IRL"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 Nxe5 5. Nf3 Nbc6 6. Nxe5 Nxe5 7. Be3 Bb4+ 8. Nd2 Qe7 9. Be2 Bc5 10. Bxc5 Qxc5 11. 0-0 d6 12. Qc2 Nc6 13. Nb3 Nd4 14. Nxd4 Qxd4 15. Rad1 1/2-1/2

[Event "Olympiad-17 Final C"]
[Site "Havana"]
[Date "1966.11.15"]
[Round "11"]
[White "Heidenfeld, Wolfgang"]
[Black "Schorr, Leon"]
[Result "0-1"]
[ECO "C29"]
[PlyCount "50"]
[EventDate "1966.11.04"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Venezuela"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "VEN"]

1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. d3 Nxc3 6. bxc3 Be7 7. Nf3 0-0 8. Be2 c5 9. 0-0 Nc6 10. Qe1 f6 11. d4 fxe5 12. dxe5 Bf5 13. Bd3 Qe8 14. Qg3 Qh5 15. Bf4 c4 16. Bxf5 Rxf5 17. Rab1 b6 18. Be3 Raf8 19. Bd4 Nd8 20. Rb5 Ne6 21. h3 Nf4 22. Qg4 Qe8 23. e6 Ne2+ 24. Kh2 Nxd4 25. Nxd4 Bd6+ 0-1

[Event "Olympiad-17 Final C"]
[Site "Havana"]
[Date "1966.11.14"]
[Round "10"]
[White "Durao, Joaquim Manuel"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "C05"]
[PlyCount "83"]
[EventDate "1966.11.04"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Portugal"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "POR"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. f4 c5 6. c3 Nc6 7. Ndf3 Qb6 8. g3 cxd4 9. cxd4 Bb4+ 10. Kf2 0-0 11. Kg2 f5 12. Bd3 Be7 13. Ne2 Rd8 14. h3 Nf8 15. g4 Bd7 16. Kh2 g6 17. Rg1 Kf7 18. Rg2 Rdc8 19. Be3 Na5 20. Nc3 Nc4 21. Bxc4 Rxc4 22. gxf5 gxf5 23. Nd2 Ng6 24. Nxc4 dxc4 25. Qh5 Kg7 26. Rag1 Be8 27. Bf2 Qc6 28. d5 exd5 29. Ne2 Bc5 30. Qxf5 Bxf2 31. Rxf2 Bd7 32. Qh5 Qb6 33. Rfg2 Rf8 34. Nd4 Rxf4 35. e6 Qd6 36. Rxg6+ hxg6 37. Qxg6+ Kf8 38. Kh1 Ke7 39. Qg5+ Ke8 40. Qg8+ Rf8 41. exd7+ Kxd7 42. Qg4+ 1-0

[Event "Olympiad-17 Final C"]
[Site "Havana"]
[Date "1966.11.13"]
[Round "9"]
[White "Heidenfeld, Wolfgang"]
[Black "Myagmarsuren, Lhamsuren"]
[Result "0-1"]
[ECO "C56"]
[PlyCount "68"]
[EventDate "1966.11.04"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Mongolia"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "MGL"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. 0-0 Nxe4 6. Nc3 Nxc3 7. bxc3 d5 8. Re1+ Be7 9. Bb5 0-0 10. Nxd4 Nxd4 11. cxd4 Bf5 12. Bd3 Bxd3 13. Qxd3 Bf6 14. Rb1 Re8 15. Bf4 Rxe1+ 16. Rxe1 Qd7 17. h3 c6 18. Qe3 h6 19. c3 Kf8 20. Be5 Bxe5 21. dxe5 b6 22. Qd3 Kg8 23. f4 Re8 24. f5 c5 25. f6 g6 26. c4 d4 27. Re4 Qf5 28. g4 Qg5 29. Qe2 Qc1+ 30. Kg2 Re6 31. Qf3 Qxc4 32. Rxd4 Qxd4 33. Qa8+ Kh7 34. Qf8 Rxf6 0-1

[Event "Olympiad-17 Final C"]
[Site "Havana"]
[Date "1966.11.12"]
[Round "8"]
[White "Vizantiadis, Lazaros"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C14"]
[PlyCount "26"]
[EventDate "1966.11.04"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Greece"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "GRE"]
[BlackTeamCountry "IRL"]

1. d4 d5 2. Nc3 Nf6 3. Bg5 e6 4. e4 Be7 5. exd5 Nxd5 6. Bxe7 Qxe7 7. Qd2 Nd7 8. Nxd5 exd5+ 9. Qe2 Nf6 10. Qxe7+ Kxe7 11. Bd3 Ne4 12. f3 Nd6 13. Kd2 Bf5 1/2-1/2

[Event "Olympiad-17 Final C"]
[Site "Havana"]
[Date "1966.11.08"]
[Round "5"]
[White "Heidenfeld, Wolfgang"]
[Black "Suer, Nevzat"]
[Result "1-0"]
[ECO "C56"]
[PlyCount "143"]
[EventDate "1966.11.04"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Turkey"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "TUR"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. 0-0 Nxe4 6. Nc3 Nd6 7. Nd5 Be7 8. Re1 0-0 9. Nxe7+ Nxe7 10. Bg5 Re8 11. Qe2 Kf8 12. Qd3 Kg8 13. Bb3 h6 14. Re2 hxg5 15. Rae1 Ne4 16. Qxe4 d5 17. Qxd5 Qxd5 18. Bxd5 Kf8 19. Nxg5 Bg4 20. Nh7+ Kg8 21. Rxe7 Rxe7 22. Rxe7 Kxh7 23. Rxc7 Bf5 24. Bxf7 Rd8 25. f3 Rd6 26. Kf2 Rb6 27. b3 Kh6 28. Bd5 Ra6 29. a4 b6 30. g4 Ra5 31. Bc6 Bxc2 32. b4 Re5 33. f4 Re3 34. g5+ Kh7 35. Bd7 Rc3 36. Rxa7 Kg6 37. Ra6 Be4 38. Rxb6+ Kh5 39. Bb5 Kh4 40. Rb8 Kg4 41. Rd8 Kxf4 42. Rxd4 Rh3 43. Kg1 Ke3 44. Rc4 Rh4 45. Rc3+ Kf4 46. Rg3 Rh8 47. Be2 Rd8 48. Kf2 Rd4 49. Rb3 Bc2 50. Rb2 Bxa4 51. h4 Kf5 52. Kg3 Bd1 53. Bxd1 Rxd1 54. b5 Rd3+ 55. Kg2 Kg4 56. Rb4+ Kh5 57. b6 g6 58. Rb2 Rd8 59. b7 Rb8 60. Kf3 Kxh4 61. Kf4 Rf8+ 62. Ke5 Rb8 63. Kf6 Kh5 64. Rh2+ Kg4 65. Rh7 Rd8 66. Rc7 Rd6+ 67. Kg7 Rb6 68. Kh6 Rb1 69. Kxg6 Rb6+ 70. Kf7 Kxg5 71. Ke7 Kf5 72. Kd7 1-0

[Event "Olympiad-17 Final C"]
[Site "Havana"]
[Date "1966.11.06"]
[Round "3"]
[White "Heidenfeld, Wolfgang"]
[Black "Naranja, Renato"]
[Result "1-0"]
[ECO "B22"]
[PlyCount "45"]
[EventDate "1966.11.04"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Philippines"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "PHI"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 e6 5. Nf3 Nc6 6. Be3 cxd4 7. cxd4 Nf6 8. Nc3 Bb4 9. Be2 0-0 10. 0-0 Qa5 11. Qc2 Nd5 12. Rac1 Bd7 13. Nxd5 Qxd5 14. Ng5 g6 15. Bc4 Qa5 16. Rfd1 Rac8 17. Qe2 Be7 18. d5 exd5 19. Rxd5 Qc7 20. Bb3 Bxg5 21. Bxg5 Rfe8 22. Qd2 Be6 23. Bf6 1-0

[Event "Olympiad-17 Final C"]
[Site "Havana"]
[Date "1966.11.05"]
[Round "2"]
[White "Philippe, Georges"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "A21"]
[PlyCount "75"]
[EventDate "1966.11.04"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Luxembourg"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "LUX"]
[BlackTeamCountry "IRL"]

1. c4 e5 2. Nc3 d6 3. g3 f5 4. Bg2 Nf6 5. d3 Be7 6. Nf3 0-0 7. 0-0 a5 8. a3 Nbd7 9. Bd2 Nc5 10. Qc2 a4 11. Be3 Nb3 12. Rab1 Bd7 13. Nd2 f4 14. gxf4 exf4 15. Bxf4 Ng4 16. Bg3 Nd4 17. Qd1 h5 18. e3 Nc6 19. h3 h4 20. hxg4 hxg3 21. Bd5+ Kh8 22. f4 g5 23. Kg2 Kg7 24. f5 Rh8 25. Rh1 Rh4 26. d4 Qh8 27. Kxg3 Bf6 28. Nf3 Re8 29. Ne4 Qh6 30. Nxf6 Kxf6 31. e4 Rh8 32. Nxh4 gxh4+ 33. Kf3 h3 34. Bxc6 Bxc6 35. d5 h2 36. Qd4+ Kf7 37. Qf2 Bd7 38. Rbd1 1-0

[Event "Olympiad-17 Final C"]
[Site "Havana"]
[Date "1966.11.04"]
[Round "1"]
[White "Heidenfeld, Wolfgang"]
[Black "Tatai, Stefano"]
[Result "1/2-1/2"]
[ECO "B27"]
[PlyCount "57"]
[EventDate "1966.11.04"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Italy"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "ITA"]

1. e4 c5 2. c3 g6 3. d4 cxd4 4. cxd4 d5 5. exd5 Nf6 6. Nc3 Bg7 7. Bb5+ Nbd7 8. Nf3 0-0 9. 0-0 Nb6 10. Qb3 Nfxd5 11. a4 Nxc3 12. bxc3 Be6 13. Qc2 Rc8 14. a5 Nd5 15. Bd2 Bf5 16. Qb3 Nf6 17. Bf4 Be6 18. Qa3 Ne4 19. Rac1 Nd6 20. Be2 Bd5 21. Nd2 b5 22. axb6 axb6 23. c4 Bb7 24. d5 Nf5 25. Nf3 Nd4 26. Nxd4 Bxd4 27. Rfd1 Ra8 28. Qb3 Bc5 29. Qb2 1/2-1/2

[Event "Olympiad-17 Preliminaries D"]
[Site "Havana"]
[Date "1966.11.03"]
[Round "7"]
[White "Heidenfeld, Wolfgang"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "B23"]
[PlyCount "50"]
[EventDate "1966.10.26"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "CUB"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Argentina"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "ARG"]

1. e4 c5 2. Nc3 d6 3. f4 Nc6 4. Bb5 Bd7 5. Nf3 g6 6. Bxc6 Bxc6 7. 0-0 Bg7 8. d3 Nf6 9. Qe1 0-0 10. Bd2 e6 11. Qh4 Nh5 12. Qh3 f5 13. Ng5 Qd7 14. Rae1 Rae8 15. g4 Bd4+ 16. Be3 fxg4 17. Qxg4 e5 18. f5 Nf4 19. Bxd4 cxd4 20. Rxf4 exf4 21. Qxf4 Rxf5 22. exf5 Rxe1+ 23. Kf2 Re5 24. Nce4 Rxf5 25. Nf6+ Kh8 0-1

[Event "Olympiad-17 Preliminaries D"]
[Site "Havana"]
[Date "1966.10.30"]
[Round "5"]
[White "Dreyer, Kurt"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C00"]
[PlyCount "30"]
[EventDate "1966.10.26"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "CUB"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "South Africa"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "RSA"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. d3 d5 3. Nc3 dxe4 4. dxe4 Qxd1+ 5. Nxd1 Nc6 6. c3 b6 7. Be3 Bb7 8. f3 0-0-0 9. Nf2 e5 10. Ngh3 f6 11. Be2 g6 12. Rd1 Rxd1+ 13. Kxd1 Bh6 14. Ng4 Bxe3 15. Nxe3 Nge7 1/2-1/2

[Event "Olympiad-17 Preliminaries D"]
[Site "Havana"]
[Date "1966.10.29"]
[Round "4"]
[White "Heidenfeld, Wolfgang"]
[Black "Larsen, Bent"]
[Result "1/2-1/2"]
[ECO "B22"]
[PlyCount "92"]
[EventDate "1966.10.26"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "CUB"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Denmark"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "DEN"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Na3 g6 6. g3 Bg7 7. Bg2 0-0 8. 0-0 d6 9. exd6 Qxd6 10. d4 cxd4 11. Nb5 Qc5 12. Nbxd4 Rd8 13. Qa4 Nb6 14. Qb5 Qxb5 15. Nxb5 e5 16. Bg5 f6 17. Bc1 Bf5 18. Na3 Na4 19. Re1 Rd7 20. Bf1 Rad8 21. Bb5 Nc5 22. Be3 Nd3 23. Bxd3 Bxd3 24. Rac1 h6 25. Red1 f5 26. Ne1 Ba6 27. Rxd7 Rxd7 28. b4 Bf8 29. Nec2 Bd3 30. b5 Ne7 31. c4 Nc8 32. c5 a6 33. bxa6 Bxa6 34. Nb4 Be2 35. Nc4 Bg7 36. c6 bxc6 37. Nxc6 e4 38. N4e5 Rd6 39. Nd4 Ba6 40. f4 Ne7 41. Nb3 Rd5 42. Nc6 Nxc6 43. Rxc6 Be2 44. Rc8+ Kf7 45. Rc7+ Kg8 46. Rc8+ Kf7 1/2-1/2

[Event "Olympiad-17 Preliminaries D"]
[Site "Havana"]
[Date "1966.10.28"]
[Round "3"]
[White "Mazzoni, Guy"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C05"]
[PlyCount "46"]
[EventDate "1966.10.26"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "CUB"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "France"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "FRA"]
[BlackTeamCountry "IRL"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. f4 c5 6. c3 Nc6 7. Ndf3 Qb6 8. g3 cxd4 9. cxd4 Bb4+ 10. Kf2 0-0 11. a3 Be7 12. b4 f5 13. Kg2 Re8 14. h4 Nf8 15. Be3 Bd7 16. Bd3 Rec8 17. Ne2 h5 18. Nd2 Nd8 19. Nb3 Ba4 20. Qb1 Bxb3 21. Qxb3 g6 22. Nc3 Qc6 23. Rhc1 Qd7 1/2-1/2

[Event "Olympiad-17 Preliminaries D"]
[Site "Havana"]
[Date "1966.10.27"]
[Round "2"]
[White "Heidenfeld, Wolfgang"]
[Black "Clarke, Peter Hugh"]
[Result "1/2-1/2"]
[ECO "C13"]
[PlyCount "49"]
[EventDate "1966.10.26"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "CUB"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "England"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "ENG"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 dxe4 5. Nxe4 Be7 6. Bxf6 Bxf6 7. Nf3 Nd7 8. Nxf6+ Qxf6 9. Bd3 c5 10. c3 cxd4 11. Nxd4 a6 12. 0-0 0-0 13. Qh5 g6 14. Qh6 Qg7 15. Qxg7+ Kxg7 16. f4 Nf6 17. Rad1 b6 18. Be2 Bb7 19. Bf3 Bxf3 20. Rxf3 Rac8 21. Nc2 Rfd8 22. Rfd3 Rxd3 23. Rxd3 Nd5 24. g3 Kf6 25. Kf2 1/2-1/2

[Event "Olympiad-17 Preliminaries D"]
[Site "Havana"]
[Date "1966.10.26"]
[Round "1"]
[White "Letelier Martner, Rene"]
[Black "Heidenfeld, Wolfgang"]
[Result "0-1"]
[ECO "C14"]
[PlyCount "114"]
[EventDate "1966.10.26"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "CUB"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Chile"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "IRL"]

1. d4 e6 2. e4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ng8 6. Be3 b6 7. Nf3 Ba6 8. Bxa6 Nxa6 9. Qe2 Nb8 10. 0-0 Qd7 11. Rfe1 Nc6 12. Nb1 Bd8 13. Nbd2 Nge7 14. c3 Nf5 15. Bg5 Bxg5 16. Nxg5 h6 17. Nh3 0-0-0 18. Qa6+ Kb8 19. b4 Nfxd4 20. b5 Nc2 21. Qa4 N6b4 22. cxb4 Nxa1 23. Rxa1 d4 24. Qb3 Qxb5 25. Nc4 d3 26. a4 Qd5 27. Rd1 g5 28. f3 Qc6 29. Nf2 Rd4 30. Ne3 d2 31. Ne4 Rhd8 32. b5 Qd7 33. Qb2 Rxe4 34. fxe4 Qd3 35. Nf1 Qxe4 36. Rxd2 Rxd2 37. Nxd2 Qxa4 38. h3 Qd1+ 39. Kh2 Qe2 40. Qd4 Qxb5 41. Qd8+ Kb7 42. Qf6 Qb4 43. Nf3 Qf4+ 44. Kg1 Qxf6 45. exf6 a5 46. Ne5 a4 47. Nxf7 Kc8 48. Nd6+ Kd7 49. Nb5 c6 50. Nd4 a3 51. f7 a2 52. f8N+ Ke8 53. Nb3 Kxf8 54. Kf2 Ke7 55. Ke3 Kd6 56. Kd4 c5+ 57. Kc3 Ke5 0-1

[Event "IRL-ch"]
[Site "Belfast"]
[Date "1966.07.??"]
[Round "?"]
[White "Moles, John L"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "C11"]
[PlyCount "53"]
[EventDate "1966.07.09"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "IRL"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Nf3 c5 6. dxc5 Nc6 7. Bf4 Bxc5 8. Bd3 f6 9. exf6 Nxf6 10. 0-0 0-0 11. Qe2 Bd6 12. Bg3 Bxg3 13. hxg3 Qe7 14. Rae1 Bd7 15. Nb5 Rac8 16. c3 Rfe8 17. Nbd4 a6 18. a3 Qd6 19. Nxc6 Rxc6 20. Ne5 Rb6 21. g4 Bb5 22. c4 dxc4 23. Bxc4 Qd4 24. Rd1 Qe4 25. Rfe1 Bxc4 26. Qxe4 Nxe4 27. Nxc4 1-0

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1964.07.14"]
[Round "4"]
[White "Heidenfeld, Wolfgang"]
[Black "Reilly, Brian Patrick"]
[Result "1-0"]
[ECO "B12"]
[PlyCount "93"]
[EventDate "1964.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Ne2 e6 5. Ng3 Bg6 6. h4 h6 7. h5 Bh7 8. c3 c5 9. Bd3 Bxd3 10. Qxd3 Nc6 11. 0-0 Qb6 12. Rd1 cxd4 13. cxd4 Nge7 14. Nc3 Nb4 15. Qe2 Nec6 16. Be3 Be7 17. a3 Na6 18. b4 Nc7 19. Qg4 Bf8 20. Na4 Qb5 21. Nc5 Ne7 22. Rdc1 0-0-0 23. a4 Qe8 24. b5 Kb8 25. Qe2 Nc8 26. Rab1 Nb6 27. a5 Bxc5 28. Rxc5 Nc4 29. b6 axb6 30. axb6 Na6 31. Rxc4 dxc4 32. Ne4 Qc6 33. Nc5 Nxc5 34. dxc5 Rd3 35. Qa2 Rhd8 36. Qxc4 Rd1+ 37. Rxd1 Rxd1+ 38. Kh2 Ra1 39. Qd4 Ra4 40. Qd8+ Qc8 41. Qd6+ Ka8 42. Qc7 Qb8 43. g3 Rc4 44. Qxf7 Qxe5 45. Bf4 Rxf4 46. gxf4 Qb8 47. Kg3 1-0

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1964.07.12"]
[Round "2"]
[White "Heidenfeld, Wolfgang"]
[Black "O'Brien, Richard"]
[Result "1-0"]
[ECO "B12"]
[PlyCount "71"]
[EventDate "1964.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Ne2 e6 5. Ng3 Bg6 6. h4 h6 7. h5 Bh7 8. c3 Nd7 9. Bd3 Bxd3 10. Qxd3 c5 11. f4 cxd4 12. cxd4 Bb4+ 13. Bd2 Qb6 14. Bxb4 Qxb4+ 15. Nc3 Ne7 16. 0-0 a6 17. f5 Rc8 18. Rf2 Rc4 19. Rd1 Qb6 20. b3 Rc8 21. Rdf1 Qc6 22. Nd1 exf5 23. Nxf5 Nxf5 24. Qxf5 0-0 25. Qg4 Qe6 26. Rf5 Rc2 27. Ne3 Rxa2 28. R1f3 f6 29. Rg3 Ra1+ 30. Kh2 Rf7 31. Qf3 fxe5 32. Rxf7 Qxf7 33. Nf5 Kh8 34. Rxg7 Qe6 35. Qg4 Nf6 36. Rh7+ 1-0

[Event "Zonal Enschede"]
[Site "Enschede"]
[Date "1963.10.25"]
[Round "17"]
[White "Heidenfeld, Wolfgang"]
[Black "Darga, Klaus"]
[Result "0-1"]
[ECO "B22"]
[PlyCount "68"]
[EventDate "1963.10.04"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Na3 d6 6. exd6 e5 7. Bb5 Bxd6 8. 0-0 0-0 9. d3 Nce7 10. Nc4 a6 11. Nxd6 Qxd6 12. Bc4 Bg4 13. Qe2 Ng6 14. Bxd5 Qxd5 15. Qe4 Bxf3 16. gxf3 Rad8 17. Be3 f5 18. Qc4 Rf7 19. Qxd5 Rxd5 20. c4 Rxd3 21. Bxc5 Rfd7 22. b4 Rxf3 23. Rfd1 Rfd3 24. Rxd3 Rxd3 25. Rc1 Nf4 26. Kf1 Rd2 27. Be3 Rxa2 28. Bxf4 exf4 29. Kg2 Rb2 30. Kf3 Rxb4 31. Kxf4 b5 32. Kxf5 Rxc4 33. Rd1 Rc8 34. f4 b4 0-1

[Event "Zonal Enschede"]
[Site "Enschede"]
[Date "1963.10.23"]
[Round "16"]
[White "Philippe, Georges"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "A10"]
[PlyCount "60"]
[EventDate "1963.10.04"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. c4 f5 2. b4 e6 3. Bb2 Nf6 4. a3 a5 5. c5 axb4 6. axb4 Rxa1 7. Bxa1 Be7 8. e3 0-0 9. Nf3 Nd5 10. Qb3 b6 11. Nc3 Nxc3 12. Bxc3 bxc5 13. bxc5 Ba6 14. d4 Bxf1 15. Kxf1 Nc6 16. Ke2 Qe8 17. Qb7 Qa8 18. Qxa8 Rxa8 19. Rb1 d6 20. Rb7 Ra7 21. Rxa7 Nxa7 22. Ba5 dxc5 23. Bxc7 Nb5 24. Bb6 cxd4 25. Nxd4 Nxd4+ 26. Bxd4 Bd6 27. f4 Kf7 28. Kf3 Bb4 29. h3 g6 30. e4 Ba3 1/2-1/2

[Event "Zonal Enschede"]
[Site "Enschede"]
[Date "1963.10.22"]
[Round "15"]
[White "Heidenfeld, Wolfgang"]
[Black "Durao, Joaquim Manuel"]
[Result "1/2-1/2"]
[ECO "C28"]
[PlyCount "60"]
[EventDate "1963.10.04"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6 4. d3 Bb4 5. Nge2 Na5 6. Bb3 c6 7. Bg5 h6 8. Bxf6 Qxf6 9. 0-0 g5 10. d4 d6 11. Qd3 Bxc3 12. Qxc3 b6 13. Ba4 0-0 14. b4 Ba6 15. bxa5 Bxe2 16. dxe5 dxe5 17. Rfe1 Bb5 18. Bxb5 cxb5 19. axb6 axb6 20. Qb3 Rfc8 21. Rad1 b4 22. Re2 Ra3 23. Qxb4 Rxa2 24. Qb3 Qe6 25. Qxe6 fxe6 26. f3 Rcxc2 27. Rxc2 Rxc2 28. Rb1 Rc6 29. Rb5 Kf7 30. Kf2 Ke7 1/2-1/2

[Event "Zonal Enschede"]
[Site "Enschede"]
[Date "1963.10.21"]
[Round "14"]
[White "Pomar Salamanca, Arturo"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "A52"]
[PlyCount "45"]
[EventDate "1963.10.04"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 Nxe5 5. f4 Nec6 6. Be3 Bb4+ 7. Nd2 Qh4+ 8. g3 Qe7 9. Bg2 a5 10. Ne2 Na6 11. 0-0 d6 12. Nb3 Bg4 13. h3 Bxe2 14. Qxe2 a4 15. a3 axb3 16. axb4 Ncxb4 17. e5 0-0-0 18. c5 d5 19. c6 Nxc6 20. Rxa6 Nb8 21. Ra8 d4 22. Bf2 Qb4 23. Qg4+ 1-0

[Event "Zonal Enschede"]
[Site "Enschede"]
[Date "1963.10.19"]
[Round "13"]
[White "Heidenfeld, Wolfgang"]
[Black "Aitken, James Macrae"]
[Result "1/2-1/2"]
[ECO "C27"]
[PlyCount "62"]
[EventDate "1963.10.04"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Qxe5+ Qe7 6. Qxe7+ Bxe7 7. Bd3 b6 8. Nh3 Na6 9. Nd5 Bd8 10. 0-0 0-0 11. b3 Nc5 12. Be2 c6 13. Ne3 Bf6 14. Rb1 Re8 15. f3 Ndb7 16. c3 d5 17. d4 Bxh3 18. gxh3 Nd7 19. Bd3 g6 20. Bd2 Bg7 21. Rbe1 Re6 22. Nc2 Rae8 23. Nb4 Nd8 24. Rxe6 Rxe6 25. Re1 c5 26. Nc2 Rxe1+ 27. Bxe1 cxd4 28. cxd4 Ne6 29. Bf2 Nb8 30. Bb5 a6 31. Bf1 b5 1/2-1/2

[Event "Zonal Enschede"]
[Site "Enschede"]
[Date "1963.10.18"]
[Round "12"]
[White "Penrose, Jonathan"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "C14"]
[PlyCount "81"]
[EventDate "1963.10.04"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 f6 7. Qh5+ Kf8 8. exf6 Nxf6 9. Qe2 c5 10. dxc5 Na6 11. 0-0-0 Nxc5 12. Qe3 Qb6 13. Nh3 Bd7 14. h5 Nce4 15. Nxe4 Qxe3+ 16. Bxe3 Nxe4 17. h6 Bf6 18. Bd3 Bc6 19. Nf4 Kf7 20. Nh5 g6 21. Nxf6 Nxf6 22. Bd4 Rhe8 23. Rde1 Nd7 24. f4 b6 25. c3 Nc5 26. Bc2 Ne4 27. a4 Re7 28. b3 Ke8 29. g4 Kd7 30. Rhf1 Rf7 31. Bd1 Ke7 32. Rf3 Bb7 33. Be2 Rc8 34. Kc2 Nf6 35. f5 gxf5 36. gxf5 Ne4 37. fxe6 Kxe6 38. Rxf7 Kxf7 39. Rg1 Rg8 40. Bh5+ Kf8 41. Rf1+ 1-0

