[Event "Cambridge Invitation A"]
[Site "Cambridge"]
[Date "1971.10.26"]
[Round "1"]
[White "Donner, Jan Hein"]
[Black "Botterill, George Steven"]
[Result "0-1"]
[ECO "D91"]
[WhiteElo "2500"]
[Annotator "Botterill"]
[PlyCount "112"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5 Ne4 6. cxd5 Nxg5 7. Nxg5 e6 8.
Nf3 exd5 9. e3 O-O 10. Be2 (10. b4) 10... Qd6 11. O-O c6 12. a3 Be6 13. Na4 Nd7
14. b4 Rfc8 15. Nc5 b6 16. Na6 c5 17. bxc5 (17. Qa4 c4 18. b5) 17... bxc5 18.
Qa4 (18. Nxc5 Nxc5 19. dxc5 Qxc5 20. Nd4 Rab8) 18... c4 19. Rfb1 Rc6 20. Nb4
Rb6 21. Ne1 a5 22. Na2 Bf8 (22... Rxb1 23. Rxb1 Nb6 24. Qb5 Qxa3) 23. Nc3 Rxb1
24. Nxb1 Qb6 25. Qc2 Rb8 26. Nc3 Qc6 (26... Qb2 27. Qxb2 Rxb2 28. Bd1) 27. Bd1
Nb6 (27... Rb3 28. Qc1 Nb6 29. Bxb3 cxb3 30. Nd3 Nc4 31. Ne5) 28. Qc1 Bd7 29.
g3 Bd6 30. Nf3 Bf5 31. Ne1 h5 32. Bf3 Kg7 33. h4 Rd8 34. Ng2 Bg4 35. Bxg4 hxg4
36. Qc2 (36. Qd1 f5 37. Qc2) 36... Rb8 37. e4 dxe4 38. Nxe4 Re8 39. Nxd6 Qxd6
40. Qc3 Rc8 41. Ne3 (41. d5+ Qf6 42. Qxf6+ Kxf6 43. Ne3 Ke5) 41... Nd5 42. Nxd5
Qxd5 43. Re1 (43. Qe3) 43... Rb8 44. Rc1 Re8 45. Qd2 Re4 46. Rd1 f5 47. Qg5 c3
48. h5 Re6 49. hxg6 c2 50. Rf1 (50. Rc1 Qf3) 50... Re8 51. Qf4 Rh8 52. f3 gxf3
53. Qc7+ Kxg6 54. Rf2 Qxd4 55. Qc6+ Kg5 56. Qxc2 Qa1+ (56... Qa1+ 57. Rf1 Rh1+
58. Kxh1 Qxf1+ 59. Kh2 Qe2+) 0-1

[Event "Cambridge Invitation A"]
[Site "Cambridge"]
[Date "1971.10.26"]
[Round "1"]
[White "Hartston, William Roland"]
[Black "Keene, Raymond Dennis"]
[Result "1/2-1/2"]
[ECO "B15"]
[WhiteElo "2390"]
[BlackElo "2465"]
[Annotator "Keene"]
[PlyCount "46"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. e4 g6 2. Nc3 c6 3. d4 d5 4. Nf3 Bg7 (4... Bg4 5. h3 Bxf3 6. Qxf3 dxe4 7.
Nxe4 Qxd4 8. Bd2) 5. h3 dxe4 6. Nxe4 Nf6 7. Nxf6+ exf6 8. Bc4 (8. Be2 O-O 9.
O-O Re8) 8... O-O 9. O-O Nd7 (9... Re8 10. c3 Nd7 11. Qb3) 10. Re1 Nb6 11. Bf1
(11. Bb3 a5 12. a3 a4 13. Ba2 Qc7 14. c4 Be6) 11... Be6 12. b3 Re8 13. c4 Qd7
14. Bb2 Bf5 15. Rxe8+ Rxe8 16. Qd2 Be4 17. Ne1 h5 18. Rd1 Nc8 19. Bc3 (19. f3
Bf5 20. g4 hxg4 21. hxg4 Be6 (21... Bxg4 22. fxg4 Qxg4+ 23. Ng2 Bh6 24. Qxh6
Qxd1 25. d5 Qf3 26. Qf4) 22. d5 cxd5 23. cxd5 Rd8 24. Bc4 b5 25. dxe6 Qxd2 26.
exf7+ Kh7 27. Rxd2 Rxd2 28. Bc3 bxc4 29. Bxd2 cxb3 30. axb3 Nd6) 19... Nd6 20.
d5 (20. f3 Bf5 21. g4 hxg4 22. hxg4 Bxg4 23. fxg4 Qxg4+ 24. Ng2 Ne4) 20... c5 (
20... cxd5 21. f3 Nf5 22. Qf2 (22. fxe4 Bh6 23. Qb2 Be3+ 24. Kh2 Qc7+) 22...
Bh6 23. Bd2) 21. Qb2 Qe7 22. Nd3 Bxd3 23. Bxd3 b6 (23... b6 24. Kf1 (24. Re1
Qxe1+) 24... Qd8 (24... Qc7 25. Bxf6 (25. Kg1 Qe7) 25... Nxc4 26. bxc4 Qh2) 25.
Re1 Rxe1+ 26. Kxe1 Ne8) 1/2-1/2

[Event "Cambridge Invitation A"]
[Site "Cambridge"]
[Date "1971.10.27"]
[Round "2"]
[White "Hartston, William Roland"]
[Black "Donner, Jan Hein"]
[Result "1/2-1/2"]
[ECO "B99"]
[WhiteElo "2390"]
[BlackElo "2500"]
[PlyCount "107"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3
Qc7 9. O-O-O Nbd7 10. Be2 b5 11. e5 Bb7 12. Qg3 dxe5 13. fxe5 Qxe5 14. Bf4 Qc5
15. Be3 Qe5 16. Bf4 Qc5 17. Be3 Qc8 18. Rhf1 O-O 19. Bf3 Nc5 20. Nb3 Nfe4 21.
Nxe4 Nxe4 22. Qe1 f5 23. Nd2 Bd5 24. Bxe4 fxe4 25. Rxf8+ Qxf8 26. Qg3 Bf6 27.
Rf1 Qe7 28. Qg4 Rf8 29. Kb1 Qb4 30. Nb3 Qc4 31. Re1 a5 32. Qe2 Qxe2 33. Rxe2 a4
34. Nd2 Be5 35. g3 Rf5 36. a3 h5 37. Kc1 g5 38. Rf2 g4 39. c3 h4 40. Rg2 hxg3
41. hxg3 Rh5 42. Nf1 Bc4 43. Nh2 Rh3 44. Nxg4 Rxg3 45. Rxg3 Bxg3 46. Nf6+ Kf7
47. Nxe4 Bc7 48. Kd2 Kg6 49. Nf2 Kf5 50. Nd1 Ke4 51. Bc5 Kd5 52. Ba7 Bf4+ 53.
Ne3+ Kc6 54. Bd4 1/2-1/2

[Event "Cambridge Invitation A"]
[Site "Cambridge"]
[Date "1971.10.27"]
[Round "2"]
[White "Keene, Raymond Dennis"]
[Black "Botterill, George Steven"]
[Result "1/2-1/2"]
[ECO "D80"]
[WhiteElo "2465"]
[Annotator "Keene"]
[PlyCount "53"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5 Ne4 5. Bh4 Nxc3 6. bxc3 c5 7. e3 Qa5 8. Qb3
cxd4 9. exd4 Nc6 10. Nf3 Be6 11. c5 (11. Be2) 11... Bg7 12. Bb5 O-O 13. O-O Bf6
14. Bg3 (14. Bxf6 exf6 15. Ne1) 14... Rfc8 15. Bd3 b6 16. cxb6 axb6 17. Rfc1
Qa7 18. Re1 Qa3 (18... Na5 19. Qc2 Nc4 20. Bxg6 hxg6 21. Rxe6 fxe6 22. Qxg6+
Kf8 23. Bf4 Bg7 24. Ng5 Nd6 25. Nxe6+) 19. Qxb6 Qxc3 20. Ba6 Nxd4 21. Bxc8
Nxf3+ 22. gxf3 Rxc8 23. Kg2 d4 (23... Qa3 24. Rad1) 24. Rxe6 fxe6 (24... Qxa1
25. Rxf6 exf6 26. Qxf6 Re8 27. Be5 Rxe5 28. Qxe5) 25. Qxe6+ Kg7 26. Be5 Bxe5 (
26... Qc5 27. Rc1 Qxc1 28. Qxe7+ Kh6 29. Bxf6) 27. Qxe5+ 1/2-1/2

[Event "Cambridge Invitation A"]
[Site "Cambridge"]
[Date "1971.10.28"]
[Round "3"]
[White "Botterill, George Steven"]
[Black "Hartston, William Roland"]
[Result "1-0"]
[ECO "B82"]
[BlackElo "2390"]
[PlyCount "127"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 Qb6 7. Nb3 e6 8.
O-O Be7 9. Be3 Qc7 10. Bd3 a6 11. f4 b5 12. Qf3 O-O 13. Rae1 Bb7 14. Qh3 Nb4
15. a3 Nxd3 16. cxd3 e5 17. Rc1 Qd8 18. Qf3 Rc8 19. h3 Ba8 20. Na1 exf4 21.
Qxf4 Nd7 22. Rfd1 Ne5 23. Nb3 h6 24. Nd4 Bg5 25. Qf2 g6 26. Qd2 d5 27. Bxg5
hxg5 28. Qf2 g4 29. Qg3 Re8 30. Kh2 dxe4 31. dxe4 Qg5 32. h4 Qe7 33. Nd5 Bxd5
34. Rxc8 Rxc8 35. exd5 f6 36. Re1 Qc5 37. Rxe5 Qxd4 (37... fxe5 38. Qxe5) 38.
Re6 Rd8 39. Qc7 Qxd5 40. Rxf6 Rd7 41. Qf4 Kg7 42. Rxa6 Qf5 43. Qxf5 gxf5 44.
Rb6 Rd2 45. Rxb5 Kf6 46. Kg3 Rd3+ 47. Kf4 Rd4+ 48. Ke3 Re4+ 49. Kf2 Rd4 50. Rb4
Rd3 51. a4 Ke5 52. g3 Rf3+ 53. Kg2 Rd3 54. Rf4 Rb3 55. Rf2 Rb4 56. a5 Ra4 57.
b4 Rxb4 58. Ra2 Rb7 59. a6 Ra7 60. Ra4 Kf6 61. Kf2 Kg6 62. Ke3 Kf6 63. Kf4 Kg6
64. Ra5 1-0

[Event "Cambridge Invitation A"]
[Site "Cambridge"]
[Date "1971.10.28"]
[Round "3"]
[White "Donner, Jan Hein"]
[Black "Keene, Raymond Dennis"]
[Result "1-0"]
[ECO "A56"]
[WhiteElo "2500"]
[BlackElo "2465"]
[Annotator "Keene"]
[PlyCount "96"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Nbd7 6. Nf3 Be7 7. Bd3 Nf8 8. h3 h5
9. g3 Ng6 10. h4 Bd7 11. a3 a6 12. Ng5 Rb8 13. Qe2 Qc7 (13... Qc8) 14. Kf1 Nh7
15. Nh3 Qc8 16. Kg2 Bxh4 17. gxh4 Nxh4+ 18. Kg3 Bg4 19. Qf1 Bf3 (19... Nf3) 20.
Rg1 Bg2 21. Qxg2 (21. Rxg2 Qg4+ 22. Kh2 Nf3+ 23. Kh1 Qxh3+ 24. Rh2 Qxh2#) 21...
Nxg2 22. Kxg2 Nf6 23. f3 Kf8 24. Bd2 g6 25. Ng5 Kg7 26. Bf1 h4 27. a4 Nh5 28.
Ne2 Qd8 29. Kf2 Qb6 30. Bc3 Qb3 31. a5 b5 32. axb6 Rxb6 33. f4 Re8 34. fxe5
dxe5 35. Nf3 Rf6 (35... Qc2) 36. Ke3 h3 (36... Rxf3+ 37. Kxf3 Qc2) 37. Bxh3 Kg8
38. Rg5 Rxf3+ 39. Kxf3 Qxc4 40. Rd1 Nf6 41. Ng3 Nh7 42. Rg4 Qb3 43. Rd2 a5 44.
Bf1 a4 45. Rd3 Qc2 46. Nf5 c4 47. Re3 Qd1+ 48. Be2 Qh1+ 1-0

[Event "Cambridge Invitation B"]
[Site "Cambridge"]
[Date "1971.10.26"]
[Round "1"]
[White "Bellin, Robert"]
[Black "Eales, Richard Geoffrey"]
[Result "1/2-1/2"]
[ECO "B02"]
[Annotator "Eales"]
[PlyCount "51"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Bc4 c6 6. Nc3 d6 7. cxd6 (7. Qb3 Nd7
) 7... exd6 8. Nxd5 cxd5 9. Bxd5 dxe5 10. Qb3 Qc7 11. Nf3 Bd6 12. O-O O-O 13.
d3 Nd7 (13... Nc6) 14. Be3 Nf6 15. Rac1 Qe7 16. Bg5 h6 17. Bxf6 Qxf6 18. Nd2
Rb8 19. Rc3 Rd8 20. Rfc1 Bf5 21. Ne4 Qe7 22. h3 Bg6 23. Nxd6 Rxd6 24. Rc7 Rd7
25. Rxd7 Qxd7 26. Be4 1/2-1/2

[Event "Cambridge Invitation B"]
[Site "Cambridge"]
[Date "1971.10.26"]
[Round "1"]
[White "Cafferty, Bernard"]
[Black "Williams, Arthur Howard"]
[Result "1/2-1/2"]
[ECO "A28"]
[WhiteElo "2440"]
[Annotator "Williams, A Howard"]
[PlyCount "62"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. d4 e4 5. Nd2 Bb4 6. e3 O-O 7. g3 (7. Qc2)
7... Bxc3 8. bxc3 Re8 9. Bg2 d6 10. O-O Bg4 11. Qc2 (11. Qb3) (11. f3) 11...
Be2 12. Re1 Bd3 13. Qa4 Qd7 (13... a6) (13... Nd7) 14. Ba3 Qf5 15. h3 Nd7 16.
c5 dxc5 17. Bxc5 Nxc5 18. dxc5 Re6 19. g4 Qe5 20. Rac1 h5 21. Nxe4 Bxe4 22. f4
Qf6 (22... Qxc5 23. Bxe4 Rae8 24. Bxc6 Rxe3 25. Rxe3 Qxe3+ 26. Kh2 bxc6) (22...
Qd5 23. Rcd1 Bxg2 24. Rxd5 Bxd5) 23. Bxe4 Qh4 24. Bg2 Rae8 (24... hxg4 25. f5)
25. Qd1 Rxe3 26. Rxe3 Rxe3 27. Qd2 Qg3 (27... Qe7) 28. Qf2 Rxc3 29. Qxg3 Rxg3
30. gxh5 Ra3 31. Rb1 Nd8 1/2-1/2

[Event "Cambridge Invitation B"]
[Site "Cambridge"]
[Date "1971.10.27"]
[Round "2"]
[White "Eales, Richard Geoffrey"]
[Black "Williams, Arthur Howard"]
[Result "1/2-1/2"]
[ECO "B89"]
[PlyCount "44"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 e6 7. Be3 Be7 8. a3
O-O 9. O-O Bd7 10. Ba2 Nxd4 11. Bxd4 Bc6 12. Qe2 (12. Qd3 Qa5 13. f4 e5 14. Be3
Ng4 15. Nd5 Bxd5 16. Bxd5 Nxe3 17. Qxe3) 12... e5 13. Be3 Nxe4 14. Nd5 Nf6 15.
Rad1 Nxd5 16. Bxd5 Qa5 17. Qf3 Rac8 18. Rd2 Kh8 19. Qd1 a6 (19... Bxd5 20. Rxd5
Qa4 21. c3 Qxd1) 20. c3 Qb5 21. a4 Qa5 22. Qb3 Bxd5 (22... Bxd5 23. Rxd5 Qc7
24. Rfd1 f5 25. f4 e4 26. R1d4) 1/2-1/2

[Event "Cambridge Invitation B"]
[Site "Cambridge"]
[Date "1971.10.28"]
[Round "3"]
[White "Cafferty, Bernard"]
[Black "Eales, Richard Geoffrey"]
[Result "1/2-1/2"]
[ECO "D80"]
[WhiteElo "2440"]
[PlyCount "69"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 d5 3. d4 g6 4. Bg5 Ne4 5. Bh4 Nxc3 6. bxc3 dxc4 7. e3 Bg7 8.
Bxc4 c5 9. Ne2 O-O 10. O-O Nc6 11. Rb1 Na5 12. Bd3 Be6 13. Qa4 b6 14. Rfd1 cxd4
15. cxd4 Qd6 16. Bg3 Bd7 17. Qc2 Qa3 18. Rdc1 Rac8 19. Qd2 Be6 20. Nc3 Nc4 21.
Bxc4 Bxc4 22. Rb2 Rc6 23. Nb1 Qa6 24. Rbc2 Rfc8 25. Qb4 Bf8 26. Qb2 e6 27. f3
Qb5 28. Qxb5 Bxb5 29. Rxc6 Rxc6 30. Rxc6 Bxc6 31. Bb8 Bb4 32. Bxa7 Bd5 33. Bxb6
Bxa2 34. Bc5 Bxc5 35. Nc3 1/2-1/2

[Event "Cambridge Invitation B"]
[Site "Cambridge"]
[Date "1971.10.28"]
[Round "3"]
[White "Williams, Arthur Howard"]
[Black "Bellin, Robert"]
[Result "1-0"]
[ECO "A99"]
[Annotator "Williams, A Howard"]
[PlyCount "77"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. Nf3 f5 2. d4 Nf6 3. g3 e6 4. Bg2 Be7 5. O-O O-O 6. c4 d6 7. Nc3 a5 8. b3 Qe8
9. Bb2 c6 10. Rc1 Bd7 11. e3 Na6 12. Ne2 Qh5 13. Nf4 Qh6 14. c5 d5 15. Ne5 Bc8
16. Bc3 Nb8 17. f3 Nbd7 18. Ned3 Nh5 19. a4 (19. Qd2) 19... Bd8 20. Nxh5 Qxh5
21. Bd2 Bc7 22. Nf4 Qf7 23. e4 dxe4 24. fxe4 e5 25. Ne2 Nf6 26. exf5 Qh5 27.
dxe5 Bxe5 28. Bf4 Bxf5 29. Bxe5 Ng4 (29... Bg4 30. Bxf6 Bxe2 31. Bf3) 30. h3
Nxe5 (30... Ne3 31. Nf4) 31. g4 Bxg4 (31... Nxg4 32. Ng3) 32. hxg4 Nxg4 33. Qd6
Rfe8 34. Bf3 Re5 35. Rf2 Qg5 36. Bxg4 Rxe2 37. Rxe2 Qxg4+ (37... Qxc1+ 38. Kg2)
38. Rg2 Qe4 39. Qd2 1-0

[Event "Cambridge Invitation C"]
[Site "Cambridge"]
[Date "1971.10.26"]
[Round "1"]
[White "Hartston, Jana"]
[Black "Blackstock, Leslie Steven F"]
[Result "1-0"]
[ECO "E18"]
[PlyCount "169"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Nxe4
Bxe4 9. Nh4 Bxg2 10. Nxg2 c5 11. d5 Bf6 12. Rb1 Re8 13. e3 exd5 14. Qxd5 Nc6
15. b3 Qe7 16. Rd1 Rad8 17. Bb2 Nb4 18. Qf5 Bxb2 19. Rxb2 d5 20. cxd5 Qe5 21.
Qxe5 Rxe5 22. d6 Re6 23. Rbd2 Nc6 24. Nf4 Re4 25. Nd5 Kf8 26. Nc3 Re6 27. Kg2
Rd7 28. h4 Nd8 29. Nb5 f5 30. Rd5 g6 31. Kf3 Nf7 32. Kf4 Rf6 33. a4 Ke8 34. a5
bxa5 35. Rxc5 Nxd6 36. Nxd6+ Rfxd6 37. Rxd6 Rxd6 38. Rxa5 Rd7 39. Kg5 Kf7 40.
Ra6 (40. h5) 40... Kg7 41. g4 (41. h5) 41... fxg4 42. Kxg4 Rb7 43. e4 h5+ 44.
Kg5 Rb5+ 45. Kf4 Rxb3 46. Rxa7+ Kh6 47. f3 Rb1 48. Rf7 Rh1 49. Kg3 Rg1+ 50. Kh2
Re1 51. Kg2 Re2+ 52. Kg3 Re1 53. Re7 Rg1+ 54. Kh2 Re1 55. Kg2 Re2+ 56. Kg3 Re1
57. e5 Rg1+ 58. Kh2 Ra1 59. Rd7 Re1 60. f4 Re4 61. Kg3 Re3+ 62. Kg2 Ra3 63. Rf7
Ra2+ 64. Kf3 Ra3+ 65. Ke4 Ra4+ 66. Kd5 Ra5+ 67. Ke6 Ra6+ 68. Kd7 Ra7+ 69. Ke6
Ra6+ 70. Kd5 Ra5+ 71. Kc6 Ra6+ 72. Kc5 Ra5+ 73. Kb6 Ra1 74. e6 Rb1+ 75. Kc6
Rc1+ 76. Kd7 Rd1+ 77. Ke8 Ra1 78. e7 Ra8+ 79. Kd7 Ra7+ 80. Kc6 Ra6+ 81. Kb7 Re6
82. Kc7 Re1 83. Kd7 Rd1+ 84. Ke8 Ra1 85. Rf8 1-0

[Event "Cambridge Invitation C"]
[Site "Cambridge"]
[Date "1971.10.26"]
[Round "1"]
[White "Patterson, Nicholas James"]
[Black "Stean, Michael Frank"]
[Result "0-1"]
[ECO "B93"]
[WhiteElo "2340"]
[PlyCount "60"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 Qc7 7. Bd3 g6 8. Nf3
Bg7 9. O-O Nbd7 10. Qe1 b5 11. Kh1 Bb7 12. Bd2 e5 13. fxe5 dxe5 14. a4 b4 15.
Na2 a5 16. c3 b3 17. Nc1 Nc5 18. Bb5+ Nfd7 19. Ng5 O-O 20. Qh4 h6 21. Nxf7 Rxf7
22. Rxf7 Kxf7 23. Bc4+ Ne6 24. Bxe6+ Kxe6 25. Nxb3 Nf6 26. Be3 Nxe4 27. Rd1 Kf7
28. Bb6 Qxb6 29. Rd7+ Kg8 30. Nd4 exd4 0-1

[Event "Cambridge Invitation C"]
[Site "Cambridge"]
[Date "1971.10.27"]
[Round "2"]
[White "Hartston, Jana"]
[Black "Patterson, Nicholas James"]
[Result "0-1"]
[ECO "B33"]
[BlackElo "2340"]
[Annotator "Patterson"]
[PlyCount "60"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 h6 7. Nd6+ (7. Nd5
Nxd5 8. exd5 a6 9. dxc6 axb5 10. cxd7+ Bxd7 11. Bd3 Bc6 12. O-O Qd5 13. Qg4 h5)
7... Bxd6 8. Qxd6 Qe7 9. Qd1 O-O 10. Bc4 Qb4 11. Bd3 d5 12. a3 Qc5 (12... Qa5
13. Bd2) 13. Nxd5 Nxd5 14. exd5 e4 15. Bxe4 Re8 16. O-O Rxe4 17. dxc6 Qxc6 (
17... Bg4 18. cxb7) 18. Qd8+ (18. Be3) 18... Re8 19. Qd3 Be6 20. Rd1 Bd5 21.
Be3 Bxg2 22. Qd6 Qxc2 23. Kxg2 (23. Rd2) 23... Rxe3 24. Qd4 Re2 25. Rac1 Qg6+ (
25... Qxb2 26. Qxb2 Rxb2 27. Rd7) 26. Kh1 Rae8 27. b4 Qf5 28. Kg1 R8e4 29. Qxa7
Qg4+ 30. Kh1 Qf3+ (30... Qf3+ 31. Kg1 Rg4+ 32. Kf1 Re8) 0-1

[Event "Cambridge Invitation C"]
[Site "Cambridge"]
[Date "1971.10.28"]
[Round "3"]
[White "Patterson, Nicholas James"]
[Black "Blackstock, Leslie Steven F"]
[Result "0-1"]
[ECO "B76"]
[WhiteElo "2340"]
[PlyCount "79"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. e4 c5 2. Ne2 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 Bd7 7. Bb3 g6 8. f3
Bg7 9. Be3 O-O 10. h4 Qa5 11. h5 Nxh5 12. g4 Nf6 13. Qd2 Rac8 14. O-O-O Ne5 15.
Bh6 Bxh6 16. Rxh6 Rxc3 17. bxc3 Bxg4 18. Rxh7 Kxh7 19. fxg4 Nexg4 20. Rh1+ Kg8
21. Nf5 Nxe4 22. Nh6+ Nxh6 23. Qxh6 Qg5+ 24. Qxg5 Nxg5 25. Rg1 Ne4 26. Rxg6+
Kh7 27. Rg1 Nxc3 28. Kd2 Ne4+ 29. Ke3 f5 30. Bd5 Nc5 31. Rh1+ Kg7 32. Rg1+ Kf6
33. Rh1 Ke5 34. Bc4 Rf6 35. Rh7 e6 36. Kf3 Rg6 37. c3 Rg4 38. Bb3 Rg1 39. Kf2
Rc1 40. Rh3 0-1

[Event "Cambridge Invitation C"]
[Site "Cambridge"]
[Date "1971.10.28"]
[Round "3"]
[White "Stean, Michael Frank"]
[Black "Hartston, Jana"]
[Result "1-0"]
[ECO "B14"]
[PlyCount "49"]
[EventDate "1971.10.26"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "ENG"]
[SourceTitle "BritBase"]
[Source "John Saunders"]
[SourceDate "2023.12.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.12.16"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 g6 6. Qb3 Bg7 7. cxd5 O-O 8.
Be2 Nbd7 9. Bf3 Nb6 10. Nge2 a5 11. O-O Bf5 12. Nf4 Rc8 13. Re1 Re8 14. h3 h5
15. Be3 Rc4 16. Qd1 Qd6 17. Rc1 Rcc8 18. Qe2 Kf8 19. g4 hxg4 20. hxg4 Bd7 21.
g5 Nh7 22. Nd3 Nc4 23. Bf4 Qb6 24. Nc5 Rxc5 25. dxc5 1-0

