[Event "London-ch U21"]
[Site "London"]
[Date "1973.12.??"]
[Round "?"]
[White "Sommerville, Johann P"]
[Black "Nicholson, John G"]
[Result "1-0"]
[ECO "B08"]
[PlyCount "87"]
[EventDate "1973.12.??"]
[EventType "swiss"]
[EventRounds "7"]
[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. Nf3 Nf6 5. Bc4 Nc6 6. d5 Nb8 7. h3 0-0 8. 0-0 c6 9. Bb3 e6 10. dxe6 Bxe6 11. Bxe6 fxe6 12. e5 dxe5 13. Qxd8 Rxd8 14. Bg5 Nbd7 15. Rfe1 h6 16. Bxf6 Bxf6 17. Ne4 Bg7 18. Re2 Nf6 19. Nc5 Rd5 20. Nxe6 e4 21. Nd2 Re5 22. Nxg7 Kxg7 23. Rae1 Rae8 24. f3 e3 25. Nc4 Rc5 26. Nxe3 Kf7 27. Kf2 h5 28. g3 Nd5 29. Nxd5 Rxe2+ 30. Rxe2 Rxd5 31. Ke1 Rf5 32. Re3 g5 33. Ke2 b6 34. Rc3 Re5+ 35. Kf2 c5 36. Rd3 Kf6 37. Rd7 c4 38. Rxa7 Rd5 39. Ke3 Rd1 40. Ra6 Rh1 41. Rxb6+ Kg7 42. Rc6 Rxh3 43. Rxc4 g4 44. Kf4 1-0

[Event "Islington op"]
[Site "Islington"]
[Date "1972.12.17"]
[Round "6"]
[White "Sommerville, Johann P"]
[Black "Wheeler, George W"]
[Result "0-1"]
[ECO "B31"]
[PlyCount "54"]
[EventDate "1972.12.15"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "ENG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. 0-0 Bg7 5. c3 a6 6. Bxc6 bxc6 7. e5 d5 8. exd6 exd6 9. Re1+ Ne7 10. d3 0-0 11. Bg5 f6 12. Qb3+ c4 13. Qxc4+ d5 14. Qc5 fxg5 15. Qxe7 Qb6 16. Qxg5 Qxb2 17. Nbd2 Qxc3 18. Rac1 Qf6 19. Qxf6 Rxf6 20. Re8+ Bf8 21. Rce1 c5 22. Nb3 Rc6 23. R1e7 c4 24. dxc4 dxc4 25. Nbd4 Rb6 26. h3 Rb7 27. Rxc8 Rb1+ 0-1

[Event "Islington op"]
[Site "Islington"]
[Date "1972.12.16"]
[Round "2"]
[White "Dilworth, Vernon"]
[Black "Sommerville, Johann P"]
[Result "0-1"]
[ECO "A83"]
[PlyCount "100"]
[EventDate "1972.12.15"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "ENG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 Nc6 5. d5 Ne5 6. Qd4 Nf7 7. Bh4 g5 8. Bg3 Bg7 9. Nxe4 c6 10. d6 0-0 11. Bc4 Nxe4 12. Qxe4 exd6 13. Qf5 Bxb2 14. Rb1 Qe7+ 15. Kf1 Qf6 16. Qxf6 Bxf6 17. Bxd6 Re8 18. h4 gxh4 19. Nf3 Re4 20. Bb3 b6 21. Re1 Ba6+ 22. Kg1 Rxe1+ 23. Nxe1 Kg7 24. Bf4 Re8 25. Nf3 d5 26. Rh3 Bc8 27. Rh1 Bg4 28. Kh2 Re2 29. Rf1 Bxf3 30. gxf3 Bd4 31. Kg2 b5 32. a4 a6 33. Bc7 Nh6 34. f4 Ng4 35. Kf3 Rxf2+ 36. Rxf2 Nxf2 37. c3 Bc5 38. f5 Ne4 39. Be5+ Kf7 40. Kg4 Bd6 41. Bxd6 Nxd6 42. axb5 axb5 43. Kxh4 Kf6 44. Kh5 Nxf5 45. Bc2 Ng3+ 46. Kh6 Ne4 47. c4 bxc4 48. Ba4 c3 49. Kxh7 d4 50. Bxc6 c2 0-1

[Event "Islington op"]
[Site "Islington"]
[Date "1972.12.16"]
[Round "4"]
[White "Richardson, Keith Bevin"]
[Black "Sommerville, Johann P"]
[Result "1-0"]
[ECO "B08"]
[PlyCount "39"]
[EventDate "1972.12.15"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "ENG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Nf3 Nf6 5. Be2 0-0 6. Bf4 b6 7. 0-0 c5 8. d5 Ba6 9. Re1 Qc8 10. Bxa6 Nxa6 11. Qd2 Ng4 12. h3 Ne5 13. Nxe5 dxe5 14. Bh6 Nc7 15. Bxg7 Kxg7 16. f4 exf4 17. Qxf4 Qd7 18. Rad1 Rad8 19. e5 e6 20. Qf6+ 1-0

[Event "Glorney Cup"]
[Site "Sidcup"]
[Date "1972.08.12"]
[Round "5.4"]
[White "Bentley, David C"]
[Black "Sommerville, Johann P"]
[Result "0-1"]
[ECO "C33"]
[PlyCount "46"]
[EventDate "1972.08.08"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "ENG"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]
[WhiteTeam "Scotland"]
[BlackTeam "England"]
[WhiteTeamCountry "SCO"]
[BlackTeamCountry "ENG"]

1. e4 e5 2. f4 exf4 3. Bc4 Nf6 4. Qe2 d5 5. exd5+ Be7 6. Nf3 0-0 7. 0-0 Re8 8. d4 Bd6 9. Qd3 Bg4 10. Nc3 Nbd7 11. Nb5 Ne4 12. Ne5 Nec5 13. Qa3 Ne4 14. Qd3 Bxe5 15. Qxe4 Bd6 16. Qd3 Be2 17. Qb3 Bxf1 18. Bxf1 Re1 19. Nxd6 cxd6 20. Kf2 Qh4+ 21. g3 Qxh2+ 22. Kxe1 Re8+ 23. Kd1 Qf2 0-1

[Event "Glorney Cup"]
[Site "Sidcup"]
[Date "1972.08.10"]
[Round "3.4"]
[White "Doucet, Christian"]
[Black "Sommerville, Johann P"]
[Result "1/2-1/2"]
[ECO "C68"]
[PlyCount "50"]
[EventDate "1972.08.08"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "ENG"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]
[WhiteTeam "France"]
[BlackTeam "England"]
[WhiteTeamCountry "FRA"]
[BlackTeamCountry "ENG"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4 6. Qxd4 Qxd4 7. Nxd4 Bd7 8. Be3 Nf6 9. Nd2 0-0-0 10. f3 Rg8 11. 0-0-0 c5 12. Ne2 Be7 13. Bf2 Bb5 14. Nc3 Bc6 15. Nc4 b5 16. Ne5 Kb7 17. Nxf7 Rdf8 18. Ne5 Nxe4 19. Nxe4 Bxe4 20. Nd7 Rf5 21. Rhe1 Re8 22. Rxe4 Bg5+ 23. f4 Rxe4 24. fxg5 Kc6 25. Nxc5 Re2 1/2-1/2

[Event "Glorney Cup"]
[Site "Sidcup"]
[Date "1972.08.09"]
[Round "2.4"]
[White "Sommerville, Johann P"]
[Black "Weide, Jan"]
[Result "1-0"]
[ECO "B42"]
[PlyCount "47"]
[EventDate "1972.08.08"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "ENG"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]
[WhiteTeam "England"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "ENG"]
[BlackTeamCountry "NED"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Be3 a6 6. Bd3 Qc7 7. 0-0 b5 8. a4 b4 9. Nd2 Bb7 10. N4b3 Nf6 11. a5 d5 12. Bb6 Qb8 13. f4 dxe4 14. Nxe4 Nxe4 15. Bxe4 Nxa5 16. Bxb7 Nxb7 17. Qf3 Qc8 18. f5 Bc5+ 19. Nxc5 Nxc5 20. fxe6 Rf8 21. exf7+ Ke7 22. Rae1+ Ne6 23. Rxe6+ Qxe6 24. Qb7+ 1-0

[Event "Glorney Cup"]
[Site "Sidcup"]
[Date "1972.08.08"]
[Round "1.4"]
[White "Franklin, Chris"]
[Black "Sommerville, Johann P"]
[Result "0-1"]
[ECO "A89"]
[PlyCount "64"]
[EventDate "1972.08.08"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "ENG"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]
[WhiteTeam "Wales"]
[BlackTeam "England"]
[WhiteTeamCountry "WLS"]
[BlackTeamCountry "ENG"]

1. d4 f5 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. c4 0-0 6. 0-0 d6 7. Nc3 Nc6 8. e3 e5 9. d5 Ne7 10. Qd2 h6 11. b4 g5 12. h4 e4 13. Nh2 gxh4 14. gxh4 Ng6 15. f3 Nxh4 16. Bb2 Qe8 17. fxe4 fxe4 18. Nxe4 Nxe4 19. Rxf8+ Kxf8 20. Bxg7+ Kxg7 21. Qd4+ Nf6 22. Rf1 Nf5 23. Qb2 Qxe3+ 24. Rf2 Qe5 25. Qc2 Ne3 26. Qc1 Bg4 27. Nxg4 Nfxg4 28. Bf3 Qg3+ 29. Rg2 Qxf3 30. Qb2+ Qf6 31. Qxf6+ Kxf6 32. Rg3 Kg5 0-1

[Event "British CF-58 Championship"]
[Site "Blackpool/ Lancashire"]
[Date "1971.08.20"]
[Round "11"]
[White "Parr, Frank"]
[Black "Sommerville, Johann P"]
[Result "1/2-1/2"]
[ECO "A36"]
[PlyCount "127"]
[EventDate "1971.08.09"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GBR"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. c4 Nc6 5. Ne2 d6 6. 0-0 e6 7. Nbc3 Nge7 8. d3 0-0 9. Be3 Nd4 10. Rb1 Nec6 11. Qd2 e5 12. f4 Bg4 13. Nc1 Qd7 14. Nd5 Ne7 15. Bxd4 exd4 16. Nxe7+ Qxe7 17. b4 Bc8 18. Ne2 b6 19. bxc5 dxc5 20. h3 Bb7 21. g4 Qh4 22. Qe1 Qxe1 23. Rbxe1 f5 24. gxf5 gxf5 25. e5 Bxg2 26. Kxg2 Kf7 27. Rb1 Rg8 28. Kf3 Bf8 29. Ng3 Ke6 30. Nh5 Be7 31. Rg1 Kf7 32. Rbe1 Bh4 33. Ref1 Rg6 34. Ng3 Ke6 35. Rg2 Rag8 36. Rfg1 R8g7 37. Nh5 Rg8 38. a4 Ke7 39. Ng3 Ke6 40. Ne2 Kf7 41. Rxg6 hxg6 42. Rg2 Ke6 43. Ng1 g5 44. Ke2 g4 45. Kf1 Rg6 46. Nf3 Be7 47. Nh2 Bf8 48. hxg4 fxg4 49. Kf2 Kf5 50. Kg3 Bh6 51. Rf2 Bf8 52. Nf1 Rh6 53. Kg2 Rh3 54. Ng3+ Ke6 55. Re2 Be7 56. f5+ Kf7 57. Re4 Rh4 58. f6 Bd8 59. Rf4 Rh8 60. Rxg4 Ke6 61. Rg7 Kxe5 62. Ne4 Bxf6 63. Nxf6 Kxf6 64. Rxa7 1/2-1/2

[Event "British CF-58 Championship"]
[Site "Blackpool/ Lancashire"]
[Date "1971.08.19"]
[Round "10"]
[White "Sommerville, Johann P"]
[Black "Haygarth, Michael J"]
[Result "1/2-1/2"]
[ECO "C02"]
[PlyCount "32"]
[EventDate "1971.08.09"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GBR"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 cxd4 5. Bd3 Ne7 6. Bf4 Qb6 7. Nbd2 Nd7 8. Nb3 Nc6 9. 0-0 Nc5 10. Nfxd4 Nxd3 11. Qxd3 Nxd4 12. Qxd4 Qxd4 13. Nxd4 Bd7 14. c3 f6 15. Rfe1 Kf7 16. Re2 f5 1/2-1/2

[Event "British CF-58 Championship"]
[Site "Blackpool/ Lancashire"]
[Date "1971.08.18"]
[Round "9"]
[White "Wade, Robert Graham"]
[Black "Sommerville, Johann P"]
[Result "1-0"]
[ECO "A04"]
[PlyCount "67"]
[EventDate "1971.08.09"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GBR"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. c3 cxd4 4. cxd4 g6 5. Nc3 Bg7 6. g3 0-0 7. Bg2 d6 8. 0-0 Nc6 9. h3 Bf5 10. Nh4 Bd7 11. e4 Qc8 12. Kh2 Nxd4 13. Be3 Nc6 14. f4 Qd8 15. g4 Qa5 16. a3 Rfc8 17. Qd2 Qd8 18. Rad1 Na5 19. Qe2 Be6 20. Nd5 Bxd5 21. exd5 a6 22. Bd4 b5 23. Rfe1 Rc4 24. Bc3 Ra7 25. Nf3 Qb6 26. Nd4 Nh5 27. Bxa5 Qxa5 28. Nc6 Rxc6 29. dxc6 Nxf4 30. Qe3 Nxg2 31. Qxa7 Nxe1 32. Qb8+ Bf8 33. c7 Nf3+ 34. Kg3 1-0

[Event "British CF-58 Championship"]
[Site "Blackpool/ Lancashire"]
[Date "1971.08.17"]
[Round "8"]
[White "Sommerville, Johann P"]
[Black "Ludgate, Alan Templeton"]
[Result "1-0"]
[ECO "C44"]
[PlyCount "63"]
[EventDate "1971.08.09"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GBR"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. 0-0 dxc3 7. Nxc3 d6 8. Bg5 h6 9. Bh4 Bg4 10. Nd5 g5 11. Bg3 0-0 12. Qd3 Bxf3 13. Qxf3 Nxd5 14. Bxd5 Nd4 15. Qh5 Qf6 16. Kh1 c6 17. Bc4 b5 18. Bd3 Ne6 19. Rae1 Ng7 20. Qe2 Rfe8 21. e5 dxe5 22. Bxe5 Qe6 23. Qc2 f6 24. Bc3 Qd6 25. Rd1 Qf8 26. Bh7+ Kh8 27. Qg6 Nh5 28. Qxh5 Kxh7 29. Qf3 Be7 30. Rd7 Kg6 31. Qe4+ Kg7 32. Re1 1-0

[Event "British CF-58 Championship"]
[Site "Blackpool/ Lancashire"]
[Date "1971.08.16"]
[Round "7"]
[White "Lee, Peter N"]
[Black "Sommerville, Johann P"]
[Result "1/2-1/2"]
[ECO "C72"]
[PlyCount "116"]
[EventDate "1971.08.09"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GBR"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. 0-0 Bg4 6. h3 h5 7. d3 Qf6 8. hxg4 hxg4 9. Ng5 Qh6 10. f4 b5 11. Qxg4 Qh2+ 12. Kf2 Nf6 13. Qg3 Qxg3+ 14. Kxg3 bxa4 15. c3 Rb8 16. f5 Be7 17. Nh3 Nd7 18. Kf3 Nc5 19. Ke2 Bf6 20. Nd2 Na5 21. Nf3 Bh4 22. Rb1 Nd7 23. Kd2 c5 24. Kc2 Be7 25. b3 axb3+ 26. axb3 Nc6 27. Ra1 a5 28. Be3 0-0 29. g4 Rb5 30. g5 Rfb8 31. Nd2 Nb6 32. Nf2 d5 33. Nh3 d4 34. Bg1 dxc3 35. Kxc3 Nd4 36. Bxd4 cxd4+ 37. Kc2 Bb4 38. Nc4 Bc3 39. Rab1 Nxc4 40. dxc4 Rb4 41. Nf2 a4 42. bxa4 Rb2+ 43. Rxb2 Rxb2+ 44. Kc1 Ra2 45. Nd1 Rxa4 46. Kc2 Rxc4 47. Kd3 Rc6 48. Rg1 Ba5 49. g6 fxg6 50. Rxg6 Rxg6 51. fxg6 Be1 52. Kc4 Bh4 53. Kd5 Bf6 54. Nf2 Kf8 55. Kc4 Ke7 56. Ng4 Ke6 57. Kd3 Bg5 58. Kc4 Kd6 1/2-1/2

[Event "British CF-58 Championship"]
[Site "Blackpool/ Lancashire"]
[Date "1971.08.14"]
[Round "6"]
[White "Sommerville, Johann P"]
[Black "Blackstock, Leslie Steven F"]
[Result "1/2-1/2"]
[ECO "B53"]
[PlyCount "39"]
[EventDate "1971.08.09"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GBR"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Bd7 5. c4 Nc6 6. Qd2 Nf6 7. Nc3 g6 8. b3 Bg7 9. Bb2 0-0 10. h3 Qa5 11. Bd3 a6 12. 0-0 Rfc8 13. Rfd1 Rab8 14. Nd5 Qxd2 15. Rxd2 Nxd5 16. Bxg7 Kxg7 17. exd5 Nb4 18. Re1 Kf8 19. Bb1 a5 20. Rde2 1/2-1/2

[Event "British CF-58 Championship"]
[Site "Blackpool/ Lancashire"]
[Date "1971.08.13"]
[Round "5"]
[White "Linton, William A"]
[Black "Sommerville, Johann P"]
[Result "0-1"]
[ECO "C53"]
[PlyCount "72"]
[EventDate "1971.08.09"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GBR"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Bb6 5. d4 Qe7 6. 0-0 d6 7. a4 a6 8. h3 Nf6 9. Re1 0-0 10. b4 Kh8 11. Ba3 Ng8 12. Qd3 f6 13. Nbd2 a5 14. b5 Nd8 15. Bd5 Ne6 16. Nc4 Nf4 17. Qd2 Ba7 18. Bxg8 Kxg8 19. b6 Qf7 20. Qa2 Be6 21. d5 Bxh3 22. Ne3 Bxb6 23. gxh3 Nxh3+ 24. Kh1 Qh5 25. Nh2 Qh4 26. f3 Nf2+ 27. Kg2 Nd3 28. Qd2 Nxe1+ 29. Rxe1 Qg5+ 30. Kh1 f5 31. Bc1 fxe4 32. fxe4 Bxe3 33. Qxe3 Qh4 34. Kg2 Rf6 35. Rf1 Raf8 36. Rf3 Rg6+ 0-1

[Event "British CF-58 Championship"]
[Site "Blackpool/ Lancashire"]
[Date "1971.08.12"]
[Round "4"]
[White "Sommerville, Johann P"]
[Black "Burnett, Leon P"]
[Result "1/2-1/2"]
[ECO "B08"]
[PlyCount "83"]
[EventDate "1971.08.09"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GBR"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c6 2. d4 g6 3. Nf3 Bg7 4. Nc3 d6 5. Bc4 Nf6 6. Qe2 d5 7. e5 Nfd7 8. Bd3 Nf8 9. h3 Ne6 10. Be3 Nd7 11. 0-0-0 b5 12. Ng5 Nb6 13. Nxe6 Bxe6 14. f4 b4 15. Nb1 Qd7 16. Nd2 Bf5 17. g4 Bxd3 18. Qxd3 e6 19. Rdf1 a5 20. f5 Na4 21. Nb3 Qa7 22. fxe6 fxe6 23. Bg5 Qa6 24. Qxa6 Rxa6 25. Bf6 0-0 26. g5 Rc8 27. Bxg7 Kxg7 28. Nc5 Nxc5 29. dxc5 Rf8 30. Rf6 Rxf6 31. gxf6+ Kf7 32. Kd2 Ra8 33. Kd3 Rb8 34. h4 h6 35. Rg1 Rb7 36. b3 Rb5 37. Kd4 Rb8 38. Rg2 Rb5 39. Rg3 Rb8 40. Rg1 Rb5 41. Rh1 Rb8 42. Rg1 1/2-1/2

[Event "British CF-58 Championship"]
[Site "Blackpool/ Lancashire"]
[Date "1971.08.11"]
[Round "3"]
[White "Kalton, Nick J"]
[Black "Sommerville, Johann P"]
[Result "1/2-1/2"]
[ECO "C51"]
[PlyCount "30"]
[EventDate "1971.08.09"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GBR"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7 6. d4 Na5 7. Bd3 exd4 8. cxd4 d5 9. e5 Bb4+ 10. Nbd2 Ne7 11. 0-0 Bf5 12. Nb3 Nxb3 13. Qxb3 Bxd3 14. Qxd3 Qd7 15. Rb1 Qa4 1/2-1/2

[Event "British CF-58 Championship"]
[Site "Blackpool/ Lancashire"]
[Date "1971.08.10"]
[Round "2"]
[White "Sommerville, Johann P"]
[Black "Wise, Derik M"]
[Result "1/2-1/2"]
[ECO "C02"]
[PlyCount "36"]
[EventDate "1971.08.09"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GBR"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 cxd4 5. Bd3 Nc6 6. 0-0 f6 7. Bb5 Bd7 8. Bxc6 bxc6 9. Qxd4 Qb6 10. Qf4 f5 11. c4 Ne7 12. cxd5 cxd5 13. Be3 Ng6 14. Qg3 Qb4 15. Bd4 Be7 16. a3 Qb7 17. h4 0-0 18. Nc3 a5 1/2-1/2

[Event "British CF-58 Championship"]
[Site "Blackpool/ Lancashire"]
[Date "1971.08.09"]
[Round "1"]
[White "Wright, Daniel"]
[Black "Sommerville, Johann P"]
[Result "1-0"]
[ECO "A10"]
[PlyCount "55"]
[EventDate "1971.08.09"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GBR"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. Nf3 g6 2. c4 Bg7 3. Nc3 f5 4. e4 fxe4 5. Nxe4 Nf6 6. Nxf6+ exf6 7. d4 0-0 8. Be2 d5 9. 0-0 Be6 10. Qb3 b6 11. Re1 Nc6 12. Bd2 Qd6 13. Rac1 Ne7 14. c5 Qd7 15. Bb4 Rf7 16. c6 Qd8 17. Ba6 Bc8 18. Bxe7 Rxe7 19. Rxe7 Qxe7 20. Bxc8 Rxc8 21. Qxd5+ Kf8 22. Re1 Qd6 23. Qxd6+ cxd6 24. d5 Kf7 25. Nd4 Bf8 26. Re3 a6 27. Ra3 Ra8 28. c7 1-0

[Event "Islington Junior A"]
[Site "Islington"]
[Date "1971.06.??"]
[Round "?"]
[White "Hecht, Hans Joachim"]
[Black "Sommerville, Johann P"]
[Result "1-0"]
[ECO "C69"]
[PlyCount "111"]
[EventDate "1971.12.13"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 f6 6. d4 Bg4 7. dxe5 Qxd1 8. Rxd1 Bxf3 9. gxf3 fxe5 10. Be3 Bd6 11. Nd2 Ne7 12. Nc4 0-0-0 13. Rd3 Ng6 14. Kf1 Be7 15. Rxd8+ Rxd8 16. Ke2 b6 17. Rg1 Kd7 18. Rg4 Ke6 19. b3 Rf8 20. Nb2 Rf7 21. Nd3 Bd6 22. h4 Nf4+ 23. Bxf4 exf4 24. h5 c5 25. Kf1 c6 26. Kg2 Be5 27. Kh3 Bb8 28. Rg5 Bc7 29. Kg4 Bb8 30. e5 h6 31. Rg6+ Kd5 32. Nxf4+ Kxe5 33. Re6+ Kd4 34. Ne2+ Kd5 35. Re8 Be5 36. f4 Bf6 37. c4+ Kd6 38. Ng3 Kc7 39. Ne4 Bd8 40. Re6 Kd7 41. Rd6+ Kc7 42. Rg6 Kd7 43. f5 Re7 44. f6 Rxe4+ 45. Kf5 Re8 46. fxg7 Rg8 47. Rg1 Bh4 48. Rd1+ Ke7 49. Kg6 Bxf2 50. Kh7 Rc8 51. g8Q Rxg8 52. Kxg8 Bh4 53. Kg7 Bg5 54. Rg1 Bf6+ 55. Kxh6 Kf7 56. Rf1 1-0

[Event "Islington Junior A"]
[Site "Islington"]
[Date "1971.06.??"]
[Round "?"]
[White "Law, Andrew P"]
[Black "Sommerville, Johann P"]
[Result "1-0"]
[ECO "C68"]
[PlyCount "80"]
[EventDate "1971.12.13"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 Qd6 6. d4 exd4 7. Nxd4 c5 8. Ne2 Bd7 9. Nbc3 Qxd1 10. Rxd1 0-0-0 11. Bf4 Ne7 12. Bg3 h5 13. h3 h4 14. Bh2 Rh6 15. Nf4 Nc6 16. Nfd5 Bd6 17. Bxd6 cxd6 18. Nb6+ Kb8 19. Nxd7+ Rxd7 20. Nd5 Re6 21. f3 Nd4 22. Rd2 g6 23. c3 Nc6 24. Rad1 Ne5 25. Nb6 Rd8 26. b3 Kc7 27. Nd5+ Kc6 28. Kf2 g5 29. Ne3 Ng6 30. b4 Ne5 31. bxc5 Kxc5 32. a4 b6 33. Rb1 Rb8 34. Ke2 Kc6 35. Rd4 Kc5 36. Nd5 Rb7 37. Nb4 a5 38. Rd5+ Kc4 39. Kd2 f6 40. Nc2 Nxf3+ 1-0

[Event "Islington Junior A"]
[Site "Islington"]
[Date "1971.06.??"]
[Round "?"]
[White "Sommerville, Johann P"]
[Black "Bennett, Gerald H"]
[Result "1-0"]
[ECO "B53"]
[PlyCount "59"]
[EventDate "1971.12.13"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Bd7 5. c4 Nc6 6. Qd2 Nf6 7. Nc3 g6 8. h3 Bg7 9. Bd3 0-0 10. b3 a6 11. Bb2 Qa5 12. 0-0 Rfc8 13. Rfd1 Nb4 14. Nd5 Nfxd5 15. Bxg7 Kxg7 16. exd5 Qa3 17. Re1 Re8 18. Re2 a5 19. Rae1 e5 20. dxe6 fxe6 21. Be4 d5 22. cxd5 Bb5 23. Qd4+ Kg8 24. Rd2 Rad8 25. Qc5 Ba6 26. d6 Rf8 27. Ng5 Rc8 28. Qe5 Nc6 29. Bxc6 bxc6 30. Nxe6 1-0

[Event "British CF-56 U16"]
[Site "Rhyl/ Denbighshire"]
[Date "1969.08.21"]
[Round "10"]
[White "Sommerville, Johann P"]
[Black "Saunders, John C"]
[Result "1-0"]
[ECO "C34"]
[PlyCount "55"]
[EventDate "1969.08.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "ENG"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e5 2. f4 exf4 3. Nf3 Be7 4. Bc4 d6 5. 0-0 g5 6. d4 h6 7. g3 g4 8. Nh4 Bxh4 9. gxh4 f3 10. Qe1 Ne7 11. Nc3 c6 12. Bf4 b5 13. Bxb5 cxb5 14. Nxb5 Ba6 15. Nxd6+ Kf8 16. Qd2 Kg8 17. Rf2 Bc8 18. Kh1 Ng6 19. h5 Nxf4 20. Qxf4 Rh7 21. Rg1 Kf8 22. Nxc8 Qxc8 23. Rxg4 Rg7 24. Rxg7 Kxg7 25. Rxf3 Qe6 26. d5 Qe7 27. Rg3+ Kh7 28. Qf5+ 1-0

[Event "British CF-56 U16"]
[Site "Rhyl/ Denbighshire"]
[Date "1969.08.18"]
[Round "7"]
[White "Stean, Michael F"]
[Black "Sommerville, Johann P"]
[Result "1-0"]
[ECO "B36"]
[PlyCount "45"]
[EventDate "1969.08.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "ENG"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Nf6 6. Nc3 Nxd4 7. Qxd4 d6 8. Be2 Bg7 9. 0-0 0-0 10. Qd3 Nd7 11. Bd2 Nc5 12. Qe3 Bd7 13. Rad1 Rc8 14. Kh1 a6 15. f4 Bc6 16. f5 b5 17. cxb5 axb5 18. b4 Bxc3 19. Bxc3 Nxe4 20. Bd4 Qe8 21. Bd3 d5 22. Bxe4 dxe4 23. f6 1-0

[Event "British CF-56 U16"]
[Site "Rhyl/ Denbighshire"]
[Date "1969.08.13"]
[Round "3"]
[White "Sommerville, Johann P"]
[Black "Delnon, Robert J"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "57"]
[EventDate "1969.08.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "ENG"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 Qb6 5. Bd3 Bd7 6. 0-0 Nc6 7. dxc5 Bxc5 8. Nbd2 Nd4 9. c3 Nxf3+ 10. Qxf3 Rc8 11. Nb3 Ne7 12. Nxc5 Qxc5 13. Qg3 Ng6 14. Be3 Qa5 15. a4 Qc7 16. Bd4 Bc6 17. h4 Rg8 18. h5 Nf8 19. b4 b6 20. Rfb1 h6 21. b5 Bb7 22. a5 g6 23. axb6 axb6 24. Qe3 Nd7 25. hxg6 fxg6 26. Qh3 Nc5 27. Bxc5 Qxc5 28. Qxe6+ Kf8 29. Qf6+ 1-0

[Event "British CF-56 U16"]
[Site "Rhyl/ Denbighshire"]
[Date "1969.08.12"]
[Round "2"]
[White "Thomas, DA."]
[Black "Sommerville, Johann P"]
[Result "0-1"]
[ECO "E18"]
[PlyCount "56"]
[EventDate "1969.08.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "ENG"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. 0-0 0-0 7. Nc3 d6 8. e3 Nbd7 9. d5 e5 10. e4 a5 11. Re1 Nc5 12. b3 Bc8 13. Bg5 h6 14. Bd2 Nh7 15. Rf1 f5 16. Ne1 f4 17. Qe2 Ng5 18. gxf4 exf4 19. e5 dxe5 20. d6 Bxd6 21. Bxa8 Bh3 22. Bg2 Bxg2 23. Kxg2 f3+ 24. Nxf3 Nxf3 25. Ne4 Qh4 26. Rh1 Nxe4 27. Be3 Qg4+ 28. Kf1 Qh3# 0-1

[Event "British CF-56 U16"]
[Site "Rhyl/ Denbighshire"]
[Date "1969.08.??"]
[Round "?"]
[White "Sommerville, Johann P"]
[Black "Hale, D."]
[Result "1-0"]
[ECO "C02"]
[PlyCount "45"]
[EventDate "1969.08.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "ENG"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 Nc6 5. Bd3 cxd4 6. 0-0 Bc5 7. Nbd2 Bd7 8. Nb3 Bb6 9. Re1 a5 10. a4 Rc8 11. Bf4 Nge7 12. Qe2 Qc7 13. h4 Nb4 14. Nbxd4 Nxd3 15. cxd3 Ng6 16. Bg3 Qd8 17. h5 Ne7 18. Bh4 Rc7 19. h6 g6 20. Bf6 Rg8 21. Qd2 Qc8 22. Qg5 Nc6 23. Nb5 1-0

