[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.22"]
[Round "12"]
[White "Willis, David W"]
[Black "Rohland, Marshall"]
[Result "1/2-1/2"]
[ECO "B22"]
[PlyCount "83"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 e5 5. dxe5 Qxe5+ 6. Be2 Nc6 7. Nf3 Qc7 8. 0-0 Bd6 9. Na3 a6 10. Nc4 Be7 11. g3 Bh3 12. Bf4 Qd8 13. Qxd8+ Rxd8 14. Rfd1 Nf6 15. Rxd8+ Nxd8 16. Nd6+ Bxd6 17. Bxd6 Ne6 18. Rd1 Ne4 19. Ne5 Nxd6 20. Rxd6 0-0 21. Bc4 g6 22. f4 b5 23. Bd5 Kg7 24. Kf2 a5 25. Ke3 h5 26. Rc6 Rb8 27. Ra6 Nc7 28. Rd6 Nxd5+ 29. Rxd5 Be6 30. Rxc5 Bxa2 31. Rc7 Be6 32. Nc6 Ra8 33. Nd4 Bc4 34. h3 a4 35. g4 hxg4 36. hxg4 a3 37. bxa3 Rxa3 38. Ke4 Rxc3 39. Nxb5 Bd3+ 40. Kd4 Rxc7 41. Nxc7 Bc2 42. g5 1/2-1/2

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.21"]
[Round "11"]
[White "Rogan, Marvin"]
[Black "Willis, David W"]
[Result "1-0"]
[ECO "B01"]
[PlyCount "67"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bg4 6. h3 Bh5 7. Bd2 c6 8. Bc4 e6 9. Qe2 Qc7 10. g4 Bg6 11. g5 Nh5 12. d5 cxd5 13. Nxd5 Qc8 14. Ne5 Nc6 15. Nxc6 bxc6 16. Nf4 Nxf4 17. Bxf4 a5 18. Qe5 Rg8 19. 0-0-0 Be7 20. h4 a4 21. h5 Bf5 22. f3 h6 23. Rhg1 Qb7 24. gxh6 Bf6 25. Qxf6 gxf6 26. Rxg8+ Ke7 27. Bd6+ Kd7 28. Rg7 Kc8 29. h7 Bxh7 30. Rxh7 Qb6 31. Rxf7 Qe3+ 32. Kb1 Qxf3 33. Bxe6+ Kd8 34. Rf8# 1-0

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.20"]
[Round "10"]
[White "Willis, David W"]
[Black "Sawyer, Steven"]
[Result "1-0"]
[ECO "C45"]
[PlyCount "84"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 Bb6 6. a4 a5 7. Nc3 Qf6 8. Qe2 Nge7 9. Nd5 Nxd5 10. exd5+ Ne7 11. h4 Qd6 12. Rh3 Qxd5 13. Be3 d6 14. Rg3 Qe5 15. Bxb6 Qxe2+ 16. Bxe2 cxb6 17. Bb5+ Kf8 18. 0-0-0 Nf5 19. Rc3 Be6 20. Nd4 Nxd4 21. Rxd4 d5 22. Rc7 Rb8 23. c4 dxc4 24. Rd6 h5 25. Rxb6 Rh6 26. Bxc4 Bxc4 27. Rxh6 gxh6 28. Rxc4 b6 29. Rc6 Kg7 30. g3 b5 31. Rc5 bxa4 32. Rxa5 Rb4 33. Rxh5 Kg6 34. Ra5 f5 35. Kc2 f4 36. g4 f3 37. Ra6+ Kg7 38. g5 Rxh4 39. Rxh6 Rg4 40. Rf6 Rg2 41. Rxf3 Rxg5 42. Rg3 Rxg3 1-0

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.17"]
[Round "7"]
[White "Willis, David W"]
[Black "Burgar, Wesley"]
[Result "0-1"]
[ECO "C03"]
[PlyCount "43"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 f5 4. exf5 exf5 5. Ngf3 Nf6 6. Be2 Bd6 7. 0-0 0-0 8. c4 c6 9. Qc2 Kh8 10. Re1 Ne4 11. Nf1 Be6 12. c5 Bc7 13. b4 Qf6 14. Bd3 Nd7 15. Bb2 Rae8 16. Ne5 Nxe5 17. dxe5 Bxe5 18. Bxe5 Qxe5 19. f3 Qd4+ 20. Ne3 f4 21. fxe4 fxe3 22. Re2 0-1

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.15"]
[Round "6"]
[White "Matera, Salvatore Joseph"]
[Black "Willis, David W"]
[Result "1-0"]
[ECO "B01"]
[PlyCount "43"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 c6 6. Bc4 Bg4 7. h3 Bh5 8. Qe2 e6 9. Bd2 Qd8 10. g4 Bg6 11. 0-0-0 Nbd7 12. Ne5 Nxe5 13. dxe5 Nd5 14. f4 a6 15. Qf3 Qc8 16. Rhf1 h5 17. f5 hxg4 18. hxg4 exf5 19. Nxd5 fxg4 20. Nf6+ gxf6 21. Qxf6 Rh7 22. e6 1-0

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.13"]
[Round "4"]
[White "Lapiken, Peter Petrovich"]
[Black "Willis, David W"]
[Result "0-1"]
[ECO "A07"]
[PlyCount "74"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. g3 d5 2. Nf3 Nf6 3. Bg2 c6 4. 0-0 Bf5 5. d3 h6 6. Nbd2 e6 7. Re1 Be7 8. c3 0-0 9. b4 a5 10. Qb3 axb4 11. cxb4 Qb6 12. Rb1 Nbd7 13. a3 Bh7 14. e4 Ng4 15. Re2 Nge5 16. Nxe5 Nxe5 17. Bb2 Ng6 18. h4 Rfe8 19. Rbe1 dxe4 20. Nxe4 Rad8 21. h5 Nf8 22. Qc3 f6 23. Re3 Kh8 24. Bh3 Bg8 25. g4 Bf7 26. f4 Nh7 27. g5 Bg8 28. gxh6 gxh6 29. Kf1 Bf7 30. Bxe6 Bxe6 31. Nc5 Bxc5 32. Rxe6 Rxe6 33. Rxe6 Bd4 34. Qe1 Bxb2 35. Re8+ Nf8 36. Qe7 Rxe8 37. Qxe8 Kg8 0-1

[Event "W1 BDG theme qual corr6871"]
[Site "corr"]
[Date "1968.??.??"]
[Round "?"]
[White "Dennis, JW."]
[Black "Willis, David W"]
[Result "0-1"]
[ECO "D00"]
[PlyCount "56"]
[EventDate "1968.??.??"]
[EventType "tourn (corr)"]
[EventRounds "9"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. 0-0 0-0 8. Bg5 Bg4 9. Qd2 Bxf3 10. Rxf3 Nc6 11. Rd1 Na5 12. Be2 b6 13. Bh6 e5 14. Bxg7 Kxg7 15. dxe5 Ng8 16. Qf4 Qe7 17. Nd5 Qc5+ 18. Ne3 Nc6 19. Rd5 Qe7 20. Rg3 Kh8 21. Bf3 Rae8 22. Nc4 f6 23. Rd1 Nxe5 24. Nxe5 fxe5 25. Qa4 Rf4 26. Qxa7 Qc5+ 27. Kh1 Qxc2 28. Rf1 e4 0-1

[Event "W1 BDG theme qual corr6871"]
[Site "corr"]
[Date "1968.??.??"]
[Round "?"]
[White "Smook, Roger"]
[Black "Willis, David W"]
[Result "0-1"]
[ECO "D00"]
[PlyCount "64"]
[EventDate "1968.??.??"]
[EventType "tourn (corr)"]
[EventRounds "9"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bg5 Bg7 7. Qd2 0-0 8. 0-0-0 Nbd7 9. Bh6 Nb6 10. h3 c6 11. Ne5 Be6 12. Ng4 Bc4 13. Bxg7 Kxg7 14. Qh6+ Kg8 15. Nxf6+ exf6 16. h4 f5 17. Bd3 Rc8 18. Ne2 Re8 19. Ng3 Re6 20. Kb1 Qf8 21. Qc1 Rce8 22. h5 Bxd3 23. Rxd3 Qe7 24. Rdd1 Re3 25. Nf1 Re1 26. Nd2 Rxh1 27. Rxh1 Qg5 28. Re1 Rxe1 29. Qxe1 Qxh5 30. Nf3 Nd5 31. c4 Nf6 32. a3 Qg4 0-1

[Event "W1 BDG theme qual corr6871"]
[Site "corr"]
[Date "1968.??.??"]
[Round "?"]
[White "Willis, David W"]
[Black "Dordion"]
[Result "1-0"]
[ECO "D00"]
[PlyCount "59"]
[EventDate "1968.??.??"]
[EventType "tourn (corr)"]
[EventRounds "9"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bg5 Bf5 7. Ne5 Bg7 8. Bc4 0-0 9. Qd2 c6 10. 0-0-0 b5 11. Bb3 a5 12. a4 b4 13. Ne2 Nd5 14. Bh6 Qc7 15. Ng3 Be6 16. h4 Nd7 17. h5 Nxe5 18. Bxg7 Kxg7 19. hxg6 Ng4 20. Nh5+ Kxg6 21. Bxd5 cxd5 22. Nf4+ Kf6 23. Rh6+ Nxh6 24. Nxd5+ Bxd5 25. Qxh6+ Kf5 26. Rf1+ Kg4 27. Qh3+ Kg5 28. Rf5+ Kg6 29. Qg4+ Kh6 30. Rh5# 1-0

[Event "US Open-68"]
[Site "Atlanta"]
[Date "1967.??.??"]
[Round "2"]
[White "Pundy, Joseph"]
[Black "Willis, David W"]
[Result "1-0"]
[ECO "B09"]
[PlyCount "35"]
[EventDate "1967.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 Nf6 5. Nf3 0-0 6. Bd3 Na6 7. e5 dxe5 8. fxe5 Nd5 9. Ne4 Nab4 10. Bc4 Bf5 11. Qe2 Nb6 12. Bb3 Nc6 13. c3 Bxe4 14. Qxe4 Na5 15. Bc2 Qd5 16. Qe2 f5 17. b4 Nac4 18. Bb3 1-0

[Event "US Open-68"]
[Site "Atlanta"]
[Date "1967.??.??"]
[Round "4"]
[White "Wade, Dudley B"]
[Black "Willis, David W"]
[Result "0-1"]
[ECO "A43"]
[PlyCount "56"]
[EventDate "1967.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 g6 2. f4 Bg7 3. Nf3 d6 4. d4 Nf6 5. Nc3 0-0 6. Be2 c5 7. d5 e6 8. dxe6 Bxe6 9. 0-0 Nc6 10. Kh1 Ne8 11. Bd2 Nd4 12. Nxd4 cxd4 13. Nd5 Bxd5 14. exd5 Qb6 15. Rb1 Qc5 16. c4 dxc3 17. bxc3 Qxd5 18. c4 Qc6 19. Qb3 Rc8 20. Qxb7 Bd4 21. f5 Nf6 22. Bd3 Qxb7 23. Rxb7 Ng4 24. Be1 Ne5 25. Be4 Nxc4 26. fxg6 hxg6 27. Bd5 Ne3 28. Bxf7+ Rxf7 0-1

[Event "US Open-68"]
[Site "Atlanta"]
[Date "1967.??.??"]
[Round "8"]
[White "Westbrock, John T"]
[Black "Willis, David W"]
[Result "1-0"]
[ECO "D02"]
[PlyCount "91"]
[EventDate "1967.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. g3 cxd4 5. Nxd4 Nc6 6. Nxc6 bxc6 7. Bg2 d5 8. 0-0 Be7 9. cxd5 exd5 10. Qc2 Bb7 11. Nd2 0-0 12. Nb3 Re8 13. Be3 Nd7 14. Rac1 a5 15. Nd4 c5 16. Nf5 Bf8 17. Qb3 Qc8 18. Bxd5 Bxd5 19. Qxd5 Nf6 20. Qf3 Re5 21. Nh6+ gxh6 22. Qxf6 Bg7 23. Qh4 Qe6 24. Qf4 Qxa2 25. Bxc5 Rxe2 26. Ba3 Rae8 27. Qg4 R2e4 28. Qh5 Bxb2 29. Bxb2 Qxb2 30. Qxa5 Qb3 31. Qf5 R4e6 32. Qg4+ Rg6 33. Qd7 Rge6 34. Rc7 Qf3 35. Rc8 Rxc8 36. Qxc8+ Kg7 37. Qc5 Rc6 38. Qd4+ Rf6 39. Rb1 Kg6 40. h4 Qf5 41. Rb8 Kg7 42. Rb6 Kg6 43. g4 Qf3 44. h5+ Kg5 45. Qe5+ Kh4 46. Qxf6+ 1-0

[Event "US Open-68"]
[Site "Atlanta"]
[Date "1967.??.??"]
[Round "5"]
[White "Willis, David W"]
[Black "Collins, John William"]
[Result "0-1"]
[ECO "D04"]
[PlyCount "74"]
[EventDate "1967.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Nbd2 d5 4. e3 Bg7 5. Bd3 Nbd7 6. 0-0 c5 7. c3 0-0 8. e4 dxe4 9. Nxe4 Nxe4 10. Bxe4 Nf6 11. Bc2 cxd4 12. Qxd4 Qxd4 13. Nxd4 Nd5 14. Be4 Nb6 15. Nb3 f5 16. Bf3 e5 17. g3 e4 18. Be2 Re8 19. Be3 Be6 20. Nc5 Bc4 21. Rfe1 Bxe2 22. Rxe2 Nc4 23. Rd1 b6 24. Nb3 Rad8 25. Rxd8 Rxd8 26. Nd4 Kf7 27. Kg2 Rd7 28. Rc2 Bf8 29. Re2 Bc5 30. Rc2 Kf6 31. h4 Ne5 32. Re2 Kf7 33. Rc2 Bxd4 34. Bxd4 Nf3 35. Kf1 Ke6 36. Ke2 Rxd4 37. cxd4 Nxd4+ 0-1

[Event "US Open-68"]
[Site "Atlanta"]
[Date "1967.??.??"]
[Round "7"]
[White "Willis, David W"]
[Black "Jacobs, John N"]
[Result "1/2-1/2"]
[ECO "A47"]
[PlyCount "98"]
[EventDate "1967.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. e3 g6 4. Nbd2 b6 5. Bd3 Bb7 6. 0-0 Bg7 7. c3 d5 8. Ne5 Nbd7 9. f4 0-0 10. Ndf3 Ne4 11. Nxd7 Qxd7 12. Ne5 Qc7 13. Qe2 f6 14. Nf3 e5 15. fxe5 fxe5 16. dxe5 Bxe5 17. Bxe4 dxe4 18. Nxe5 Rxf1+ 19. Qxf1 Qxe5 20. Bd2 Rd8 21. Qe2 Rd3 22. Rf1 Bd5 23. Qf2 Qe7 24. b3 b5 25. Bc1 c4 26. b4 Be6 27. Qf4 Bf7 28. h4 Rd5 29. Rf2 Rh5 30. g3 Rd5 31. Rd2 Qd7 32. Rd4 Qe6 33. Rxd5 Qxd5 34. Qf1 Qd3 35. Qxd3 cxd3 36. a3 Be6 37. Kf2 Bg4 38. Bd2 Kf7 39. a4 a6 40. axb5 axb5 41. Ke1 Ke6 42. c4 bxc4 43. Bc3 Kd5 44. Kd2 Bd7 45. Ke1 Kc6 46. Kd2 Kb5 47. Ke1 Kc6 48. Kd2 Kb5 49. Ke1 g5 1/2-1/2

