The Games of Brute Force

1. d4 d5 2. Nf3 f6 3. Nc3 g5 4. g3 g4 5. Nd2 Nc6 6. Nb3 Bf5 7. Bg2 e6 8. Bf4 Nb4 9. e4 Bxe4 10. Nxe4 e5 11. dxe5 dxe4 12. Bxe4 Qxd1+ 13. Rxd1 c6 14. a3 Na6 15. exf6 Nxf6 16. Bf5 Nc5 17. Nxc5 Bxc5 18. O-O b5 19. Rfe1+ Kf7 20. b4 Bb6 21. Re6 Rhe8 22. Rxe8 Rxe8 23. Rd6 Re1+ 24. Kg2 Re2 25. Rd2 Rxd2 26. Bxd2 h5 27. Bd3 a6 28. c4 Ng8 29. cxb5 axb5 30. Be4 Ne7 31. Bg5 Nd5 32. f3 gxf3+ 33. Kxf3 Kg7 34. h4 Ba7 35. g4 hxg4+ 36. Kxg4 Bb8 37. Kf3 Bc7 38. h5 Bb6 39. h6+ Kf7 40. h7 Kg7 41. Bh6+ Kh8 42. Bf8 Bd8 43. Bd6 Bf6 44. Kg4 Bb2 45. Kf3 Kg7 46. Kf2 Bxa3 47. Be5+ Nf6 48. Bxf6+ Kxf6 49. h8=Q+ Kf7 50. Qc3 1-0

1. d4 d5 2. Nc3 Nf6 3. f3 Nc6 4. e4 dxe4 5. d5 Ne5 6. fxe4 Bg4 7. Qd4 Nfd7 8. h3 c5 9. Qf2 Brute Force could have considered dxc6 e.p. but this was an unknown bug in the program at this time. 9... Bh5 10. g4 Bg6 11. Be3 Rc8 12. Rd1 I did not like this sort of move, and was something I later fixed. After the fix, the program would move 12. b3 instead. 12... Nf6 13. Bxc5 Bxe4 14. Bb5+ Ned7 15. Bxd7+ Qxd7 16. Rh2 Bxd5 17. g5 Qe6+ 18. Nge2 Ne4 19. Nxe4 Qxe4 20. Rd4 Qf3 21. Qxf3 Bxf3 22. Bxa7 Rxc2 23. Rd2 Rxd2 24. Kxd2 Bxe2 25. Rxe2 e6 26. a4 Bb4+ 27. Kd3 O-O 28. Re4 Rd8+ 29. Rd4 Rxd4+ 30. Bxd4 g6 31. Bc3 Bxc3 32. bxc3 f5 33. a5 e5 34. c4 Kf7 35. c5 e4+ 36. Kd4 Ke7 37. h4 Ke6 38. Kc4 e3 39. Kd3 e2 40. Kxe2 Kd5 41. c6 Game was halted. *

1. d4 d5 2. Nc3 Nf6 3. f3 Nc6 4. e4 dxe4 5. d5 Ne5 6. fxe4 Bg4 7. Bb5+ c6 8. Be2 cxd5 9. Bxg4 Nfxg4 10. exd5 Rc8 11. h3 Nf6 12. Qd4 Nc6 13. Qc5 e6 14. Qb5 Nxd5 15. Nxd5 Qxd5 16. Qxd5 exd5 17. c3 Bd6 18. Be3 O-O 19. O-O-O Rfe8 20. Rxd5 Rxe3 21. Rxd6 Rd8 22. Rxd8+ Nxd8 23. Kd2 Re4 24. Kd3 f5 25. c4 Nc6 26. Kc3 a5 27. Nf3 a4 28. Nd2 Re3+ 29. Kc2 Nb4+ 30. Kb1 a3 31. Rd1 axb2 32. c5 Nd3 33. Nf1 Re1 34. Rxe1 Nxe1 35. g3 From this point on, Brute Force was using a 7 half-move lookahead plus a quiescence (capture) search. 35... Nd3 36. g4 fxg4 37. hxg4 Kf7 38. Ne3 g5 39. Nc4 Nxc5 40. a3 Nd3 41. Nxb2 Ne5 42. a4 Ke7 43. a5 Ke6 44. Ka1 Since Brute Force is down in points, the algorithm to keep kings together is disengaged. 44... Ke7 45. Kb1 Actually the move Brute Force made was 45. a2, but Kb1 was typed into the PDP program by mistake. 45... Kf7 46. Kc2 Ke7 47. Nd3 Nxg4 48. Nc5 Ne3+ 49. Kd3 Nd5 50. Kd4 Nb4 51. Kc4 Nc6 52. Nxb7 g4 53. Kc5? The losing move. An error was in the program that did not allow it to see that the pawn was about to queen. This was fixed after this game. 53... Kd7 54. a6 g3 55. Kb6 g2 56. Nc5+ Kd6 57. Ne4+ Ke7 58. a7 g1=Q+ 59. Kxc6 Qxa7 60. Nc5 Qa2 61. Nb7 Qc4+ Adjudicated a win for Black. 0-1

1. d4 d5 2. c4 dxc4 3. Nc3 c6 4. Bf4 Na6 5. e3 b5 6. Nf3 f6 7. Be2 g5 8. Bg3 g4 9. Nd2 f5 10. Bh4 Bh6 11. e4? An admitted oversight by white. 11... Qxd4 12. exf5 Bxd2+ 13. Qxd2 Qxd2+ 14. Kxd2 Bxf5 15. f3 O-O-O+ 16. Ke1 gxf3 17. Bxf3 b4 18. Ne4 Bxe4 19. Bxe4 Rd4 20. Bf5+ Kb8 21. Bg3+ Nc7 22. Ke2 Nf6 23. Rad1 Rxd1 24. Rxd1 Nfd5 25. Rd4 c3 26. b3 h5 27. Kd3 a5 28. Rc4 Kb7 29. Bd7 Rh6 30. Re4 c5 31. Re5 h4 32. Bf2 Rd6 Brute Force thinks that it does not have to lose a pawn since 33. Rf5 Nf4+ 35. Kc4 Nxf2 36. Kxc5 which looks like an even exchange. 33. Bf5 Nf4+ 34. Kc4 e6 35. Be4+ The implications of this check were too deep for Brute Force to see at move 32. 35... Kc8 Now it is too late and at least two pawns must be lost. 36. Rxc5 h3 37. gxh3 Nxh3 38. Bg3 Rd7 39. Rxa5 c2 40. Bxc2 Nd5 41. Rc5+ Kd8 42. Bh4+ Ke8 43. Be4 Nhf4 44. Bg3 Ra7 45. Bxd5 Nxd5 46. h4 Rxa2 47. h5 Re2 48. h6 Re4+ 49. Kb5 Nc3+ 50. Ka6 Nd5 The losing move. An error in the program did not allow it to see that the pawn was about to queen. This was worked on and fixed a week later, on August 29th 51. h7 Nc7+ 52. Rxc7 Re3 53. h8=Q+ 1-0

1. e4 d5 This move often took the opponent out of its "book" 2. exd5 Qxd5 3. Nc3 Qe6+ 4. Nge2 Bd7 5. d4 Na6 Obviously, 5. ... Nc6 is bad 6. Bg5 h6 7. Be3 Qb6 Pressure on b2 while opening the center 8. Qb1? Poor move 8... g5 9. h4 gxh4 10. d5 Qb4 11. Bd4 e5 The dreaded en-passant bug first rears its head 12. dxe6 f6 13. a3 Qe7 14. exd7+ Kd8 BF sees the pawn as won and does not see a need to take it yet 15. Qa2 c5 16. O-O-O cxd4 17. Nxd4 Nc5 18. Bc4 Qg7 19. Ne4 Qxg2 20. Nxc5 Qg5+ 21. Rd2 Qxd2+ Missing the fork that is coming with 23. Ne6+ and the game is now lost 22. Kxd2 Bxc5 23. Ne6+ Kxd7 Finally capturing the pawn 24. Nxc5+ Kc7 25. Bd5 Ne7 26. Bxb7 Rad8+ 27. Kc3 Rb8 28. Qe6 Ng8 29. Qc6+ Kd8 30. Qd7+ 1-0

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qe5+ 4. Nge2 a5 5. d4 Qf5 6. Be3 g5 7. Ng3 Qg6 8. Bd3 f5 9. O-O Nf6 10. Nb5 Kd8 11. d5 g4 12. Bd4 e6 13. dxe6 Bb4 14. Bxf5 Ke7 15. Bxg6 hxg6 16. Bxf6+ Kxf6 17. Qd4+ Ke7 18. Qg7+ Kxe6 19. Nxc7+ Kd6 20. Nxa8 Re8 21. Qc7+ Ke6 22. Rfe1+ Bxe1 23. Rxe1+ Kf6 24. Rxe8 Bd7 25. Qe5+ Kf7 26. Qe7+ 1-0

1. d4 Nf6 2. Nc3 Nc6 3. d5 Nxd5 4. Qxd5 d6 5. a3 e6 6. Qd2 Be7 7. b4 Bf6 8. b5 Ne5 9. f4 Ng4 10. Nf3 c6 11. bxc6 bxc6 12. h3 Bh4+ 13. Kd1 Nf2+ 14. Ke1 Nxh1+ 15. g3 Nxg3 16. Qe3 Qf6 17. Nxh4 Qxh4 18. Qf3 d5 19. Qg4 Qxg4 20. hxg4 Nxf1 21. Kxf1 a6 22. Be3 e5 23. fxe5 Bxg4 24. a4 h5 25. a5 h4 26. Ra4 Be6 27. Bf2 h3 28. e3 h2 29. Bg3 h1=Q+ 30. Ke2 Qc1 31. Kd3 Rb8 32. e4 Rb2 33. Ra3 Rxc2 34. Na2 Qd2+ 0-1

1. d4 d5 2. Nc3 Nc6 3. Bf4 Nf6 4. Nb5 e5 5. Bxe5 Bb4+ 6. c3 Nxe5 7. dxe5 Bxc3+ 8. Nxc3 Ne4 9. Nxe4 dxe4 10. Qa4+ Bd7 11. Qxe4 b5 12. g4 O-O 13. Bg2 c6 14. h4 a5 15. O-O-O Ra6 16. Qd4 f5 17. Qxd7 Qxd7 18. Rxd7 fxg4 19. Rd6 Rxf2 20. Bxc6 Rf5 21. Bd5+ Kf8 22. Rxa6 Rxe5 23. e4 a4 24. Rb6 g5 25. hxg5 Kg7 26. Rb7+ Kg6 27. Rhxh7 Kxg5 28. Rxb5 Kf4 29. Ra5 a3 30. Rf7+ Ke3 31. Rxa3+ Kd4 32. Rg7 Kc5 33. Rxg4 Kd6 34. Ra6+ Kc5 35. Nf3 Re7 36. Rc6+ Kb4 37. e5+ Kb5 38. Nd4+ Ka5 39. Nb3+ 1-0

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qe6+ 4. Be2 Qg6 5. Bf3 Qe6+ 6. Nge2 Nf6 7. O-O g5 8. d4 g4 9. Nf4 Qf5 10. Be2 Bh6 11. Bd3 Qd7 12. Nfe2 Bxc1 13. Rxc1 Nc6 14. Bc4 Na5 15. Bb5 c6 16. Bd3 b5 17. Ne4 Qe6 18. Nxf6+ exf6 19. Nf4 Qe7 20. Re1 Be6 21. Nxe6 fxe6 22. Qxg4 Kf7 23. Bf5 h5 24. Bxe6+ Kf8 25. Qf5 Rd8 26. Bb3 Qd6 27. Re6 Qd7 28. Rxf6+ Ke8 29. Re1+ Qe7 30. Rxe7+ Kxe7 31. Qe6+ 1-0

1. e4 e5 2. Nf3 Nc6 3. Nc3 Bc5 4. Bc4 d6 5. O-O Be6 6. Nd5 Bxd5 7. Bxd5 Nf6 8. Bxc6+ bxc6 9. d3 O-O 10. Be3 Bxe3 11. fxe3 Rb8 12. Rb1? Horrible. This was caused by Brute Force's evaluation function. A parameter is being added to the function to fix this problem. 12... Qe7 13. Ng5 d5 14. Qf3 Nxe4 15. Nxe4 dxe4 16. Qxe4 Rb6 17. Rf5 Re8 The rook at b1 is stuck defending the pawn, so this move is as good as any. 18. Kf2 c5 19. Qd5 g5? Better is g6. 20. d4 exd4 21. Rxg5+ Kf8 22. Qxc5 Eliminating black's checking threat at e3 and forcing the exchange of queens. 22... Qxc5 23. Rxc5 dxe3+ 24. Ke2 Rf6 25. Rf1 Rxf1 26. Kxf1 e2+ 27. Ke1 Black's e-pawn will get him into trouble. It ties down black's rook to the e-file, whereas white's rook is free to roam. 27... Re7 28. Rd5 Re6 29. c4 Kg7 30. Rf5 Re8? Black will finally lose a wing pawn. 31. Ra5 It is now about 3 p.m. and the Univerity's computer is being used more heavily used by other users. The CPU time used by Brute Force drops substantially for the next 20 moves. 31... c5 32. Rxc5 Kg6 33. h4 f5 34. g3 h6 35. Rd5 Kf6 36. Rd6+ Kg7 37. Rd7+ Kf6 38. Rxa7 h5 39. Rd7 Re3 40. Rd6+ Kg7 41. Rd5 Rxg3 42. Rxf5 Kg6 43. Re5 Rg1+ 44. Kd2 Rh1 45. Kxe2 Rh3 46. Kd2 Rh2+ 47. Kd3 Rxb2 48. a4 Rf2 49. Ke3 Rb2 50. Kd3 Rf2 51. Ke3 Rb2 52. Kd4 Avoiding a draw by repetition. 52... Rb3 53. a5 Ra3 54. Rg5+ Kh6 55. Rf5 Kg6 56. Ke4 The upcoming combination is Brute Force's only tactical error in the game. This seems to have happened because of an unavoidable 9 half move combination that was outside the program's search capability. 56... Rc3 57. Rg5+ Kh6 58. c5 Rc4+ 59. Ke3 Rxh4 60. Rf5 Kg6 61. Rd5 Rh3+ 62. Kf4 Rb3 63. c6 Rb4+ 64. Ke5 Kg7 65. c7 Rc4 66. Kd6 h4 67. Rc5 Rd4+ 68. Ke5 Rd3 69. c8=Q Re3+ 70. Kf5 Resigns. Actually BELLE did not formally resign. What happened was it did not respond to white's previous move. I took that as constituting a resignation. 1-0

1. d4 d5 2. Nc3 Nf6 3. f3 Nc6 4. e4 e6 5. e5 Nd7 6. h4 Be7 7. g3 O-O 8. a3 f5 Both programs know about en passant. 9. f4 Rf7 10. Be2 a5 11. Nb5 Ra6 12. Nxc7 Qxc7 13. Bxa6 bxa6 Brute Force considers a rook and pawn equivalent to a bishop and knight. 14. c3 Bb7 15. Kd2 Running out of things to do. The 1977 program was especially prone to such moves in non-tactical situations. The 1978 program is not as bad. 15... Qb6 16. a4 g6 17. Ke3 h5 A pawn structure has developed which is very difficult for a "tactical" program to bust through. 18. Ra2 Kg7 19. Ra1 Rf8 20. Qc2 Re8 21. Ke2 Rc8 Black sees its chance to break through. 22. Nf3 Nb4 23. Qb1 Nc6 Alas, the knight has nowhere to go. 24. Ng5 Bxg5 25. hxg5 Qb3 26. Ra3 Qc4+ 27. Ke3 Re8 28. Kf2 Ne7 29. b3 Qc7 30. b4 axb4 31. cxb4 Qc4 32. Rd3 Bc6 33. Qb3 Qxb3 34. Rxb3 Bxa4 Finally, black has won a pawn. 35. Ra3 Bb5 36. Rd1 Bc4 37. Rh1 Nc6 38. Kf3 Nb6 39. Re1 Re7 Black had one final chance with 39... Na7 followed by 40... Nb5 but the program's evaluation function would not let it move its knight to the edge of the board when the 7 half-move lookahead sees no feasible gain. This can be fixed, but would take some time. 40. Ra1 Rd7 41. Be3 Kf7 42. Bg1 Kg7 43. Ra3 Kf8 44. Be3 Kg7 45. Raa1 Kf8 46. Bf2 Kg7 47. Re3 Draw. I gave up hope for either side. 1/2-1/2

1. e4 c6 2. Nf3 d5 3. Nc3 dxe4 4. Nxe4 e6 5. Bc4 b5 6. Be2 Be7 7. O-O Ba6 8. d4 Nf6 9. Nxf6+ Bxf6 10. Ne5 O-O 11. Be3 Qc7 12. f4 h6 13. Qd3 c5 14. Bf3 b4 15. c4 bxc3 e.p. 0-1

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 Nxd4 5. Nxd4 exd4 6. Qxd4 Be7 7. Bf4 O-O 8. Nb5 c5 9. Qa4 a6 10. Nd6 Ng4 11. Be2 h5 12. Bxg4 hxg4 13. O-O-O Qc7 14. Qc4 g5 15. Be5 Qc6 16. Qe2 Bxd6 17. Rxd6 Qa4 18. Qxg4 Re8 19. Qxg5+ Kf8 20. Rh6 Qxc2+ 21. Kxc2 f6 22. Qxf6+ Kg8 23. Qg7+ 1-0

1. e4 d5 2. exd5 e5 3. Nc3 f5 4. Nf3 e4 5. Ne5 Bb4 6. Bc4 Ne7 7. Qh5+ g6 8. Qd1 Nd7 9. Nxd7 Bxd7 10. O-O c6 11. dxc6 Bxc6 12. Be6 Qd6 13. Bc4 Qd4 14. Be6 Qe5 15. Bc4 O-O-O 16. Re1 h5 17. Re3 b5 18. Bf7 h4 19. Qe2 Rh7 20. Bb3 Bc5 21. Rh3 Rdh8 22. d4 Bxd4 23. Kf1 Kb8 24. Bg5 b4 25. f4 exf3 e.p. 0-1

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 Bd7 7. Nxc6 Bxc6 8. Qd4 e5 9. Qe3 Qb6 10. Qxb6 axb6 11. Nd5 Bxd5 12. Bxd5 Nxd5 13. exd5 Ra5 14. Be3 Rxd5 15. c4 Ra5 16. Bxb6 Ra6 17. Be3 Ra4 18. b3 Ra8 19. O-O Be7 20. Rfd1 O-O 21. Rd5 Ra3 22. Rb5 Rb8 23. Kf1 h6 24. Ke2 Rba8 25. Rxb7 Bh4 26. Rd1 Rxa2+ 27. Kf3 Re8 28. Rxd6 e4+ 29. Kg4 Bxf2 30. Bf4 Be1 31. Kh3 g5 32. Be3 Re2 33. Bd4 h5 34. g4 hxg4+ 35. Kxg4 Bf2 36. Kxg5 Bxd4 37. Rxd4 Rg2+ 38. Kf4 Rxh2 39. Rbd7 e3 40. Kf5 e2 41. Rg4+ Kh7 42. Rxf7+ Kh8 43. Re4 Rxe4 44. Rf8+ Kg7 45. Rf6 Rh5+ 46. Kxe4 e1=Q+ 47. Kd4 Qd2+ 48. Ke4 Kxf6 49. b4 Rf5 50. b5 Rf4+ 0-1

1. e4 e5 2. Nc3 Nf6 3. Bc4 Nc6 4. Nf3 Bc5 5. Ng5 O-O 6. O-O Nd4 7. Nxf7 Rxf7 8. Bxf7+ Kxf7 9. d3 d5 10. Nxd5 Bg4 11. Qd2 Nxd5 12. exd5 Qxd5 13. c4 Qc6 14. b4 Ne2+ 15. Kh1 Bd4 16. Bb2 Bf3 17. Qg5 Bxg2+ 18. Qxg2 Qxg2+ 19. Kxg2 Nf4+ 20. Kf3 Bxb2 21. Rad1 Bd4 22. Rg1 h5 23. h4 Rd8 24. b5 Rd6 25. a4 Rf6 26. Ke4 Ne2 27. Rxg7+ Kxg7 28. f4 Nc3+ 29. Kf3 Rxf4+ 30. Kg2 Nxd1 31. b6 axb6 32. a5 bxa5 33. c5 Nf2 34. c6 bxc6 35. Kg3 Nxd3 36. Kg2 e4 37. Kh2 e3 38. Kg2 e2 39. Kh2 Rf2+ 40. Kh3 e1=Q 41. Kg3 Qe3+ 0-1