A dominating start by Houdini

Game 1: Rybka 0-1 Houdini
Game 2: Houdini 1/2 Rybka
Game 3: Rybka 0-1 Houdini
Game 4: Houdini 1-0 Rybka

Score after 4 games: Houdini 3.5 - .05 Rybka

White: Rybka 4.0
Black: Houdini 1.5aOpening: Anti-Marshall Variation, Ruy Lopez (C88)
Game 3
Time control: 150' + 30"

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. a4 b4 9. a5 d6 10. c3 Rb8 11. h3 bxc3 12. dxc3 Qe8 13. Ba4 Bd7 14. Qe2 Ra8 15. Bc2 Qb8 16. b4 Nd8 17. Bd2 Ne6 18. Na3 Re8 19. Nc4 Qb7 20. Rad1 Bc6 21. Rb1 Nh5 22. g3 Bb5 23. Bd3 Nf6 24. Nb2 Bd7 25. Bc2 h6 26. Kg2 Rad8 27. Bd3 Qa8 28. Kh2 Bf8 29. Qd1 Bc6 30. Qc2 Bb7 31. Nc4 Re7 32. Bc1 Rb8 33. Bb2 Rbe8 34. Re3 Rd8 35. Rbe1 Bc6 36. Ncd2 Ree8 37. Rb1 Bd7 38. Ree1 Be7 39. Qd1 Bc8 40. Qe2 Bb7 41. Ba1 Rb8 42. Bc4 Bc8 43. Kg2 Qa7 44. Bb2 Qb7 45. Ba3 Qa8 46. Kg1 Bf8 47. Bd3 Bb7 48. Ra1 d5 49. exd5 Nxd5 50. Nxe5 Rbd8 51. Bf5 Ng5 52. Qc4 Nxb4 53. h4 Bh1 54. Qf1 Rxd2 55. Bxb4 Ne4 56. Ng4 c5 57. Ba3 Qc6 58. Re3 h5 59. Bxe4 Bxe4 60. Nh2 Bf5 61. Rxe8 Qxe8 62. Nf3 Bd3 63. Qg2 Be4 64. Re1 Rd8 65. Qf1 Bxf3 66. Rxe8 Rxe8 67. Qxa6 Re1+ 68. Qf1 Rxf1+ 69. Kxf1 Bb7 70. Ke2 Ba6+ 71. Kf3 f6 72. Ke4 Bb7+ 73. Kf4 Kf7 74. Ke3 Ba6 75. Bc1 Ke6 76. Ke4 Be7 77. Be3 Be2 78. Bc1 Bd8 79. Ba3 Bxa5 80. Bxc5 Bxc3 81. Ba3 Ba6 82. Bf8 g5 83. hxg5 fxg5 84. Bh6 Bb7+ 85. Kd3 Bf6 86. Ke3 0-1

White: Houdini 1.5a
Black: Rybka 4.0Opening: Pseudo-King's Indian Variation; A48 (A48)
Game 4
Time control: 150' + 30"

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 c6 5. Bg2 O-O 6. O-O d5 7. Nbd2 Bf5 8. b3 Ne4 9. Bb2 Nd7 10. Nh4 Nxd2 11. Qxd2 Be6 12. e4 dxe4 13. Bxe4 Bh3 14. Rfe1 Re8 15. Nf3 Nf6 16. Bd3 Qc7 17. Bf1 Bxf1 18. Kxf1 a5 19. Qe2 e6 20. Kg1 a4 21. b4 Ng4 22. Bc1 Nh6 23. Bf4 Qe7 24. Bg5 Qd6 25. Bxh6 Bxh6 26. c5 Qd5 27. Rad1 a3 28. Ne5 Ra4 29. Rb1 Bg7 30. Red1 Rd8 31. Nc4 Ra6 32. Rb3 Bxd4 33. Re3 b5 34. Ne5 Ra4 35. Qe1 Qxa2 36. Nxc6 Qc4 37. Nxd8 Bxe3 38. Qxe3 a2 39. Qe5 Qb3 40. Ra1 Rxb4 41. Kg2 Qc4 42. Rd1 Qe4+ 43. Qxe4 Rxe4 44. Ra1 Re2 45. c6 Rc2 46. c7 Kf8 47. Rxa2 Rxc7 48. Ra8 Ke7 49. Rb8 Kd6 50. Nb7+ Kc6 51. Na5+ Kc5 52. Nb3+ Kb4 53. Nd4 Rc5 54. f4 Kc4 55. Nf3 b4 56. Kf2 Kc3 57. Ke2 h6 58. Rb7 Rc8 59. Nd2 f5 60. Rb6 g5 61. h4 gxh4 62. gxh4 Rc7 63. h5 Rg7 64. Rxe6 Rc7 65. Rxh6 Re7+ 66. Kd1 Rd7 67. Kc1 Rc7 68. Rd6 b3 69. h6 b2+ 70. Kd1 Kb4 71. Rb6+ Kc5 72. Rxb2 Rh7 73. Nb3+ Kc4 74. Na5+ Kc5 75. Rh2 Kd5 76. Ke2 Ke4 77. Rh4 1-0

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