E.T.Chess

By Eric Triki

The level of E.T.Chess is around 2700 Elo, so it is a very strong opponent both for the best human players and for the best chess programs. It commes with no graphical interface. The engine can used in text mode or with a Graphical User Interface supporting the Winboard protocol like Winboard or Arena.

Screenshot of Arena running E.T.Chess :

E.T.Chess + Arena

Download the latest version of E.T.Chess (316 KB) :
E.T.Chess 13/01/2008

The zip file contains 3 files : The engine recognizes only one command line option : hX where X is the number of megabytes that E.T.Chess should use.
For instance, the following command line starts E.T.Chess with Winboard and let him use 64 MB :
C:\WinBoard\winboard.exe -cp -fcp 'c:\et_chess\chess.exe h64' -scp 'c:\et_chess\chess.exe h64'

A good game of E.T.Chess :

[White "DeepFritz 8.0 (2 x 3 Ghz / 1 GB)"]
[Black "E.T.Chess (P4 1.6 GHz / 128 MO)"]
[Result "0-1"]
[ECO "E32"]
[Opening "Nimzo-Indian"]
[TimeControl "900+0"]
[PlyCount "196"]

1. c4 e6 2. d4 Bb4+ 3. Nc3 Nf6 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 c5 8. e3 h6 9. Bh4 cxd4 10. Qxd4 Nc6 11. Qd6 g5 12. Bg3 Ne4 13. Qd3 Nxg3 14. hxg3 Qf6 15. Qc2 d5 16. cxd5 exd5 17. Rd1 d4 18. e4 Rd8 19. Ne2 Rd6 20. f3 Bd7 21. f4 Qg6 22. Qd3 Rc8 23. b4 Rd8 24. Rd2 Bg4 25. e5 Bf5 26. Qf3 Rd5 27. g4 Be4 28. Qf2 Qg7 29. Ng3 Bg6 30. f5 Rxe5+ 31. Be2 d3 32. Qf3 dxe2 33. Qxc6 Ree8 34. f6 Qf8 35. Rxe2 Be4 36. Nxe4 Rc8 37. Qxe8 Qxe8 38. Rxh6 Qd7 39. Rh3 Qxg4 40. Kf2 Qf4+ 41. Rf3 Qh4+ 42. Ke3 Re8 43. Kd3 Qh1 44. Kd2 Qb1 45. Rd3 Rc8 46. Rc3 Rd8+ 47. Ke3 Re8 48. Rd3 Qf1 49. Rd4 Qg1+ 50. Kd3 a6 51. Rd2 Qb1+ 52. Ke3 Qf1 53. Re2 Qg1+ 54. Kd3 Qc1 55. a4 Qa3+ 56. Kd2 Qxa4 57. Ke3 Qa1 58. Red2 Qf1 59. Re2 Qxf6 60. Kd3 Qf5 61. Rf2 Qb5+ 62. Kc2 Qc6+ 63. Kd3 Rc8 64. g4 Kf8 65. Rd2 Qh6 66. Nf2 Qe6 67. Re4 Qb3+ 68. Ke2 Rc1 69. Red4 Rc4 70. Rd8+ Kg7 71. R8d5 f6 72. b5 a5 73. Kf1 a4 74. Kg2 Kg6 75. Rd8 Qxb5 76. Rg8+ Kf7 77. Rgd8 Qc6+ 78. Kg3 b5 79. R2d6 Rc3+ 80. Nd3 Qc4 81. Rd4 Qc7+ 82. Kf3 Ke7 83. Rh8 Qe5 84. Rhd8 b4 85. R8d5 Qh2 86. Ke3 b3 87. Rd7+ Ke6 88. R4d6+ Qxd6 89. Rxd6+ Kxd6 90. Kd2 Rc4 91. Nb2 Rc2+ 92. Kd3 Rxb2 93. Ke4 Ke6 94. Kd4 Rc2 95. Kd3 Kd5 96. Ke3 b2 97. Kf3 b1=Q 98. Ke3 Qb3# {Black mates} 0-1

An awfull game of E.T.Chess :

[White "human GM"]
[Black "E.T.Chess"]
[Result "1-0"]
[ECO "E60"]
[Opening "King's Indian"]
[TimeControl "300+12"]
[PlyCount "79"]

1. d4 Nf6 2. c4 g6 3. Bf4 Nh5 4. Bg5 f6 5. Bh4 Nc6 6. Nc3 e5 7. d5 Nb4 8. a3 Na6 9. e3 Bh6 10. d6 O-O 11. Nf3 cxd6 12. Ne4 Qb6 13. b4 d5 14. Qxd5+ Kh8 15. g4 Nc7 16. Qd6 Qxd6 17. Nxd6 Ng7 18. Rd1 Nge6 19. Be2 Kg8 20. O-O g5 21. Bg3 Rd8 22. h4 Ne8 23. hxg5 Bxg5 24. Nxg5 Nxg5 25. Bh4 Nxd6 26. Rxd6 Rf8 27. f3 b6 28. Bd3 h6 29. f4 exf4 30. exf4 Ne6 31. Re1 Rb8 32. Be4 Kh8 33. Kh2 Rf7 34. f5 Ng5 35. Bd5 Rf8 36. Re7 b5 37. Bxg5 hxg5 38. c5 a5 39. Ba2 Rb6 40. cxb6 {Black resigns} 1-0