The chess grandmaster!

When I recently got my Commodore CHESSmate, I was curious to see how the CHESSmate, which in essence is nothing more than a modified KIM-1 with a 6504 CPU in which the whole chessprogram was stored in 4KB of ROM, would hold up against a modern day opponent.

For this, I loaded up the chess program on and placed the settings to “Hard”.  I thought that the CHESSmate would be no match for this modern opponent as even in the 70s people were quite amazed that a complex chess algorithm could even be stored in such a limited amount of memory.  An old press article from a German chess magazine even stated that the CHESSmate would be no match for an intermediate chess player.

Nevertheless, I wanted to see it for myself, so off I went inserting all the moves the opponent did into the CHESSmate and in turn making the suggested moves by the CHESSmate on the site.
To my surprise, the match was well balanced with some interesting and tactical moves being made by both systems.  It was then fun to see that after about 40 minutes of play, the opponent offered a draw!

So, even the hardest computer opponent was not able to beat this oldie from the 70s.  Peter Jennings, the developer of the algorithm for the CHESSmate (called Microchess and first available on the KIM-1 in 1977) really did some magic here!

In the next few weeks, I’ll be putting the CHESSmate into the arena against some other chess opponents and see how well it does against those.

Here we go for a game of chess!

Looks like the game is well balanced offers a draw!

Below you can find the PGN of the game:

[Site “”]
[Date “2011.01.08”]
[White “Computer – Hard”]
[Black “Player”]
[Result “½-½”]
 1. c3 e5 2. d4 exd4 3. Nf3 dxc3 4. Nxc3 d5 5. Qxd5 Qe7 6. e4 Nf6 7. Qb5+ Bd7 8. Qxb7 Bc6 9. Bb5 Qd7 10. Bxc6 Qxc6 11. Qxa7 Rxa7 12. O-O Nxe4 13. Nxe4 Qxe4 14. Re1 Qxe1+ 15. Nxe1 Bb4 16. Nd3 Bd6 17. g3 O-O 18. Bf4 Bxf4 19. Nxf4 Nc6 20. Rc1 g5 21. Rxc6 gxf4 22. a3 fxg3 23. hxg3 Rd8 24. Rc2 Rd1+ 25. Kh2 Ra1 26. Rc3 Ra2 27. Rb3 Ra4 28. Kg1 Ra1+ 29. Kg2 Ra2 30. Kg1 Ra1+ 31. Kg2 Rg4 32. Rc3 Rd1 33. Rxc7 Rd2 34. b3 Rg5 35. Rc8+ Kg7 36. Rc3 Rd1 37. f4 Rd2+ 38. Kf3 Rg6 39. g4 Rd1 40. f5 Rf1+ 41. Ke2 Rxg4 42. Kxf1 Rf4+ 43. Ke2 Rxf5 44. Re3 Rd5 45. a4 Rd4 46. Rd3 Rxd3 47. Kxd3 Kf6 48. a5 h6 49. Kd4 Ke6 50. a6 f6 51. a7 h5 52. a8=Q f5 53. Qc6+ Kf7 54. Ke5 h4 55. Qg2 h3 56. Qc6 h2 57. Qe6+ Kg7 58. Qxf5 h1=Q 59. Qg5+ Kf7 60. Qf4+ Kg6 61. Qe4+ Qxe4+ 62. Kxe4 Kg5 63. Kd4 Kf4 64. b4 Kf3 65. Kd3 Kg4 66. b5 Kf4 67. b6 Ke5 68. b7 Kf5 69. Ke2 Ke4 70. Kd1 Kd3 71. b8=Q Kc4 72. Qb6 Kd5 73. Qh6 Ke4 74. Qb6 Kd3 75. Qc7 Ke3 76. Qf7 Kd4 77. Qd7+ Ke5 78. Qc6 Kf4 79. Qd6+ Ke3 80. Qd7 Kf2 81. Qc6 Kg3 82. Qe4 Kh2 83. Kc1 Kg1 84. Qg6+ Kf2 85. Qg4 Ke1 86. Kb2 Kd2 87. Qe4 Kd1 88. Qf4 Ke2 89. Qe3+ Kxe3 90. Kc2 Ke4 91. Kc3 Kf4 92. Kb2

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4 Responses to The chess grandmaster!

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  2. Robby "The C= guy"

    Playing chess against the computer, in 1959!

  3. Pingback: Chessmate vs. Kasparov | A Commodore Geek's Blog

  4. Pingback: CHESSmate vs. Videopac C7010 | A Commodore Geek's Blog

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