Author: Vincent Diepeveen
Date: 04:48:42 02/26/02
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On February 25, 2002 at 20:27:56, K. Burcham wrote: > >I know most here are familiar with all of this, but I thought this >was interesting reading. Cilkchess must have been strong. >kburcham > >http://supertech.lcs.mit.edu/cilk/ > >Cilkchess came in fourth in the 1999 world computer championships. >Cilkchess beat Junior, Rebel, Nimzo, Chesstiger, Hiarcs, Diep. in the standings. Actually i didn't play the big cilkchess but 'mini' in paderborn and DIEP won from it. I did lose to cilkchess in the dutch champs though where it participated. Programmer is Don Dailey, perhaps he can react himself here. He's a real cool guy. We played some game cilkchess - diep at my home. In world champs i remember it usually searched around 17 ply. Note that i outsearched any opponent in the endgame. I got 20 ply there. Reason is my endgame eval was more stupid than theirs and i ran on Bob's quad in wcc99. Best regards, Vincent >But I did notice that Cilkchess did not have to play most of these in the >tournament. >Maybe luck of the draw, but still interesting. > >"Cilkchess is a parallel program which will be running on a 256-processor SGI >Origin 2000 >at NASA Ames for the WCCC. Cilkchess won First Prize in the 1996 Dutch Open and >took >Second in both 1997 and 1998. Our earlier program, *Socrates, took Second in the >1995 WCCC, tying the winner Fritz in the main part of the tournament, but losing >in the playoff. > >Cilkchess is programmed in the Cilk multithreaded programming language, which >allows > highly irregular programs, such as chess, to be written with ease for parallel >computers. >The program uses a parallel variant of the MTD(f) search algorithm that >incorporates >null-move forward pruning, but few extensions. The evaluation function has been >tuned >from thousands of self-play games using a temporal-coherence learning algorithm. >The >transposition table is stored in 32 gigabytes of shared memory. In the late >middle game, >Cilkchess typically looks more than 15 ply (half-moves) ahead and performs 5-11 >million >make-moves per second". > >http://www.uni-paderborn.de/~wccc99/ > >[Event "WCCC99"] >[Site "Paderborn"] >[Date "1999.06.19"] >[Round "7"] >[White "Hiarcs"] >[Black "Cilkchess"] >[Result "0-1"] > >1. d4 e6 2. c4 c5 3. Nf3 Nf6 4. e3 cxd4 5. exd4 d5 6. Nc3 Nc6 7. Bg5 Be7 8. c5 >O-O >9. Bb5 Bd7 10. O-O b6 11. Na4 bxc5 12. Bxf6 Bxf6 13. Nxc5 Be8 14. Rc1 Rc8 >15. Ba6 Rb8 16. b3 Qa5 17. a4 Rb4 18. Nd3 Rb6 19. Bb5 Rxb5 20. axb5 Nxd4 >21. Nxd4 Bxd4 22. Qc2 Bxb5 23. Rfd1 Qb6 24. Nc5 Be5 25. Qd2 Qb8 26. g3 Bf6 >27. Rc2 Qa8 28. f3 a5 29. Rdc1 Be7 30. Qd4 Bg5 31. f4 Bf6 32. Qd2 d4 33. Nd3 Be7 >34. Rd1 Qf3 35. Ne5 Qe4 36. Ra2 d3 37. Qg2 Qd4+ 38. Kh1 Bb4 39. Qb7 Qc5 40. Qe4 >d2 >41. Kg2 Qb6 42. Rc2 Rd8 43. g4 f6 44. Nc6 Qb7 45. Qxe6+ Kf8 46. Kf2 Re8 47. Qd5 >Bxc6 >48. Rxc6 Qa7+ >0-1
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