Author: Dusan Dobes
Date: 06:58:36 04/21/99
Go up one level in this thread
On April 19, 1999 at 16:47:16, Jeremiah Penery wrote:
>> [Event "?"]
>> [Site "?"]
>> [Date "1988.??.??"]
>> [Round "?"]
>> [White "Deep Thought"]
>> [Black "Valvo"]
>> [Result "0-1"]
>>
>> 1. e4 e5 2. f4 d5 3. exd5 c6 4. Nc3 exf4 5. Nf3 Bd6 6. d4 Ne7 7. dxc6 Nbxc6
>> 8. d5 Nb4 9. Bc4 O-O 10. a3 b5 11. Bb3 Na6 12. Nxb5 Qa5+ 13. Nc3 Nc5 14.
>> Ba2 Ba6 15. b4 Qc7 16. bxc5 Rfe8 17. Ne2 Qxc5 18. c4 Nxd5 19. Qd4 Qxd4 20.
>> Nxd4 Bc5 21. Kd2 Ne3 22. Kc3 Rac8 23. Bb2 Nxg2 24. Raf1 Rcd8 25. Rhg1 Re3+
>> 26. Kd2 f3 27. Rxf3 Rxf3 28. Rxg2 Rh3 29. Kc1 g6 30. a4 Bb7 31. Rf2 Ba8 32.
>> Bb1 Rb8 33. Ba2 Rd3 34. Rf4 Rd2 35. Kxd2 Rxb2+ 36. Nc2 Rxa2 37. Nc3 Rb2 38.
>> Rf6 Kg7 39. Rf1 f5 40. Nd5 Bxd5 41. cxd5 Rb3 42. h4 Kf6 43. Re1 Rh3 44.
>> Re6+ Kf7 45. a5 Rxh4 46. Rc6 Bb4+ 47. Nxb4 Rxb4 48. Rc7+ Kf6 0-1
>>
>> The analysis says that Deep Thought calculated 19 ply for its 16th move but
>> was unable to find anything better than accepting the knight sacrifice.
>
>This was (I think) a correspondence game played on RGCC or some such.
>Presumably, the move 16. bxc5 is bad - I'm wondering if any programs pick a
>different move, and at what depth and time do they switch.
>Here is the FEN:
>r4rk1/p1q1nppp/b2b4/2nP4/1P3p2/P1N2N2/B1P3PP/R1BQK2R w KQ -
>
>Jeremiah
My program picks different move at ply 13, it also shows interesting PV.
It needs over 13 hours to find 16. b5 on my hardware.
Analysis of Phalanx XXI, Pentium 150, 9MB hash:
12 78 446194 64685743 Pb4xc5 ??
12 14 888150 126660999 Pb4xc5 Ra8-e8 Nc3-e2 Qc7xc5 Pc2-c4 Ne7xd5
Qd1-d4 Nd5-e3 Bc1xe3 Re8xe3 Qd4xc5 Bd6xc5
Pa3-a4 Rf8-e8
12 -> 400:15.90 338457535 0 turns
13 -33 3614124 525392556 Pb4xc5 Ra8-e8 Nc3-e2 Qc7xc5 Pc2-c4 Ne7xd5
Qd1-d4 Nd5-e3 Bc1xe3 Re8xe3 Ke1-f1 Re3xa3
Nf3-d2 Rf8-d8
-> easy move off
13 -28 4917137 748227021 Pb4-b5 !
13 -1 6782462 1077572476 Pb4-b5 Bd6-e5 O-O Be5xc3 Ra1-b1 Nc5-e4
Pb5xa6 Qc7-c5 Kg1-h1 Ne4-f2 Rf1xf2 Qc5xf2
Qd1-d3 Ra8-c8 Bc1xf4 Pf7-f5
13 -> 1625:46.10 1565782105 1 turn
Dusan Dobes
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