Author: Mike Byrne
Date: 01:39:47 07/14/02
Go up one level in this thread
On July 14, 2002 at 02:14:33, Ron Murawski wrote:
>Horizon 3.2 drew a game against Cerebro 1.10 in Leo Dijksman's 3rd Division
>Ridderkerk tournament. Just for the record, here is the game:
>
>[Event "WBEC3_3rdDivision"]
>[Site "DUAL-P3-933"]
>[Date "2002.07.12"]
>[Round "1.3"]
>[Number "399"]
>[White "Cerebro 1.10b"]
>[Black "Horizon 3.2"]
>[Result "1/2-1/2"]
>[TimeControl "40/2400"]
>
>1. d4 d5 2. c4 c6 3. Nc3 dxc4 4. e3 b5 5. a4 b4 6. Ne4 Nf6 7. Nxf6+ exf6 8.
>Bxc4 Be7 9. Qc2 Be6 10. Ne2 Bxc4 11. Qxc4 O-O 12. O-O Qd5 13. Qc2 c5 14. e4
>Qb7 15. d5 f5 16. f3 Nd7 17. Bf4 fxe4 18. fxe4 Bf6 19. g4 h6 20. Kh1 b3 21.
>Qc1 Rfe8 22. Ng3 c4 23. Bd2 Be5 24. Bf4 Bf6 25. Qxc4 Bxb2 26. Rad1 Rac8 27.
>Qe2 Rc2 28. Rd2 Rxd2 29. Qxd2 Bf6 30. Be3 Be5 31. Bf4 Bxf4 32. Qxf4 Nf6 33.
>Qf3 b2 34. Rb1 Rc8 35. Ne2 Rc4 36. g5 Nxe4 37. gxh6 Rxa4 38. hxg7 Nd2 39.
>Qh5 Rh4 40. Rxb2 Qxb2 41. Qxh4 Qb1+ 42. Ng1 Qe4+ 43. Qxe4 Nxe4 44. Ne2 Kxg7
>45. Kg2 Kf6 46. h4 Ke5 47. h5 Nf6 48. h6 Kxd5 49. Kf1 Ke4 50. Ke1 Nh7 51.
>Kd2 Kf5 52. Kc3 Kg6 53. Kb4 Kh5 54. Nd4 Kg4 55. Ka5 Kf4 56. Ka6 Ke4 57. Ne2
>Ke3 58. Ng3 Kf4 59. Ne2+ Kf3 60. Nd4+ Kf2 61. Nf5 Kf3 62. Nd6 Kf4 63. Nxf7
>Kf5 64. Kxa7 Ke6 65. Ka6 Kxf7 66. Ka5 Ke8 67. Ka4 Kd8 68. Ka3 Kc8 69. Ka2
>Kb8 70. Ka1 Ka8 71. Kb1 Kb8 72. Ka1 Ka8 73. Kb1 Kb8 74. Ka1
>{Three fold repetition} 1/2-1/2
>
>
>I believe that Horizon had a win in hand until this position:
>
>[D] 6k1/pq3pP1/8/3P4/r3n3/5Q2/1p2N2P/1R5K b - - 0 38
>
>where Horizon played 38...Nd2 with an eval score of more that +6.00.
>
>Here's two WinBoard analysis snapshots after 5 minutes running on an AMD 1.8 GHz
>w/64 MB hash for Horizon and for Crafty.
>
>Horizon 3.2 (where +6.70 means Black is ahead)
>depth=11 15/35 +6.70 Nd2 Qh5 Rh4 Rxb2 Qxb2 Qxh4 Qb1+ Ng1 Qxg1+ Kxg1 Nf3+ Kf2
>Nodes: 77677043 NPS: 258071
>Time: 00:05:00.99
>
>Crafty 18.15 (where -5.41 means Black is ahead)
>depth=14 1/35 -5.41 1. ... Nd2 2. Qf5 Rh4 3. Rd1 b1=Q 4. Rxb1 Qxb1+ 5. Qxb1 Nxb1
>6. d6 Rh6 7. d7 Rd6 8. Ng3 Nd2 9. h4 Kxg7
>Nodes: 319129163 NPS: 1060758
>Time: 00:05:00.85
>
>It is interesting to note that Crafty 18.15 endorses Horizon's move 38...Nd2 and
>also scores it as Black ahead big-time.
>
>But when I analyzed using Chess Tiger and Fritz, I saw a different assessment.
>(In both of the following analyses, the more negative the score the better it is
>for Black.)
>
<snip>
I don't think it's an evaluation issue as much as a search issue - my latest
beta modified Crafty likes "Nd2" until it sees something bad in the search and
switches in big way to Qd5 - the Nd2 move drops to a draw score
nss depth time score variation (1)
(2) 5-> 0.33 1.27 1. ... f6 2. d6 Ra1 3. Nc3 Rxb1+ 4.
Nxb1 Kxg7 5. d7 <HT>
6 0.47 1.54 1. ... f6 2. Nf4 Qxg7 3. d6 Rc4 4.
Qe3 f5 <HT>
6-> 0.62 1.54 1. ... f6 2. Nf4 Qxg7 3. d6 Rc4 4.
Qe3 f5 <HT>
7 1.08 1.62 1. ... f6 2. Nf4 Qxg7 3. Qe2 Qg5 4.
Nd3 Ra1 5. Qxb2 <HT>
7 1.66 1.83 1. ... Ng5 2. Qf5 Ra1 3. Nc3 Rxb1+
4. Nxb1 Ne6 5. Kg1 Nxg7 6. Qf6 <HT>
(2) 7-> 1.66 1.83 1. ... Ng5 2. Qf5 Ra1 3. Nc3 Rxb1+
4. Nxb1 Ne6 5. Kg1 Nxg7 6. Qf6 <HT>
8 1.89 2.12 1. ... Ng5 2. Qf5 Ra1 3. Nc3 Qb3 4.
Qxg5 Qxc3 5. Qd8+ Kxg7 6. Qg5+ Kh7
<HT>
8 2.69 2.17 1. ... Nd2 2. Qh5 Rh4 3. Rxb2 Qxb2
4. Qxh4 Qa1+ 5. Ng1 Qxg1+ 6. Kxg1 Nf3+
7. Kf2 Nxh4 <HT>
(4) 8-> 2.70 2.17 1. ... Nd2 2. Qh5 Rh4 3. Rxb2 Qxb2
4. Qxh4 Qa1+ 5. Ng1 Qxg1+ 6. Kxg1 Nf3+
7. Kf2 Nxh4 <HT>
9 2.92 ++ 1. ... Nd2!!
(3) 9 6.00 3.92 1. ... Nd2 2. Qf5 Rc4 3. Rxb2 Qxb2
4. d6 Qa1+ 5. Kg2 Re4 6. d7 Rxe2+ 7.
Kh3 <HT>
9-> 6.64 3.92 1. ... Nd2 2. Qf5 Rc4 3. Rxb2 Qxb2
4. d6 Qa1+ 5. Kg2 Re4 6. d7 Rxe2+ 7.
Kh3 <HT>
10 9.52 3.60 1. ... Nd2 2. Qf5 Rh4 3. Rd1 b1=Q 4.
Rxb1 Nxb1 5. Ng3 Rh7 6. Nh5 Rxh5 <HT>
10-> 12.47 3.60 1. ... Nd2 2. Qf5 Rh4 3. Rd1 b1=Q 4.
Rxb1 Nxb1 5. Ng3 Rh7 6. Nh5 Rxh5 <HT>
11 19.95 3.30 1. ... Nd2 2. Qf5 Nxb1 3. Qh5 Rh4 <HT>
11-> 28.20 3.30 1. ... Nd2 2. Qf5 Nxb1 3. Qh5 Rh4 <HT>
12 50.94 -- 1. ... Nd2
12 1:50 0.05 1. ... Nd2 2. Qh5 Rh4 3. Rxb2 <HT>
12 2:46 ++ 1. ... Qxd5!!
12 4:47 3.98 1. ... Qxd5 2. Rxb2 Ng3+ 3. Kg2 Nxe2
4. Qxd5 Nf4+ 5. Kf3 Nxd5 6. Rg2 <HT>
(2) 12-> 4:58 3.98 1. ... Qxd5 2. Rxb2 Ng3+ 3. Kg2 Nxe2
4. Qxd5 Nf4+ 5. Kf3 Nxd5 6. Rg2 <HT>
Black(0): ?
time=5:17 cpu=199% mat=0 n=529641234 fh=92% nps=1668319
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