Author: Ferdinand S. Mosca
Date: 01:42:13 01/03/01
Go up one level in this thread
On January 03, 2001 at 03:35:57, Pete Galati wrote: >On January 02, 2001 at 02:45:27, Ferdinand S. Mosca wrote: > >>On January 02, 2001 at 01:24:15, Steve Timson wrote: >> >>>This position is from a game Chester played on ICC vs. a human. >>> >>>[D] 1r3rk1/pbqnnppp/4p3/2ppP3/p2P4/B1PB1N2/2P2PPP/R2QR1K1 w - - 0 15 >>> >>>Chester's opponent played Bxh7 and went on to win. Chester has a very hard time >>>understanding this position. It doesn't realize Bxh7 is a good move until a few >>>moves down the resulting sequence (Bxh7 Kxh7 Ng5+ Kg6 and it sees the swing >>>after Qg4). How do other programs do here? Do they see Bxh7 in a reasonable >>>time period? >>> >>> - Steve >> >> >> >>Hi Steve, >> >>Yace on P3_450 found Bxh7 in less than 27 seconds. >>This position is a bit hard for programs since it gives up material. >> >>Dinan > >With the Dos Comet on a Celeron700 in Windows, approx 18mb hash, it took 77 >seconds. I have doubts that this is very difficult for a program at all. They >can see the King getting trapped real fast. I just wish I could see the rest of >what Comet is thinking, but that King appears to be in big trouble. > >Pete > >Comet-B.27 Wed Jan 3 02:12:29 2001 > >depth score sec nodes pv > 1. +0.19 0 947 d3b5 > 2. +0.15 0 3466 a3c5 d7c5 d4c5 c7c5 a1a4 > 3. +0.15 0 10709 a3c5 d7c5 d4c5 c7c5 a1a4 > 4. +0.11 0 12140 a3c5 d7c5 d4c5 f8c8 f3g5 > 4. +0.11 0 41242 a3c5 d7c5 d4c5 f8c8 f3g5 > 5. +0.02 0 49891 a3c5 d7c5 d4c5 f8c8 a1a4 c7c5 d1d2 > 5. +0.11 0 80031 d1d2 f8e8 d4c5 e8c8 a3b4 d7c5 b4c5 > 5. +0.11 1 133031 d1d2 f8e8 d4c5 e8c8 a3b4 d7c5 b4c5 > 6. +0.14 2 245899 d1d2 f8e8 a3c5 d7c5 d4c5 c7a5 e1b1 > 6. +0.14 5 766414 d1d2 f8e8 a3c5 d7c5 d4c5 c7a5 e1b1 > 7. +0.13 7 1067950 d1d2 f8c8 e1b1 e7g6 a3c5 d7c5 d3g6 > 7. +0.13 12 1694460 d1d2 f8c8 e1b1 e7g6 a3c5 d7c5 d3g6 > 8. +0.04 24 3132774 d1d2 f8e8 e1b1 b7a8 d2g5 b8b1 a1b1 > 8! +0.26 77 11278271 d3h7 g8h7 f3g5 h7h6 d1g4 e7g6 g5e6 > 8! +0.53 79 11826970 d3h7 g8h7 f3g5 h7h6 d1g4 c5d4 a3e7 > 8. +0.56 83 12775906 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 a3b4 > 8. +0.56 83 12798067 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 a3b4 > 9? +0.42 85 13314268 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4f5 > 9? +0.15 113 18995944 d3h7 g8h7 d4c5 > 9. +0.15 114 19120060 d3h7 g8h7 d4c5 > >==> My Move: d3h7 in 1:59 Pete, For a human this is a typical position attacking h7 of a castled king. Move Bxh7 right away before evaluating what comes out after. white has: Re1->e3->g3,h3,f3 Nf3->g5 Qd1->h5,g4 Ba3->c1 Bd3->h7!! e5 - basically no knight on f6 a very bad position for black, at least there should be Be7. Maybe this is not practical to be taught to a program. If this is a 5 min. game, probably Bxh7 is not common. Dinan -----
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