Author: Pete Galati
Date: 12:30:36 01/03/01
Go up one level in this thread
On January 03, 2001 at 13:46:41, Pete Galati wrote: >On January 03, 2001 at 04:04:30, Uri Blass wrote: > >>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. [....] >> >>CometB27(64 mbytes hash under chessbase) had a fail low without solving it. >>It is a bad point to stop it. >>If you give Comet more time it is going to solve the fail low and see a negative >>score for Bxh7+ and it is going to change its mind to Qd2 >> >>Comet can find Bh7 again at depth 10 and it fail high again and again to get >>+1.61 score after 4:47 on pIII800. >> >>It fails high again at depth 11 and it can see +1.97 score after 6:15 and +1.99 >>at depth 12 after 9:11. >>It fails high again at depth 13 with score of +2.12 after 13:38 >> >>I agree that the position is not very hard but your result for Comet is too >>optimistic because you stopped it before it had an opportunity to see the >>tactical reason. >> >>The times are not exactly correct and may be slightly smaller because the p800 >>did another task(this post) >> >>Uri > >Ok, if I remember to do it, I'll reboot into Dos and let Comet run with this >position for an hour or two, see what it thinks then. > >Pete Ok, not that this is a reasonable length of time for Cpmet to think about this, but Comet now run from ME's Dos, which now gave it approx 60mb hashtables, I let it run for approx 1 hour and 20 minutes, here's the results. Just like you said, it looked at Qd2 for a while around depth 9. Pete Comet-B.27 Wed Jan 3 12:55:07 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 4 766414 d1d2 f8e8 a3c5 d7c5 d4c5 c7a5 e1b1 7. +0.13 7 1067950 d1d2 f8c8 e1b1 e7g6 a3c5 d7c5 d3g6 7. +0.13 11 1694460 d1d2 f8c8 e1b1 e7g6 a3c5 d7c5 d3g6 8. +0.04 23 3131477 d1d2 f8e8 e1b1 b7a8 d2g5 b8b1 a1b1 8! +0.26 73 11291621 d3h7 g8h7 f3g5 h7h6 d1g4 e7g6 g5e6 8! +0.53 74 11626173 d3h7 g8h7 f3g5 h7h6 d1g4 c5d4 a3e7 8. +0.56 76 12061079 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 a3c1 8. +0.56 76 12088281 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 a3c1 9? +0.42 77 12542751 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4f5 9? +0.15 102 17642091 d3h7 g8h7 d4c5 9? -0.12 154 25983659 d3h7 g8h7 d4c5 9. +0.14 188 30209279 d1d2 h7h6 d2f4 c7a5 d4c5 d7c5 a3b4 9. +0.14 201 32351345 d1d2 h7h6 d2f4 c7a5 d4c5 d7c5 a3b4 10. +0.09 244 37775643 d1d2 h7h6 d4c5 d7c5 a3c5 c7c5 a1a4 10! +0.27 268 42603683 d3h7 g8h7 f3g5 h7g6 a3c5 d7c5 d1g4 10! +0.54 280 45232202 d3h7 g8h7 f3g5 h7h6 d1g4 c5d4 a3e7 10! +0.81 294 48264401 d3h7 g8h7 f3g5 h7h6 d1g4 c5d4 a3e7 10! +1.08 311 52289875 d3h7 g8h7 f3g5 h7h6 d1g4 c5d4 a3e7 10! +1.35 335 58285894 d3h7 g8h7 f3g5 h7h6 d1g4 c5d4 a3e7 10. +1.61 349 61509841 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4g3 10. +1.61 354 62586980 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4g3 11! +1.74 406 76282183 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4g3 11. +1.98 453 87555011 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4g3 11. +1.98 480 93963060 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4g3 12. +1.99 626 144196106 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4g3 12. +1.99 737 178861765 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4g3 13! +2.12 969 241916599 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4g3 13! +2.39 1256 305331128 d3h7 g8h7 f3g5 h7g6 d1g4 c5d4 a3e7 13? +2.39 1334 335165279 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4g3 13. +2.39 1725 461035736 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4g3 14! +2.52 2305 635182679 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4g3 14? +2.52 4780 1557852759 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4g3 14. +2.52 4783 1558715376 d3h7 g8h7 f3g5 h7g6 d1g4 f7f5 g4g3 ==> My Move: d3h7 in 79:59
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