Author: Robert Hyatt
Date: 15:21:11 11/21/03
Go up one level in this thread
On November 21, 2003 at 17:20:37, Uri Blass wrote: >On November 21, 2003 at 17:18:46, Dann Corbit wrote: > >>On November 21, 2003 at 17:13:49, ALI MIRAFZALI wrote: >> >>>In the following interesting position it takes over 19 hours for Chessmaster >>>9000 (default)on my 1.8 gig computer to avoid 15..hxg5 and choose 15..Rac8. >>>It is my guess that Fritz and Junior will not solve this. >>>[D]r2r2k1/ppq1bpp1/2bppn1p/6B1/3NPP1P/2N5/PPPQ2P1/1K1RR3 b >>>Analysis by Chessmaster 9000(default Personality): >>>Time Depth Score Positions Moves >>>0:02 1/9 -1.38 356913 15...hxg5 16.hxg5 Ne8 17.g6 Bf6 >>> 18.Ncb5 Qd7 19.Nxc6 bxc6 20.gxf7+ >>> Qxf7 >>>0:07 1/10 -1.23 1021400 15...hxg5 16.hxg5 Nd7 17.g6 Nc5 >>> 18.gxf7+ Kxf7 19.f5 e5 20.Nxc6 >>> bxc6 21.Qe2 >>>0:28 2/11 -1.13 3883272 15...hxg5 16.hxg5 Nh7 17.g6 Nf6 >>> 18.gxf7+ Kxf7 19.f5 exf5 20.exf5 >>> Kg8 21.Qe2 Re8 >>>1:03 3/12 -1.08 9118689 15...hxg5 16.hxg5 Ne8 17.Qe3 g6 >>> 18.Qh3 Bf8 19.f5 exf5 20.exf5 Bg7 >>> 21.Nxc6 bxc6 22.fxg6 fxg6 >>>2:53 4/13 -0.81 26353616 15...hxg5 16.hxg5 Ne8 17.Rh1 g6 >>> 18.Qd3 Bf8 19.f5 exf5 20.exf5 Bg7 >>> 21.fxg6 Bxg2 22.Rh7 >>>9:47 5/14 -0.59 96074807 15...hxg5 16.hxg5 Ne8 17.Rh1 g6 >>> 18.f5 exf5 19.exf5 Qa5 20.Nxc6 >>> bxc6 21.fxg6 fxg6 22.Qd4 Ng7 23.Qc4+ >>> d5 24.Qxc6 >>>41:24 6/15 -0.19 431783244 15...hxg5 16.hxg5 Ne8 17.Rh1 g6 >>> 18.f5 exf5 19.exf5 Qa5 20.Nxc6 >>> bxc6 21.Qd4 Qe5 22.Qh4 Kf8 23.f6 >>> Bxf6 24.gxf6 Nxf6 >>>9:17:20 7/16 0.20 1564966390 15...hxg5 16.hxg5 Nxe4 17.Nxe4 >>> Bxe4 18.Rxe4 d5 19.Ree1 g6 20.g4 >>> Rac8 21.Rh1 Bf8 22.f5 Re8 23.fxg6 >>> fxg6 24.Qd3 Qg7 25.Qe3 >>>19:06:13 7/16 -0.29 3080132679 15...Rac8 16.g4 Nxg4 17.Rg1 h5 >>> 18.Rdf1 Bxg5 19.hxg5 e5 20.Nxc6 >>> bxc6 21.Rh1 exf4 22.Qxf4 Ne5 23.Rxh5 >>> Qa5 >>>Please indicate your result. >> >> >>950 MHz Athlon: >> >>E:\crafty>Crafty-Smp-1905.exe >> >>Initializing multiple threads. >>System is SMP, not NUMA. >>EPD Kit revision date: 1996.04.21 >>unable to open book file [./book.bin]. >>book is disabled >>unable to open book file [./books.bin]. >>hash table memory = 192M bytes. >>pawn hash table memory = 12M bytes. >>EGTB cache memory = 64M bytes. >>draw score set to 0.00 pawns. >>book file enabled. >>choose from book moves randomly (using weights.) >>choose from 5 best moves. >>book learning enabled >>result learning enabled >>position learning enabled >>threshold set to 9 pawns. >>0 piece tablebase files found >>EGTB access enabled >>using tbpath=e:\crafty\release\tb >>0 piece tablebase files found >> >>Crafty v19.5 (1 cpus) >> >>White(1): hash 256M >>hash table memory = 192M bytes. >>White(1): epdpfga \rac8.epd rac8.out >>PFGA: EPD record: 1 >>middle-game phase >> trojan check enabled >> clearing hash tables >> time surplus 0.00 time limit 22.50 (3:30) >> depth time score variation (1) >> 5 0.33 0.28 1. ... d5 2. e5 Ne4 3. Nxe4 dxe4 4. >> Bxe7 Qxe7 5. Nxc6 bxc6 >> 5-> 0.40 0.28 1. ... d5 2. e5 Ne4 3. Nxe4 dxe4 4. >> Bxe7 Qxe7 5. Nxc6 bxc6 >> 6 0.81 0.52 1. ... d5 2. exd5 Nxd5 3. Nxc6 bxc6 >> 4. Bxe7 Qxe7 5. h5 Nxc3+ 6. Qxc3 Rxd1+ >> 7. Rxd1 >> 6 0.98 0.25 1. ... Rac8 2. f5 e5 3. Nxc6 Qxc6 4. >> g4 Qc4 >> 6-> 1.28 0.25 1. ... Rac8 2. f5 e5 3. Nxc6 Qxc6 4. >> g4 Qc4 >> 7 1.54 0.37 1. ... Rac8 2. f5 e5 3. Nxc6 Qxc6 4. >> Qf2 Qc5 5. Qg3 >> 7-> 2.66 0.37 1. ... Rac8 2. f5 e5 3. Nxc6 Qxc6 4. >> Qf2 Qc5 5. Qg3 >> 8 3.58 0.31 1. ... Rac8 2. f5 e5 3. Nxc6 Qxc6 4. >> Qf2 a6 5. Qg3 b5 >> 8-> 5.83 0.31 1. ... Rac8 2. f5 e5 3. Nxc6 Qxc6 4. >> Qf2 a6 5. Qg3 b5 >> 9 8.28 0.43 1. ... Rac8 2. f5 e5 3. Nxc6 bxc6 4. >> Qf2 Qb7 5. Qg3 Rb8 6. b3 >> 9 18.95 0.42 1. ... d5 2. e5 Ne4 3. Nxe4 dxe4 4. >> Qe2 Bxg5 5. hxg5 Rac8 6. g6 Bd5 7. >> gxf7+ Kxf7 >> time=22.52 cpu=96% mat=0 n=9918544 fh=86% nps=440k >> ext-> chk=45535 cap=33588 pp=2724 1rep=3909 mate=40 >> predicted=0 nodes=9918544 evals=3742770 >> endgame tablebase-> probes=0 hits=0 >> SMP-> split=0 stop=0 data=0/4096 cpu=21.67 elap=22.52 > >It is known that Crafty does not take in g5 even in case that it is a good idea. >It is not because of seeing the tactic. > >Uri However, with queens on, one side castled, the other not, taking is bad more often than not, unless in taking you can also force the exchange of rooks or the queens, which makes it ok. I'd _much_ rather not take than take, as that is most often not going to lose, while taking when it is wrong will always lose.
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