Author: Anthony Cozzie
Date: 09:00:47 01/12/04
Go up one level in this thread
On January 12, 2004 at 09:40:30, Robert Hyatt wrote: >On January 12, 2004 at 07:59:23, Anthony Cozzie wrote: > >>On January 12, 2004 at 05:37:48, Tord Romstad wrote: >> >>>On January 11, 2004 at 21:48:50, Anthony Cozzie wrote: >>> >>>>The position is Topalov-Bareev from one of the rapid playoffs. >>> >>>FEN, please? >>> >>>Tord >> >>[D]r6r/k4pp1/pq2p2p/1p1n4/3N3P/1R6/PPP1QPP1/2KR4 w - - 25 >> >>One of the reasons I like this position is that Crafty needs some minutes to >>come up with the solution. Gothmog should have no trouble: this position is >>very sensitive to checks in qsearch. If you do recapture extensions you will >>find it even earlier. . . . >> >>anthony > >What hardware are you using with Crafty? IE here is my dual xeon: > > 10 19.00 1.02 1. Qe5 g6 2. Rf3 Rh7 3. Qe4 Qb7 4. > Qd3 Rd8 5. h5 Nb4 (s=3) > 10 22.15 1.09 1. Qf3 Qc7 2. Rxb5 Rac8 3. Qa3 Nf4 > 4. Ra5 Ne2+ 5. Kb1 Nxd4 6. Rxa6+ Kb8 > 7. Rxd4 Qxc2+ > 10 29.55 ++ 1. Nxb5+!! > 10 31.26 2.13 1. Nxb5+ axb5 2. Rxb5 Qc6 3. Rdxd5 > exd5 4. Qd3 Rab8 5. Qa3+ Qa6 6. Qc5+ > Rb6 7. Ra5 Rb8 8. Rxa6+ Kxa6 > 10-> 31.56 2.13 1. Nxb5+ axb5 2. Rxb5 Qc6 3. Rdxd5 > exd5 4. Qd3 Rab8 5. Qa3+ Qa6 6. Qc5+ > Rb6 7. Ra5 Rb8 8. Rxa6+ Kxa6 (s=7) > 11 32.56 ++ 1. Nxb5+!! > 11 34.53 3.44 1. Nxb5+ axb5 2. Rxb5 Qc6 3. Rdxd5 > exd5 4. Qe7+ Ka6 5. Rb3 Qb6 6. Rxb6+ > Kxb6 7. Qd6+ Ka7 8. Qxd5 (s=6) > 11-> 35.51 3.44 1. Nxb5+ axb5 2. Rxb5 Qc6 3. Rdxd5 > exd5 4. Qe7+ Ka6 5. Rb3 Qb6 6. Rxb6+ > 12 53.07 3.96 1. Nxb5+ axb5 2. >Rxb5 Rhc8 3. Rxb6 > Kxb6 4. Qg4 g6 5. a4 Rc6 6. Qe4 Rd8 > 7. b4 > 12-> 55.11 3.96 1. Nxb5+ axb5 2. Rxb5 Rhc8 3. Rxb6 > Kxb6 4. Qg4 g6 5. a4 Rc6 6. Qe4 Rd8 > 7. b4 > 13 1:06 4.03 1. Nxb5+ axb5 2. Rxb5 Rhc8 3. Rxb6 > Kxb6 4. Qf3 f6 5. Qb3+ Kc5 6. c4 Nc7 > 7. a4 Rd8 8. Qb7 > 13-> 1:11 4.03 1. Nxb5+ axb5 2. Rxb5 Rhc8 3. Rxb6 > Kxb6 4. Qf3 f6 5. Qb3+ Kc5 6. c4 Nc7 > 7. a4 Rd8 8. Qb7 > time=1:37 cpu=372% mat=0 n=220406650 fh=92% nps=2.25M > ext-> chk=11285743 cap=476467 pp=18175 1rep=733573 mate=40209 > predicted=0 nodes=220406650 evals=56173816 > endgame tablebase-> probes=0 hits=0 > SMP-> split=10562 stop=1411 data=17/64 cpu=6:04 elap=1:37 > > >That isn't "some minutes". :) On my Athlon 1.5, Crafty needs somewhat over a minute. This is also a relatively unoptimized Crafty binary. At one point Zappa got this in 2 seconds at depth 6, but I've been taking out extensions in an effort to get more brute-force depth. I think one of the biggest amateur mistakes is concentrating too much on test positions and not enough on how the program plays. anthony
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