Author: Vincent Diepeveen
Date: 11:56:34 05/18/05
Go up one level in this thread
On May 18, 2005 at 11:52:22, Jeremiah Penery wrote: >On May 18, 2005 at 04:51:41, Renze Steenhuisen wrote: > >>On May 18, 2005 at 03:24:42, Jeremiah Penery wrote: >> >>>On May 17, 2005 at 22:31:25, Eelco de Groot wrote: >>> >>>>Pro Deo 1.1 Q5T about Nolot #3, keymove is supposed to be Nxg5, most programs >>>>eventually play Bxg5. So does the Q5T, but only with +0.36 >>>>[D]r2qk2r/ppp1b1pp/2n1p3/3pP1n1/3P2b1/2PB1NN1/PP4PP/R1BQK2R w KQkq - bm Nxg5; >I've studied the Nolot positions a lot, and I'm quite sure that position #3 is >>>correct with Nxg5. White has a crushing attack, and most of black's pieces are >>>paralyzed. >>> >>>This is output from a modified Crafty 19.19, with some form of singular >>>extensions among other things: >>> >>>White(1): analyze >>>Analyze Mode: type "exit" to terminate. >>> clearing hash tables >>> time surplus 0.00 time limit 22.50 (3:30) >>> depth time score variation (1) >>> ... >>> 13-> 2:32 0.70 1. Nxg5 Bxd1(S) 2. Nxe6 Qc8(S) 3. Nxg7+ >>> Kf7(S) 4. O-O+ Kxg7(S) 5. Nf5+ Qxf5 >>> 6. Bxf5 Bh5 7. b4 Bg6 8. Bg4 <HT> >>> >>>The score continues to rise at higher iterations. >>> >>> 17-> 27:17 1.24 1. Nxg5 Bxd1 2. Nxe6 Qb8(S) 3. Nxg7+ >>> Kf7 4. N7f5 Ba4 5. O-O Ke8 6. b3(S) >>> Bxb3 7. axb3 <HT> >> >> >>Are we talkin about the same position here? This is my log I get for Crafty 19.3 >>on a PIV 3 GHz and 768 MByte Hashtable: >> >>solution 1. Nxg5 >> time surplus 0.00 time limit 1200:00 (1200:00) >> depth time score variation (1) > ... >> 18 548:47 0.15 1. Qe2 g6 2. h4 Nf7 3. h5 Bh4 4. Qf2 >> Bxg3 5. Qxg3 gxh5 6. Bf4 Kd7 7. Kd2 >> h6 8. Nh2 Rg8 9. Nxg4 Rxg4 10. Qf2 >> Qg8 >> 18-> 935:27 0.15 1. Qe2 g6 2. h4 Nf7 3. h5 Bh4 4. Qf2 >> Bxg3 5. Qxg3 gxh5 6. Bf4 Kd7 7. Kd2 >> h6 8. Nh2 Rg8 9. Nxg4 Rxg4 10. Qf2 >> Qg8 >> time=1200:00 cpu=99% mat=0 n=72758561382 fh=91% nps=1010k >> ext-> chk=2131479195 cap=206017646 pp=19671222 1rep=98479684 >>mate=3505586 >> predicted=0 nodes=72758561382 evals=1817035425 >> endgame tablebase-> probes=0 hits=0 >> >>Can anyone tell me what the big change was to Crafty from 19.3 to 19.19 that >>causes this difference? > >Nothing. The changes that caused my version to find this move were changes that >I made. IMO, Crafty sucks at finding any kind of king attack, so I helped it >out a bit. Like : queen = queen - 2.00 pawns :) very big smile here :) >I won't claim that it's great or anything - in fact, it's very often >wrong - but in this position it is not wrong.
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