Author: Uri Blass
Date: 22:10:21 03/03/06
Go up one level in this thread
On March 04, 2006 at 00:50:36, Stuart Cracraft wrote: >On March 03, 2006 at 22:39:47, Lar Mader wrote: > >>Ok, I know this topic has been discussed a lot (beaten to death?!), but I am >>still curious about this move: >> >>Game 2, IBM Kasparov vs. Deep Blue Rematch >>Deep Blue played >> 36.axb5 >> >>I know that the move 37.Be4 is a move that is found by some current chess >>engines. >> >>But this 36.axb5, to my knowledge, is never selected by current chess engines. >> > >Nothing for me but that doesn't say much considering my own program: > >.sd 99 >maxdepth = 99 maxtime = 9999999 timed = 0 >.ts >position file? [wac.epd] tests.epd ># of test positions to test? 1 >maxtime = 9999999 >Interrupt current ply and return move at timeout >Testsuite: Tests/tests.epd 1 positions >*** Problem Solution(s): axb5 (bm) >BR ** BR ** BQ ** BK ** >** -- ** -- ** -- BP -- >BP ** -- BB -- BP -- BP >** BP ** WP BP WP ** -- >WP WP BP ** -- ** -- ** >** -- WP -- ** -- ** WP >WR ** WB ** -- WQ WP ** >WR -- ** -- ** -- WK -- >mv 1 stage 0, white to move, computer plays white >hash=13ae1dd545f1642d >pawnhash=38fa81d61563fda8 >0 0 0 0 0 0 >Alpha=1457 Beta=2258 Maxdepth=99 MaxTime=9999999 xboard=0 >Itr/Max Mv Score Time Nodes PV > 1/ 4< a4b5 1457 0.00 37 a4b5 > 1/ 4 g1h2 288 0.01 82 g1h2 > 2/ 6> g1h2 688 0.02 269 g1h2 e5e4 g2g3 > 2/ 7 a4b5 689 0.02 388 a4b5 a6b5 a2a7 > 3/ 9 a4b5 698 0.05 1010 a4b5 a6b5 a2a7 e8f8 > 4/10 f2b6 349 0.10 2932 f2b6 d6c7 b6f2 > 5/13 f2b6 629 0.25 8081 f2b6 d6c7 b6e6 e8e6 f5e6 b5a4 a2a4 c7b6 g1h2 > 6/14 f2b6 720 0.54 18844 f2b6 d6c7 b6e6 e8e6 f5e6 c8d8 a4b5 > 7/16 f2b6 848 1.74 60879 f2b6 d6b8 b6e6 e8e6 f5e6 b8a7 g1h2 c8f8 a4b5 > 8/19 f2b6 1001 3.19 115760 f2b6 d6c7 b6e6 e8e6 f5e6 c7b6 g1h2 c8e8 a4b5 >a6b5 a2a8 > 9/21 f2b6 1175 8.05 308035 f2b6 e8e7 a4b5 c8b8 b6c6 b8c8 g1h2 c8e8 >10/21 f2b6 1125 16.45 639593 f2b6 d6c7 b6b7 e8d8 a4b5 c8b8 b7c6 b8b5 a2a6 >a8a6 a1a6 b5d5 c6c4 >11/23 f2b6 1415 37.50 1488255 f2b6 d6c7 b6e6 e8e6 f5e6 a8b8 a4b5 a6b5 c2g6 >c7d6 a2a7 >12/27 f2b6 1450 91.88 3725097 f2b6 e8f8 a4b5 c8b8 b6a5 d6c5 b4c5 f8c5 g1h2 >b8b5 a5a4 c5d5 a1d1 >13/33 f2b6 1499 208.56 8436384 f2b6 d6c7 b6e6 e8e6 f5e6 a8b8 >14/ > >People have consistently underestimated Deep Bluer's evaluation function. > >Bob Hyatt can speak more to your concerns than any other person on this >forum. > >Stuart I think that Qb6 is the right move and deeper blue's move was not correct. Evaluation function is a lot about having the right parameters and not only about knowledge and it is known that the deep blue team had not enough time to tune their evaluation function so I see no reason to assume that deep blue's evaluation was better than the evaluation function of the programs of today. Uri
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