Author: Dann Corbit
Date: 02:32:24 01/26/01
Go up one level in this thread
On January 26, 2001 at 04:30:42, Dusan Dobes wrote: >On January 25, 2001 at 17:01:41, David Rasmussen wrote: > >>[D]1k1r1bnr/ppp1qbpp/3p2n1/3Pp3/N3Pp2/1QN2P2/PPP1BBPP/R2R2K1 w - - 0 1 >> >>I made this up a couple of minutes ago, at random. I was quite sure that there >>would something tactical in it for white. It turned out there was, starting with >>Nb5. But my program took 57 seconds to fail high the first time at depth 11, >>only to get a score of 0.85 at research. I wouldn't say that Chezzz understood >>what happened until depth 12, where it fails high with +1.18 and gets +2.06 at >>research. This took 570 seconds... >> >>I'm sure a lot of programs will see this within the first second or so... > >Phalanx XXII on an Athlon 900 changes its mind very often: > >1k1r1bnr/ppp1qbpp/3p2n1/3Pp3/N3Pp2/1QN2P2/PPP1BBPP/R2R2K1 w - - 0 1 > 6 232 56 80468 Nc3-b5 Pa7-a6 Nb5-c3 Kb8-c8 Qb3-b4 Ng8-f6 > 6 237 67 97072 Qb3-b4 ! > 6 274 84 123581 Qb3-b4 > 6 -> 0:01.05 157164 1 turn > 7 281 141 209011 Qb3-b4 Ng8-f6 Be2-a6 Pb7-b6 Nc3-b5 Qe7-d7 > Ra1-b1 > 7 -> 0:02.49 388887 0 turns > 8 268 380 587013 Qb3-b4 Ng8-f6 Be2-a6 Pb7-b6 Ra1-c1 Qe7-d7 > 8 271 543 822362 Nc3-b5 Pa7-a6 Nb5xc7 Kb8xc7 Bf2-b6 Kc7-c8 > Bb6xd8 Qe7xd8 Na4-b6 Kc8-b8 Ra1-c1 > 8 -> 0:08.02 1287747 1 turn > 9 286 1494 2407429 Nc3-b5 Pc7-c5 Pd5xc6 Pb7xc6 Bf2xa7 Qe7xa7 > Nb5xa7 Bf7xb3 Na7xc6 Kb8-c7 Nc6xd8 Bb3xa4 > 9 287 1956 3109290 Qb3-b4 Ng8-f6 Be2-a6 Pb7-b6 Qb4-c4 Pc7-c5 > 9 -> 0:25.79 4222814 1 turn > 10 292 6687 10655249 Qb3-b4 Pb7-b6 Nc3-b5 > 10 -> 1:23.20 13359994 0 turns > 11 322 15957 25142993 Qb3-b4 Bf7-e8 Qb4-a5 > 11 -> 3:45.56 36424241 0 turns > 12 320 40132 63072776 Qb3-b4 Pb7-b6 Nc3-b5 Pa7-a5 Qb4-c4 Ng8-f6 > 12 321 52299 81740930 Nc3-b5 Pc7-c5 Pd5xc6 Pb7xc6 Bf2xa7 Qe7xa7 > Nb5xa7 Bf7xb3 Na7xc6 Kb8-c7 Nc6xd8 Bb3xa4 > Nd8-f7 Ba4xc2 > 12 326 61503 95833738 Qb3-b5 ! > 12 334 71450 111866592 Qb3-b5 Bf7-e8 Qb5-a5 > 12 -> 14:12.98 135185425 2 turns > 13 326 104646 167016230 Qb3-b5 Bf7-e8 Qb5-a5 Pb7-b6 Qa5-a6 Rd8-c8 > Be2-b5 Be8xb5 Nc3xb5 Pc7-c5 Ra1-c1 Qe7-b7 > Qa6xb7 Kb8xb7 > 13 331 121998 193651775 Nc3-b5 ! > 13 367 150596 239231519 Nc3-b5 Pc7-c5 Pd5xc6 Pb7xc6 Bf2xa7 Qe7xa7 > Nb5xa7 Bf7xb3 Na7xc6 Kb8-c7 Nc6xd8 Bb3xa4 > Nd8-f7 Bf8-e7 Rd1-d2 Ba4-c6 > 13 -> 40:51.82 395643256 1 turn > 14 367 325592 520982959 Nc3-b5 Pc7-c5 Pd5xc6 Pb7xc6 Bf2xa7 Qe7xa7 > Nb5xa7 Bf7xb3 Na7xc6 Kb8-c7 Nc6xd8 Bb3xa4 > Nd8-f7 Bf8-e7 Rd1-d2 Ba4-c6 Nf7xh8 Ng6xh8 > 14 372 430619 680411736 Qb3-b4 ! > 14 378 527583 828671791 Qb3-b4 Pb7-b6 Nc3-b5 Pa7-a5 Qb4-b3 Rd8-c8 > Nb5xc7 Rc8xc7 Bf2xb6 Rc7-b7 Be2-a6 Bf7-e8 > Ba6xb7 Qe7xb7 Bb6xa5 Qb7xb3 Pc2xb3 Bf8-e7 > 14 -> 127:57.36 1216788007 1 turn Considering the high scores for many alternatives at high depths, it seems very doubtful that there is a single winning move.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.