Author: Bruce Moreland
Date: 22:37:23 03/05/00
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On March 05, 2000 at 23:16:54, Richard A. Fowell (fowell@netcom.com) wrote: >On March 05, 2000 at 18:25:04, Djordje Vidanovic wrote: > ><snip> >>Ernst, hello again. I used my PII-400 under Win 2000 and here's the Shredder 3 >>analysis (Shredder sees the light after about 12 seconds, that is the march >>towards the enemy King): ><snip> > >Will Bryant's freeware chess program, "Screamer" for the Macintosh, >( http://pweb.netcom.com/~wbryant/screamer.html ) >finds the king march in 4 seconds on my 180 MHz Macintosh, and >mates Black in 13 moves in selfplay at 5 seconds/move >(that would be 2.25 sec/move on a 400 MHz machine). > >Note White's moves 1-6: White Queen covers Black's Queening square, >then White's King charges straight for Black's King. > >I've included here both Screamer's self-play game, and its analysis >log when given a long time to examine the position. >Screamer sticks with the king march plan from 4 seconds on. The scores returned indicate that it doesn't know what it is accomplishing. This is the kind of problem where you'd like the program to understand that it is winning, from the root. bruce >================================================ >Screamer's selfplay game at 5 sec/move, 180 MHz: >================================================ > >Listing for the game and final position >Starting Position: k7/1b6/8/8/2Q5/8/6p1/6K1 w - - > >Move White Black >------------------------------------------------------ > 001 (c4c5) Qc5 (a8b8) Kb8 > 002 (g1f2) Kf2 (b8a8) Ka8 > 003 (f2g3) Kg3 (a8b8) Kb8 > 004 (g3f4) Kf4 (b7c6) Bc6 > 005 (c5b6) Qb6+ (c6b7) Bb7 > 006 (f4e5) Ke5 (g2g1) g1=N > 007 (b6g1) Qxg1 (b8c7) Kc7 > 008 (g1c5) Qc5+ (c7d7) Kd7 > 009 (c5d6) Qd6+ (d7c8) Kc8 > 010 (d6b6) Qb6 (c8b8) Kb8 > 011 (e5d6) Kd6 (b8a8) Ka8 > 012 (d6c7) Kc7 (b7d5) Bd5 > 013 (b6b8) Qb8++ > >8 k Q . . . . . . >7 . . K . . . . . >6 . . . . . . . . >5 . . . b . . . . >4 . . . . . . . . >3 . . . . . . . . >2 . . . . . . . . >1 . . . . . . . . > > a b c d e f g h > >=================================================================== >Screamer's deep analysis: >=================================================================== > >The Current Search Time: 86400 seconds >PLY NODES TIME SCORE PV >______________________________________________ > 3/00 1621 0:00 +4.25 Qb5 Kb8 Kf2 > 4/00 2407 0:00 +4.15 Qb5 Kb8 Qe5+ Kc8 Kf2 > 4/02 3300 0:00 +4.25 Qg8+ Ka7 Kf2 Kb6 Ke3 > 5/00 8410 0:00 +4.15 Qg8+ Ka7 Kf2 Kb6 Qb8 Ka6 > 5/03 13114 0:00 +4.25 Kf2 Kb8 Qg8+ Kc7 Qg7+ Kb6 Ke3 > 6/00 21707 0:00 +4.35 Kf2 Kb8 Qc5 Ba8 Qe5+ Ka7 Qe8 > 7/00 39944 0:01 +4.35 Kf2 Kb8 Qc5 Ka8 Qb6 Kb8 Ke2 > 8/00 128568 0:03 +4.25 Kf2 Ka7 Qb5 Ka8 Qc5 Kb8 Ke2 Be4 > 8/21 193316 0:04 +4.35 Qc5 Kb8 Kf2 Ka8 > 9/00 206948 0:04 +4.45 Qc5 Kb8 Kf2 Ka8 Kg3 Kb8 Kf4 Bd5 Ke5 >10/00 349266 0:07 +4.50 Qc5 Kb8 Kf2 Ka8 Kg3 Kb8 Kf4 Bd5 Ke5 Bc4 >11/00 4210761 1:24 +4.40 Qc5 Kb8 Kf2 Ba8 Qe5+ Ka7 Qd4+ Kb8 Qg7 Bc6 Ke3 >Kc8 Kd4 >12/00 5995486 1:58 +4.45 Qc5 Kb8 Kf2 Ba8 Qe5+ Ka7 Qd4+ Kb8 Qf4+ Ka7 >Qe3+ Kb8 Qg3+ Ka7 Ke3 Kb6 Kd4 >13/00 25408221 8:10 +4.40 Qc5 Kb8 Kf2 Ba8 Qe5+ Ka7 Qd4+ Kb8 Qf4+ Ka7 >Qe3+ Kb8 Qc1 Bd5 Qg5 Bc6 Ke3 >14/00 32830000 10:31 +4.40 Qc5 Kb8 Kf2 Ba8 Qe5+ Ka7 Qd4+ Kb8 Qf4+ Ka7 >Qe3+ Kb8 Qc1 Bd5 Ke3 Kb7 Kd4 Be6 >15/00 39724821 12:55 +4.45 Qc5 Kb8 Kf2 Ba8 Qb6+ Bb7 Kg3 Kc8 Kf4 Ba8 Ke5 >Bb7 Kd6 Kb8 Qc7+ Ka7 Qg7 >16/00 54837940 17:41 +4.45 Qc5 Kb8 Kf2 Ba8 Qb6+ Bb7 Kg3 Kc8 Kf4 Ba8 Ke5 >Bb7 Kd6 Kb8 Qc7+ Ka7 Qa5+ Kb8 Qb6
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