Author: Oliver Roese
Date: 09:44:27 04/05/02
Go up one level in this thread
On April 05, 2002 at 12:17:28, John Merlino wrote: >On April 05, 2002 at 11:20:01, Oliver Roese wrote: > >>Hi! >> >>This position is from >>http://www.cs.ualberta.ca/~tony/RecentPapers/report.mac.pdf >>(see also http://www.talkchess.com/forums/1/message.html?221364) >> >>[D]5k1b/7P/2B1KP1P/8/8/p7/P7/8 w - - 0 1 >> >>The author writes: >>"After more than ten hours of play the position in [figure 9] was reached and >>since >>neither side was making progress the game was adjudicated after white's 111th >>move of Bc6-d5. " >>... >>"Even today I doubt if many programs can do any better." >> >>I tested this somewhat with crafty and can confirm it . >>Although this is a rather easy win for a human it is hard for an engine, >>since the winning plan distracts several heuristics. In order to win, white has >>to: >>1) playing f7(Be8), thereby giving more room for the enemy pieces. >>2) moving his king far away from the hotspot to the innocent looking pawn a3. >>3) trading the "dangerous" pawn h7 against blacks pawn a3. > >Chessmaster 9000 (pre-Beta version) completely solves it in 2:57 on a PIII-733 >(although it sees 7.h8=Q Bxh8 8.Kxa3 after 29 seconds): > >Time Depth Score Positions Moves >0:07 12/13 3.01 1138091 1.Bd5 Ke8 2.f7+ Kf8 3.Kd7 Bf6 4.Kc6 > Bh8 5.Kb5 Bc3 6.Ka4 Bb2 7.Kb4 Ke7 > 8.Kc5 Kf8 It finds that almost instantly, although it has difficulties to give away his "strong" pawn at h7. >0:10 13/14 3.19 1686021 1.Bd5 Ke8 2.f7+ Kf8 3.Kd7 Bf6 4.Kc6 > Bh8 5.Kb5 Bc3 6.Bc4 Bh8 7.Kb4 Bb2 > 8.Bb3 Ke7 >0:17 14/15 2.99 2840357 1.Bd5 Ke8 2.f7+ Kf8 3.Kd7 Bf6 4.Kc6 > Bh8 5.Kb5 Bc3 6.Bc4 Bh8 7.Kc6 Ke7 > 8.Kc5 Bf6 9.Kb4 >0:22 15/16 3.19 3749955 1.Bd5 Ke8 2.f7+ Kf8 3.Kd7 Bf6 4.Kc6 > Bh8 5.Kb5 Bc3 6.Bc4 Bh8 7.Kc6 Ke7 > 8.Kc5 Bc3 9.Be6 Be5 >0:29 16/17 3.17 5069003 1.Bd5 Ke8 2.f7+ Kf8 3.Kd7 Bf6 4.Kc6 > Bh8 5.Kb5 Bc3 6.Ka4 Bb2 7.h8=Q+ > Bxh8 8.Kxa3 Bf6 9.h7 Ke7 10.Kb4 > Be5 11.a4 Bh8 12.a5 >0:36 17/18 3.27 6335927 1.Bd5 Ke8 2.f7+ Kf8 3.Kd7 Bf6 4.Kc6 > Bh8 5.Kb5 Bc3 6.Ka4 Bb2 7.h8=Q+ > Bxh8 8.Kxa3 Bf6 9.h7 Be7+ 10.Kb3 > Kg7 11.Be4 Bd6 12.a4 Bc5 13.a5 >0:45 18/19 3.49 7840971 1.Bd5 Ke8 2.f7+ Kf8 3.Kd7 Bf6 4.Kc6 > Bh8 5.Kb5 Bc3 6.Ka4 Bb2 7.h8=Q+ > Bxh8 8.Kxa3 Bf6 9.Kb3 Be7 10.a4 > Bd6 11.a5 Bc5 12.a6 >0:59 19/20 3.53 9988197 1.Bd5 Ke8 2.f7+ Kf8 3.Kd7 Bf6 4.Kc6 > Bh8 5.Kb5 Bc3 6.Ka4 Bb2 7.h8=Q+ > Bxh8 8.Kxa3 Bf6 9.Kb3 Be7 10.a4 > Bd6 11.Kc4 Bb8 12.h7 Be5 13.a5 >1:18 20/21 3.86 12780749 1.Bd5 Ke8 2.f7+ Kf8 3.Kd7 Bf6 4.Kc6 > Bh8 5.Kb5 Bc3 6.Ka4 Bb2 7.h8=Q+ > Bxh8 8.Kxa3 Bf6 9.Kb3 Be7 10.a4 > Bd6 11.a5 Bc5 12.a6 Bd4 13.h7 Bh8 > 14.Kc4 >2:57 21/22 11.99 24100416 1.Bd5 Ke8 2.f7+ Kf8 3.Kd7 Bf6 4.Kc6 > Bh8 5.Kb5 Bc3 6.Ka4 Bb2 7.h8=Q+ > Bxh8 8.Kxa3 Bf6 9.Kb3 Be7 10.a4 > Bc5 11.a5 Bd6 12.h7 Kg7 13.h8=Q+ > Kxh8 14.a6 Kg7 15.a7 Kf6 16.a8=Q > >jm Strong point for chessmaster as an analysis-engine. Are other engines competitive? Oliver
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