Author: Uri Blass
Date: 10:26:41 12/30/02
Go up one level in this thread
On December 30, 2002 at 10:55:55, Lieven Clarisse wrote: >On December 30, 2002 at 10:50:12, Heiner Marxen wrote: > >>On December 29, 2002 at 14:36:05, Heiner Marxen wrote: >> >>>On December 28, 2002 at 11:04:05, Dieter Buerssner wrote: >>> >>>>On December 27, 2002 at 18:12:09, Heiner Marxen wrote: >>>> >>>>>On December 27, 2002 at 17:48:52, David Rasmussen wrote: >>>>> >>>>>>b2r2kr/p1pqb1p1/1p5p/4p3/2P1N1P1/1P2Q3/P3P2P/4KRR1 b - - 0 1 >>>>>You mean, black mates white? >>>>>According to Chest not within 8 moves. >>>>>I've started another run with depth=10. We'll see. >>>>> >>>>>If you have some line you think to be the best, I could try to prove >>>>>from there. >>>> >>>>Perhaps Chest can prove a mate after >>>> >>>>1...Bh4+ 2. Rg3 Qd1+ 3. Kf2 Rf8+ 4. Qf3 Qd4+ 5. Kg2 >>>> >>>>(After 5. Ke1 it is mate in 10 or faster, so this should also be possible?) >>> >>>[D]b4rkr/p1p3p1/1p5p/4p3/2PqN1Pb/1P3QR1/P3P1KP/5R2 b - - >>>I've started depth 10 from there. >>>Will need 2 hours or more (hard to guess, EBF appears to be unstable). >>> >>>Cheers, >>>Heiner >> >>After 16.2 hours (Athlon 1500+, 128 MB hash) Chest announces "mate in 10" >>here, with Bxe4 as unique solution key. >>I'm still waiting for PV and solution tree... the hash has been overrun >>severely. >> >>Cheers, >>Heiner > > >Thx for posting, what is white answer after bxe4? > >regards, > >lieven. White has no good answer The threat of black is h5 with mate in 9 and white has no defence that does not allow another mate in at most 9 moves. I expect pv that begins with h5 a3 but it is hard to know because I believe that there are more than one move that does not allow black to give mate in 8 moves. New position [D]5rkr/p1p3p1/1p5p/4p3/2Pqb1Pb/1P3QR1/P3P1KP/5R2 b - - 0 1 Analysis by Yace 0.99.56: 1...Be4xf3+ 2.Rg3xf3 Qd4xg4+ 3.Kg2-h1 Rf8xf3 4.Rf1xf3 -+ (-13.92) Depth: 1 00:00:00 1...Bh4xg3 2.Kg2xg3 Be4xf3 3.e2xf3 h6-h5 4.g4xh5 Qd4-f4+ 5.Kg3-g2 Rh8xh5 -+ (-15.67) Depth: 5 00:00:00 1...Bh4xg3 2.Kg2xg3 Be4xf3 3.e2xf3 h6-h5 4.g4xh5 Qd4-f4+ 5.Kg3-g2 Rh8xh5 -+ (-15.67) Depth: 5 00:00:00 1...Bh4xg3 2.Kg2xg3 Be4xf3 3.e2xf3 h6-h5 4.g4xh5 Qd4-f4+ 5.Kg3-g2 Rh8xh5 -+ (-15.67) Depth: 5 00:00:00 1...Bh4xg3 2.Kg2xg3 Be4xf3 3.e2xf3 h6-h5 4.g4xh5 Qd4-f4+ 5.Kg3-g2 Rh8xh5 -+ (-15.67) Depth: 5 00:00:00 1...Bh4xg3 2.Kg2xg3 Be4xf3 3.e2xf3 h6-h5 4.g4xh5 Qd4-f4+ 5.Kg3-g2 Rh8xh5 -+ (-15.67) Depth: 5 00:00:00 1...Bh4xg3 2.Kg2xg3 Be4xf3 3.e2xf3 h6-h5 4.g4xh5 Qd4-f4+ 5.Kg3-g2 Rh8xh5 -+ (-15.67) Depth: 5 00:00:00 1...Bh4xg3 2.Kg2xg3 Be4xf3 3.e2xf3 h6-h5 4.g4xh5 Qd4-f4+ 5.Kg3-g2 Rh8xh5 -+ (-15.67) Depth: 5 00:00:00 11kN 1...Bh4xg3 2.h2xg3 Be4xf3+ 3.e2xf3 e5-e4 4.f3-f4 Kg8-h7 5.Rf1-h1 -+ (-15.67) Depth: 6 00:00:00 37kN 1...Bh4xg3 2.h2xg3 Be4xf3+ 3.e2xf3 e5-e4 4.f3-f4 Kg8-h7 5.f4-f5 e4-e3 -+ (-15.91) Depth: 7 00:00:00 91kN 1...Bh4xg3 2.h2xg3 Be4xf3+ 3.e2xf3 e5-e4 4.f3-f4 Kg8-h7 5.f4-f5 e4-e3 6.Kg2-f3 -+ (-15.86) Depth: 8 00:00:00 254kN 1...Bh4xg3 2.h2xg3 Be4xf3+ 3.e2xf3 e5-e4 4.f3-f4 Qd4-d2+ 5.Kg2-h3 Qd2xa2 6.Rf1-c1 -+ (-16.26) Depth: 9 00:00:01 547kN 1...Bh4xg3 2.h2xg3 Be4xf3+ 3.e2xf3 e5-e4 4.f3-f4 Qd4-d2+ 5.Kg2-h3 Qd2xa2 6.Rf1-e1 Kg8-h7 -+ (-16.44) Depth: 9 00:00:01 547kN 1...Bh4xg3 2.h2xg3 Be4xf3+ 3.e2xf3 e5-e4 4.f3-f4 Qd4-d2+ 5.Kg2-h3 e4-e3 6.g4-g5 h6xg5+ 7.Kh3-g4 g5xf4 8.Rf1xf4 -+ (-16.84) Depth: 10 00:00:03 1292kN 1...Bh4xg3 2.Kg2xg3 Be4xf3 3.e2xf3 h6-h5 4.g4-g5 Qd4-d2 5.h2-h4 Qd2xa2 6.b3-b4 Qa2xc4 7.Rf1-b1 -+ (-17.16) Depth: 10 00:00:04 1713kN 1...Bh4xg3 2.h2xg3 Be4xf3+ 3.e2xf3 e5-e4 4.f3-f4 Qd4-d2+ 5.Kg2-h3 Qd2-e2 6.Rf1-c1 Rh8-h7 -+ (-16.76) Depth: 11 00:00:08 3602kN 1...Bh4xg3 2.h2xg3 Be4xf3+ 3.e2xf3 e5-e4 4.f3-f4 Qd4-d2+ 5.Kg2-h3 Qd2xa2 6.Rf1-e1 Qa2xb3 7.Re1xe4 Kg8-h7 -+ (-16.55) Depth: 11 00:00:09 4043kN 1...Be4xf3+ 2.Rg3xf3 Rf8xf3 3.e2xf3 Qd4-d2+ 4.Kg2-g1 Bh4-g5 5.f3-f4 Bg5xf4 6.Rf1xf4 e5xf4 7.a2-a4 -+ (-16.56) Depth: 11 00:00:12 5183kN 1...Be4xf3+ 2.e2xf3 Bh4xg3 3.h2xg3 e5-e4 4.f3-f4 Qd4-d2+ 5.Kg2-h3 Qd2xa2 6.b3-b4 Qa2xc4 7.Rf1-a1 a7-a6 8.Ra1-b1 -+ (-17.48) Depth: 11 00:00:21 8228kN 1...Be4xf3+ 2.Rg3xf3 Rf8xf3 3.e2xf3 Qd4-d2+ 4.Kg2-g1 Bh4-g5 5.f3-f4 Bg5xf4 6.Rf1-f3 Qd2-e2 7.Rf3xf4 e5xf4 8.a2-a3 Qe2-e3+ 9.Kg1-f1 -+ (-17.59) Depth: 12 00:00:39 16067kN 1...Bh4xg3 2.h2xg3 Be4xf3+ 3.Rf1xf3 Rf8xf3 4.e2xf3 Qd4-d2+ 5.Kg2-h1 Qd2xa2 6.b3-b4 Qa2-b3 7.Kh1-g2 Qb3xb4 8.Kg2-f2 Qb4xc4 9.g4-g5 -+ (-17.60) Depth: 12 00:00:41 16471kN 1...Bh4xg3 2.h2xg3 Be4xf3+ 3.Rf1xf3 Rf8xf3 4.e2xf3 Qd4-d2+ 5.Kg2-g1 Qd2xa2 6.f3-f4 Qa2xb3 7.f4xe5 Qb3xg3+ 8.Kg1-h1 -+ (-17.88) Depth: 12 00:00:42 16823kN 1...Bh4xg3 2.h2xg3 Be4xf3+ 3.e2xf3 e5-e4 4.f3-f4 Qd4-d2+ 5.Kg2-h1 e4-e3 -+ (-17.88) Depth: 12 00:00:44 17729kN 1...Bh4xg3 2.h2xg3 Be4xf3+ 3.e2xf3 e5-e4 4.f3-f4 Qd4-d2+ 5.Kg2-h1 e4-e3 6.Kh1-g1 e3-e2 7.g4-g5 e2-e1Q 8.g5xh6 -+ (-18.28) Depth: 13 00:01:00 24850kN 1...Bh4xg3 2.h2xg3 g7-g5 3.Rf1-f2 h6-h5 4.g4xh5 g5-g4 5.b3-b4 g4xf3+ 6.e2xf3 Be4xf3+ 7.Kg2-g1 Bf3xh5 8.Kg1-g2 -+ (-19.28) Depth: 13 00:02:21 56181kN 1...Bh4xg3 2.h2xg3 g7-g5 3.Kg2-h2 Be4xf3 4.e2xf3 h6-h5 5.g4xh5 Qd4-d2+ 6.Kh2-h3 Qd2-e2 7.Kh3-g4 Qe2xf1 8.Kg4xg5 Qf1xf3 -+ (-19.51) Depth: 13 00:02:29 58863kN 1...Bh4xg3 2.h2xg3 g7-g5 3.Rf1-f2 h6-h5 4.g4xh5 Rf8xf3 5.e2xf3 -+ (-19.90) Depth: 14 00:06:02 145522kN 1...Be4xf3+ 2.Rg3xf3 Rf8xf3 3.e2xf3 h6-h5 4.g4xh5 Rh8xh5 5.f3-f4 e5xf4 6.b3-b4 Qd4-e4+ 7.Kg2-h3 Qe4-e2 8.a2-a4 -+ (-19.91) Depth: 14 00:08:23 200306kN 1...Be4xf3+ 2.e2xf3 Bh4xg3 3.h2xg3 e5-e4 4.f3-f4 Qd4-d2+ 5.Rf1-f2 e4-e3 6.Rf2xd2 e3xd2 7.b3-b4 d2-d1Q 8.c4-c5 Qd1-d2+ 9.Kg2-h3 Qd2xb4 10.c5-c6 -+ (-20.49) Depth: 14 00:10:37 252800kN 1...Be4xf3+ 2.e2xf3 Bh4xg3 3.h2xg3 e5-e4 4.f3-f4 Qd4-d2+ 5.Rf1-f2 e4-e3 6.Rf2xd2 e3xd2 7.b3-b4 d2-d1Q 8.a2-a3 Qd1xg4 9.Kg2-f2 g7-g5 10.Kf2-e3 g5xf4+ 11.Ke3-e4 -+ (-20.89) Depth: 15 00:14:47 347552kN 1...Be4xf3+ 2.e2xf3 h6-h5 3.g4xh5 Rf8-f5 4.f3-f4 Bh4xg3 5.Kg2xg3 Rf5xh5 6.c4-c5 Qd4-c3+ 7.Rf1-f3 Rh5-h3+ 8.Kg3-g4 Qc3xf3+ 9.Kg4-f5 e5xf4 10.a2-a3 -+ (-21.89) Depth: 15 00:17:56 419329kN 1...Be4xf3+ 2.Rg3xf3 Rf8xf3 3.e2xf3 Qd4-d2+ 4.Kg2-g1 Bh4-g5 5.f3-f4 Bg5xf4 6.Rf1-f3 e5-e4 7.Rf3xf4 Qd2xf4 8.Kg1-g2 e4-e3 9.c4-c5 e3-e2 10.h2-h3 e2-e1Q -+ (-25.20) Depth: 15 00:28:30 666836kN 1...h6-h5 2.g4xh5 Rf8xf3 3.e2xf3 Be4-d3 4.Rf1-f2 Bh4xg3 5.Rf2-b2 Rh8xh5 6.h2-h4 Bg3xh4 7.a2-a4 Qd4xb2+ 8.Kg2-h1 Bd3-f5 9.b3-b4 Qb2xb4 -+ (-25.21) Depth: 15 00:35:33 842531kN 1...h6-h5 2.g4xh5 Rf8xf3 3.c4-c5 Bh4xg3 4.Rf1-f2 -+ (-26.89) Depth: 15 00:38:14 899113kN 1...h6-h5 2.g4-g5 Bh4xg3 3.h2xg3 h5-h4 4.g3xh4 Rf8-f4 5.Kg2-g3 Be4xf3 6.e2xf3 Rf4xh4 -+ (-#10) Depth: 15 00:57:51 1587134kN 1...h6-h5 2.g4-g5 Bh4xg3 3.h2xg3 h5-h4 4.g3xh4 Rf8-f4 5.Kg2-g3 Be4xf3 6.e2xf3 Rf4xh4 7.Rf1-f2 Qd4-f4+ 8.Kg3-g2 Rh4-h1 9.Rf2-d2 Rh8-h2# -+ (-#9) Depth: 16 01:13:15 2296853kN (Blass, Tel-aviv 30.12.2002) Uri
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