Author: Uri Blass
Date: 07:52:23 11/25/02
Go up one level in this thread
On November 25, 2002 at 10:14:27, Terry McCracken wrote: >On November 25, 2002 at 00:29:56, John Merlino wrote: > >>On November 24, 2002 at 23:56:30, Terry McCracken wrote: >> >>>[D]8/4p3/4Q3/8/8/k1p3PP/1q3P1K/8 w - - 0 1 >>> >>>This is reposted as it was given little attention. >>> >>> >>>http://www.talkchess.com/forums/1/message.html?266990 >> >>Chessmaster 9000, on a P3-733, gives up on Qxe7+ in two seconds: >> >>Time Depth Score Positions Moves >>0:00 1/3 0.20 5091 1.Qxe7+ Ka2 2.Qe6+ Kb1 3.Qf6 >>0:00 1/4 0.20 10263 1.Qxe7+ Ka2 2.Qe6+ Kb1 3.Qe1+ Qc1 >> 4.Qe5 >>0:00 1/5 0.18 25204 1.Qxe7+ Ka2 2.Qe6+ Kb1 3.Qe1+ Ka2 >> 4.h4 c2 5.Qe6+ Kb1 >>0:00 1/6 0.00 64218 1.Qxe7+ Ka2 2.Qe6+ Kb1 3.Qe1+ Ka2 >> 4.Qe6+ >>0:02 1/7 -0.18 154813 1.Qxe7+ Ka2 2.Qe6+ Qb3 3.Qa6+ Kb1 >> 4.h4 c2 5.Qg6 Qc3 6.f4 >>0:02 1/7 0.00 206769 1.Qa6+ Kb4 2.Qb7+ Kc4 3.Qe4+ Kb3 >> 4.Qe6+ Ka4 5.Qc6+ Kb3 6.Qe6+ >>0:03 2/8 0.00 296235 1.Qa6+ Kb4 2.Qb7+ Kc4 3.Qe4+ Kb3 >> 4.Qe6+ Ka4 5.Qc6+ Kb3 6.Qe6+ >>0:07 3/9 0.00 624641 1.Qa6+ Kb4 2.Qb7+ Kc4 3.Qe4+ Kb3 >> 4.Qe6+ Ka4 5.Qc6+ Kb3 6.Qe6+ >> >>jm > >Yes, the only way to draw is Qa6+!! CM 9000 is Stong! > > >1. Qxe7+ Ka2 2. Qe6+ Kb1 3. Qe4+ c2 is dead lost for White! > >1. Qxe7+ Ka2 2. Qe6+ >( 2. Qa7+) >2... Kb1 3. Qe4+ >( 3. Qe1+ Qc1 ) >3... c2 4. Qe1+ > >Terry After 1.Qxa7+Ka2 2.Qe6+ Kb1 3.Qe4+ c2 Yace can see only a draw score. New position [D]8/8/8/8/4Q3/6PP/1qp2P1K/1k6 w - - 0 1 Analysis by Yace 0.99.56: 4.Qe4xc2+ Kb1xc2 -+ (-6.10) Depth: 1 00:00:02 4.f2-f4 +- (2.14) Depth: 1 00:00:02 4.f2-f4 Kb1-c1 +- (2.00) Depth: 2 00:00:02 4.f2-f4 Kb1-a1 5.Qe4-a4+ Ka1-b1 +- (2.13) Depth: 3 00:00:02 4.f2-f4 Kb1-a1 5.Qe4-a4+ Ka1-b1 6.Qa4-e4 = (0.00) Depth: 4 00:00:02 4.f2-f4 Kb1-a1 5.Qe4-a4+ Ka1-b1 6.Qa4-e4 Kb1-a1 7.Qe4-a4+ Ka1-b1 8.Qa4-e4 = (0.00) Depth: 4 00:00:02 4.h3-h4 Kb1-a1 5.Qe4-a4+ Ka1-b1 = (0.01) Depth: 4 00:00:02 4.h3-h4 Kb1-a1 5.Qe4-a4+ Ka1-b1 6.Qa4-e4 Kb1-a1 = (0.01) Depth: 4 00:00:02 4.g3-g4 Kb1-a1 5.Qe4-a4+ Ka1-b1 = (0.02) Depth: 4 00:00:02 4.g3-g4 Kb1-a1 5.Qe4-a4+ Ka1-b1 6.Qa4-e4 Kb1-a1 = (0.02) Depth: 4 00:00:02 4.Qe4-f5 Kb1-a1 5.Qf5-a5+ Ka1-b1 = (0.03) Depth: 4 00:00:02 4.Qe4-f5 Kb1-a1 5.Qf5-a5+ Ka1-b1 6.Qa5-d5 c2-c1Q 7.h3-h4 = (0.03) Depth: 4 00:00:02 4.Qe4-g6 Kb1-a1 5.Qg6-a6+ Ka1-b1 = (0.04) Depth: 4 00:00:02 4.Qe4-g6 Qb2-a3 5.f2-f4 Qa3-f3 +- (1.79) Depth: 4 00:00:02 4.Qe4-d3 Kb1-c1 +- (1.80) Depth: 4 00:00:02 4.Qe4-d3 Kb1-a2 5.Qd3-d5+ Ka2-a3 6.Qd5-a5+ Ka3-b3 7.Qa5-b5+ Kb3-c3 +- (1.83) Depth: 4 00:00:02 4.Qe4-d3 Kb1-a2 5.Qd3-d5+ Ka2-a3 6.Qd5-a5+ Ka3-b3 7.Qa5-b5+ Kb3-c3 8.Qb5-e5+ Kc3-b3 9.Qe5-e3+ Kb3-c4 10.Qe3-e6+ Kc4-c3 11.Qe6-e5+ Kc3-b3 12.Qe5-b8+ Kb3-c3 13.Qb8-e5+ +- (1.76) Depth: 5 00:00:02 15kN 4.Qe4-d3 Kb1-a2 5.Qd3-d5+ Ka2-a3 6.Qd5-a5+ Ka3-b3 7.Qa5-b5+ Kb3-c3 8.Qb5-e5+ Kc3-b3 9.Qe5-e3+ Kb3-c4 10.Qe3-e4+ Kc4-c3 11.Qe4-e5+ Kc3-b3 12.Qe5-e3+ Kb3-c4 13.Qe3-e4+ Kc4-c3 14.Qe4-e5+ +- (1.71) Depth: 6 00:00:02 38kN 4.Qe4-d3 Kb1-a1 5.Qd3-a6+ Ka1-b1 6.Qa6-c6 c2-c1Q 7.Qc6-f6 ± (1.31) Depth: 7 00:00:02 88kN 4.Qe4-d3 Kb1-a1 5.Qd3-a6+ Ka1-b1 6.Qa6-g6 Kb1-a1 7.Qg6-a6+ Ka1-b1 8.Qa6-g6 Kb1-a2 9.Qg6-f7+ Ka2-b1 10.Qf7-f5 Kb1-a1 11.Qf5-a5+ Ka1-b1 = (0.00) Depth: 7 00:00:02 88kN 4.Qe4-d3 Kb1-a1 5.Qd3-a6+ Ka1-b1 6.Qa6-g6 Kb1-a2 7.Qg6-a6+ Ka2-b1 8.Qa6-g6 Kb1-a2 9.Qg6-a6+ Ka2-b1 = (0.00) Depth: 8 00:00:03 143kN 4.Qe4-d3 Kb1-a1 5.Qd3-a6+ Ka1-b1 6.Qa6-g6 Kb1-a2 7.Qg6-a6+ Ka2-b1 8.Qa6-g6 Kb1-a2 9.Qg6-a6+ Ka2-b1 = (0.00) Depth: 9 00:00:03 229kN 4.Qe4-d3 Kb1-a1 5.Qd3-a6+ Ka1-b1 6.Qa6-g6 Kb1-a2 7.Qg6-a6+ Ka2-b1 8.Qa6-g6 Kb1-a2 9.Qg6-a6+ Ka2-b1 = (0.00) Depth: 10 00:00:03 434kN 4.Qe4-d3 Kb1-a1 5.Qd3-a6+ Ka1-b1 6.Qa6-g6 Kb1-a2 7.Qg6-a6+ Ka2-b1 8.Qa6-g6 Kb1-a2 9.Qg6-a6+ Ka2-b1 = (0.00) Depth: 11 00:00:04 948kN 4.Qe4-d3 Kb1-a1 5.Qd3-a6+ Ka1-b1 6.Qa6-g6 Kb1-a2 7.Qg6-a6+ Ka2-b1 = (0.00) Depth: 12 00:00:07 1816kN 4.Qe4-d3 Kb1-a1 5.Qd3-a6+ Ka1-b1 6.Qa6-d3 = (0.00) Depth: 14 00:00:35 12790kN 4.Qe4-d3 Qb2-e5 5.h3-h4 Kb1-b2 6.Qd3-d2 Qe5-c3 7.Qd2-e2 Kb2-a2 = (-0.01) Depth: 16 00:05:21 119886kN 4.Qe4-f5 Qb2-d4 5.Kh2-g2 Kb1-b2 6.Qf5-b5+ Kb2-a3 7.Qb5-a5+ Ka3-b3 8.Qa5-b5+ Kb3-c3 9.Qb5-a5+ Kc3-d3 10.Qa5-a6+ Qd4-c4 11.Qa6-a3+ Kd3-d2 12.Qa3-d6+ Kd2-e2 13.Qd6-e7+ Ke2-d1 14.Qe7-d7+ Kd1-e1 15.Qd7-e7+ Ke1-d2 16.Qe7-e3+ Kd2-d1 17.Qe3-f3+ Qc4-e2 18.Qf3-b3 Kd1-d2 19.Qb3-b4+ = (0.00) Depth: 16 00:07:35 171272kN 4.Qe4-f5 Qb2-d4 5.Kh2-g2 = (0.00) Depth: 16 00:07:39 172785kN (Blass, Tel-aviv 25.11.2002) Can you convince yace by going backward that Qxe7+ is losing? If you can then what is your tree? Uri
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