Author: Robert Hyatt
Date: 19:47:14 09/28/01
Go up one level in this thread
On September 28, 2001 at 12:55:04, Uri Blass wrote: >New position >[D]rnb2r1k/pp1p2pp/2p1P3/4p3/1qB3Q1/2N4P/P1P3P1/1RB4K b - - 0 1 > >Analysis by Crafty 18.10: > >2...Qxc3 3.exd7 Nxd7 > -+ (-8.27) Depth: 1/11 00:00:00 >2...Qxc3 3.e7 Qe1+ 4.Kh2 > -+ (-6.88) Depth: 2/11 00:00:00 >2...Qxc3 3.e7 Re8 4.Bg5 Qxc2 > -+ (-7.11) Depth: 3/11 00:00:00 >2...Qxc3 3.e7 Re8 4.Bg5 Qxc2 > -+ (-7.11) Depth: 4/13 00:00:00 >2...Qxc3 3.e7 Qe1+ 4.Kh2 Re8 5.Qg5 d5 > -+ (-7.24) Depth: 5/13 00:00:00 >2...Qxc3 3.e7 Re8 4.Bg5 Qxc2 5.Rf1 d5 > -+ (-7.32) Depth: 6/17 00:00:00 97kN >2...Qxc3 3.e7 Re8 4.Bb2 Qb4 5.Qxg7+ Kxg7 6.Bxe5+ Kg6 7.Rxb4 Rxe7 > -+ (-6.81) Depth: 7/19 00:00:01 257kN >2...Qxc3 3.e7 Re8 4.Bb2 Qb4 5.Qxg7+ Kxg7 6.Bxe5+ Kg6 7.Rxb4 Rxe7 8.Bd3+ Kg5 > -+ (-6.81) Depth: 8/20 00:00:01 526kN >2...Qxc3 3.e7 Re8 4.Bb2 Qb4 5.Qxg7+ Kxg7 6.Bxe5+ Kh6 7.Rxb4 Rxe7 8.Bf4+ Kg6 >9.Kh2 > -+ (-6.69) Depth: 9/23 00:00:03 1186kN >2...Qxc3 3.Bb2 Qxc2 4.e7 Qxb1+ 5.Kh2 Re8 6.Qf3 h6 7.Qf8+ Rxf8 8.exf8Q+ Kh7 >9.Qg8+ Kg6 10.Bxe5 Qf5 11.Qxg7+ > -+ (-6.57) Depth: 10/25 00:00:09 3703kN >2...Qxc3 3.e7 Re8 4.Bh6 gxh6 5.Rf1 Qa3 6.Rf7 Qc1+ 7.Bf1 Qg5 8.Rf8+ Kg7 9.Qxg5+ >hxg5 10.Rxe8 Kf6 11.Rxc8 Kxe7 > -+ (-4.16) Depth: 11/25 00:14:53 541954kN > >(Blass, Tel-aviv 28.09.2001) > >Uri There is no program that avoids this problem. Given the right position. What happens is that all the "right" move ordering information is suddenly dead wrong. And the tree explodes at some depth where something new and unexpected is going on. There is no way to avoid it. It is rare. But it happens to _everybody_.
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