Author: Uri Blass
Date: 12:36:43 03/02/01
Go up one level in this thread
On March 02, 2001 at 15:24:07, Dann Corbit wrote: >On March 02, 2001 at 14:46:27, Uri Blass wrote: > >>On March 02, 2001 at 14:39:10, Sune Larsson wrote: >> >>> >>> [D]1k3b1q/pP2p1p1/P1K1P1Pp/7P/2B5/8/8/8 w - - 0 1 >>> >>> Horwitz,B 1885 >>> >>> This one might prove as mission impossible. Black is totally paralysed >>> from start and white is winning - but how?? Maybe more amusing for >>> humans than for silicons. One could characterize black's position >>> as slightly passive ;) but how could white make progress. Looks hard... >>> >>> Test: Win it! Draw scores like 0.00 are not trusted... >>> >>> Sune >> >>I believe that for humans it is easy. >> >>The idea is simply zunzwang because it is clear that other things do not work. >> >>1.Kd7 Qg8 2.Bb5 Qh8 3.Kd8 Qg8 4.Bd7 Qh8 5.Be8 Qg8 6.Kd7 Qh8 7.Bf7 >> >>I did not use a computer to find this line. > >I think I came up with the same trajectory as you did. Unfortunately, the >computer tells me that the final position is a draw! > >1k3b1q/pP2p1p1/P1K1P1Pp/7P/2B5/8/8/8 w - - >1k3b1q/pP1Kp1p1/P3P1Pp/7P/2B5/8/8/8 b - - >1k3bq1/pP1Kp1p1/P3P1Pp/7P/2B5/8/8/8 w - - >1k1K1bq1/pP2p1p1/P3P1Pp/7P/2B5/8/8/8 b - - >1k1K1b1q/pP2p1p1/P3P1Pp/7P/2B5/8/8/8 w - - >1k1K1b1q/pP2p1p1/P3P1Pp/1B5P/8/8/8/8 b - - >1k1K1bq1/pP2p1p1/P3P1Pp/1B5P/8/8/8/8 w - - >1k1K1bq1/pP1Bp1p1/P3P1Pp/7P/8/8/8/8 b - - >1k1K1b1q/pP1Bp1p1/P3P1Pp/7P/8/8/8/8 w - - >1k1KBb1q/pP2p1p1/P3P1Pp/7P/8/8/8/8 b - - >1k1KBbq1/pP2p1p1/P3P1Pp/7P/8/8/8/8 w - - >1k1K1bq1/pP2pBp1/P3P1Pp/7P/8/8/8/8 b - - >1k1K1b1q/pP2pBp1/P3P1Pp/7P/8/8/8/8 w - - >[D]1k3b1q/pP1KpBp1/P3P1Pp/7P/8/8/8/8 b - - The computer is not telling you the truth. White is winning in the final position after 7...Qg8 8.Kd8 Qh8 9.Ke8 Kc7 10.b8Q+ Kxb8 11.Kd8 Ka8 12.Kc8 Qg8 13.Kc7 My line was wrong because black could draw by 4...Qxe6 Uri
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