Author: Uri Blass
Date: 16:08:42 09/20/00
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On September 20, 2000 at 17:47:51, Vincent Diepeveen wrote: >On September 20, 2000 at 12:19:07, Uri Blass wrote: > >>On September 20, 2000 at 07:24:30, Uri Blass wrote: >> >>>On September 20, 2000 at 04:17:41, Uri Blass wrote: >>> >>>>On September 19, 2000 at 22:31:42, Dann Corbit wrote: >>>><snipped> >>>>>[D]2r3kr/5pp1/7p/3PQRb1/ppq1B3/8/PPP3PP/1K1R4 w - - acd 16; acn 287155000; ce >>>>>1150; pv Rxf7 Bf6 Rxf6 gxf6 Qe6+ Kf8 Qxf6+ Kg8 Qe6+ Kf8; pm Rxf7; id "C.A.P. >>>>>1418836"; c0 "Mark Young on September 15, 2000 at 00:29:11"; >>>> >>>>Chessmaster6000 can see mate in 20 at depth 2/12(time 19:12) and does not change >>>>its mind at depth 3/13 or 4/14 >>>> >>>>pv Rxf7 Bf6 Rxf6 gxf6 Qe6+ Kf8 Qxf6+ Kg8 Bf5 Qc7 d6 Qg7 d7 Rd8 Qxd8+ Kf7 Qc7 >>>>Rd8 Qxd8 Qf6 Qxf6+ Kxf6 > >Oh well, what if you give away a queen with black delaying it a move or so? This line was mate in 20. The main line leads to a shorter mate but chessmaster did not see it It may be possible for black to defend better but not to avoid mate in 20 or shorter mate. The last line of mate in 13 at depth 6/16 is more correct and assuming there is no bug in chessmaster black cannot force white to do the mate longer. Here is the last line at depth 6/16 again. pv Rxf7 Bf6 Rxf6 gxf6 Qe6+ Kf8 Qxf6+ Kg8 Re1 Qc7 d6 Qf7 Bd5 Rh7 d7 Rf8 Re8 Rg7 Rxf8+ Kh7 Be4 Qg6 Bxg6+ Rxg6 Qh8#
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