Author: Heiner Marxen
Date: 09:33:48 05/04/02
Go up one level in this thread
On May 04, 2002 at 09:29:14, Rodney Topor wrote: >On May 04, 2002 at 06:18:09, leonid wrote: > >>Hi! >> >>This one should be at reach of every program: >> >>[D]bbkrNQq1/n1P1R1rQ/n1q1R3/BqpqQNQK/3rQ3/3pP3/3pP3/3qQ2B w - - >> >>Please indicate your result. >> >>Thanks, >>Leonid. > >MacChess 5.0.1 on a 250MHz PowerBook G3 found a mate in 8 after about 6 mins 30 >secs. The PV is: > >1. cxd8=Q+ Qxd8 2. Rxc6+ Qxc6 3. Qe6+ Rd7 4. Qxd7+ Qcxd7 5. Nxe6+ Bxd6 >6. Nxd6+ Qxd6 7.Qxa8+ Nb8 8. Bb7# > >Apologies if I've made a typo in transcribing this - MacChess doesn't produce >output in a convenient form for copying. > >Rodney Hmm, something went wrong. According to Chest there is no mate-in-8. When I replay your above PV, after 1.cxd8=Q+ Qxd8 2.Rxc6+ Qxc6 3.Qe6+ Rd7 4.Qxd7+ Qcxd7 I reach [D]bbkqNQq1/n2qR1rQ/n7/B1p2NQK/4Q3/3pP3/3pP3/3qQ2B w - - where both, e6 and d6 are empty. If 5.Nd6+ would be meant: that is ambigous, and would be either Ned6+ or Nfd6+. May be there is a typo, but since Chest thinks there is no mate in 8, most probably you do not have the correct start position. Please double check. Cheers, Heiner
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