Author: Uri Blass
Date: 23:30:41 10/01/03
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On October 01, 2003 at 20:56:38, Thomas Mayer wrote: >Hi Will, > >[D]8/k3P3/p3K2n/1n3p2/1N4b1/1P1p1p2/8/4B3 w - - 0 1 > >>I don't know, Thomas, I'll have to agree with Uri here. Amateur also doesn't >>consider underpromos, and it solves it pretty fast. > >well, for that reason I have created a Quark that also does not produce >underpromotions... and you are right, it has the solution WAY faster, six plys >earlier... unbelieveable... Can anyone explain that ? Nothing strange. The solution include lines that the opponent needs to underpromote to a knight to prevent a checkmate. If you do not consider them then it is easy to see the right move. Nc6+ Kb8 Na5+ Kb6 Bf2+ Kxa5 e8Q Nc7+ Kd6 Ne8+ Kc5 d2 Bd4 and now d1N is the only way to prevent checkmate. Uri Uri
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