Author: Robert Hyatt
Date: 13:13:26 06/13/02
Go up one level in this thread
On June 13, 2002 at 14:58:45, Robert Henry Durrett wrote: >On June 13, 2002 at 13:05:47, Robert Hyatt wrote: > >>On June 13, 2002 at 11:52:30, Benny Antonsson wrote: >> >>>[D]8/3k4/8/8/3PK3/8/8/8 w - - 0 1 >> >> >>OK... White to move wins by moving the king in front of the pawn >>and assuming the opposition. Any other white move draws. Unfortunately, >>the opposition doesn't help you a bit if your opponent can "pass" (which is >>what the null-move allows). > >Pardon my French, but doesn't this make using "null-move" kinda dumb????????? > >Bob D. > You got it. :) this is what happens in zugzwang positions and it is why null-move isn't used in pawn-only endings. Double-null-move will fix this, but with so many zugzwang positions in such cases, it is simply extra overhead... >> >>IE I play Kd5, which wins, but you pass, and now _you_ have the >>opposition and the game is a draw. Black is in zugzwang because as it >>sits after white plays Kd5, the game is a draw, but as soon as black moves >>its king, no matter where it moves to, the game is lost. But null-move >>allows it to not move and hold the draw, greatly confusing the search...
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