Author: Tom Likens
Date: 10:52:32 04/18/02
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Hello Vincent, What exactly is a double nullmove? I'm guessing, without any evidence, that you are performing two null moves in a row (i.e. allowing both sides to pass on their move, while reducing the depth of the search by 2x what a normal nullmove reduction would equal). Correct, incorrect?? I'd be interesting in hearing your thoughts (or reading them would be fine also ;) regards, --tom On April 18, 2002 at 09:40:00, Vincent Diepeveen wrote: >On April 17, 2002 at 15:43:23, Jesus de la Villa wrote: > >With a correctly implemented double nullmove the insight >is easy to see that there is not a single position which >double nullmove cannot solve. > >Normal nullmove on the other hand possibly cannot even solve >a single zugzwang (which is it's *only* drawback), because >it always allows one side to not move in a position X. > >Therefore double nullmove has no drawbacks when in a game >where doing nothing is in the overwhelming case bad. > >Note that a good definition of zugzwang is a position where >playing *any* move is bad for the side to move. > >> >>Have someone defined the general rule(s) where null move >>is unable to find simple combinations?, and if so, which >>are those rules ? >> >>"Obviusly" is more expensive to check it than to not >>use Null Move. >> >>Thanks for asking >> >> >> >>PS. I hope you undertand my poor English :)
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