Author: Robert Hyatt
Date: 07:51:15 10/14/03
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On October 14, 2003 at 08:45:31, Tord Romstad wrote: >On October 13, 2003 at 16:50:41, Robert Hyatt wrote: > >>On October 12, 2003 at 11:57:40, Tord Romstad wrote: >> >>>Another reason I cannot solve your position is that I only include checks in the >>>qsearch in middle-game positions, and your position is classified as an endgame >>>position. >> >>There is another problem. In most cases, the check will be "unsafe". IE >>it hangs the rook. Of course the rook can't be captured without forcing a >>stalemate. But the check itself looks unsound using SEE or whatever, which >>makes it even harder to find unless you look at _all_ checks. And that _will_ >>explode the tree to unbearable space. > >Yes, I forgot to add that. This is one of the numerous restrictions I >have on which checks to search: I never search checks for which the SEE >returns a negative score. > >Tord As I said, doing only safe checks introduces yet another inaccuracy into an already inaccurate q-search. That's why I try to extend in the basic search where things are way more accurate.
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