Author: Shep
Date: 00:28:57 08/19/99
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On August 18, 1999 at 20:35:00, Pete R. wrote: >I have a position as follows: white has king and rook, black has king knight and >pawn. I have the knpkr tablebase files. When it's black to move, the tablebase >returns the value instantly. However when it's white to move the program thinks >while doing tablebase hits, presumably on the 4 man set. Evidently I don't >understand tablebase files, so could someone explain to me what's going on here? >Knpkr only applies to white having knp?? OK, so you said you reassured you have both knpkr tablebases, right? You don't say which program you are using. Hiarcs for example has some "swindle" mode where it does not use the tablebases for the "winning" side if the TB score is a draw. Hmmm, that does not sound very clear, right? OK, here's a simpler example than your NP vs. R: Suppose you have KRKP. There is no chance Black will wins this, agreed? (Except for obvious blunders or the trivial cases where the pawn promotes immediately.) Now suppose further that Hiarcs has the rook and the TB lookup returns a draw. However, there is still a little chance your opponent might "screw up" and lose. So Hiarcs will use its normal search and try to "provoke" a loss on the opponent's side. Seems the same happens in your KNPKR situation: Hiarcs sees it's drawn but tries to win it anyway because the NP side may make a stupid mistake, dropping one of its pieces, probably into a lost KNKR or something. --- Shep
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