Author: Robert Hyatt
Date: 18:01:56 01/29/06
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On January 29, 2006 at 13:31:15, David H. McClain wrote: >On January 29, 2006 at 10:42:03, Robert Hyatt wrote: > >>This reminds me of a "hobby" of mine, playing blackjack. >> >>Card counters often discuss the many "basic strategy departure index plays" and >>ask "how important is it to learn the indexes for the uncommon plays like when >>to double 8 vs 6 and the like?" >> >>The answer is in two parts: >> >>(1) the hands are not very common, which means playing them correctly or >>incorrectly will not have a great influence on your long-term winning edge; but >> >>(2) when the situation comes up, and you have a big bet on the table because of >>the positive count, suddenly that "not very important play" can be the >>difference between a couple of hundred bucks and zero. >> >>So while they are not used often, when they are used it is sometimes critical. >>I have seen Crafty win many KRP vs KR endings where its internal evaluation >>thinks it is a draw because the enemy king is too close to the promotion square, >>but due to a subtle rook move it is exactly one square too far away. This is >>nice to know if you enter some long combination where the final position is the >>resulting KRP vs KR ending, and you just traded everything away in a winning >>position to reach what you hope is a really winning position. > >Robert, > >If your machine opponent has the same EGTBs you have, wouldn't the ending still >have already been established before they came into play? DHM That assumes a lot. 1. Both search the tree and probe the tables the same way. 2. That the original position is a fixed result. For example, if the position is a win for white, and white keeps poking around in the tree until it finds a way to capture into the 5-piece ending that is actually won for white, then white having them helps. And whether black has 'em or not won't make one bit of difference...
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