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Subject: Re: EGTB access and playing strength

Author: Robert Hyatt

Date: 07:42:03 01/29/06

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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.



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