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Subject: Re: TB's & Castling

Author: Jeremiah Penery

Date: 20:50:52 03/06/02

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On March 06, 2002 at 19:18:16, Slater Wold wrote:

>Hyatt said in an earlier post that TB's don't take into account the ability to
>castle because it would be a waste.
>
>However, when I feed this position into any engine, it solves it in 0.00 as a TB
>win.
>
>[D]5Q1Q/5Q1Q/5Q1Q/5Q1Q/8/6P1/6k1/4KR1R w K -
>
>It shows 20 possible moves, all from TB's I am guessing.
>
>I cannot cut and paste the eval, because there isn't one, but I have:
>
>1.+ - (#4) Rf4
>2.+ - (#4) Kd1
>3.+ - (#4) Kd2
>4.+ - (#4) Ke2
>5.+ - (#4) Rf5
>6.+ - (#4) Rf6
>7.+ - (#4) Rf7
>8.+ - (#4) Rf8
>9.+ - (#4) Rhg1+
>10.+ - (#4) Rh4
>11.+ - (#4) Rh5
>12.+ - (#4) Rh6
>13.+ - (#4) Rh7
>14.+ - (#4) Rh8
>15.+ - (#5) g4
>16.+ - (#5) Rh2+
>17.+ - (#6) Rfg1+
>18.+ - (#5) Rf2+
>19.+ - (#10) Rh3
>20.+ - (#11) Rf3
>
>_Several_ of these moves take castling into accout.

Actually, Rf4 (and other of these moves) should be #3 if castling is taken into
account, not #4 as shown.

>After Rf4 Kxg3 my TB's show 28 moves.  The first move is 1. + - (#2) O-O, the
>last is 28. + - (#15) Rh8.

Moves don't come from the TB, the chess engine generates all the moves, and
feeds the resulting positions into the TB, which returns a mate score.



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