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Subject: Re: Can any programs solve this Endgame problem?

Author: Eric Adolph

Date: 09:32:09 11/22/98

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ChessMaster 6000 finds the move in 5 seconds, then calculates a few variations
until 4:18, when it plays the move. This was on a 40 moves in 120 min. time
control. On a time control on 10 min.s a game, it finds the move in 2 seconds
and plays it in 13 seconds.

On November 22, 1998 at 10:52:02, Bela Andrew Evans wrote:

>This position arose in a game I played at Mechanic's Institute
>in San Francisco last week:
>[FEN "6k1/8/P3P3/1p4P1/1b6/5R2/r7/7K b - - 0 1"]
>The programs I have at home all want to play 1...Rxa6 here,
>which only draws after 2. Rb3 Ra4 3. g6.  But the winning move is
>1...Bd6!  The main variation runs 2. Rf7 Rxa6 3. Rd7 Bc5! 4. Rd5
>Rc6 5. Re5 Kf8, and now white has a choice of 6. Rf5+, 6. g6, or
>6. e7+, but all variations eventually lead to lost rook and pawn
>endgames.  6. Rf5+ Ke7 7. g6 Kxe6 8. Rg5 Rc8 9. g7 Kf7; 6. g6 b4
>7. g7+ Kxg7 8. e7 Bxe7 9. Rxe7 Kf6; or 6. e7+ Ke8 7. g6 b4 8. Rg5
>Bd4 9. g7 Bxg7 10. Rxg7 Rb6.  I am curious if any programs solve
>this, especially the ones with tablebases.... Oh, and this is all
>home analysis, so feel free to poke holes in it.  If anyone can
>find a draw for white after 1...Bd6!, please let me know.
>
>Bela Evans, USCF 2218



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