Author: Simon Finn
Date: 07:15:17 10/06/00
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On October 06, 2000 at 08:40:19, Uri Blass wrote: >On October 06, 2000 at 08:04:48, Simon Finn wrote: > [snip] >>Stage 4: Black must still keep his king on c7/c8. This allows White >>to take advantage of the pin on the bishop to push his pawn to a7. >> >>[D]K7/P1k5/1p6/2b5/8/8/8/2R5 w - - >> >>Stage 5: Losing a move with the rook if necessary, White reaches >>the following position: >> >>[D]K7/P1k5/1p4R1/8/3b4/8/8/8 w - - bm Rc6; >> >>Stage 6: White sacrifices his rook at c6 to free his king and promote his pawn. >> >>I doubt whether Fritz will find Fischer's winning idea, but it >>deserves the chance! > >In page 181 is written >"AS Evens originally pointed out in ChessLife" >so I guess that Evens and not Fisher has the rights for the idea. > >Uri I trusted Fischer's analysis, but it may be wrong! Fischer's (Evan's?) analysis for Stage 5 starts at the following position (with colours reversed): [D]K1k5/P7/1p6/2b5/8/8/8/2R5 w - - and continues: 1. Rh1 Kc7 2. Rh7+ Kc8 3. Rh6 Kc7 4. Rc6+ and White wins but after 1. Rh1 Black appears to be able to draw with 1...Bd6! For example: 1. Rh1 Bd6 2. Rh6 Be5 3. Rxb6 Kc7 with a positional draw. Black keeps his King on c7/c6/b6 (keeping the White king out of b7) and his Bishop on e5/f4/g3/h2 (keeping the White king out of b8) and there's no zugzwang because the Bishop always has at least one safe move. 3. Rc6+ Bc7 4. Rc1 b5 5. Rc2 b4 6. Rc4 b3 7. Rb4 Be5 8. Rxb3 Kc7 leads to the same draw. 3. Rh8+ Kc7 also doesn't achieve anything for White. So Steve can have his draw! Simon
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