Author: Uri Blass
Date: 08:04:12 10/06/00
Go up one level in this thread
On October 06, 2000 at 10:15:17, Simon Finn wrote: >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 I am not sure about it. The analysis may be wrong but it does not prove that white cannot win. [D]K1k5/8/1p6/8/P2b4/8/8/2R5 b - - In this position that you posted white can win by 1...Bc5 2.a5 Kc7 3.Ka7 with the idea 4.axb6 and not 4.a6. If white can force this position then white wins. Uri
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