Author: Howard Exner
Date: 23:13:27 10/12/99
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On October 12, 1999 at 20:54:47, Jeremiah Penery wrote: >On October 12, 1999 at 19:25:55, Howard Exner wrote: > >>On October 12, 1999 at 16:25:32, James T. Walker wrote: >> >>>Try Rebel 10C. It finds Kg3 in 2 seconds and never lets go! >> >>I tried this on all the Rebel versions that come with Rebel 10c. >>Even Decade and Rebel 7 play Kf3 in a few seconds. It does not >>seem rattled by the Zugzwang nature of the position. > >Rebel does not use null-move. Also, does it find the correct line to go with >Kf3? It finds a winning line in:1. Kf3 Bxf4 2. Kxf4 Kf8 3. Rh7 Rd4+ 4. Kxf5 Rxb4 5. Rxh6 (+3.10 and rising) Other defensive moves by black also seem futile. To compare evals I input the drawing move Bxe5: 1. Bxe5 Rxe5 2. Kf4 Rd5 3. Rh7 Rd4+ 4. Kxf5 Rxb4 5. Rxh6 Rb5+ 6. Ke4 Rb7 (+2.55 and not getting any better) One interesting sideline of this neat position is a possible scenario that could be reached : r5k1/1R6/6PP/8/1K6/8/8/8 w - - am h6h7; Here's another position that some programs may not get, but unlikely. The task is to avoid h7 which allows perpetual. This could be made more difficult by placing the white king on b1.
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