Author: Gian-Carlo Pascutto
Date: 10:05:15 08/26/05
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On August 26, 2005 at 12:48:30, Robert Hyatt wrote: >On August 26, 2005 at 09:04:06, Gian-Carlo Pascutto wrote: > >>On August 26, 2005 at 08:36:40, Bernhard Bauer wrote: >> >>>Here is what I get from Crafty19.20 for your second position. >>>A zugzwang position in a real game! >> >>> Rb8 >>> 8 0.34 -1 1. Rb1 >>> 8 0.36 -3.53 1. Rb1 Rxd3 2. Qxd3 Qg4 3. Rb8+ Kc7 >>> 4. Qc4+ Bc5 5. Rc8+ Kxc8 6. Qg8+ Kb7 >>> 7. Qxg7+ >> >>Some bug here?? The analysis is bogus, the line given is an easy draw, not a win >>for black. > >I suggest you look again. This is _not_ an "easy" draw. This is an easy mate >in 3 for black... > >Not sure who has the bug, but it isn't me. :) > >I spotted this easily as a human, so even though Crafty doesn't see it on the >end of that shallow search, -3.5 is certainly good enough to convince it that >black is better. _much_ better.. > >BTW, after Qxg7, Kb6 and white can't avoid Qxe4#. He can put it off by a spite >check tossing his queen, but that's it... ROTFL It's a stalemate. Those are draws where I live. The *goal* is exactly to get rid of all pieces "with spite checks tossing the queen". The last move in Crafty's variation is wrong, white can just play moves like Qc8+ etc... As I said, I forgot Crafty can't understand that because of how you do qsearch. -- GCP
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