Author: Dann Corbit
Date: 10:58:12 03/30/05
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On March 30, 2005 at 04:35:41, Dieter Buerssner wrote: >On March 29, 2005 at 23:37:20, Dann Corbit wrote: > >>That's a funny one, because even the lamest human can see it instantly. > >Dann, I am lamer than the lamest ... >I cannot see it. Also compare the following similar positions: > >[D] 1k6/8/8/8/PPP5/5p1p/8/6K1 w - - > >Here all three white pawns are advanced by two squares -> still won for black. >Now we only advance a and c pawns: > >[D] 1k6/8/8/8/P1P5/5p1p/1P6/6K1 w - - > >And here white wins. White also wins in the next position: > >[D] 1k6/8/8/8/5p1p/8/PPP5/6K1 w - - > >And a serious question: how to see fast, which of those positions is won and >which is lost? Can anybody do it without deep calculation? Probably, I am just supremely overconfident at times. The positions you posted seem more difficult to me, but I would *guess* they are still won. In each case I would have to see if the king can stop the pawns. It is obvious that the white king is totally stuck. You might as well nail him to the board. So, the question is, can I prevent the advance of the white pawns with a lone king. Since it looks to me like I can, the white king is dead. On the other hand, there are lots of places to make a false step, so even though I know I can win, I also might lose it by a blunder. Now, if you split the 3rd white pawn out one square to the right, then black is dead.
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