Author: chandler yergin
Date: 14:55:12 03/30/05
Go up one level in this thread
On March 30, 2005 at 13:58:12, Dann Corbit wrote: >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. The Black king CAN stop the White pawns.. The White must lose a move, and cannot stop the Black Pawns..
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