Author: John Lowe
Date: 05:28:26 12/29/02
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On December 29, 2002 at 07:51:25, Drexel,Michael wrote: >On December 29, 2002 at 05:45:00, John Lowe wrote: > >>On December 29, 2002 at 00:26:50, Les Fernandez wrote: >> >>>[D]4k3/8/8/8/8/2P5/1PPP4/4K3 w - - >>> >>>The above pawn structure to the best of my knowledge can't ever be reached since >>>the c3 pawn would have had to come from either b2-c2-d2. Are there alot of >>>these type of positions or are there a handful of pawn structures that we know >>>can't happen? Perhaps someone knows of a link that discusses this or can shed >>>"some" light as to what types of structures I can be made aware of. I am >>>working on an idea to increase our data in the C.A.P project for which an >>>understanding on reachable pawn positions is important. Any input that you can >>>provide me with would be deeply appreciated. It may be that there are so many >>>various scenario's that I might just have to leave out this portion of what I am >>>trying to do and just work with the other entities but I would prefer to work >>>pawns into my idea if possible. >>> >>>Thanks, >>> >>It is possible to get, within the rules - not the sensible game - a white pawn >>on a2,a3,a4,a5,a6 and a7 >> >>This will "cost" 15 captures leaving no capturable pieces for the g2 and h2 >>pawns. It will involve making king-side black pawns available for capture by >>sacrificing white pieces to them - it will take some analysis to discover how >>but my guess is that it can be done. >> >>Migrations bigger than this will be outside the rules. >> >>Does this help >> >>>Les ? >> >>Regards >> >>John > >Sorry John but this can not be done: > >[D] k7/P7/P7/P7/P7/P7/P7/K7 w - - 0 1 > >This pawn structure can not be reached within the rules. >The problem is: >you have not enough white pieces available in order to sacrifice them to make >all black king-side pawns available. Hi Michael, Some ground rules: 1) Every white pawn move must be a capture (excluding g pawns and h pawns) 2) Three black kingside pawns cannot be captured on their "home" files 3) Only the white "f" pawn can capture on the "e" file - AND THAT ONLY ONCE ): OK you got me :) Happy new year John
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