Author: Vincent Lejeune
Date: 06:34:27 04/25/02
Go up one level in this thread
On April 25, 2002 at 09:13:30, Vincent Lejeune wrote: >On April 25, 2002 at 08:39:53, Vincent Lejeune wrote: > >>On April 25, 2002 at 08:14:25, Otello Gnaramori wrote: >> >>>On April 25, 2002 at 07:21:15, Sune Fischer wrote: >>> >>>>When/if computers learn to recognize these "trivial" drawn positions, then I >>>>think they will become virtually unbeatable by humans. >>> >>>I don't think it will be a "mission impossible" task to implement that >>>particular function (grab the never concept in fortress like positions) with a >>>major effort from programmers and researchers in chess computer area. >>>I think that to solve that problem will request a reasonable high amount of work >>>by the "authorized personnel". >> >>This concept is a long termne planning it's a revolution in computer chess >>because : >> 1) it requiers a big amount of knowledge (calculate entry point in the >>ennemy field of the king and other piece(s) >> 2) it requiers a big amount of ressource (many things to view for one >>position, may be fortress-hash-table possible ??? ) >> >>I think such evaluation would be possible only in restricted circumstances, e.g. >>: endgame at low depth (below 7 or 8 plies) >> [d]8/1p6/4k3/5p2/pP2bP1p/2N1P1pP/1P6/6K1 b - - 0 0 >Here's a picture of board the after move 51.Nc3 > > '1' is a square "control" by white and white can't force white to free the >control of this square > 'B' is a square where a black piece is blocked (very often as here : a pawn) > > :ABCDEFGH >-+-------- >8: >7: >6: >5:11111B1 >4: 1 1B >3:1 1 >2:1 1 >1: 1 1 > >So you can see there's a wall : a5,b5,c5,d5,e5,f5,g5,g4,h4 >This 9 squares are sufficient to close definitively the position, >and one condition needed to be a fortress : the white side can make moves >without breaking the wall : here Kg1-f1-g1-f1 (or f2 after black play g3) > >One day there will be such knowledge in our chessprogram ! > > >> >> >> >>> >>>w.b.r. >>>Otello
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