Author: Marc van Hal
Date: 08:44:05 03/21/02
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On March 20, 2002 at 15:13:58, Gian-Carlo Pascutto wrote: >In the Dutch championship 2001, my program reached the following >position with black against Rebel Century > >[D]r2q1rk1/pbp1bppp/1p2pn2/8/3P1B2/2PB1N2/PP2QPPP/R4RK1 b - - 0 1 > >It played the losing move a5?, and proceeded with the 'plan' of >pushing it further along the a-file. > >Nowadays, it would find the correct c5 after about a minute >of search, but it is clear by looking at the variations that >it is more due to luck and that it is still not really understanding >what is going on. > >I am wondering if one of the strong players is able to explain >why c5 is good and a5 is not. I would play c5 myself, but I >have to admit I would not be able to explain why it is better >either. I just know it is good to hit at the d4 pawn with the >c pawn if possible, but I suspect there is more to it? > >The corect answer from that position was that after a5 Black canot play a6 b5 to build up "COUNTERPLAY" against the centre (e4) a mistake many programs still do make Not finding ways to build up counter play against an attack. And the best defense still is the ofence! The fact that the C-file becomes weak is treu But from a lower valeu The fact that the position from the queen and bischop in that position is good for both weakening the C-file and Black can't play b5 now. is treu Black will looses valeauble tempo's by playing a5'a4 which simply can be rejected by 1 move b3 Regards Marc
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