Author: Aaron Tay
Date: 13:39:26 03/20/02
Go up one level in this thread
On March 20, 2002 at 16:13:45, Albert Silver wrote: >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 two points that I believe to be decisive are: > >- It attacks and pressures the center (never lost sight of the battle for the >center) >- Allows play and pressure on both the c and d files. >- Once white's c-pawn is gone the d5 square is pretty nice. > >As to a5, the problem is that it doesn't really do anything. Push-push-push and >what do you get? c3 as a target? Not even that. Maybe it's trying to open the a file..Bonuses for rook on open file and all that One ametuer Chess engine i used to try, always played like this when out of book. I took a look at it's position parimeters (which were in a text file) there are a +2 or something (i can't remember exactly) bonus for rooks on open files.. Aaron > Albert
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