Author: Vasik Rajlich
Date: 02:42:04 12/10/04
Go up one level in this thread
On December 09, 2004 at 10:32:05, martin fierz wrote: >On December 09, 2004 at 09:52:25, Anthony Cozzie wrote: > >>On December 09, 2004 at 05:47:23, Vasik Rajlich wrote: >> >>>On December 08, 2004 at 22:32:52, Will Singleton wrote: >>> >>>>[d]r3k2r/pppqb1pp/1nn1bp2/4p3/8/2NP1NP1/PP1BPPBP/2RQ1RK1 b kq - >>> >>>With knight on b6 and bishop on e7 the black king must go kingside. >>> >>>In case of 0-0-0 white will continue with the automatic Ne4 and then decide with >>>pleasure between a2-a4, b2-b4, h2-h4 or Nc5. >>> >>>Vas >> >>What is very interesting here is that both you and martin like White (even after >>0-0) while Zappa is quite happy with Black (and I _think_ Chessmaster is as >>well, although I always get confused with all the signs). >> >>It is pretty obvious why Zappa likes Black (simple computerish things like good >>mobility and better center control) but what does White have? > >white definitely has some things here: >-> one central pawn more >-> pressure on the semi-open c-file (d3 is protected by e2, c7 is not protected, >if you play c7-c6, white has the simple plan of b4-b5 - creating a weak pawn in >some way or other) >-> general pressure against the black queenside (Bg2->c6/b7, Ne4-c5->b7, Rxc6 is >often a motif if it cripples blacks pawn structure and wins e5 - not in this >specific position, but after an active move such as f6-f5). > >positionally speaking, white is a bit better here; compare this with all open >sicilians which typically are either fast wins for white or long wins for black >- either white crashes through with his initiative, or he suffers from his >positional "error" (3.d4 cd4 is nice in principle for black). > >cheers > martin Yes - in fact white might be more than a little bit better. Black has really misplayed this - castling queenside goes really badly with .. Be7 and especially .. Nb6, while castling kingside goes badly with .. f6 (.. f5 is appropriate in that case). Black should castle kingside here just to avoid getting crushed. In general, computers don't understand the Sicilian. (This is a reversed Sicilian of course.) They constantly think white (here black) is better, and from what I've seen white scores extremely well in comp-comp Sicilians. As far as what eval terms are missing from the evaluations - that's hard to say. Maybe more weight needs to be given for the extra central pawn (as black always has in the Sicilian). Martin is right about the queenside play but it's hard to say what feature is responsible for it. Maybe it's just that extra central pawn. Or maybe something like: if one side has an extra central pawn, you can forgive him for having less space and being less mobile. Vas
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