downward wrote on 08/31/09 at 21:05:57:
Chebanenko Slav is definitely one of the most interesting openings around, but I don`t think it is that easy to play.
if white so whishes, he can play cxd5 on the 4th move or any of the other moves, resulting in a symmetrical pawn structure, which doesn`t suit everyone.
but most importantly, black usually must play creatively not to end up in a passive position. Here two games of Kamsky from Ordix Open come to mind. (against Potkin and Sasikiran). these losses were a pretty depressing sight. so I don`t think it is enough for black just to get his pieces out and get a good game (comparing for instance to dxc4 Slav).
In addition, after white plays c4-c5, the squares a5 and especially b6 are an easy target and black sometimes has to passively protect his b7 pawn till the end of the game.
also the move 4.-a6 is not a developing move, so in some lines black has to catch up in development. In a closed position this should not be a problem, but again, it doesn`t suit everyone.
Another important thing is that after 4.-a6 many different positions can arise, so black should know something about many other systems (QGD, Semi-Slav for instance).
this doesn`t mean that Chebanenko is a bad opening, after all many players with active style of play adopted it - Kasparpv, Topalov, Ivanchuk, Movsesian, Kamsky, Volkov etc, but it requires great deal of knowledge, understanding and creativity.
As I see it, this flexibility is also what draws me to this system. I won't employ it regularly, but with understanding of the Chebanenko, I can also do the opposite, i.e. play ...a6 in the exchange Slav, or against an early e3.