My last post was about this position, asking the reader to evaluate 7...Bxc3+ by black here.
Two people attempted to answer this, and both came up with what I believe is the right answer for the right reasons. I don't think the move is good, because:
1) Even if it were the right idea in this position,why play it immediately? The knight is pinned and not going anywhere. I suppose white can guarantee capturing on c3 with a piece rather than a pawn should black let him get Qb3 in, but...
2) The idea is the wrong one, anyway. In a stroke, the move makes things much easier for white. The dark-squared bishop gets a lovely diagonal to power down unopposed, the potentially weak d4-pawn gets a pawn on c3 to support it (the c3 pawn is not nearly as weak as the d4 pawn, because it's much harder to get black pieces to defend it) and perhaps worst, black is left with a load of minor pieces with nothing to do.
My opponent decided to play 7...Bxc3+ in the hope of getting a good knight versus bad bishop position. Somehow, I don't think the relative quality of the minor pieces went quite the way he'd thought:
3 months ago