Today, we will see a typical exchange sacrifice on c3 (usually taking a knight) in the Sicilian defence. Black players like to make this sacrifice in order to get one or more following advantages:
1) Usually Black ends up with a knight and a central pawn against a rook with White’s busted pawn structure creating additional targets. Even if White has castled short this can prove to be sufficient compensation, though it varies from case to case.
2) White’s king won’t feel safe any longer in the absence of key defender and damaged pawn structure (usually if White castles long).
3) This typical sacrifice also increases the quality of other pieces, particularly Black’s dark square bishop and an active knight in the center.
4) It is very difficult for White to use his exchange in the absence of open files.
Here is an instructive example:
Nakamura against Gelfand in 2013
Q: In a given position Nakamura played 24. f5. How would you with the Black pieces?
24…Rxc3!! 25. bxc3 Qxa3+
25…Ne5 26. Kd2 Bd7 is an option given in chess informant.
26. Kd2 Nf6!
Compare the activity of each side’s pieces. The Black ones are far more active and dangerous than White’s.
The bishop can’t be taken because of Ne4
27…Bc4 28. Qd4 d5! 29. exd5
29.e5 is bad in view of Ne4+.
29…Bxd5 and White resigned after black’s 41st move. Here is the rest of game in case you’re interested.
30.Rg1 Be4 31.Bd3 Qa5 32.Qb4 Qc7 33.Bxe4 a5 34.Qxb7 Qf4+ 35.Ke2 Rc7 36.Qb6 Nxe4 37.Qd4+ Kh7 38.c4 Rd7 39.Qe3 Ng3+ 40.Qxg3 Qxg3 41.Rxd7 Qe5+ 0-1
Would you like to dig out further on the same theme? Study the following games.