When/Why does black do it? What kind of strategies should both sides adopt in such games? What kinds of games does it give rise to (i.e. positional or tactical)? Which players are well known practitioners of such a setup as black?
I found that the ECO B96 and B99 Sicilians include a line where Black castles long:
This is not a popular move, and probably not Black's best move.
Here are 3 Master games. Black fares poorly, earning 1/2 out of 3.
Spassky v Fischer, 1972. Fischer barely saves a dead lost position by finding a draw by repetition.
Pilgaard v Herrera, 2002 (white wins, the score isn't showing up)
Parimarjan v Krishnan, 2011
This game is interesting because, statistically,
Look how Black's
Black castling long in the Sicilian is a rare thing indeed. I can think of a few reasons:
So in general black only goes queenside if white has a full-force attack on the kingside and the center, and there is basically nowhere else to go.
I can think of one exception right now in the c3-Sicilian, where the queens are off the board and black can castle with check:
and lines similar to that.