5...e5: Black takes the centre at once and accepts a hole on d5 in return for active pieces, the bishop pair and the ...f5 break. This is a advanced opening course for Black (ECO B33), written for players rated around 1900. Each move is explained and then drilled on a board; it is free.
Key ideas of Sicilian Sveshnikov
...e5 kicks the d4 knight before White's set-up is ready.
The d5 square is White's outpost; Black answers with ...b5, ...f5 and active bishops.
After Bxf6 gxf6 Black's doubled pawns control e5 and f5, and ...f5 opens lines.
Against knight retreats other than Ndb5 (Nf3, Nb3, Nde2), ...Bb4 or ...Bc5 develops with tempo.
The line trainer
The line trainer for Sicilian Sveshnikov has 50 lines that grow out of 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5, learned a few new ones a day with spaced-repetition review.
chessGM