With all the many books and articles on the Sicilian Defense, there is surprisingly little about the Four Knights Variation. Its starting position is reached after 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6. It may also be reached after 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6. Some prefer 2...e6 to 2...Nc6 because it avoids 3.Bb5. The fundamentals of the Sicilian Four Knights are not hard to learn. Black reaches the middlegame quickly and safely, with lively piece play in the dynamic positions which arise. There is no easy ride for White here, and, in particular, if he gets over-ambitious, he can find himself on the receiving end of a powerful attack very quickly.