SICILIAN DEFENSE, Taimanov variation (B46)

A clear intro, taken from wikipedia : The Taimanov Variation can be reached through 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 or 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6. Black develops the knight to a natural square and keeps his options open regarding the placement of his other pieces. One of the ideas of this system is to develop the king's bishop to b4 or c5. White can prevent this by 5.Nb5 d6, when 6.c4 leads to a version of the Maróczy Bind. 5.Nc3 is more common nowadays than 5.Nb5, when 5...d6 normally transposes to the Scheveningen Variation and 5...Nf6 is the Four Knights Variation. Independent moves for Black are 5...Qc7 and 5...a6, with the former being the more usual move order seen in recent years, as after 5...a6, the continuation 6.Nxc6 bxc6 7.Bd3 has given Black difficulties in reaching equality. Taimanov's idea was to play 5...a6 (preventing Nb5) followed by ...Nge7 and ...Nxd4.