1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4 The Nimzo-Indian is an essential part of almost every top player's repertoire. 4. g1f3  4... e8g8  5. a2a3  5... b4c3  6. b2c3  6... c7c5  7. g2g3  7... b7b6  8. f1g2  8... c8b7  9. d4d5 Tabatabaei occupies as much space as he can before his pawns stall. 9... d7d6 So is placing his pawns on the opposite color of the bishop he is left with, a classical strategy in the Nimzo-Indian. 10. e1g1  10... d8e7  11. f3h4  11... b8d7 All these logical developing moves have been seen before and Black now starts to threaten concretely the more exposed of the doubled c-pawns. 12. f1e1 Tabatabaei decided not to defend it, with a novelty $1 12... d7e5 So principally accepts the pawn. 13. e2e4  13... e5c4 