Modern Defense: Semi-Averbakh Variation

What Is The Semi-Averbakh Variation?

Qb6 queues up behind the c5 pawn against d4 and eyes b2, so White resolves the centre at once or invites you in. Push d5 and you get a Benoni structure where space belongs to White and you break with ...e6 or ...b5. Trade with dxc5 and you recapture with the queen, clearing the long diagonal and pointing the g7 bishop at b2.

The b2 pawn is bait rather than the plan: taking it costs you two or three moves while White develops with gain of time against the queen. Treat Qb6 as a tempo weapon: it forces the commitment, then the queen steps back to c7 once the structure is fixed. Games turn on whether White's space becomes a bind before your queenside breaks land.

How Do You Play Against The Modern Defense: Semi-Averbakh Variation?

No data covers this position, so this is the idea rather than a frequency. Black has developed the queen to b6 early, hitting b2 and d4 at once and asking you to commit a piece to defence before you have finished developing.

An early queen sortie gains a tempo now and loses two later, so defend once and then make the queen move again. Nc3 or Nb3 covers what needs covering, and after that every attack on the queen comes with development attached. The one thing to avoid is chasing the queen with pawn moves that loosen your own position, since that trades your structure for the tempo you were owed anyway.