A type of the Polish Defense occurring after 2. g3 b5 is an unorthodox, yet perfectly viable variation. White has played g2-g3, and is practically obliged to proceed at some point with Bg2; hence, the exposed b5-pawn can not be attacked as easily as in the line 1. d4 Nf6 2. Nf3 b5.
After the more common 2… b6, White can again transpose to the English opening with 3. c4 or to the Queen’s Pawn game with 3. d4. The game usually continues 3. Bg2 Bb7 4. O-O e6 5. d3, followed either by c2-c4, or Nbd2 with e2-e4.
We recommend 2. b3 for beginners. White’s plan includes Bb2, e2-e3 and c2-c4, with a small amount of theoretically important positions.
[Diagram: Black to Move] White’s last moves was 9. Bc3, intending to recapture with 10. Qxd2 on the next move, also defending the d4-pawn. If Black plays 9… Qb6, White will play another intermediate move 10. dxc5. So, what should Black do in the diagrammed position?
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