Chess Opening Theory/1. e4/1...a6/2. d4/2...b5/3. c4/3...Bb7/4. Nc3/4...b4/5. Qb3

= St. George Defence/Three Pawns Attack = In this position, the pawn cannot take the knight as 6. Qxb7 would be deadly. Two options are offered to black according to the former author, but only one is alright:


 * /5...Ra7/ protects the bishop, allowing the pawn to take the knight, but hangs the pawn. Therefore, 5...Ra7 is out.
 * /5...Nc6/ is a good move, defending the b pawn and attacking the now undefended d pawn.

Theory table
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1.e4 a6 2.d4 b5 3.c4 Bb7 4. Nc3 b4 5. Qb3