[ECO code C24]
BISHOP OPG. (Berlin D.) to PETROFF DEF. (Italian V.)
White popularly transposes into a Petroff Defence line by developing a King's Knight to KB3(f3) to counter attack Black's KP and contest for Q4(d4). In reply Black may take White's KP to invite the Boden Gambit, or may adopt the Two Kts. Def. W-Alt.
White Black Transp.White Black 1. P-K4 P-K4 (1.) 2. B-B4 Kt-KB3 (2. Kt-KB3 Kt-KB3) 3. Kt-KB3!? (3. B-B4 )
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