Chess Board
[ECO code C42]
TRANSPOSITION
PETROFF DEF. (Italian Var.) to TWO KNIGHTS DEF.
White's Q-Bishop attack on the Black king's current weak-point KB2(f7) is not immediately threatening.
Black often declines 3..KtxP to avoid its consequent Boden-Kieseritsky Gambit and develops his Queen's Knight to QB3(c6) to defend his KP, transposing into the milder Two Knights Def. B-Alt.
    White  Black    Transp.White Black
 1. P-K4   P-K4		  (1.)
 2. Kt-KB3 Kt-KB3   (2.	Kt-KB3 Kt-QB3)
 3. B-B4   Kt-B3    (3.	B-B4   Kt-B3 )
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