Chess Board
[ECO code C26]
TRANSPOSITION
VIENNA GAME (Falkbeer V.) to PETROFF DEF. (3Kts)
Black's KKt threatened White's KP, for 3..P-Q4.
White transposes into the Russian Three Kts line of a Petroff (aka. the Vienna 3Kts.) by King's Knight development to attack Black's undefended KP rather than play the 3.P-B4 main. Black will often reply 3..Kt-QB3 for the Four Kts Game. W-Alt.
    White  Black    Transp.White Black
 1. P-K4   P-K4		  (1.)
 2. Kt-QB3 Kt-KB3   (2.	Kt-KB3 Kt-KB3)
 3. Kt-KB3	    (3.	Kt-QB3	     )
Continue: Transpose or Undo or Jump or Clear