Chess Board
[ECO code B21]
SICILIAN TRANSPOSITION
PHILIDOR VAR. to GRAND PRIX ATTACK
White develops his Queen's Knight to QB3(c3) to support his KP and take control of White's Q4(d5).
Black develops his own Queen's Knight to QB3(c6) to counteract White's KKt, transposing.
    White  Black    Transp.White Black
 1. P-K4   P-QB4	  (1.)
 2. P-KB4  P-KKt3   (2.	Kt-QB3 Kt-QB3)
 3. Kt-KB3 B-Kt2    (3.	P-B4   P-KKt3)
 4. Kt-B3  Kt-QB3   (4.	Kt-B3  B-Kt2 )
Continue: Transpose or Undo or Jump or Clear