Chess Board
[ECO code A40]
TRANSPOSITION
QP. GAME (Anglo-Slav Def.) to QGD. (Slav Def.)

White advanced his QBPawn as an alternative to facing a probable Caro-Kann Defence.
Black advances his QPawn to the centre, frees his QB and attacks White's undefended QBP, turning the game into a sound Queen's Gambit Declined, Slav Defence where ..P-QKt4 may enable him to take and keep the pawn.
    White  Black    Transp.White Black
 1. P-Q4   P-QB3    (2.	P-Q4  P-Q4 )
 2. P-QB4  P-Q4	    (1.	P-QB4 P-QB3)

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