Chess Board
[ECO code C44]
TRANSPOSITION
SCOTCH GAME (Side V.) to RUY LOPEZ (Steinitz Def.)
Black's 3..P-Q3?! freed his QB - a poor move typical of inexperienced players (correct being 3..PxP).
White develops his King's Bishop to QKt5(b5), pins Black's QKt and enables castling. Much inferior to 4.PxP as it restores options for Black. W-Alt.
    White  Black    Transp.White Black
 1. P-K4   P-K4		  (1.)
 2. Kt-KB3 Kt-QB3	  (2.)
 3. P-Q4   P-Q3?!   (3.	B-Kt5  P-Q3)
 4. B-Kt5?!	    (4.	P-Q4	   )
Continue: Transpose or Undo or Jump or Clear