Chess Board
[ECO code C48]
TRANSPOSITION
LOPEZ 4KTS GAME to RUY LOPEZ (Steinitz Def.)
White's forceful queen's pawn advance to the centre freed his QB and attacked Black's KP.
Black reaches the (Old) Steinitz Defence by developing his Q-Bishop to Q2(d7) halving the pin.
    White  Black    Transp.White Black
 1. P-K4   P-K4		  (1.)
 2. Kt-KB3 Kt-QB3	  (2.)
 3. Kt-B3  Kt-B3    (3.	B-Kt5  P-Q3 )
 4. B-Kt5  P-Q3	    (4.	P-Q4   B-Q2 )
 5. P-Q4   B-Q2	    (5.	Kt-B3  Kt-B3)
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