Chess Board
[ECO code C60]
RUY LOPEZ TRANSPOSITION
COZIO DEF. to COZIO DEF. DEFERRED

Black's QRP push attacked White's light bishop.
White transposes into a Cozio Deferred line by retreating his threatened Bishop from QKt5(b5) to QR4(a4), ready to withdraw entirely if 5..P-QKt4.
    White  Black    Transp.White Black
 1. P-K4   P-K4		  (1.)
 2. Kt-KB3 Kt-QB3	  (2.)
 3. B-Kt5  KKt-K2   (3.	B-Kt5  P-QR3 )
 4. Kt-B3  P-QR3    (4.	B-R4   KKt-K2)
 5. B-R4	    (5.	Kt-B3	     )

Continue: Transpose or Undo or Jump or Clear