Chess Board
[ECO code C44]
TRANSPOSITION
PONZIANI OPG. (Counter-G.) to RUY LOPEZ (Siesta V.)
Black's QRPawn push attacks White's light bishop.
White transposes by withdrawing his QKt5(b5) Bishop to QR4(a4) keeping the pin on Black's QKt.
    White  Black    Transp.White Black
 1. P-K4   P-K4		  (1.)
 2. Kt-KB3 Kt-QB3	  (2.)
 3. P-B3   P-B4!?   (3.	B-Kt5  P-QR3)
 4. P-Q4   P-Q3	    (4.	B-R4   P-Q3 )
 5. KPxP   BxP	    (5.	P-B3   P-B4 )
 6. B-QKt5 P-QR3    (6.	PxP    BxP  )
 7. B-R4	    (7.	P-Q4!	    )
Continue: Transpose or Undo or Jump or Clear