Chess Board
[ECO code C68]
TRANSPOSITION
RUY LOPEZ (Exchange V.) to FOUR KTS (Rankin V.)
White's QKt deployment to QB3(c3) guarded his KP to enable 6.KtxP. Nowadays inferior to castling.
Black transposes into a Lopez Four Knights Game variation by developing his King's Knight to KB3(f6) counter-attacking White's KP. B-Alt.
    White  Black    Transp.White Black
 1. P-K4   P-K4		  (1.)
 2. Kt-KB3 Kt-QB3	  (2.)
 3. B-Kt5  P-QR3    (3.	Kt-B3  Kt-B3)
 4. BxKt!? QPxB	    (4.	B-Kt5  P-QR3)
 5. Kt-B3  Kt-B3    (5.	BxKt   QPxB )
Continue: Transpose or Undo or Jump or Clear