Chess Board
[ECO code C77]
RUY LOPEZ TRANSPOSITION
WORMALD ATTACK to WORRALL ATTACK
Black's KB move enabled castling while his Q-side position threatened to trap White's light bishop.
White castles, transposing attack lines. W-Alt.
    White  Black    Transp.White Black
 1. P-K4   P-K4		  (1.)
 2. Kt-KB3 Kt-QB3	  (2.)
 3. B-Kt5  P-QR3	  (3.)
 4. B-R4   Kt-B3	  (4.)
 5. Q-K2   P-QKt4   (5.	0-0   B-K2  )
 6. B-Kt3  B-K2	    (6.	Q-K2  P-QKt4)
 7. 0-0		    (7. B-Kt3	    )
Continue: Transpose or Undo or Jump or Clear