Chess Board
[ECO code C65]
RUY LOPEZ - Berlin Defence
"Centre" Variation
White castles to avoid his king's-side development being upset by an otherwise likely 6..KtxBP.
Black pushes his QRPawn out to QR3(a6) to attack and dislodge White's light bishop. Tends to equality.
    White  Black	White  Black
 1. P-K4   P-K4	     5.	P-K5   Kt-K5
 2. Kt-KB3 Kt-QB3    6.	0-0    P-QR3
 3. B-Kt5  Kt-B3
 4. P-Q4   PxP
Example ends: Undo or Jump or Clear