Chess Board
[ECO code C66]
RUY LOPEZ - Closed Berlin Def.
Showalter Variation
White's endangered Q3(d3) Queen to QB4(c4) keeps up a KP defence and targets Black's KBP.
Black's light QB3(c6) Bishop under attack retreats to Q2(d7). Expect 11.P-QKt4 with slight White adv.
    White  Black	White  Black
 1. P-K4   P-K4	     6.	Kt-B3  B-K2
 2. Kt-KB3 Kt-QB3    7.	BxKt   BxB
 3. B-Kt5  Kt-B3     8.	Q-Q3   Kt-Q2
 4. 0-0    P-Q3	     9.	P-Q5   Kt-B4
 5. P-Q4   B-Q2	    10.	Q-B4   B-Q2
Example ends: Undo or Jump or Clear