Chess Board
[ECO code C61]
RUY LOPEZ
Bird Defence
White's Bishop under attack retreated to QB4(c4).
Black, planning ..Kt-KB3, pushes his rear doubled QPawn out to Q3(d6) to prevent a White P-K5 and frees his QB, with only slight inequality. B-Alt.
    White  Black	White  Black
 1. P-K4   P-K4	     6.	P-Q3   P-QB3
 2. Kt-KB3 Kt-QB3    7.	B-QB4  P-Q3!
 3. B-Kt5  Kt-Q5
 4. KtxKt  PxKt
 5. 0-0	   B-B4!
Example ends: Undo or Jump or Clear