Chess Board
[ECO code A47]
QUEEN'S INDIAN DEF. - Colle System
White advances his KBPawn to KB4(f4) counter-attacking Black's knight on K5(e4) [or alternatively 11..BxR, 12.PxKt..B-R3, 13.PxKt..PxP].
Black's K5(e4) Knight returns to QB3(c6) and challenges White's QKt, for 12.R-K1..Q-B2 equality.
    White  Black     6.	0-0    Kt-B3
 1. P-Q4   Kt-KB3    7.	P-B3   B-K2
 2. Kt-KB3 P-QKt3    8.	P-K4   PxP
 3. P-K3   B-Kt2     9.	KtxP   Kt-K4
 4. QKt-Q2 P-K3	    10.	B-B2   B-R3
 5. B-Q3   P-B4	    11.	P-KB4  Kt-B3
Example ends: Undo or Jump or Clear