Chess Board
[ECO code A47]
QUEEN'S INDIAN DEFENCE
Colle System
White's KB3(f3) Knight exchanges, taking the newly doubled QP to challenge Black's QKt.
Black's challenged QB3(c6) Knight moves to K4(e5) and threatens White's light bishop. Equality.
    White  Black	White  Black
 1. P-Q4   Kt-KB3    6.	0-0    Kt-B3
 2. Kt-KB3 P-QKt3    7.	P-B3   Q-B2
 3. P-K3   B-Kt2     8.	Q-K2   B-K2
 4. QKt-Q2 P-K3	     9.	P-K4   PxP
 5. B-Q3   P-B4	    10.	KtxP   Kt-K4
Example ends: Undo or Jump or Clear