Chess Board
[ECO code E93]
KING'S INDIAN DEFENCE - Classical Var.
Petrosian System
White's KB3(f3) Knight to Q2(d2) supports his KP and sets his light B to attack Black's edge knight.
Black's KR4(h5) Knight under B attack moves to KB5(f4) threatening 12..KtxP+ch, with equality.
    White  Black     6.	B-K2   P-K4
 1. P-Q4   Kt-KB3    7.	P-Q5   QKt-Q2
 2. P-QB4  P-KKt3    8.	B-Kt5  P-KR3
 3. Kt-QB3 B-Kt2     9.	B-R4   P-KKt4
 4. P-K4   P-Q3	    10.	B-Kt3  Kt-R4
 5. Kt-B3  0-0	    11.	Kt-Q2  Kt-B4
Example ends: Undo or Jump or Clear