Chess Board
[ECO code B58]
SICILIAN DEFENCE - Orthodox Var.
Boleslavsky Defence (Var. A)
White's knight under KP attack on Q4(d4) returned to KB3(f3), losing him a tempo.
Black pushes his King's Rook's Pawn out one square to prevent 8.Kt-KKt5(g5).
    White  Black	White  Black
 1. P-K4   P-QB4     6.	B-K2   P-K4
 2. Kt-KB3 P-Q3	     7.	Kt-B3  P-KR3
 3. P-Q4   PxP
 4. KtxP   Kt-KB3
 5. Kt-QB3 Kt-B3
Example ends: Undo or Jump or Clear