Chess Board
[ECO code C41]
PHILIDOR'S DEFENCE - Kmoch Var.
Trap Variation
Black's queen withdrew from QKt7(b2) to QKt4(b5).
White's K6(e6) Knight to QB7(c7) forks K+Q+QR, to take the queen and prevent Black ever castling.
    White  Black	White  Black
 1. P-K4   P-K4	     7.	BxP ch! KtxB
 2. Kt-KB3 P-Q3	     8.	Kt-K6  Q-R4 ch
 3. P-Q4   Kt-Q2     9.	B-Q2   Q-Kt3
 4. B-QB4  P-QB3    10.	P-R5!  QxKtP
 5. Kt-Kt5 Kt-R3    11.	B-B3   Q-Kt4
 6. P-QR4! B-K2??   12.	Kt-B7 ch
Example ends: Undo or Jump or Clear