Chess Board
[ECO code C42]
PETROFF DEFENCE - Damiano Var.
Trap Variation
Black wrongly withdrew his Q5(d4) knight (under combined attack) away from the Q-file.
White's immediate K5(e5) Knight advance on to QB6(c6) gives discovered check, and White will gain Black's queen for a knight.
    White  Black	White  Black
 1. P-K4   P-K4      5.	P-Q3   Kt-KB3??
 2. Kt-KB3 Kt-KB3    6.	Kt-B6 dis.ch!
 3. KtxP   KtxP?!
 4. Q-K2   P-Q4
Example ends: Undo or Jump or Clear