Chess Board
[ECO code C42]
PETROFF DEFENCE - Damiano Var.
Side Variation
Black's queen on K2(e7) exchanged Kt-for-Kt on K4(e5), but risked becoming pinned.
White's K4(e4) Pawn takes Black's QP on Q5(d5) to win the pawn, with advantage. Best play continues 7..QxQ+ch, 8.BxQ rather than 7..Kt-Q2.
    White  Black	White  Black
 1. P-K4   P-K4	     5.	P-Q3   Q-K2
 2. Kt-KB3 Kt-KB3    6.	PxKt   QxKt
 3. KtxP   KtxP?!    7.	PxP
 4. Q-K2   P-Q4
Example ends: Undo or Jump or Clear