Chess Board
[ECO code C29]
VIENNA GAME - Falkbeer Var.
Oxford Variation - (to Würtzburger Trap)
Black's KR5(h4) queen to KR4(h5) pinned the KKt.
White's QB3(c3) Knight removes Black's pawn on Q5(d5) for rook equality by 8..KtxR, 9.KtxP+ch..K-Q1, 10.KtxR (or 8..B-KKt5, 9.Kt-B4 lets White plan a trap). 
    White  Black	White  Black
 1. P-K4   P-K4	     6.	P-Kt3  KtxP
 2. Kt-QB3 Kt-KB3    7.	Kt-B3  Q-R4
 3. P-B4   P-Q4	     8.	KtxP
 4. BPxP   KtxP
 5. P-Q3   Q-R5 ch?!
Example ends: Undo or Jump or Clear