Chess Board
[ECO code D00]
QP. GAME - Blackmar-Diemer Gambit
Vienna Var. - Euwe Defence
White develops his King's Bishop to Q3(d3) to deter 7.Kt-K5 and enable short (i.e K-side) castling.
Black develops his Queen's Knight to QB3(c6) and attacks White's QP, planning 8.0-0..KtxP for equality.
    White  Black	White  Black
 1. P-Q4   P-Q4	     6.	B-KKt5 B-K2
 2. P-K4!? PxP	     7.	B-Q3   Kt-B3
 3. Kt-QB3 Kt-KB3
 4. P-B3   PxP
 5. KtxP   P-K3
Example ends: Undo or Jump or Clear