Chess Board
[ECO code D00]
QP. GAME - Blackmar-Diemer Gambit
Ryder Gambit - (The) Side Variation
White castled long (ie. Q-side) to defend his QKtP and broke the pin to gain a rook on the open Q-file.
Black develops his Queen's Bishop to KKt5(g4) to pin White's Q+QR, but White has a winning attack by 8.Kt-QKt5 (ie. 9.KtxBP++mate or 9.QxKtP). B-Alt.
    White  Black	White  Black
 1. P-Q4   P-Q4	     5. QxP?!  QxP
 2. P-K4!? PxP	     6.	B-K3   Q-QKt5
 3. Kt-QB3 Kt-KB3    7.	0-0-0  B-Kt5??
 4. P-B3   PxP
Example ends: Undo or Jump or Clear