Chess Board
[ECO code C25] Move Move Here
VIENNA GAMBIT
The Hamppe-Allgaier Gambit

Black's KKtP moved up to attack White's KKt.
White's KB3(f3) Knight move to KKt5(g5) enables 7.KtxBP to fork Q+KR for 8.P-Q4 - an offer (Kt-for-P, in return for faster development) like the Allgaier but named after Hamppe as he popularised the Vienna.
    White  Black	White  Black
 1. P-K4   P-K4	     5.	P-KR4  P-Kt5
 2. Kt-QB3 Kt-QB3    6.	Kt-KKt5!?
 3. P-B4   PxP
 4. Kt-B3  P-KKt4  Transp.from Allgaier

BLACK to Move or Undo or Jump or Clear
 
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