Chess Board
[ECO code D00] Move Move Move Here Move Here
QP. GAME - Blackmar-Diemer Gambit
Vienna Var. - Ryder Gambit

Black's Q5(d5) queen under B attack moved to QKt5(b4) attacking White's QKtP and pinning his QKt.
White castles long (ie. Q-side) to defend his QKtP and breaks the pin to gain a Rook on the open Q-file.
    White  Black	White  Black
 1. P-Q4   P-Q4	     6.	B-K3   Q-QKt5
 2. P-K4!? PxP	     7.	0-0-0
 3. Kt-QB3 Kt-KB3
 4. P-B3   PxP
 5. QxP?!  QxP

BLACK to Move or Undo or Jump or Clear
 
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