Chess Board
[ECO code C01] Move Move Move Here Move Here
FRENCH DEF. - Diemer-Duhm Gambit Decl.
Tarrasch Defence
White's Queen's Bishop's Pawn removes Black's QP on Q5(d5) and attacks his KP, inviting exchange.
Black usually recoups with his King's Pawn (likely to result in an isolated queen's pawn or IQP but freeing his QB and gaining active play for his pieces).
	White   Black
 1.	P-K4    P-K3
 2.	P-Q4    P-Q4
 3.	P-QB4	P-QB4
 4.	BPxP	KPxP
WHITE to Move or Undo or Jump or Clear
 
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