Chess Board
[ECO code B15]
TRANSPOSITION
CARO-KANN DEF. to QP. GAME (Blackmar-Diemer G.)
Black developed his KKt to KB3(f6) attacking the White knight, rather than 4..Kt-Q2 or (usually) 4..B-B4.
White transposes into the inferior but lively O'Kelly variant of the Blackmar-Diemer Gambit Declined by setting his KBPawn to defend his knight. W-Alt.
    White  Black    Transp.White Black
 1. P-K4   P-QB3    (1.	P-Q4   P-Q4  )
 2. P-Q4   P-Q4	    (2.	P-K4!? PxP   )
 3. Kt-QB3 PxP	    (3.	Kt-QB3 Kt-KB3)
 4. KtxP   Kt-B3    (4.	P-B3   P-B3  )
 5. P-B3?!	    (5.	KtxP	     )
Continue: Transpose or Undo or Jump or Clear