Chess Board
[ECO code D00]
TRANSPOSITION
QP. GAME (Mason Var.) to QGD (Harrwitz A.)
Black declined White's delayed QBP gambit and posted his KP on K3(e6), improving his QP support to deter an early exchange and freeing his KB.
White develops his Queen's Knight to QB3(c3), transposing into the (original) Harrwitz Attack.
    White  Black    Transp.White Black
 1. P-Q4   P-Q4		  (1.)
 2. B-B4   Kt-KB3   (2.	P-QB4  P-K3  )
 3. P-QB4  P-K3	    (3.	Kt-QB3 Kt-KB3)
 4. Kt-QB3	    (4.	B-B4	     )
Continue: Transpose or Undo or Jump or Clear