Chess Board
[ECO code D31]
TRANSPOSITION
ORTHO-QGD. to NIMZO-INDIAN DEF. (Rubinstein S.)
White's king's pawn push out to K3(e3) freed his KB to defend his QBP, and supported his QP.
Black transposes into the Rubinstein System of the Nimzo-Indian Defence by developing his King's Knight to KB3(f6) fully controlling White's K4(e4).
    White  Black    Transp.White Black
 1. P-Q4   P-Q4	    (1.	P-Q4   Kt-KB3)
 2. P-QB4  P-K3	    (2.	P-QB4  P-K3  )
 3. Kt-QB3 B-Kt5    (3.	Kt-QB3 B-Kt5 )
 4. P-K3   Kt-KB3   (4.	P-K3   P-Q4  )
Continue: Transpose or Undo or Jump or Clear