Chess Board
[ECO code A04]
TRANSPOSITION
RETI OPG. ("QKt" Def.) to ENGLISH OPG. (Nimzo. V.)
White continued to avoid the centre, advancing his QBPawn to QB4(c4) to contest for Q5(d5) control.
Black transposes into the Nimzowitsch line of the English Opg. by advancing his King's Pawn to the centre, freeing his KB and taking (temporary) control of White's Q4(d4).
    White  Black    Transp.White Black
 1. Kt-KB3 Kt-QB3   (1.	P-QB4  P-K4  )
 2. P-B4   P-K4	    (2.	Kt-KB3 Kt-QB3)
Continue: Transpose or Undo or Jump or Clear