Chess Board
[ECO code A43]
TRANSPOSITION
(OLD) BENONI DEF. to BENKO GAMBIT (Deferred)
Black's QKtP advanced to meet a likely 4.P-QB4.
White's QBPawn advances to QB4(c4), doubles his QP support, challenges Black's QKtP and transposes into the deferred Benko Gambit - the order of play in Rubinstein-Spielmann, Vienna 1922.
    White  Black    Transp.White Black
 1. P-Q4   P-QB4    (1.	P-Q4   Kt-KB3)
 2. P-Q5   Kt-KB3   (2.	P-QB4  P-B4  )
 3. Kt-KB3 P-QKt4   (3.	P-Q5   P-QKt4)
 4. P-B4!	    (4.	Kt-KB3	     )
Continue: Transpose or Undo or Jump or Clear