Chess Board
[ECO codes A05/A15]
TRANSPOSITION
RETI OPG. (English V.) to ENGLISH OPG. (Symm. Var.)
White fianchettoed his KB to counter Black's QB influence on the long light diagonal, and enabled 0-0.
Black transposes towards the Hedgehog line of the English Opening by advancing a symmetrical QBPawn to QB4(c5) that deters 5.P-Q4. B-Alt.
    White  Black    Transp.White Black
 1. Kt-KB3 Kt-KB3   (1.	P-QB4  P-QB4 )
 2. P-B4   P-QKt3   (2.	Kt-KB3 Kt-KB3)
 3. P-KKt3 B-Kt2    (3.	P-KKt3 P-QKt3)
 4. B-Kt2  P-B4     (4.	B-Kt2  B-Kt2 )
Continue: Transpose or Undo or Jump or Clear