Chess Board
[ECO code A15]
TRANSPOSITION
ENGLISH (Anglo-Indian D.) to RETI (Anglo-Indian D.)
White's KKt took control of the dark Q4+K5(d4+e5) centre to enable 3.P-Q4 without a forced 4.P-Q5.
Black transposes towards Catalan and Queen's Indian lines of Reti's Opg. by pushing his KPawn out to K3(e6), a popular move to support ..P-Q4 and free his KB for a potential 3.Kt-B3..B-Kt5 pin. White may transpose further by 3.P-Q4. B-Alt.
    White  Black    Transp.White Black
 1. P-QB4  Kt-KB3  (1.	Kt-KB3 Kt-KB3)
 2. Kt-KB3 P-K3    (2.	P-B4   P-K3  )
Continue: Transpose or Undo or Jump or Clear