Chess Board
[ECO code E48] Move Move Here
NIMZO-INDIAN DEF. - Rubinstein Sys.
(to) Rubinstein (& Samisch) Side Var.

White's QR3(a3)P attacked the QKt4(b4) bishop pin.
Black's dark QKt5(b4) Bishop wrongly removes White's QKt on QB6(c3) with check, but the exchange will favour White. B-Alt.
    White  Black	White  Black
 1. P-Q4   Kt-KB3    6.	PxP    PxP
 2. P-QB4  P-K3	     7.	P-QR3 BxKt ch?!
 3. Kt-QB3 B-Kt5
 4. P-K3   0-0
 5. B-Q3   P-Q4

WHITE to Move or Undo or Jump or Clear
 
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