Chess Board
[ECO code D15] Move Move Here
SLAV DEFENCE - Side Var.
The Exchange Variation (alt. route)
White responds to Black's erroneous 4..B-B4 with a QB4(c4) Pawn capture of Black's QP on Q5(d5), inviting exchange.
Black's QB3(c6) Pawn takes the new doubled QP to set a fixed centre of mutually blocked pawns.
    White  Black	White  Black
 1. P-Q4   P-Q4	     5.	PxP    PxP
 2. P-QB4  P-QB3
 3. Kt-KB3 Kt-B3
 4. Kt-B3  B-B4?!  Main 5WB,4WB route
WHITE to Move or Undo or Jump or Clear
 
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