Chess Board
[ECO code D13 > D14] Move Move Here
SLAV DEFENCE
(The) Exchange Variation
White's QBPawn on QB4(c4) removed Black's QP on Q5(d5) and invited exchange capture.
Black's QB3(c6) Pawn takes the new doubled QP to set a fixed centre of mutually blocked pawns - a "main" route to the position since ECO coding.
     White   Black
 1.  P-Q4    P-Q4
 2.  P-QB4   P-QB3
 3.  Kt-KB3  Kt-KB3
 4.  PxP     PxP    Alt. 3WB,2WB route
WHITE to Move or Undo or Jump or Clear
 
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