Chess Board
[ECO code C23] Move Move Here
(CLASSICAL) BISHOP'S OPG. - Philidor Var.
(to) Pratt Variation
Black advanced his base QP to the centre, freed his KB and counter-attacked Black's light bishop.
White's K5(e5) Pawn takes the knight on KB6(f6), opens the K-file and starts a piece exchange. W-Alt.
    White  Black	White  Black
 1. P-K4   P-K4	     6.	PxKt
 2. B-B4   B-B4
 3. P-QB3  Kt-KB3
 4. P-Q4   PxP
 5. P-K5   P-Q4
BLACK to Move or Undo or Jump or Clear
 
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