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After the exchange of pawns at d5 White must be mindful of  Black's Knight taking the
pawn at c3 and then Black pawn being pushed to b2. We prefer Knight to e3 (instead of
Bishop) at move 26. After the Knight recaptures it is pinned by the Bishop (cannot move
as the King would be in check). The Bishop's arrival on the battle field will be decisive.  
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