Gaining the upper hand

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Avatar of texaspete

Puzzle from a game I just played.

White to move and gain the upper hand and win. This isn't mate.

Other moves for black are given in the move list. Moves 3 and 4 can probably be transposed, so apologies if this annoys you while doing the puzzle, but I had to include to demonstrate why the winning move works.

Avatar of Bokhtan33

The Knight takes the pawn on e6.

 

will at least give one pawn and raiding opportunities for the queen on blacks king.