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White wins in 15 moves.
In this problem by Troitsky, the key is to confine the black king in the squares a1 and b1, and bring the white king to support mate. (But you have to avoid the statemate).
Cue the 'Nice n' easy'
hmm........ the exact same thing maybe.
Not maybe.The same thing exactly happens.
Very nice problem Pau. I'm collecting your endgame puzzles if you don't mind
now I learned that thanks