White to play - Win

The diagram for Position 273 has the Black knight on e8 and notes that it could be on any of a8, b7, a6, b5, a4, b3, a2, c2, a1, b1, d1, f1, or h1. White also wins with the knight on e4 as shown here.

White mates in 4 against any Black moves with 1.Nc8 2.Ne7(+) 3.Nd8 4.Nf7#

Analysis using computer generated endgame tablebases

Uncorrected as position #553 in the Benko edition