[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "White to play and win"] [Black "?"] [Result "*"] [Annotator "peter"] [SetUp "1"] [FEN "k7/p7/N2n4/8/8/7B/5K2/8 w - - 0 1"] [PlyCount "19"] [SourceVersionDate "2020.04.01"] {[#]} {This is a classic staircase puzzle} 1. Bg2+ Nb7 2. Kf3 Nd6 {moving the knight to a5 or d8 does not change anything} 3. Kf4+ {Ke3 is equally good} Nb7 4. Ke4 Nd6+ 5. Ke5+ (5. Kd4+ {is also fine}) 5... Nb7 6. Kd5 Nd8 7. Kd6+ (7. Kc5+) 7... Nb7+ 8. Kc6 Na5+ 9. Kc7+ Nb7 10. Bxb7# *