[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "White to play and win"] [Black "?"] [Result "*"] [Annotator "peter"] [SetUp "1"] [FEN "8/8/8/5K2/7p/8/3N4/3B2bk w - - 0 1"] [PlyCount "11"] [SourceVersionDate "2020.04.01"] {[#]} {Study by Troitsky} 1. Bf3+ Kh2 2. Nf1+ Kh3 3. Bh1 {guarding g2 and setting up a mate} (3. Bb7 Bh2 4. Ke4 Kg2 $11 {the king escapes: bishop is needed on h1 to gaurd g2}) (3. Ke4 Bb6 4. Bh1 Kg4) 3... Bh2 {White was threatening Kf4 Kf3 and Bg2 mate, so Black prevents this} (3... Bb6 4. Kf4 Bc7+ 5. Kf3) 4. Ke4 {but now that the bishop is on h2 it drops if Black plays Kg4, so White can take this route to f3} Bb8 (4... Kg4 5. Nxh2+ $18) 5. Kf3 Bc7 6. Bg2# *