[Event "10 Elementary Fortresses: Fortress 4"]
[Site "https://lichess.org/study/sUF6Ik0A/uXJXuPpd"]
[Result "*"]
[Variant "Standard"]
[ECO "?"]
[Opening "?"]
[Annotator "https://lichess.org/@/Vagerhook"]
[FEN "6k1/7p/8/6KP/3B4/8/8/8 w - - 0 1"]
[SetUp "1"]
[UTCDate "2020.04.17"]
[UTCTime "21:25:57"]
[Source "https://lichess.org/study/sUF6Ik0A/uXJXuPpd"]
[Orientation "white"]
1. h6?? { After the unfortunate h6, the position becomes a fortress for black. } (1. Kh6 { was easily winning. } 1... Kf7 2. Kxh7 { [%cal Gh5h8] } 2... Kf8 3. Kg6 Kg8 4. h6 Kf8 5. h7 Ke7 6. h8=Q) 1... Kf8 2. Kf6 Kg8 3. Be5 Kh8?? (3... Kf8 $10) 4. Kf7# *