[Event "🐧🐤Basic Endgames by Jeffrey Ashton: King and Pawn vs. King Zugzwang +-"] [Site "https://lichess.org/study/k4NXJNzK/r0sncIL2"] [Result "*"] [Variant "Standard"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/jeffreyashton"] [FEN "4k3/8/8/8/8/8/4P3/4K3 w - - 0 1"] [SetUp "1"] [UTCDate "2019.09.07"] [UTCTime "17:29:51"] [Source "https://lichess.org/study/k4NXJNzK/r0sncIL2"] [Orientation "white"] 1. Kd2 Kd7 { [%cal Gd2d3] } 2. Kd3 { [%csl Gd4,Gd5,Gd6] } 2... Ke6 3. Ke4 { [%csl Ge5] } 3... Kd6 4. Kf5 { [%cal Gf5e6,Gf5e5,Gf5e4] } 4... Kd5 5. e4+ Kd6 6. Kf6 { [%cal Gf6e7,Gf6e6,Gf6e5] } 6... Kd7 7. e5 Ke8 8. Ke6 { [%csl Ge7] } 8... Kf8 9. Kd7 { [%csl Ge8,Ge7,Ge6][%cal Gd7e8,Gd7e7,Gd7e6] } 9... Kf7 { [%cal Ge5e6,Ge6e7,Ge7e8] } 10. e6+ Kf6 11. e7 Kf7 12. e8=Q+ Kf6 13. Qe4 { [%cal Ge4f6] } (13. Qh5 Kg7 14. Ke6 Kg8 15. Kf6 Kf8 16. Qf7#) 13... Kf7 14. Qe5 { [%cal Ge5f7] } 14... Kf8 15. Qe6 { [%cal Ge6f8] } 15... Kg7 16. Qf5 { [%cal Gf5g7] } 16... Kg8 17. Qf6 { [%cal Gf6g8] } 17... Kh7 18. Qg5 Kh8 19. Ke8 Kh7 20. Kf7 Kh8 21. Qg7# *