[Event "Attacking chess: Attacking the king that has lost the right to castle"]
[Site "https://lichess.org/study/z5GW7Sc1/8AdBUJ5o"]
[Result "*"]
[Variant "Standard"]
[ECO "B20"]
[Opening "Sicilian Defense: Lasker-Dunne Attack"]
[Annotator "https://lichess.org/@/realhercules"]
[UTCDate "2020.04.29"]
[UTCTime "03:08:57"]
[Source "https://lichess.org/study/z5GW7Sc1/8AdBUJ5o"]
[Orientation "white"]
1. e4 c5 2. g3 g6 3. Bg2 Bg7 4. Ne2 Nc6 5. c3 Nf6 6. Na3? d5 7. exd5 Nxd5 8. Nc2 O-O 9. d4 cxd4 10. cxd4 Bg4 11. f3 Bf5 12. Ne3 { [%csl Ga5][%cal Gd8a5] } 12... Qa5+ { The king is forces to move out of his position (1st attack) } 13. Kf2 { Unavoidable since if } (13. Bd2 Nxe3 14. Bxa5 Nxd1 { and Black wins a piece; this also happens after 13.Qd2 Nxe3 14.Qxa5 Nxg2+ etc. }) 13... Ndb4 14. Nxf5 Qxf5 15. g4 Nd3+ { The second act starts: the king has to move again. White decides on 16.Kg3? a weak move, but even after the stronger.Black retains the advantage with 16...Qb5. } 16. Kg3? Nxd4! 17. gxf5 Nxf5+ 18. Kg4 h5+ 19. Kg5 Bf6# *