Looking through some of the games from the recently completed O2C Doeberl Cup, I came across the following quick win by GM Anton Smirnov over Willis Lo. On move 17 Lo chose not to castle, and connected his rooks with Kf7. A few moves later his position started to get worse and it all fell apart by move 27. At least to my eyes, Lo would have done better to castle on move 17, although weirdly, after 18.Qd3, Kf7 would have been played anyway. The difference may be that by having a rook on f8 instead of h8, Black might have been in a position to defend the kingside a little better.
Doeberl Cup Premier chess24.com (3.4), 02.04.2021
1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Bg5 h6 5. Bh4 Qb6 6. Nc3 e6 7. Qd2 Nc6 8. e3 Bd6 9. Bd3 Bd7 10. Nge2 Nge7 11. Bg3 Bxg3 12. hxg3 Rc8 13. Rc1 Na5 14. b3 Qb4 15. g4 f6 16. Bb1 Kf7 17. Nf4 b6 18. O-O Rc7 19. Nd3 Qd6 20. e4 Ng6 21. e5 Qf8 22. f4 Ne7 23. f5 exf5 24. gxf5 Nxf5 25. exf6 gxf6 26. Ne5+ fxe5 27. Bxf5 1-0
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