And now its all over

 After all the agonising about whether the 2021 World Championship match was going to see any decisive games, Carlsen wrapped it up with 4 wins over the last 6 games. Game 11 was Nepo's last chance to turn it around (or at least get something from the experience) but another tactical oversight left Carlsen with a winning position. He duly converted to reach the 7.5 points needed to retain his title. 

The second half collapse wasn't so much due to Nepo losing game 6, but his failure to bounce back in games 7 or 8. If he had been able to hold game 8 (instead of losing it) he might have still had a chance. Instead the blunder in game 8 (dropping a cold pawn) was somewhat reminiscent of Spassky's  blunders against Fischer in 1972, as was the final result (a 4 point winning margin). 

By the time he next defends the title Carlsen will have been World Champion for 10 years, which makes him 6 on the list of longest reigns (or 4th or 5th if you only count undisputed World Championships).

Nepomniachtchi,Ian (2782) - Carlsen,Magnus (2856) [C54]
FIDE World Chess Championship 2021 (11), 10.12.2021

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 d6 6. O-O a5 7. Re1 Ba7 8. Na3 h6 9. Nc2 O-O 10. Be3 Bxe3 11. Nxe3 Re8 12. a4 Be6 13. Bxe6 Rxe6 14. Qb3 b6 15. Rad1 Ne7 16. h3 Qd7 17. Nh2 Rd8 18. Nhg4 Nxg4 19. hxg4 d5 20. d4 exd4 21. exd5 Re4 22. Qc2 Rf4 23. g3 dxe3 24. gxf4 Qxg4+ 25. Kh1 Qh3+ 26. Kg1 Nf5 27. d6 Nh4 28. fxe3 Qg3+ 29. Kf1 Nf3 30. Qf2 Qh3+ 31. Qg2 Qxg2+ 32. Kxg2 Nxe1+ 33. Rxe1 Rxd6 34. Kf3 Rd2 35. Rb1 g6 36. b4 axb4 37. Rxb4 Ra2 38. Ke4 h5 39. Kd5 Rc2 40. Rb3 h4 41. Kc6 h3 42. Kxc7 h2 43. Rb1 Rxc3+ 44. Kxb6 Rb3+ 45. Rxb3 h1Q 46. a5 Qe4 47. Ka7 Qe7+ 48. Ka8 Kg7 49. Rb6 Qc5 0-1