He declined to defend it because he disagreed with the way FIDE was organizing and managing the tournament. I believe this is around the time they threw him out of a tournament for wearing jeans, when he was not the only competitor present in jeans.
I think it's nearly universally accepted that his streak ended on a technicality rather than a legitimate decline/defeat.
I think it's more that he wanted to go out undefeated, rather than lacking motivation. Or rather the former driving the latter.
He made 5 title defenses. Two were against the previous generation of players, and he did extremely well. 2 were against players of his generation and were anything but compelling victories. He only won a total of 1 classical game in the 24 played, and that was in a must-win scenario because he had just lost for a final record in these matches of +1 -1 =22. And finally there was his match against Nepo which was looking to be another extremely close match until Nepo lost a critical game, and then went on monkey tilt, as is his reputation - proceeding to play horribly for the rest of the match and get wiped.
In an interview with Rogan, Carlsen stated he felt he peaked a bit before his match against Nepo, and so he probably did not view his chances of success in a world championship match as especially high. So he was going to have to spend months preparing for a match he could very well lose which would certainly tarnish his reputation as the GOAT of chess. I think this is why he couldn't find the motivation.
For instance there were new world records just around the corner. The most successful world title defenses is 6 and that was back in the early 20th century. With one more he could have surpassed Kasparov and at least tied the record.
Magnus has always been unhappy with the format of the WCC cycle. He first skipped it in 2011, when he was already the top-rated player but not yet champion (https://www.chess.com/news/view/carlsen-quits-world-champion...), and very nearly skipped it again in 2013.
Actually he recently stated that he IS still disappointed about that whole incident because nothing changed and is currently backing up hikaru on drama around similar issues.
The motivation issues can stem from poor management :)
From what I recall, he automatically lost that one game but was not thrown out of the tournament. Eventually he just stopped playing the world championship altogether, which is when he lost his title.
I don't really follow human chess, but I wonder what the new nr 1 player thought of themselves after essentially becoming the "best player in the world who doesn't wear jeans." Must be so frustrating to know there is something left to achieve but your league's shenanigans will prevent you from achieving it in an official and prestigious manner.
The jean controversy was a couple of years after Magnus stopped defending the title. It has nothing to do with it. Magnus just doesn't care about the format of the world title.
I think something broke for him while playing Caruana in 2018. The classical games were a snooze fest of defensive plays after defensive plays and everything was settled in the rapid tie break in a fairly unsatisfying manner.
He is not the first to complain about that by the way. Fischer hated the format too.
The freestyle championship was better in pretty much every way.
There was no snooze fest though in 2018 WCC. The games were extremely exciting, with unbalanced pawn structures. They all ended in draws only because of their strong defensive skills and a touch of luck in a few games.
Unbalanced pawn structure is a feature of the Sveshnikov Sicilian but Caruana had done a lot of prep and it was obvious. Carlsen quicky left the main line for the boring 7. Nd5. Plus, Carlsen missed a lot of good moves because he had to play it safe. To me, it was boring chess of the highest level.
A lot of it felt like watching engines by proxy. One prepared well on a very complex opening. The other found the best meta counterplay and held until he reached the tie break.
Game 12 is a travesty. It was clear he just wanted to move to rapid.
You are clearly confused.
1. It was Magnus who played Sveshnikov, and Fabi who played the 7. Nd5 line.
2. 7. Nd5 line is not boring, it's one of the sharpest things to play against Svehsnikov, with pawns marching on both sides of the board. Mainline Sveshnikov on the other hand can be very drawish, with maneuvering play, where no side has a pawn break in sight.
3. It was the beginning of the Leela era, with many new opening concepts. It was a short-lived golden age, with players excited to try new ideas. After this match Magnus had a second peak, incorporating new knowledge, and won quite a lot of sharp games in Sveshnikov.
4. Well, game 12 was interesting, but EV of extra time to relax and prepare for rapid games with Caruana in 2018 was quite high. Fabi wasn't a very good rapid/blitz player back then.
5. Carlsen-Nepo WCC was a massacre, while the games were quite boring, except a few at the beginning. That match or any of the next matches would be a much better example for a case against classical chess.
I myself quite like chess960, and it's clearly the right direction. Opening prep is absurd now, especially at super GM level.
But that's it. There was no win because the opportunity to even compete was taken away. Imagine you train your whole life and finally win the Olympic Gold medal, but everyone knows it's only because the true nr 1 ignored to compete in this format.
Winning a title is never about facing the greatest possible opponent. Even the people who show up aren’t at their absolute best, but consider everyone who doesn’t devote their lives to the sport. The greatest potential chess player of all time likely does something else with their lives.
Without prep Magnus would be vastly less likely to win, and he’s not doing the prep because he’s not competing. How exactly is that different than someone not devoting themselves to the sport 20 years ago?
I make no claims about what’s going on in people’s heads here just the underlying reality.
I was pissed I didn’t go to nationals in high school largely because I got no sleep the night before due to a crappy hotel stay. Losing a close game to board 1 while trying to stay awake sucked, but I was hardly the only person off my game, so that’s just how things workout.
This is plain wrong for anybody that has been actually following chess.
He said like a year before declining that he would only defend against Alireza because he was the younger generation. Nobody believed him, Alireza didn't win the Candidates and he said "no thanks" and then everybody was surprised pikachu.
The Jean thing was way later and in an unrelated event.
I think it's nearly universally accepted that his streak ended on a technicality rather than a legitimate decline/defeat.