15:19

Just back from inside the box where the match is taking place, with both players and dozens of photographers, who are allowed inside for the first three minutes of play. A couple of things of note: there are a lot of photographers here, and one was told off after trying to get in front of the arbiter’s chair to get the best shots. Second, contrary to reports earlier in the championship of it being cold in there it was more like a greenhouse. Finally, and more importantly, I swear I saw Carlsen smile when Caruana played 3. Bb4 ... as if he had been expecting it. And of course he immediately flashed out 4. e4.