While Viswanathan Anand's Kan Sicilian is in the shop, he decided to go back to 1...e5 and the Berlin Defense. In game 2 Magnus Carlsen this with 4.d3 and went on to win a nice game, but this time decided to enter the famous ending. The players followed a trendy line, with the first officially new move occurring on move 25. That began the game, and three short moves later Anand found an idea that dictated the game's character for the next 50 moves or so. Anand began a combination that resulted in an ending where Carlsen had a rook, knight and two pawns against Black's rook and four compact pawns, with all the pawns on the queenside.
White's fundamental idea was to put a pawn on c4, the knight on d5 and put the rook on the 7th rank, and if he could achieve that without Black doing anything special in reply he would most likely win (whether Black went for a rook swap or not), but achieving that setup wasn't at all easy. It took Carlsen a long time to legitimately threaten it, and once he was about ready to put that plan into action Anand started pushing his queenside pawns and advancing his king in search of counterplay. It wasn't easy, but Anand calculated everything correctly and managed to liquidate all of White's pawns by move 77, reaching an ending with rook and two pawns vs. Carlsen's rook and knight. Carlsen wasn't yet ready to call it a day, and while he eventually picked up both of Black's pawns Anand had no trouble holding the resulting ending, which has been known since forever to be a theoretical draw. Carlsen finally gave up the ghost and allowed the rooks to be traded, "unfortunately" finishing the game two moves before tying the old record for world championship games. (The record for moves, that is; the record for time is just about impossible to break under current time controls.)
Carlsen thus continues to lead the world championship match with a 4-3 score; Anand will have the white pieces tomorrow. Meanwhile, the game, with my brief notes, can be replayed here. (Subscribers to my match coverage will get more detailed coverage later tonight.)