Once again Carlsen tried an offbeat opening line (1.e4 e5 2.Bc4), which posed little problems for Caruana. At move 15 Carlsen then played a piece sacrifice, but when the smoke cleared, Caruana had a comfortable advantage. He maintined this edge simply aiming his pieces at the white king, and while looking for counter play, Carlsen played the wrong move in a line he previously calculated, and lost a few moves later.
The win by Caruana leaves him 1.5 points clear after only 3 rounds. Aronian and Vachier-Lagrave are on 1.5 points, while Carlsen, Nakamura and Topalov are all back on 1.
Carlsen,Magnus (2877) - Caruana,Fabiano (2801) [C24]
2nd Sinquefield Cup 2014 Saint Louis USA (3.1), 29.08.2014