[%c_effect g4;square;g4;type;Interesting;persistent;true] In a recent interview, Aronian praised Chess960, and I suppose one of the things he likes is the possibility of creating exotic ideas in the opening because he is one of the most creative players of the modern chess era. Here he goes for an attack even with the king in the center and pieces without development, but the idea is more interesting in practice than the words describing it. Of course, there are good alternatives available.
1. c2c4 [%c_effect c4;square;c4;type;GreatFind;persistent;true] Interestingly, in this round everyone played the same first move. Chess960 has some peculiarities, such as the possibility of creating a strong threat right from the start of the game: here Black needs to defend the h7-pawn. Another curious phenomenon is the development of opening theory in this modality: it's fun to see the opening in the other games, since we don't have databases showing us what the most common opening moves are. Everything is a discovery. 1... h8g6  2. f2f4 Making way for the queen, a necessary step sooner or later. White can also start by opening the other bishop's diagonal with 2.b3. 2... c7c5  3. e2e3  3... b7b6  4. b2b3 Here Black has a choice. 4... f7f6 4...f5, 4...e6 and 4...d5 all look very logical. 5. f1f2 White also has plenty of moves. Moving one of the knights is possible. 5... f8f7 