1. g1f3  1... g8f6  2. c2c4  2... c7c5  3. b2b3 Carlsen is a player who can literally choose any opening variation. I believe it's the first time he plays this line. It takes great confidence and exceptional memory to do this, qualities he doesn’t lack. Among world champions, none can be compared to him in this versatility. Of elite players, only Ivanchuk manages a similar feat. 3... b8c6  4. c1b2 