1. c2c4  1... e7e5  2. b1c3  2... g8f6  3. g1f3  3... b8c6  4. g2g3  4... d7d5  5. c4d5  5... f6d5  6. f1g2  6... d5f6 This interesting and less common move was played by Svidler in the World Cup. 7. b2b4 I could only find two games with this move, but one of them was Nepomniachtchi-Carlsen, so both players know the position. 7... f8d6 This natural move is already a novelty. 8. b4b5 