Played after three minutes of thought. Megabase attributes an ominous score to this move: zero percent.
1. e2e4  1... e7e5  2. f1c4  2... g8f6  3. d2d3  3... f8c5  4. b1c3  4... d7d6  5. f2f4 Back to Romanticism. 5... b8c6  6. g1f3  6... f6g4 A very risky choice by the former world champion.  Three other moves are more common. 7. f3g5 Nepomniachtchi is in an adventurous mood as well.