context: 1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... f8c5  4. c2c3  4... g8f6  5. d2d3  5... d7d6  6. c1g5  6... h7h6  7. g5h4  7... d8e7 A rare move that certainly caught Nepomniachtchi by surprise, since in just two moves his position becomes much inferior. The plans with a quick g7-g5 are more common. 8. b2b4 The beginning of a wrong plan.