This move had already been played by Abdusattorov before.
1. c2c4  1... e7e6  2. b1c3  2... d7d5  3. d2d4  3... c7c6  4. e2e4 This variation is known as the \"Marshall Gambit.\" This is the only case of a player who has two excellent gambits named after him, one with White and one with Black. 4... d5e4  5. c3e4  5... f8b4  6. c1d2 The most critical move. 6... d8d4  7. d2b4  7... d4e4  8. f1e2  8... b8a6  9. b4d6  9... e4g2 