1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. g2g3  4... f8b4 One of the plausible ways to meet the Catalan. There is a very long list of strong GMs who have it in their repertoires. 5. b1d2 This move is a favorite of Dubov. White sacrifices a pawn in return for a strong center. 5... d5c4 