1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g2g3  3... d7d5  4. g1f3  4... h7h6 A mysterious move that seeks a slightly different piece development than what we normally see against the Catalan Opening. 5. f1g2  5... f8d6 The bishop is developed on this unusual square, without Black needing to worry about the move Bc1-g5, if I understood correctly the idea of the move h7-h6.