[%c_effect g4;square;g4;type;Inaccuracy;persistent;true] A thematic move in the English Opening but rare in this specific position. The computer isn't impressed, and the feeling is that this is a bad version of the g-pawn advance. It's important to highlight that the first chess player to try this move is the legendary grandmaster and World Champion Maia Chiburdanidze.
1. g1f3  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. d1b3  4... c7c5  5. a2a3  5... b4a5 