comment: [%c_effect g5;square;g5;type;GreatFind;persistent;true][%c_highlight d8;keyPressed;none;opacity;0.8;square;d8;persistent;false,g5;keyPressed;none;opacity;0.8;square;g5;persistent;false] An excellent move to disrupt Black's harmonious development.
context: 1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g2g3  3... c7c5 Taking the game into the Benoni Defense is more fun and risky than the normal Catalan Opening lines resulting from 3...d5. 4. d4d5  4... e6d5  5. c4d5  5... d7d6  6. b1c3  6... g7g6  7. f1g2  7... f8g7  8. g1f3  8... e8g8  9. e1g1  9... f8e8 The main position of the Benoni Defense with g3. 10. c1f4 Historically 12.Nd2 is the main move, but it has lost some popularity recently. 10... c8f5 One of several possible lines. I particularly like 10...h6 with the idea of playing g6-g5, leading to a sharp position. 11. f3h4 This is the problem of developing a bishop on f5 when you have a pawn on g6; the piece has to move on the same diagonal. 11... f5c8  12. f1e1  12... f6g4 Maneuvering the knight to e5 is a well-known positional idea in the Benoni. 13. h4f3  13... b8d7 