[%c_effect d4;square;d4;type;GreatFind;persistent;true] Black gains space and forces the white knight off the center.
1. g1f3  1... d7d5  2. e2e3  2... g8f6  3. c2c4  3... e7e6  4. b1c3  4... f8e7  5. b2b3  5... e8g8  6. g2g3 [%c_effect g3;square;g3;type;Inaccuracy;persistent;true] A little too creative. Black will exploit this move order and achieve an excellent position. 6... c7c5  7. f1g2 