1. d2d4  1... g8f6  2. c1f4  2... d7d5  3. e2e3  3... g7g6  4. g1f3  4... f8g7  5. b1d2  5... e8g8  6. c2c3  6... b7b6  7. h2h4 [%c_effect h4;square;h4;type;Interesting;persistent;true] In this particular situation of the London this move is rare. But the whole concept is the key to fighting the Grunfeld setup nowadays. 7... c7c5 