1. d2d4  1... g8f6  2. c1f4 [%c_effect f4;square;f4;type;Interesting;persistent;true] A poisonous version of the London System, often used by Erigaisi. 2... g7g6  3. b1c3 In the traditional London System this move is unthinkable, since it's the pawn that occupies this square. But they don't make London players like they used to—this variation was once the choice of those who wanted a solid position to make a draw, and nowadays it's used by people who like to play for mate. 3... d7d5 A principled move. 4. e2e3  4... f8g7  5. h2h4  5... h7h5 Stopping the advance of the h-pawn. 6. g1f3  6... c8g4 [%c_effect g4;square;g4;type;Inaccuracy;persistent;true] I'm not a big fan of this move, as the bishop isn't particularly well placed here and the f3 exchange can help White's attack by opening up the g-file. 7. d1d2 [%c_effect d2;square;d2;type;GreatFind;persistent;true] An unpleasant move, preparing to take the knight off f3. 7... g4f3 Necessary, to avoid 8.Ne5 or 8.Ng5. 8. g2f3  8... c7c6  9. e1c1  9... b8d7  10. e3e4 White's position is comfortable and easy to play. Black, on the other hand, has problems with his king, who has no safe haven. 10... e7e6  11. h1g1 A theoretical novelty that doesn't change the character of the game. 11... d7b6  12. c1b1  12... e8g8 A brave move, but it's not easy to recommend a safe path for the black king, as he's not happy on the queenside either. 13. f4g5  13... d8c7  14. f1d3  14... b6c4  15. d3c4 