1. e2e4  1... c7c5  2. g1f3  2... b8c6  3. f1b5  3... g7g6  4. e1g1  4... f8g7  5. f1e1  5... c6d4 A rare move. 5...Nf6 and 5...e5 are the main lines. 6. f3d4  6... c5d4  7. c2c3 [%c_effect c3;square;c3;type;GreatFind;persistent;true] White must remove the d4-pawn to develop his pieces to active squares.