1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... f8c5  4. b1c3 One of the many possible ways to play the Italian Opening. Usually this square is reserved for the pawn, so that White can fight for the center with c3-d4, while the knight is maneuvered via d2 to f1 and g3. To make sense of the knight's positioning on c3, White must maneuver it to g3 via e2, place it on d5, or chase the black bishop with Na4 at some point. 4... g8f6  5. d2d3  5... e8g8  6. c1g5 The good old pin.