Your pawn stakes the very center and opens lines for your own bishop and queen; the fight for the middle starts even, move one.

His knight attacks your center pawn, so a knight of your own steps out to guard it; a defensive job done by a developing move.

The little pawn asks his bishop the eternal question early; the ark's walls start with this nudge.

The pawn shores the center and quietly digs the ark's moat; his bishop's retreat squares are being fenced off.

One safe square left for the bishop: exactly where you want it.

Your bishop's pawn needs a clear lane.

Now the file is clear for the pawn march.

Queen has to move; pawn one step from walling the bishop in.

Bishop has nowhere to go.