Link each pair of numbers with a continuous line. Move horizontally or vertically through the cells. All cells in the grid must be used.

Rules of Play
★ Every number must be connected to its matching partner via an unbroken and unsplit path.
★ No path may cross another or double back on itself.
★ Every square on the grid must be filled with a color.

Features:
★ Monthly update puzzles
★ Multiple sizes, from 6x6 to 11x16
★ Tips

There is no foolproof logical way to solve this seemingly easy puzzle. Or, as Nikoli puts it, 'the puzzle requires inspired guessing and puzzling sense.'