Tap two tiles to swap them. Arrange the 16 tiles to reveal a Celtic Knot design. The design consists of one or more loops of ribbon, possibly weaving over and under each other, with no loose ends.

• Easy to play, a challenge to solve.
• After you solve a puzzle just tap the board to start another.
• Use "Show Solution" if you get stuck.
• Use "Options" screen to select a puzzle or to change puzzle complexity.
• The registered game has millions of different puzzles to solve! The unregistered game has one puzzle for each difficulty level.
• How can 16 little tiles be so difficult to solve?