My carefully assembled puzzle fell apart.

Unfortunately, its puzzles fall short.

In such a case, the puzzle will not fall apart, but a colored square would be gone.

How 3-D Puzzles Work As fun as they are, most traditional puzzles can fall a little flat.

If he is arguing for the literary value of the mystery, then the mere puzzle, a concoction whose characters perform in the service of an intriguing plot, must fall short.

"The puzzle falls into place almost perfectly," Mr. Koehler said.

Somehow the puzzle would fall together.

Sometimes saying things out loud is enough to make a puzzle magically fall together.

Both assembly and disassembly can be difficult - contrary to assembly puzzles, these puzzles usually do not just fall apart easily.