Jigsaw puzzle as we know it today first appeared in the late 18th
century. A jigsaw puzzle is a tiling puzzle that requires the
assembly of numerous small, oddly shaped interlocking pieces.
Each piece has a small part of a picture on it; when complete,
a jigsaw puzzle produces a complete picture.
The contemporary puzzles include jigsaw, Rubik's Cube™, Solitaire,
Tetris and many other.
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