The Colonel's Puzzles
… and Mr. Winkle, being greatly puzzled by their manifold windings and twistings, …
—Charles Dickens,
The Pickwick Papers
Geometric Cutout Puzzles
The Foxagon Puzzle.
With only four pieces, how hard can it be? . . . Heh heh heh.
The Hexicator Puzzle.
This one has nine pieces!
The Poolazoid Puzzle.
And this one has ten, all the same shape.
The Con Ed Puzzle.
This is another four-piece puzzle, and it's a good one to start with.
Triple Play Puzzle.
This pentomino puzzle was inspired by the start of baseball season.
Livio Puzzle.
This puzzle honors Livio Zucca, one of the great pioneers of recreational geometry.
2018 Puzzle.
A simple cutout puzzle with seven pieces.
N. W. D. Puzzle.
A similar cutout puzzle with nine pieces.
Twice As Nice Puzzle.
Four pieces, two easy puzzles in one.
Thrice
As Nice Puzzle.
A harder version of Twice As Nice.
Geometric 3D Puzzles
W's Dilemma.
Fit the 15 W-shaped pieces into the box.
The Telegraph Puzzle.
Join three identical pieces to make a prism.
Colonel's Bouquet.
Join any two of the four hexacubes to make a symmetric shape.
Colonel's Forest.
This is like Colonel's Bouquet but with one hexacube and three heptacubes.
Hide the Gold.
My most popular puzzle, and probably my prettiest!
Kaleidoscope Cube.
Fit nine nested symmetric pieces together to form a cube with a hole inside.
Wood's Hole
. Fit the six pieces together to form a cube.
Non-Geometric Puzzles
Crossword-Sudoku Puzzles.
First fill in the answers to the clues, then solve the sudoku.
Bottle Imp.
A puzzle about a popular card game.
Flotte Krabbe.
A puzzle about an old board game.
Miscellaneous Puzzles.
Solutions to Lewis Carroll's
Four Riddles.
Col. George Sicherman [
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