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 fourpiece 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, a great pioneer of recreational geometry.
N. W. D. Puzzle.
A custom cutout puzzle with nine pieces.
The Martian Diamond.
Fit the six spaceships onto the diamond.
Twice As Nice Puzzle.
Four pieces, two easy puzzles in one.
Thrice
As Nice Puzzle.
A harder version of Twice As Nice.
Angel Wings.
Seven symmetry puzzles in one.
Super Taco Chips.
Seventyseven puzzles in one.
Snowfall.
A covering puzzle inspired by nostalgia for my days in Buffalo.
Shardinaires9™.
Kadon's versatile set of nine pieces.
Balancing Act I and Balancing Act II.
Two symmetry puzzles, simple but not so easy.
Corner the Market.
Your stock will rise if you solve it!
Entourage.
A simple enclosure puzzle.
2023 Puzzle.
A cutout puzzle with seven pieces to honor the new year.
Geometric 3D Puzzles
W's Dilemma.
Fit the 15 Wshaped 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.
A 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.
Triple Check
. Fit 12 checkered solid pentominoes together to make each of three shapes.
Cover Up
. My second hiding puzzle, and an easy one to play with.
The Blue Bird of Happiness
. My third hiding puzzle, and an easy one to solve.
Stable Boy
. A miniature antislide puzzle in the style of Vladimir Krasnoukhov.
Box of Ziti
. A new wrinkle on pentacube box puzzles.
Fraternal Twins
. A symmetry puzzle with just two pieces, exactly alike.
Clog Dance
. An antislide puzzle that uses polyiamonds instead of polyominoes.
Cubey Doo, Where Are You?
Arrange six pieces to form a cube.
NonGeometric Puzzles
CrosswordSudoku 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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