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.
  • 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 pieces to make a symmetric shape.
  • 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 [ HOME | MAIL ]