Aad van de Wetering:
Standard Pentomino Railways
Bruno Curfs:
Lights Out Revisited
Edo Timmermans:
The San Andreas Puzzle (2)
Edo Timmermans:
Instructions for making a cardboard Trinity Puzzle
Edo Timmermans:
Jigsaw Template 1
Edo Timmermans:
Jigsaw Template 2
Edo Timmermans:
Pythagorese Dissections
Edo Timmermans:
Solving the Enneomino Puzzle
Eduard Baumann:
Rubik-Sudoku
Eugène and Suzanne Neuzil:
Puzzles with 3 1/2-ominoes
Frank Tiex:
NKC Website Documentation
George Bell:
BurrTools polysphere files
George Bell:
The Pennyhedron Revisited (supplementary material)
George W. Hart:
Twenty Part Puzzle
Goh Pit Khiam:
The Design of N-ary Mechanical Puzzles
Markus Götz:
The Tetrahedral Ball Pyramid and its Structure
Pantazis Constantine Houlis:
Greek Puzzles and Enigmas: A Paradox?
Pieter Torbijn, Aad van de Wetering:
Tiling Squares with Two Different Pentominoes
Rik van Grol:
Virtual Rotational Puzzles
Ronald Kint-Bruynseels / Rob Hegge:
PuzzleWare - Burrtools (3)