M. Oskar van Deventer started designing puzzles in 1978, after reading the book Puzzles of the World. Since then,
he has invented, designed and built a few hundred different mechanical puzzles.
Some of his puzzles have been produced for the public, such as these:
Oskar lives in the Netherlands and is a telecommunications research engineer in his daily life. But for the puzzle collectors of the world, what Oskar dreams up for his next puzzle surprise is one of the most anticipated events each year.
- Oskar's Cubea hollow mechanical maze
- Oskar's Keys and Captive Keycast-metal mechanical challenges
- Mystery Shapesfour foam construction puzzles
- and, of course, Oskar's Diskstwo interlocking disks from Kadon Enterprises.