Oskar lives in the Netherlands and is a telecommunications research engineer who started designing puzzles in 1978 and has since designed some hundreds of different mechanical puzzles not least of which are the wonderful take apart type puzzles he's designed for Hanayama in recent years.
Oskar's talent is not just limited to disentanglement though, he's also very well know for wonderful maze puzzles, amazing twisty puzzles (details of the amazing 17x17x17 Guiness World Record holder here) and very complex interlocking burrs as well as many other puzzles you can even play online.
View some videos of Oskar's puzzles on YouTube or play online: a sliding block puzzle called ConSlide or go to Clickmazes for puzzling mazes to play online, all thanks to Oskars non-stop puzzle designing!
Oskar seen here visiting with us at IPP27 with another amazing puzzle designer Bill Cutler.
The puzzles is to try to separate the two H's that are locked together. As the name suggests this cast metal puzzle consists of two pieces shaped like the letter H.
Designed by Oskar van Deventer, and inspired by a gearing idea from Bram Cohen, the Gear Cube is a brand new concept in cube design using a full gear mechanism that requires twelve 90 degree turns to complete one rotation. The Gear Cube was awarded Meffert's Puzzle of the Year for 2010.
There are a number of challenges with this cube. - First to make a cube with a solid colour on each face like you would with a regular Rubik's Cube. - Another is getting the puzzle to a state where each face has only two colors (on opposite faces). This is a bit harder, but achievable for many people. - Hardest is solving the puzzle as a whole, which is still easier than the original Rubik’s Cube.
Multi-level Logic Game. Develops strategic planning, visual and spatial perception. 60 Challenges. 5 levels. Starter, Junior, Expert and Master.
Put your immune system to work and get rid of the virus before it can multiply itself.
Anti-virus is a sliding puzzle game with a new twist. Tiles that only slide diagonally and can move in groups! Once you "catch the bug" it's hard to put this game down.
Playing this game is a very tactile experience; the tile pieces are moulded such that they 'fit' your fingers very well. They also fit the game board which is moulded so the pieces fit exactly and force the diagonal moves. A quite addictive puzzle.
This puzzle has such a beautiful shape that it could easily be mistaken for a piece of jewelry. Its surface features extremely unusual cuts; actually, this marble is a puzzle that can be broken up into 4 pieces. This advanced design is the creation of Bram Cohen & Oskar van Deventner. If you succeed in breaking up the marble, carefully examine the surface of the sections of each piece. The theme of this puzzle is "Sphere."
Can you separate the three links of the chain and then get it back together again? What's special about this puzzle is that it can be solved three different ways, depending on which of the three pieces has been chosen as the middle link.
The object of this brilliant cast metal puzzle is to take the two interlocked loops apart and take them out of the surrounding planet like structure, then get the puzzle back together again. The puzzle was designed for Hanayama by Oskar van Deventner of The Netherlands and released in 2008.
There are two goals to the Cast Nutcase created by the Dutch puzzle inventor, Oskar van Deventner. 1. Remove the small nut by disassembling the Cast Nutcase. 2. Cast puzzle enthusiasts (some call them nutcases) can enjoy trying to change the wording on the bolt from "nut-case" to "case-nut".
Oskar van Deventer (inventor of Oskar’s Cube) designed this puzzle in Holland in 1985. He nearly always designs his puzzles in his head before completing detailed drawings for craftsmen to work from. He usually never makes the finished product himself.
This puzzle was originally made with 12 aluminium pieces but here MR PUZZLE has created a beautiful wooden version from Queensland Silver Ash.
The unusual pattern in which the 4 x 4 x 4 pieces are offset makes it an extremely difficult puzzle.
Mr Puzzle - We've got puzzles! 
Oskar lives in the Netherlands and is a telecommunications research engineer who started designing puzzles in 1978 and has since designed some hundreds of different mechanical puzzles not least of which are the wonderful take apart type puzzles he's designed for Hanayama in recent years. 
