Oskar van Deventer created this take-apart puzzle. It's tough! I spent hours twisting the nuts back and forth.
One of my students brought the puzzle and asked: have you seen this? Yeah, and I can't solve it. Then he showed me.
People sometimes ask me what types of puzzles I collect. That's hard to answer, but I always start with: Oskar's puzzles!
Click here for the solution.
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