GoKawiilEngineer uses Google's OR-Tools CP-SAT solver to crack 3D-printed corn puzzle
An engineer at Recurse Center tried to solve a 3D-printed physical puzzle where corn-kernel-shaped pieces must slide into a grooved cob without gaps or overlaps. After manually attempting it, they asked Claude to write a solving script, which required some back-and-forth to correct piece shapes via computer vision. Rather than implementing recursive backtracking as expected, Claude's script imported Google's OR-Tools CP-SAT constraint solver library to find a solution.
GoKawiil's interpretation of the reporting above, not reported fact.
The anecdote illustrates how AI coding assistants can default to reaching for existing specialized tools like constraint solvers rather than writing algorithms from scratch, potentially producing more efficient solutions than a human's first instinct. This suggests that pairing AI assistants with mature open-source libraries could change how programmers approach classic combinatorial problems, favoring off-the-shelf industrial tools over textbook algorithms like backtracking.
- A puzzle-solving script written by Claude used Google's OR-Tools CP-SAT solver instead of manual backtracking.
- Computer vision limitations required manual clarification of some puzzle piece shapes before solving.
- The example highlights how AI assistants may default to existing optimization libraries rather than custom algorithms.
Corn Cob 3D Puzzle Brain Teaser — This is basically the exact style of physical puzzle the article describes solving with CP-SAT - a satisfying tactile brainteaser where oddly-shaped pieces must interlock perfectly. Great for anyone who wants to try the human backtracking algorithm before letting a solver do it for them.
See Corn Cob 3D Puzzle Brain Teaser on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: thill.me — Patrick'S Blog, 2026-09-27
Published there as: “Solving a corn puzzle with CP-SAT”
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