Playground for edge puzzle Eternity 2.
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Jul 3, 2023 - Python
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eternity2
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Eternity II looks like a children's jigsaw: 256 square pieces, match the colors. Launched in 2007 with a $2 million prize, it has never been solved: not by people, not by supercomputers. This site lets you feel why, right in your browser.
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Jul 20, 2026 - MDX
A low expectation attempt to resolve the unresolved yet puzzle Eternity II. Also a web-app that visualizes the Eternity II puzzle from a given input
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Jan 5, 2023 - TypeScript
Java implementation of a backtracker with some smart prunes for the Eternity II board game released in August 2007
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Dec 27, 2025 - Java
Solvers, records, and negative results for the never-solved gold challenge of the Diamond Dilemma (1988 prize puzzle): 142/160 tiles placed perfectly, 208/240 edges matched, and a documented map of every approach ( exhaustive C solver with CP-SAT oracle, large-neighbourhood optimizers,...)..
puzzle constraint-programming local-search combinatorial-optimization or-tools eternity2 unsolved cp-sat-or-tools edge-matching-puzzle eternity-ii
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Jul 20, 2026
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