The lab
The wiki's open notebook: structural findings and named search experiments, each credited to the researcher who ran it and reproducible from source. One corner of the community's wider research.
The editorial standard for this open notebook: how a piece of Eternity II research goes from unpublished work to a published page. What kind of contribution it is, whether it publishes, at what tier, and where it lives. One shared standard, built to scale to many authors.
The lab's named search experiments, one section per researcher. Each is a real run against Eternity II with its idea, its best board, and the questions it left open. Raphaël Anjou's notebook is here in full; the notebook is open to anyone else's.
Fifteen solvers, ours and our implementations of the community's two record backtrackers, each run once on ten corner-pinned variants of the official puzzle, single core, 60 seconds per run. The finding: node count is not score.
A notebook of Eternity II search experiments, organised into the shared engines they run on, the combination pipelines that chase the score, three studies that take one search paradigm apart a decision at a time, and exact endgame solves. Each has its idea, its best board, and the questions it left open. The best reaches 463 of 480.
Peter McGavin's own C backtracker, the fastest raw solver the community has measured. Fetched from the mailing list, built on an M1, and run on the real Eternity II. His code, his algorithm; run and written up here.
Joshua Blackwood's open-source C# solver, the one that found the standing 470 record. Built and run here as he published it, then with the five official clues pinned. His code, his algorithm; run and written up here.
Louis Verhaard's eii won the only prize the puzzle ever paid, but it shipped as a Windows binary with no source. What his method is, why the original will not run here, and where a faithful reimplementation of it lives.