Louis Verhaard
The 467 (2008); eii solver
The only person the puzzle ever paid. His eii solver, released publicly because, in his words, he was stuck, found the 467 that won the $10,000 scrutiny prize, entered under his wife Anna Karlsson's name. His methods became canon: comb-search fill orders and depth-gated edge slipping. The 467 stood for twelve years.
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The engine behind the 467, the only Eternity II score ever paid, read from Louis Verhaard's own mailing-list posts: forward pruning, comb-search fill orders, depth-gated edge slipping, a Markov-tuned slip schedule. And why his own source-less Win32 binary cannot be built or run on this machine at all.
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.