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From Sudoku Theory
- ...e are 4 essentially different puzzles, found initially by [[ryokousha]], [[rangsk]], and [[Philip Newman]] (PN below). An exhaustive search using a [[Gauntle ...solution count is 18, found by PN and ryokousha; this has been verified by rangsk.71 KB (11,891 words) - 06:51, 15 May 2025
