Paircraft is a browser adaptation of Dominosa from Simon Tatham’s Portable Puzzle Collection. Original C generator and independent logical solver generated and validated fifteen puzzles. Pair uniqueness and full adjacent-cell coverage rules translated to JavaScript; new static DOM/CSS interface. No Play Store graphics used. Source: https://github.com/chrisboyle/sgtpuzzles/blob/d1e10eb57dd80af4999e698a9ab31f546e9a0b9d/app/src/main/jni/dominosa.c MIT license: LICENSE.txt. Repository 746 stars observed 2026-10-26. No backend, remote gameplay assets, authentication, popups or downloads.