(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
“We adore chaos because we love to produce order.” — M.C. Escher | Use high, medium, and low numbers to restore order to this Entropy Sudoku.

PDF

or solve online (using SudokuPad)

Theme: Ordered Entropy

Author/Opus: This is the 112nd puzzle from Philip Newman, part of the Genuinely Approachable Sudoku (GAS) team.

Rules: Standard Sudoku rules (insert a number from 1 to 9 into each cell so that no number repeats in any row, column, or bold region). Additionally, each 2×2 set of cells in the grid (including those sets that cross region boundaries) must contain at least one low number {1, 2, 3}, at least one medium number {4, 5, 6}, and at least one high number {7, 8, 9}. (For example, R34C34 could contain 1677 but not 2378 since there is no medium number in 2378.)

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 8:30; One party hat (🥳): 18:00. All other solvers earn a 🦕: Chaotic Cardiodon.

Thomas Hits the GAS (highlight to view): 5:40, with SudokuPad replay file shared as a download for now (requires loading via settings menu with improvements expected before people should use this regularly).

Solution: PDF; solving video with explanation to be added later from GAS team.

Note: Follow this link for other less common variations of Sudoku.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Daily GAS discussion post on the GMPuzzles Discord. Not a member of the Discord? Click this link for basic access.