Fivetress Sudoku by Bill Murphy
(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
You may have solved some Fortress Sudoku, but have you ever solved a Fivetress? In this variant, digits in gray cells must be at least 2 greater than those in orthogonally adjacent white cells.
or solve online (using SudokuPad)
Author/Opus: This is the 168th puzzle from Bill Murphy, 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). A number in a gray cell must be at least 2 greater than any number in an adjacent white cell that shares an edge. (To assist solvers, this is shown like a greater than/less than shape in how the gray cells are drawn.)
GAS Time Standards (highlight to view): Two party hats (🎩🥳): 7:00; One party hat (🥳): 13:00. All other solvers earn 🦕: One More Than Fabrosaurus.
Thomas Hits the GAS (highlight to view): 2:58, 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
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.