Outside Fortress Sudoku by clover!
(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
What happens when you try to build a fortress outside the grid? Find out in this puzzle where the gray cells must exceed the respective numbers to the top and left.
or solve online (using SudokuPad)
Theme: Out in the Cold
Author/Opus: This is the 119th puzzle from Clover, 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). Also, when a number appears in a gray cell, it must be greater than the clue number above its column and the clue number to the left of its row.
GAS Time Standards (highlight to view): Two party hats (🎩🥳): 6:30; One party hat (🥳): 12:00. All other solvers earn a 🦕: chilly Chilantaisaurus.
Thomas Hits the GAS (highlight to view): 1:50, 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.