(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
Today it is clover! bringing a twist on Sudoku where some regions can’t have very many different values. Can you work around all these “open windows”?

PDF

or solve online (using SudokuPad)

Theme: Passing Open Windows

Author/Opus: This is the 103rd 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. Each shaded 3×3 region contains exactly four distinct numbers.

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 6:00; One party hat (🥳): 11:00. All other solvers earn a 🦕: queenly Quaesitosaurus.

Thomas Hits the GAS (highlight to view): 1:33, 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.