Quadruples Sudoku by Bill Murphy
(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
Two complete rows are given in this Quadruples Sudoku. Can you use the white circles to get the rest of your ducks, or rather digits, in a row?

or solve online (using SudokuPad)
Theme: Angel Vision
Author/Opus: This is the 173rd 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). Numbers in white circles must appear in at least one of the four surrounding cells.
GAS Time Standards (highlight to view): Two party hats (🎩🥳): 6:30; One party hat (🥳): 12:00. All other solvers earn a 🦕: Sap Scansoriopteryx.
Thomas Hits the GAS (highlight to view): 2:18, 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.
