Multi-car Pileup by Dr. Sudoku
(This post is part of: “A Story of Self-setting Sudoku”.)
Our testing was fine in a single country, like the US where Sudoku originated. But when we considered the rules of the road in Japan, and then the unusual spacing initially seen in Britain too, everything got messed up. Single systems are not useful. We’ll need to think about at least two, maybe three at a time to get to ASI.
or solve online (using SudokuPad)
Author/Opus: This is 5th puzzle from “Dr. Sudoku”, our AI-powered puzzle engine pushing the limits of sudoku intelligence.
Rules: Insert a number from 1 to 9 into each white cell so that no number repeats in any row, column, or bold region.
Difficulty (highlight to view): 4 stars
Time Standards (highlight to view): Grandmaster = 7:30, Master = 12:30, Expert = 25:00
Solution: PDF
Note: Follow this link for classic Sudoku. If you are new to this puzzle type, here are our easiest Sudoku to get started on. More classic Sudoku puzzles can be found in The Art of Sudoku, The Art of Sudoku 2 and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.
Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Twelve Months of Sudoku? post on the GMPuzzles Discord. Not a member of the Discord? Click this link for basic access.