The Twelve Days of Sudoku #4 by Thomas Snyder

Sudoku by Thomas Snyder

PDF

or solve online (using our beta test of Penpa-Edit tools)

Author/Opus: This is the 538th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Sudoku rules.

Time Standards (highlight to view): Grandmaster = 3:30, Master = 6:30, Expert = 13:00

Solution: PDF and solving animation.

Note: Follow this link for other classic Sudoku. If you are new to this puzzle type, here are our easiest Sudoku to get started on. More Sudoku including variations can be found in these books in our e-store. Also, visit this page to purchase all of the puzzles from the 16th World Sudoku Championship including classic Sudoku.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our The Twelve Days of Sudoku Discussion post on the GMPuzzles Discord.

Note 3: Please check lesson notes from Dr. Sudoku.

  • skynet says:

    4:51. Smooth solve !

  • Gustavo says:

    I still don`t understand how the solver was able to find that 7 so early. Can someone comment on the process?

    • Avatar photo drsudoku says:

      (rot13.com)

      Gurer ner xrl yvzvgngvbaf pnhfrq ol qvtvgf frra va pbyhza bar, pbyhza avar, naq gur obggbz pragre obk.

      Va cnegvphyne, svir, fvk, naq frira unir whfg guerr cynprf gb tb va ebj frira.

      Ebj frira pbyhza gjb naq ebj frira pbyhza rvtug zhfg unir svir naq fvk zrnavat ebj frira pbyhza bar unf gur frira.

  • Gustavo says:

    (rot13.com)

    Gunax lbh sbe ercylvat!
    V thrff V jnf whfg n ovg guebja bss ol frrvat gur fbyire vachg gur frira va ebj frira pbyhza bar orsber abgvat gur svir-fvk cnve va ebj frira.

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