Dr. Sudoku Prescribes #1 – Sudoku

Sudoku by Thomas Snyder


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

Theme: Countdown to 2013 – this theme is primarily visual, unlike Dr. Sudoku’s earlier Countdown sudoku theme here.

Rules: Standard Sudoku rules.

Answer String: Enter the 3rd column from top to bottom, followed by a comma, followed by the 7th column from top to bottom.

Time Standard: Sudoku Master = 2:10, Expert = 6:30, Novice = 21:00

Solution: PDF

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 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.

  • Ravi says:

    Happy New Year Dr. Sudoku 🙂
    Nice puzzle, took 14 min to solve.


  • György says:

    Nice puzzle, some (small) tricks was need to solve (9 min).
    Happy new year, and I wish you success about this site 🙂

    • Avatar photo drsudoku says:

      Awesome. That beats my own retesting time, but I was mentally shutting off pointing pairs and above while solving it.

  • Fred76 says:

    2’14… missed 4 seconds to be a “sudoku master”, haha !
    I look forward to see what’s coming on this new blog.

  • Rishi Puri says:

    2:45 … looks like I’m falling behind 🙂 nice puzzle and looking forward to more. Good luck with your new site Thomas.

  • Tiit Vunk says:

    I really like the idea to tell how much it takes for different kind of solvers and your evaluation seems pretty accurate – how ever you do that. Even better is to compare your result afterwards. Some other day it might take more time, but today it took 1:48 for me.

    • Avatar photo drsudoku says:

      Several testers, and experience. I’m sure I won’t always be spot on for every solver every time since there is sometimes luck involved, but I hope to give a better indication of how much time a person should set aside for the puzzles.

  • greenhorn says:

    Really nice easy classic. It took me 1:47 to fill in the marked columns and 15 more seconds to finnish the whole puzzle. But I don´t consider myself to be “sudoku master”. Otherwise Happy New Year to everybody!

  • skynet says:


  • Ours brun says:

    1:29 on this first puzzle. Quite satisfied, I must say.
    Setting up time standards is an interesting idea that may certainly prove entertaining as well as encouraging for novice and intermediate players. I wish this good initiative reaches its goal!

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