The Sudoku puzzle format consists of (usually) a 9 by 9 grid that must be filled with numbers. The classical Sudoku rules are as follows

  1. Each row must contain all of the digits from 1 to 9, with no repetitions
  2. Each column must contain all of the digits from 1 to 9, with no repetitions
  3. Each sub square (3x3 grids marked by bold lines) must contain all of the digits from 1 to 9, with no repetitions

The historical inspiration of Sudoku begins with the Latin square, a type of grid problem similar to Sudoku in that it consists of an N by N grid where N digits (or letters) must be arranged in accordance with rules 1 and 2 of Sudoku (the sub square had yet to be invented). The first known example of a 9 by 9 Latin Square is from a monograph over 300 years ago, written by the Korean mathematician Choi Seok-Jeong. However, the Latin Square was popularized in the west by the legendary mathematician Leonhard Euler, who independently invented it almost 70 years after Choi Seok-Jeong.

According to Christian Boyer (idk who this is), on July 6th, 1895, the french newspaper La France published the earliest known example of a “true” Sudoku puzzle following all 3 rules of modern Sudokus, although french newspapers had previously been publishing similar (but different) puzzles prior. The name “Sudoku” itself (meaning “single digit”) comes from Japanese magazines in which the game was popular during the 80s and 90s.

In Modern times, the Sudoku puzzle scene has been blessed with the addition of numerous variants, that add on additional rules, elevating the puzzle. The puzzle in the provided image is one such example, known as the “miracle Sudoku”. It comes with 3 additional rules on top of the 3 original.

  1. If 2 digits are separated by a knight’s move in chess, then they cannot be the same
  2. If 2 digits are separated by a king’s move in chess, then they cannot be the same
  3. If 2 digits are adjacent (left, right, down or top, none of the diagonal directions), then they cannot be consecutive (ex - 5 and 6, or 7 and 8)

As can be seen from the fact that only 2 digits have been provided to start with, modern Sudoku authors are big fans of making puzzles that appear to be impossible to solve. This of course, is my favorite part about modern Sudoku. If you want to try to solve the miracle Sudoku, here is the link.

Some of the other example variants add new rules, such as German whispers, Dutch whispers, Renban lines, Entropy lines, Thermometer lines, killer cages and many more. You can find a massive collection of these puzzles on the logic-masters website.


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  • AshenWolf [she/her, kit/kit's]@hexbear.net
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    8 days ago

    This is how I felt going to pride, like I wasn’t actually apart of a group in certain ways, again. This tends to happen with me, but to experience that feeling via neurodivergence makes no sense. Why why why are they still doing things that so easily induce sensory overload? So many of us are autistic or otherwise neurodivergent. Why are we forcefully dragged to stalls, called at by corporate representatives as we walk by? Why does it feel like consumption is the only purpose. And this is responding to your other comment as well, but it all dissapears after it’s done. The bit of a feeling of community just died. So many people including me need more than that more than just one day a year, and none of us have it. I’m very upset with how pride tends to go, and how quickly everything gets dropped, and how closed off everything in society continues to be for disabled people, even in other marginalized spaces.

    Oh, and there were cops everywhere. Still going to go again next time, spending a day with people I care about is worth it to me (although I’m leaving around the time it officially starts)

    • AshenWolf [she/her, kit/kit's]@hexbear.net
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      8 days ago

      It could just be that the pride is a bad one, and I would believe that, it’s lib central and the lack of real lasting community probably contributes to the issues with the event as well.

    • lilypad [she/her, pup/pup's]@hexbear.net
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      8 days ago

      Why why why are they still doing things that so easily induce sensory overload? So many of us are autistic or otherwise neurodivergent.

      Ohmigosh this so much this why didnt this cross my mind. Its so hard to be around people in general, and then they want to add lights and loud music coming from every stall and people actively trying to grab my attention and so much so so much like i need to be at my most resourced and well defended in order to attend an event that is supposed to be for me?

      I wish there was like an ND friendly anti-selling-things pride, one that actually focuses on community building. No sponsers, no corpos, certainly no cops, just facilitating building genuine community connections. Pride should be an instance of organizing. Instead its mobilizing. No not even that, pride isnt even mobilizing, rather it feels like a feel good queer shopping mall, cause queers have money too now.