Questions tagged [sudoku]
A Sudoku is a puzzle consisting of a grid to be filled with symbols, such that each constraining unit contains each symbol exactly once. The typical example is a 9x9 square to be filled with the numbers 1 to 9, where the constraining units are rows, columns, and 3x3 blocks.
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A brain[expletive] sudoku
This is a Sudoku that is also a Brainfuck program.
The standard rules of Sudoku apply. The same symbol can not appear twice in the same row, column, or 3x3 box.
The grid should also form a functioning ...
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How to solve the attached sudoku?
Please explain the logic. I am not trying to solve it using trial and error or using any software. I am just looking for the next step. This sudoku is from apple 'Sudoku King' app.
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How could I solve the attached Sudoku?
Please explain the logic. I am not trying to solve it using trial and error or using any software. I am just looking for the next step. This sudoku is from apple 'Sudoku King' app.
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9x9 Sudoku Slitherlink Hybrid
I previously created a combined slitherlink and sukoku puzzle, but I was unsatisfied because the grid was smaller then a regular sudoku. So I made another, larger one.
Below is a 9 by 9 grid. This is ...
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Sudoku: Episode 64 - Attack of the Clones
An 8x8 Sudoku where you technically only have to figure out 32 cells! Twice Half the cells, double the clues!
Penpa Link
Rules
Normal Sudoku rules apply. Values are 1-8. Boxes are the 4x2 regions
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Sudoku + Slitherlink
I like combinations of puzzles, so I decided to combine a Sudoku and a Slitherlink.
Below is a 6 by 6 grid. This is filled in with numbers based on the usual rules of sudoku. All of the numbers from 1 ...
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A Somewhat Foolish Poem
Your task is to solve the Sudoku and complete the missing words in the following poem.
Classic Sudoku: Each row column and box contains the digits 1-9.
XV-rules: Digits separated by V must add to 5. ...
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Calculation Sudoku
Here is a new quiz from my daily quiz calendar. I'm trying to find a way to solve it.
The numbers 1-6 should be filled in. And like a sudoku, each row and each column should contain each number ...
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Next Move on this Sudoku Classic
What would be the next move?
Link to this sudoku
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Why is the next Sudoku step a 6?
I used a step-by-step Sudoku solver for a puzzle in which I was stuck.
However I don't understand how the next number (6) was found.
Sudoku puzzle where I was stuck:
Sudoku puzzle solved by one step ...
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Double sudoku - two-digit numbers, the 1s and 10s places both form Sudokus [closed]
Using distinct 2-digit numbers from 11-99 that have no zeros, fill in the grid so that the tens digits form a Sudoku and the units digits form a (different) Sudoku.
There might be a mathematical way ...
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Escape from Sudoku!
An entry in Fortnightly Topic Challenge #50: Escape Rooms
I hesitated to enter this in the Escape Room FTC, but I definitely was inspired by the challenge to create this puzzle, and it is, in some ...
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Chessdoku Level 1 (beginner)
I just tested out a new type of puzzle here (sorry if there's any confusion with the titling) called Chessdoku! Welcome to level 1. Here's the grid:
Your goal is to get one black and one white piece ...
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Chessdoku Level 0 (trial)
Welcome to Chessdoku! It's like Sudoku but chess! This is level 0, so it's a trial run and will be fairly simple to solve (level 1 has been posted here). This puzzle is just for the concept. Here you ...
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Trivia... sudoku
An entry in Fortnightly Topic Challenge #49: Pub Quiz Camouflage
Please do not search the answers online (hence the no-computers tag), otherwise it would be too simple to solve this puzzle. I tried ...
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Checking for cheating in a Sudoku puzzle?
I am writing a puzzling site at the moment, which will naturally include Sudoku. It struck me that there will be potential users that will try to cheat when solving puzzles. By cheat I mean that they ...
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Wanted: Sudoku data in CSV
I am a computer science student looking for unsolved sudoku games that are valid and available in a comma separated text file. Does such a prepared data set exist and where can I find such a data set? ...
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Pento-Doku: Pentominous + Sudoku
Intended for Fortnightly Topic Challenge #47: Wacky Sudokus, but I was too slow making it... not for lack of trying, I assure you
This puzzle is both* a Pentominous and a Sudoku**.
Rules
Solve the ...
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A Final Digitial Sudoku! - SS#14
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
Other puzzles in this series
Welcome to the final puzzle in this series! For more information about the series, see the first ...
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This Sudoku Park iS LIT!
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
The grid below is a normal Sudoku grid with normal Sudoku clues, but the completed grid also houses a Statue Park! The completed ...
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Sudoku: Odd Bonds
An entry in Fortnightly Topic Challenge #47: Wacky Sudokus.
Edit: Clarified three of the rules.
Rules:
Normal sudoku rules apply.
Inside the sudoku, there exists one "loop".
The loop ...
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A Fractal Sudoku - SS#13
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
Other puzzles in this series
Welcome to the penultimate puzzle in this series! For more information about the series, see the ...
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Sudoku with no grid and no numbers!!? - SS#12
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
Other puzzles in this series
Welcome to the twelfth puzzle in this series! For more information about the series, see the first ...
- 60.6k
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Sudoku in Technicolor!
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
This puzzle consists of three overlapping Sudokus, coloured red, blue and green, so each cell will contain three digits, one of ...
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10X10 Sudoku with a specific requirement
Let's have a 10x10 grid. We want to create a Sudoku in which, in each row, the pairs (a+b), (c+d), (e+f), (g+h), (i+j) add to one of the following numbers: 7, 9, 11, 13, or 15. Can you construct a ...
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This Sudoku takes a step up! - SS#11
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
Other puzzles in this series
Welcome to the eleventh puzzle in this series! For more information about the series, see the first ...
- 60.6k
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Didn't you ask me for a crossword?
An entry in Fortnightly Topic Challenge #forty-seven: "Wacky Sudokus"
Here's that crossword you asked for... Sorry, what's that - you didn't ask me for a crossword??
TASK: Solve the puzzle ...
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Skyscrapers in Sudoku!!! - SS#10
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
Other puzzles in this series
Welcome to the tenth puzzle in this series! For more information about the series, see the first ...
- 60.6k
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A Puzzling Sudoku (Warning: Hot!)
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
A Sudoku with an oddly familiar shape. Here's a Penpa Link.
Rules:
Normal Sudoku rules apply
(Special) Thermometers:
The ...
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A 7x7 Suguru - SS#9
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
Other puzzles in this series
Welcome to the ninth puzzle in this series! For more information about the series, see the first ...
- 60.6k
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The Blank Sudoku
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
(h/t to Beastly Gerbil, whose 1,2,3... Trinary!!! puzzle provided inspiration for this puzzle)
This puzzle is a normal Sudoku, ...
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A Difficult Wacky Sudoku - SS#8
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
Other puzzles in this series
Welcome to the eighth puzzle in this series! For more information about the series, see the first ...
- 60.6k
12
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A Scrumptious Sudoku Sandwich - SS#7
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
Other puzzles in this series
Welcome to the seventh puzzle in this series! For more information about the series, see the first ...
- 60.6k
11
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Sudoku... with 10 digits? SS#6
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
Other puzzles in this series
Welcome to the sixth puzzle in this series! For more information about the series, see the first ...
- 60.6k
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Compoundoku wants REALLY BIG and WACKY!
This is an entry for Fortnightly Topic Challenge #47: Wacky Sudokus.
Rules of Compoundoku:
Solve both left and right Sudokus.
In addition, the board below them is the Compound Board of both Sudokus.
...
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A Mosaic Sudoku - SS#5
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
Other puzzles in this series
Welcome to the fifth puzzle in this series! For more information about the series, see the first ...
- 60.6k
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1
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Sudoku + Nurikabe = Sudokabe
The following Sudoku has a nice little twist: after solving, use the numbers in the green squares as a basis for a Nurikabe puzzle. You can create a new grid for the Nurikabe (a 9x9 grid with the ...
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This is an Odd Sudoku - SS#4
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
Other puzzles in this series
Welcome to the fourth puzzle in this series! For more information about the series, see the first ...
- 60.6k
9
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1
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256
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Shattered Webs - SS#3
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
Other puzzles in this series
Welcome to the third puzzle in this series! For more information about the series, see the first ...
- 60.6k
10
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2
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1, 2, 3... Trinary!!! (SS#2)
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
Other puzzles in this series
Welcome to the second puzzle in this suduko series! For more information about the series, see the ...
- 60.6k
14
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The Blind Killer - a new series! SS#1
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
Other puzzles in this series
Welcome to a new sudoku series! This series will run for the duration of the current Fortnightly ...
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If 2020 Were A Sudoku
A bit of light relief to round out the year. No special genius required :-)
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A sudoku that's already filled in for you
The usual rules of sudoku apply: each row and column must have one of each digit; plus, if you divide the whole nine-by-nine grid into nine three-by-three subgrids, then each subgrid has one of each ...
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Sudoku - less than 6 and knight's move
In the following sudoku, the numbers on the outside indicate the first number less than 6 seen in that row/column. In addition, a number in the sudoku cannot be a knight's move from an identical ...
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The First No L Sudoku
Normal Sudoku rules apply. In addition no L-shaped tetromino can contain four consecutive digits (for instance you can't have r2c9=5,r4c9=8). The little killer clue indicates cells on the indicated ...
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Less than 6 Sudoku
In the following sudoku the numbers on the borders indicate the first number less than 6 seen in that row/column. So for example, the 4 at the bottom means that the first number less than 6 seen from ...
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Sjudoku II - A greater challenge in the world where 9 is 7
This is more difficult instance of a puzzle posted here.
Rules similar to Sudoku applies:
In each disk, the numbers 1,2,...7 should appear exactly once.
No line may contain duplicate digits (note ...
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Tackling The Triptych
Normal Sudoku rules apply. Numbers on thermometers must increase, starting from the bulb end. Killer clues indicate the sum of three digits in a cage, which cannot include repeated digits. In columns ...
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Sjudoku - in a world where 9 is replaced by 7
Sjudoku (sju = seven in Swedish).
Rules similar to Sudoku applies:
In each disk, the numbers 1,2,...7 should appear exactly once.
No line may contain duplicate digits (note that there are lines in 3
...
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2
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An experimental sudoku
(Here is an experimental Sudoku created by me, however, the "box" constraint is not originally mine, but it'd be fun to try out this constraint.)
Rules:
Normal Sudoku rules apply.
...
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