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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Sudoku variants where key rules are the same as in classic Sudoku
Maybe it's just my impression, but I noticed that solving Sudoku variants often has very little to do with solving classic Sudoku puzzles. You need to use the extra restrictions introduced in the ...
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A colourful Colombian Sudoku
Fill the sudoku on the left so that each column, row, 3x3 box, and cells of the same color contain the numbers 1 to 9. The dots show how many numbers in the row or column of the grid on the right ...
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Bulls and Cows meet Sudoku!
This is a Colombian Jigsaw Sudoku where the usual rules apply, but with irregular boxes. The dots in the right-hand scheme indicate how many of the numbers in a particular row or column are correctly ...
- 541
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What's the one digit you can fill in this partially hidden Sudoku?
A few weeks ago, I challenged some people to solve the puzzle I made. Two of them took it more or less seriously, but couldn't find the right solution. Now they are excited to see whether or not ...
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When in Rome... – a deconstruction sudoku
This is part 63 of the puzzle series Around the World in Many Days. Each part is solvable on its own.
Dear Puzzling,
This is a sudoku deconstruction puzzle. Draw eight non-overlapping rectangular ...
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What is the number of essentially different solutions for a 3Doku?
The 3Doku is a Sudoku-like puzzle with blocks of 4×4 cells on the faces of a cube. Instead of columns and rows, it has bands of cells that loop around the cube.
It has me wondering how many ...
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Minimally clued 2x3 Sudoku
Beginner puzzleThis puzzle is intended to be suitable for people who are new to puzzle solving. However, both experienced solvers and new solvers are welcome to post solutions to this puzzle.
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A final Colombian Sudoku... for the time being
This too is a Colombian Sudoku by Xavier Castillo. The usual rules apply.
The dots outside the board on top indicate how many cells in the corresponding column or row of that board contain precisely ...
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A Difficult Colombian Sudoku?
This Colombian Sudoku is by Xavier Castillo. Usual Sudoku rules apply. Additionally, digits on each of the two diagonals must all be different.
The dots outside the board above indicate how many cells ...
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A Crabby Sudoku
I present a *deep breath* Even-Odd TetroThermoDoku. From the back of the name to the front:
Rules
Sudoku: Fill each cell with a digit 1-9 such that no number repeats in any row, column, or 3x3 heavy-...
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Product = Sum Sudoku (Royal Statistical Society Christmas Quiz 2023)
Normal Sudoku rules for this grid size apply. The product of the numbers on each pink diagonal equals the sum of the numbers in the blue square.
This puzzle is from the now closed contest at: https:/...
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Continue with sudoku - how do I scan for next steps?
I filled some cells, but am stuck here. I cannot go any further.
How do I advance? How would I scan the Sudoku to recognize next steps?
I've taken the puzzle from https://play.google.com/store/apps/...
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Is the 7-clue 6x6 Sudoku solvable?
So I was trying to find an 8-clue 6x6 Sudoku because I knew from this paper that only 8 clues were needed to create a 6x6 Sudoku with a unique solution.
However, I have managed to find one with 7 ...
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An Irregular Colombian Sudoku
Solve the Irregular Sudoku below (by Xavier Castillo), where the usual rules apply.
The dots outside the board on top indicate how many cells in the corresponding column or row of that board contain ...
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Mercury in Centigrade
This is part 55 of the puzzle series Around the World in Many Days. Each part is solvable on its own.
Dear Puzzling,
This is a non-consecutive thermo sudoku. Fill the grid so that each row, column ...
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