Questions tagged [grid-deduction]
Puzzles such as Sudoku or Kakuro, where the final state of a pre-existing grid must be deduced logically through clues placed within and/or around the grid. Use with the [logical-deduction] tag. For puzzles where you are given a list of clues which can be used to compose a grid to solve them logically, use the [logic-grid] tag instead.
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Tombs of Ancients
This is part 68 of the puzzle series Around the World in Many Days. Each part is solvable on its own.
Dear Puzzling,
The top grid here is a Yin-yang puzzle. Shade some cells in the grid so that ...
- 78.5k
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What should the next step be in this Kakuro puzzle?
I have recently been learning more and more tricks for solving Kakuro puzzles, but I'm at a loss for how to solve the final bit of this puzzle. For reference, it is from the "Real Kakuro" ...
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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 ...
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Going around in circles
Solve the grid. Then solve the grid again.
The answer can be one or two letters long.
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Nonconsecutive Anti-Knight Fillomino?
Rules of Fillomino:
Fill in all empty cells with numbers under the following rules.
Divide all of the board into blocks.
Fill each block with the same number horizontally or vertically.
Each block ...
- 15.8k
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66: Luftballons
This is part 66 of the puzzle series Around the World in Many Days. Each part is solvable on its own.
Dear Puzzling,
This is a Dosun-Fuwari puzzle. Place some balloons (white circles) and anvils (...
- 78.5k
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1
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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 ...
- 270
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A Framework puzzle
About Framework puzzles:
A Framework puzzle is similar to a Fill-in puzzle, except there is no rigid crossword-style grid, the tradeoff here being that you get fewer hints for placing (in this case) ...
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Torus Flow Free
Rules: this is a flow free warp puzzle with a 9x9 grid. connect the respective letters together with lines that travel orthogonally through the centers of grid cells.
additionally, the sides of the ...
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Are circles required on the edge of the grid? Part 2
This question is a follow up to a previous question:
Are circles required on the edge of the grid?
The image below is a puzzle from the FlowFree app.
Notice there are no colored circles on the edge of ...
- 12.4k
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votes
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3-clue 5x5 Hidato
Rules
Fill the grid with numbers 1-25 such that consecutive numbers are adjacent orthogonally or diagonally
Try solving it in Penpa
There are only about a dozen 5x5 Hidatos with only 3 clues.
(...
- 1,698
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Bare Bones – a semi-DIY crossword
This is part 64 of the puzzle series Around the World in Many Days. Each part is solvable on its own.
Dear Puzzling,
This is a semi-DIY crossword. Shade some cells in the grid so that the grid has ...
- 78.5k
11
votes
2
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New record for minimally clued 7x7 Hidato (now with 6 clues!)
Rule of Hidato:
Fill the grid with consecutive numbers such that they connect orthogonally and diagonally.
Solve the following three Hidato puzzles.
8 clues
7 clues
6 clues
You can solve these on ...
- 15.8k
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Current record for minimally clued 7x7 Hidato (16 clues)
Background
Back in March, I posted this question on the Puzzling Stack Exchange asking how many clues were needed to create a 4x4 Hidato puzzle with a unique solution.
Sometime after this, I took a ...
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Are circles required on the edge of the grid?
The image below is a puzzle from the FlowFree app:
The image below is my solution to the above puzzle:
The rules stated in the app are:
Drag to connect matching colors with pipe, creating a flow.
...
- 12.4k