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.
1,234 questions
0 votes
1 answer
84 views
How do I proceed with this Tango puzzle?
Rules to fill out the grid: I must use 3 of each symbol in each row, and in each column. I cannot use 3 consecutive identical symbols (horizontally or vertically). A solid border indicates that the ...
- 1,429
2 votes
4 answers
317 views
Explain deduction from LinkedIn's Queen #564
LinkedIn's Queen #564 (HARD difficulty) I am watching the commentary of today's Queen puzzle (a 1* Star Battle puzzle), given that I complete it in about 2 minutes. But one thing I don't quite ...
- 109
1 vote
1 answer
472 views
Next logical deduction in this Nonogram?
I’ve been working on the following Nonogram and got stuck partway through. I’d like to continue logically rather than by guessing, but I’m not sure what the next forced step is. Here is my current ...
- 19
2 votes
1 answer
184 views
Tips on solving sudokus linearly
The last number of months I have been reading about numerous ways on how to solve Sudokus. So far I am familiar with obvious and hidden singles, obvious, hidden and pointing pairs, obvious, hidden and ...
- 121
18 votes
3 answers
2k views
How many computers can be connected at once?
Netwalk (and other names) is a puzzle game with randomly generated "networks" consisting of computers (nodes), a source node, and connectors (either a straight through pipe, a right-angled ...
- 424
6 votes
0 answers
186 views
Sudoku Variant Puzzle
Some background first. The gimmick for this puzzle was inspired by a recent puzzle in a mathematics discord. As part of solving that problem I learned how to use a SAT Solver to generate cases. During ...
- 351
7 votes
2 answers
526 views
A curious Slitherlink Deduction
In the following Slitherlink, where you need to make one unbroken loop over the grid with the number in each cell matching the number of edges around that cell, I noticed that the 3-2-2-1 2x2 box at ...
- 6,726
12 votes
2 answers
591 views
Place a nonzero digit into some of the white cells of the grid
Place a nonzero digit into some of the white cells of the grid. Shaded cells must remain blank. No digit can repeat in a row or column. In each row, the sum of the digits must be equal to some fixed ...
- 341
9 votes
1 answer
509 views
A Pranaytious Minesweeper
This is another Minesweeper puzzle in a series I've created. I am the author of this puzzle. I wrote the code that creates it, and as far as I can tell it is my own invention, obviously based on the ...
- 1,117
6 votes
1 answer
256 views
Pentadoku puzzle with only four clues (Jigsaw Sudoku)
Fill each empty square with a number so that every row, every column and every irregularly shaped region contains all the numbers 1, 2, 3, 4 and 5 each exactly once. If you enjoyed this puzzle, you ...
5 votes
1 answer
219 views
Minesweeper With Extra Rules
The Minesweeper Puzzle nobody was asking for is back! Rules: All standard Minesweeper rules apply. All cells with a clue of 0, 1, 5, 6, 7, and 8 are revealed All possible Gray flags are revealed. ...
- 1,117
5 votes
1 answer
371 views
Yin-Yang puzzle [closed]
Rules of Yin-Yang: Fill each empty cell with either a black circle or a white circle. All white circles should be orthogonally connected, so do all black circles. There may not be any 2x2 cell region ...
- 151
5 votes
1 answer
306 views
Another Slitherlink Next Step
In Slitherlink, you are supposed to make one single loop over the edges of the grid, while each cell has a specified number of edges which are part of the loop. If there is no number then it is free. ...
- 6,726
0 votes
2 answers
399 views
3 votes
2 answers
348 views
Loopy Snub-Square
What next (for a new line) if without backtracking? I am more interested in moves which allow to continue solving. It looks like diagonal deductions are exhausted. A link to it for interactive play. ...
- 321