# 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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### Double feature: Going postal

This puzzle is part 8 of the Double feature series (first part here). The series will continue in "Double feature: Unpopular". Rules of Yajilin1 Shade some cells in the grid. The ...
169 views

### Raindrops revisited

I made a big mistake with my last post, and the puzzle I presented did not have a unique solution...many thanks to Deusovi for pointing it out, and many apologies to Deusovi and any others who spent ...
529 views

### ASCII Art Painting

I've been taking an art course recently, and I met someone who was proficient with grid ASCII art paintings. However, the teacher of the class always seemed to think there was something wrong with his ...
320 views

### My featured entry

Mosaic is a Minesweeper-like puzzle based on a grid with a pixel-art picture hidden inside. Using logic alone, the solver determines which squares are painted and which should remain empty until the ...
341 views

### A game of cricket

This puzzle is part 14 of Gladys' journey across the globe. Each part can be solved independently. Nevertheless, if you are new to the series, feel free to start at the beginning: Introducing Gladys. ...
427 views

### A symmetrical Yajilin

Inspired by @Athin's efforts, I decided to try to come up with a Yajilin puzzle of my own for your entertainment and amusement. Rules (shamelessly stolen from @Athin's post) Draw a line to ...
154 views

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 ...
341 views

### Haisu: Pink Rose

HAISU is a portmanteau of three Japanese words - 'hairu', to enter, 'su', number, and 'hausu', an English borrow word meaning house, of course. Together, we get a meaning of 'enter number house', ...
223 views

### Square Spin #3: Hickory Dickory Dock

Square Spin History: #1>#2>#3 Recap of the Rules Basic rules from #1 Ambiguity, Un and Re squares from #2 Problem #3: Hickory Dickory Dock The mouse ran up the clock. ...but ...
217 views

### Fill in the letter cycles

ITM . NDR . EAU . ULT . TEN . TDP . YMH . RYI . SHM . PED . ODP . HIT . AKL . NPT . UKT . UTS . ESA . PRT . DOR . YMT Fill each of the empty circles above with a unique letter. Each of the three ...
2k views

### Are there any sudoku puzzles combined with magic squares? [duplicate]

As everyone knows, in Sudoku the sum of each row and column is 45. So all Sudoku solutions are some kind of magic square. My question is: Has anyone seen a Sudoku puzzle combined with the magic square ...
199 views

### Humans, vampires and mirrors part 2: the triangular mirrors

Find part 1 (without triangular mirrors) here. Here is a room composed of $10 \times 10$ squared cells. Each cell can be empty (𝑋) or contain one of the following: a double-faced mirror ( / or \ ); ...
268 views

### Lasers: The Reflection (Level 2)

Previous Level:- Lasers : Introduction (Level $1$) So here is my lasers level 2 continued, and I have something new, mirrors! Rules: There will be lasers which are shaped like an arrow. The arrows ...
344 views

### Is this N=3 Star Battle unsolvable?

Recently I've been solving some puzzles known as Star Battle, but I've come across a puzzle that no matter how many times I restart, I always seem to arrive at a contradiction. Star Battle is played ...
239 views

### Lasers: Cross through the bridges (Level 3)

Previous Level:- Lasers: The Reflection (Level 2) Rules : There will be lasers which are shaped like an arrow. The arrows pointing in the respective direction shows where the laser goes and the ...
415 views

### What in this world is she trying to say?

I happened to meet one of my friends after about a couple of years. Obviously we both were very happy, but still, she didn't leave her habit of challenging me to decipher what she was saying. I ...