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. 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.
241
questions
12
votes
1answer
578 views
A bicolour masyu
This is a bicolour masyu puzzle. Instead of making one continuous loop, the goal is to make two separate loops, one blue and one red. The coloured circles must be used for the loop of the same colour, ...
12
votes
1answer
164 views
Masyu-making game
Two players are playing a game on a $4\times4$ board. The players take turns adding either a white circle or a black circle into any empty square, so that the board makes a solvable masyu puzzle (with ...
4
votes
1answer
76 views
The revenge of 3D light bulbs
This is a three-dimensional Akari puzzle (also known as Light Up). The five squares represent the layers of a $5\times5\times5$ cube, top to bottom. The objective is to add light bulbs into any number ...
8
votes
2answers
915 views
3D? No-no! 3 Sides
Introducing the Isometric Nonogram!
α) "Boar"ing Definition [oink]
Column: Blue Part + Green Cell
Row: Yellow Part + Green Cell
Adjacent/ Continuous cells: Purple Cell + any of the Orange ...
5
votes
2answers
113 views
3D Nonogram - Spinoff of the Reboot
This puzzle is inspired by recent 3D nonogram puzzles by Jafe and Omega Krypton. Check those out if you want, but they are not required to understand this puzzle.
This 3D nonogram has clues with two ...
1
vote
1answer
77 views
How Should I Go About Answering Square Spin Puzzles?
The Square Spin series of puzzles is a bit abstract. There is quite a lot for newcomers to digest and getting started may be daunting. Even if you thoroughly read the rules and intend to attempt one ...
7
votes
2answers
224 views
Nono-cube - Ultimate Puzzle Giant
Prologue - Instructions
Shamelessly copied and pasted the following from @jafe's puzzle :P
This is a three-dimensional nonogram. The first square gives the enumerations for the Z-axis, top to ...
13
votes
2answers
883 views
Four-dimensional light bulbs
In reaction to Three-dimensional light bulbs - rules are same (almost)
This is a four-dimensional Akari puzzle (also known as Light Up). The nine squares represent the layers of a $3\times3\...
11
votes
1answer
640 views
Three-dimensional light bulbs
This is a three-dimensional Akari puzzle (also known as Light Up). The six squares represent the layers of a $6\times6\times6$ cube, top to bottom. The objective is to add light bulbs into any number ...
8
votes
2answers
298 views
Square Spin #4: Rude Awakening
Square Spin History: #1>#2>#3>#4
New Rule
This puzzle introduces a new square type:
Lonely squares (Ly)
Lonely squares
This type of square contains a box and it is ...
6
votes
1answer
167 views
Restoring 3D Tetromino Puzzle
You won't believe this. I worked all night to make a new 3D tetromino puzzle, and just as I was about to save the final version there was a power outage! Now I can't remember what the final clues were ...
6
votes
1answer
186 views
3D tetromino placement
The following image depicts a $5\times5\times5$ cube. Insert any number of the pictured 3D-tetromino pieces into the cube to satisfy the conditions listed below. Pieces may be rotated in any direction....
6
votes
1answer
192 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 ...
8
votes
1answer
300 views
I'm Bad at Naming Things, so Just Try to Solve this Patterned Masyu Puzzle!
$\hskip1in$
The original Masyu rules apply.
Make a single loop with lines passing through the centers of cells, horizontally or vertically. The loop never crosses itself, branches off, ...
21
votes
2answers
1k views
Can you create a free-floating MASYU puzzle?
Rules of MASYU, for those unfamiliar: https://www.gmpuzzles.com/blog/masyu-rules-and-info/
Hey guys! So I just discovered this really cool puzzling site called the Puzzling Stack Exchange (puzzling....
6
votes
1answer
164 views
3D nonogram – The one-thousander
This is a three-dimensional nonogram. The first ten squares depict the layers of a $10\times10\times10$ cube. The final square gives the enumerations for the Z-axis, top to bottom. Some rules:
If a ...
10
votes
1answer
296 views
3D nonogram – What's in the box?
This is a three-dimensional nonogram. The first six squares depict the layers of a $6\times6\times6$ cube. The final square gives the enumerations for the Z-axis, top to bottom. Some rules:
The grid ...
10
votes
1answer
459 views
3D nonogram – What's going on?
This is a three-dimensional nonogram. The first six squares depict the layers of a $6\times6\times6$ cube. The final square gives the enumerations for the Z-axis, top to bottom. Some rules:
The grid ...
7
votes
1answer
176 views
Nono-Cube: Approach at Your Own Risk
Inspired by jafe's 3D nonograms :)
Answer is one word.
This puzzle is a part of Ooohh, it all makes sense now! :D
8
votes
2answers
265 views
Not Just Black and White
Answer for this puzzle is one word. Have fun!
Highlighted parts are where I realised I have clued it wrong... Sorry for all this inconvenience!
Hint:
usefulness level 1
usefulness level 2
This ...
7
votes
2answers
233 views
Square Spin #2: Climb the Mountain!
Square Spin History: #1>#2
New Rules
This puzzle introduces two new square types:
Unmovable squares (Un)
Replaceable squares (Re)
Plus the concept of ambiguity!
...
5
votes
1answer
148 views
You Sign Me Right Round (Extended Edition)
I wanted to ask more questions about variations on This Problem. If you hadn't seen that one, check it out. It's required reading (and probably more fun).
In the original problem, these were the ...
16
votes
3answers
454 views
Tiling a square with rectangles
Tile completely this 47 x 47 square with 52 rectangles. Each rectangle must contain precisely one numbered cell, and that number must be the area or perimeter of the rectangle it finds itself in.
...
14
votes
1answer
868 views
3D nonogram – Name the object
This is a 3D nonogram. The first five boxes represent the five layers of a $5\times5\times5$ cube, and the last box shows the enumerations for the Z-axis. (Note that 11 means two stretches of length ...
21
votes
1answer
583 views
3D nonogram, beginner's edition
Trying out the concept of 3D nonograms. This one should be pretty simple.
Name the depicted object.
8
votes
2answers
197 views
You Sign Me Right Round
This is a 9x9 grid, with a sign in the center cell like shown. You can add signs to this grid one at a time following these rules:
Each sign placed must point to the next sign placed
Placed signs ...
12
votes
3answers
639 views
3D Crossword, Cryptic, Statue View & Maze
The following image depicts the layers of a $5\times5\times5$ cube. Using 3-dimensional thinking, can you find the way out of the cube?
Empty version with no crossword numbers
Empty version ...
2
votes
5answers
790 views
Very tricky nonogram - where to go next?
I've become somewhat addicted to Simon Tatham's "Pattern" (nonogram) puzzles recently. I thought I was becoming fairly adept with them, but this unusually difficult one has me stumped. I've got as far ...
17
votes
4answers
936 views
A letter from Mr. Pirate, Mr. Roller, and Mr. Knight
Though I don't think it will help, you may check with the beginning of my story concerning Red Herring Puzzle Club.
It seems like it's been a long time since I tried to enter the R.H.P.C. As you may ...
9
votes
1answer
205 views
Vertical and Horizontal Bars - An Instructionless Puzzle
Study the 2 examples given on the left and solve the puzzle on the right!
The solution for each puzzle can be uniquely determined.
2
votes
1answer
178 views
Solve the pattern! (game)
Okay, so this is based off of https://www.chiark.greenend.org.uk/~sgtatham/puzzles/js/pattern.html
And, my cousin made a random pattern and gave it for me to solve.
Unfortunately, the logic is ...
13
votes
1answer
243 views
Statue View: 2, 3, 5, 7
This is another Statue View puzzle. It's easily the hardest of the three I've made, so I recommend trying the other two as practice first.
Rules of Statue View:
Shade some cells of the grid to form ...
12
votes
1answer
236 views
Statue View: Raindrops
This is a Statue View puzzle, an original invention combining two logic puzzle genres: Statue Park and Canal View. It is harder than my previous Statue View, so you may want to start there.
Rules of ...
19
votes
2answers
347 views
Statue View: Tetrominoes
This is a Statue View puzzle, an original invention combining two logic puzzle genres: Statue Park and Canal View.
Rules of Statue View:
Shade some cells of the grid to form the given set of pieces. ...
15
votes
1answer
475 views
Statue Park: Knight's Lines
This is a Statue Park puzzle.
Rules of Statue Park:
Shade some cells of the grid to form the given set of pieces. Pieces may be rotated or reflected.
Pieces cannot be orthogonally adjacent (though ...
8
votes
1answer
268 views
Statue Park: Five
This is a Statue Park puzzle (originally constructed for the 2019 24-Hour Puzzle Championship, as part of a Tarot card themed set -- no prizes for guessing which rank this puzzle was).
Rules of ...
5
votes
2answers
258 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.
...
21
votes
2answers
355 views
Untitled, for Now
As you step into the gallery, you notice an interesting piece of art hanging on the wall.
"I like the piece, but what's with the title?" you ask the docent. "I'm used to obscure titles in modern art, ...
17
votes
3answers
997 views
Hexagonal Grid Filling
Fill in each blank white hexagon with a digit from 1 to 9. Each of the grey hexagons is the sum of the white hexagons around it, and all of the white hexagons that are around the same grey hexagon ...
5
votes
4answers
232 views
Fill the grid (pattern)
Can you guess what comes in place of the question mark?
Here's a text-based version of the table:
...
62
votes
4answers
4k views
Gerrymandering Puzzle - Rig the Election
The following graphic is a map of the country Mathlandia:
You are currently running for reelection, but the polls aren't exactly in your favor. Each square in this grid is a county. Counties with a ...
-4
votes
10answers
910 views
SafeCracker #3 - We've Been Blocked [closed]
Our Last Safe To Conquer
Ok, team, this one might give us a little trouble. Nothing we can't handle though... let's go...
This safe model is "The NevaCrak 9000" - the most secure safe there is.
...
5
votes
2answers
197 views
SafeCracker #2 - The Mission Continues
Thanks to an alert StackE user, we were able to get the first safe open.
Mission Details
This next safe is in a former employee's house. He is gone for now, so we have no time to spare.
We weren't ...
15
votes
2answers
2k views
Virus Detected - Please execute anti-virus code
Virus Detected!!!
Your computer, which is represented by the grid pictured, has been infected. The bugs are clearly marked. It's your job to inject your awesome anti-virus code in the proper computer ...
1
vote
3answers
227 views
Can someone solve this kakuro?
Can someone solve this? Please tell me how you did it.
Source: Puzzle Page app
13
votes
2answers
586 views
3D Masyu - A Die
Fold this net into a cube and solve this 3D Masyu.
The original Masyu rules apply. In addition, question mark '?' should be replaced by either a black or white circle.
Side note: Yeah, it's almost ...
5
votes
1answer
283 views
Modified Intersection Puzzle
This is a slightly modified version of the Intersection Puzzle introduced by user477343 here.
In this case, you are given a $7 \times 8$ grid with circles and boxes provided in some of the cells.
...
19
votes
5answers
588 views
Square Spin #1: Sun and Moon
Defining Square Spin
Lets play a game!
The aim of this game is to transform one image into another using the least amount of moves possible. Here is what a move consists of:
...
6
votes
2answers
312 views
Swap — A Puzzle I Created
This puzzle is called Swap. Let's find out why!
Suppose you are given a random $\rm N\times N$ matrix (grid) with all the integers from $1$ to $\rm N^2$ each belonging in every grid square (a.k.a. ...
11
votes
3answers
502 views
Intersection Puzzle
I have invented a new puzzle called Intersection. Let's find out what it is!
Intersection
You are given an $n\times n$ grid with circles and boxes inside arbitrary squares. A circle cannot be in the ...
