All Questions
Tagged with grid-deduction polyomino
34 questions
12
votes
1
answer
320
views
One number grid, two ways to divide it (Part 2)
Find a rectangular grid of the smallest area that satisfies the following:
Each cell contains an integer between 1 and 4 inclusive.
The grid follows the Fillomino rule:
When the cells are divided ...
- 17.1k
14
votes
2
answers
764
views
One number grid, two ways to divide it
Find a rectangular grid of the smallest area that satisfies the following:
Each cell contains an integer between 1 and 3 inclusive.
The grid follows the Fillomino rule:
When the cells are divided ...
- 17.1k
15
votes
2
answers
646
views
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-...
- 10.6k
18
votes
1
answer
629
views
Tetromino Jigsaw Madness
This is part 23 of the puzzle series Around the World in Many Days. Each part is solvable on its own.
Dear Puzzling,
This puzzle is a crossword-jigsaw hybrid. Cover the white area of the grid with ...
- 81.1k
13
votes
1
answer
1k
views
Sardines and Octopi
This is part 21 of the puzzle series Around the World in Many Days. Each part is solvable on its own.
Dear Puzzling,
The thick black lines in this grid form a LITS puzzle. Shade an orthogonally ...
- 81.1k
10
votes
1
answer
525
views
Coasting Along the Coast
This is part 14 of the puzzle series Around the World in Many Days. Each part is solvable on its own.
Deаr Puzzling,
The larger grid is a Fillomino puzzle. Each of the six different letters in the ...
- 81.1k
9
votes
1
answer
408
views
"Symmetric" Tetrikabe
This puzzle's theme is inspired by one from Grandmaster Puzzles' "The Art of Puzzles", but the puzzle itself is original.
Rules: (Nurikabe section shamelessly stolen from an earlier puzzle ...
- 10.6k
10
votes
1
answer
638
views
From Before Caesar
This is part 4 of the puzzle series Around the World in Many Days. Each part is solvable on its own.
Deаr Puzzling,
How have you been? I hope you don’t mind me showing up a little early this time ...
- 81.1k
24
votes
1
answer
1k
views
The woefully underclued crossword
This puzzle is part of the Monthly Topic Challenge #4: Cross-*non*-words
Giving clues for everything makes things way too simple. In this crossword, four clues are not given and you must find a way ...
- 81.1k
7
votes
1
answer
268
views
Shaka/shawaka: Trominoes
This is a shaka/shawaka puzzle. Place black triangles in some white cells in the grid – formed by dividing a cell diagonally and painting one side black – so that each remaining white area forms the ...
- 81.1k
8
votes
2
answers
363
views
Shaka/shawaka: An introduction
This is a shaka/shawaka puzzle. Place black triangles in some white cells in the grid – formed by dividing a cell diagonally and painting one side black – so that each remaining white area forms the ...
- 81.1k
11
votes
1
answer
1k
views
How to solve this Pentomino puzzle?
The following Pentomino board has exactly one solution:
The solution is known:
I'm trying to solve this board manually, but it is so difficult that I came to believe it is impossible.
I noticed ...
- 299
9
votes
2
answers
539
views
Christmas tree LITSO
Inspired by PSE Advent Calendar 2021 (Day 13): A Christmas Hokuro, I challenged myself to create a Christmas tree-shaped puzzle. Unfortunately I had to edit the shape a little bit because... reasons. ...
- 17.1k
11
votes
1
answer
247
views
Tiling three pears with three-pair hexominos
The 21 hexominos below are all those that can be made by joining three dominos together (i.e. they have a perfect matching with respect to the graph of their squares) and are not rectangles. The ...
- 8,805
18
votes
4
answers
1k
views
It's a LITS! And a... um...?
I've combined two of my favourite puzzle types - a LITS grid-deduction puzzle and a, er... a, um... you know, I could have sworn I wrote it down here somewhere!
Click on the image for a resolution ...
- 155k
23
votes
1
answer
1k
views
Polly O'Mino's Hexcellent Adventure
An entry in Fortnightly Topic Challenge #52: Polyominoes.
I had heard that my good friend Ingrid Deduction was back in town, so I popped round to her apartment today, only to find she'd got herself a ...
- 155k
18
votes
1
answer
577
views
A constrained, but concerning, celestial confrontation
An entry in Fortnightly Topic Challenge #52: Polyominoes.
This puzzle is a hybrid between Pentominous and Star Battle. Your job is to divide the grid below into pentominoes according to the rules of ...
- 29.2k
14
votes
2
answers
714
views
Now you're Packing with Portals #2: Hashtag
Place the colored shapes into the white area, without rotations or reflections, so that they fill it perfectly. The gray walls don't just block shapes, though - they act as portals!
When you place a ...
- 1,600
42
votes
2
answers
2k
views
Now You're Packing with Portals #1
I was staring at my window last night, and daydreaming (nightdreaming?) about filling it with shapes. Suddenly, I was struck with inspiration for a new type of puzzle! Here's a fairly easy instance:
...
- 1,600
15
votes
1
answer
600
views
This Sudoku Park iS LIT!
An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
The grid below is a normal Sudoku grid with normal Sudoku clues, but the completed grid also houses a Statue Park! The completed ...
- 29.2k
9
votes
2
answers
552
views
Tetrikabe: Hiding in the Corners
This puzzle is dedicated to Sciborg. Copying the dear gentleperson, some of the 4s are hiding in the corners.
Rules: (Nurikabe section shamelessly stolen from an earlier puzzle by @jafe)
Numbered ...
- 10.6k
13
votes
1
answer
496
views
Hetero-F(our|ive)-Cells
This is a hybrid of Four Cells and Five Cells (uses pentominoes instead of tetrominoes), with a global no-repeated-piece rule.
Rules:
The grid is to be divided along the grid lines into areas ...
- 17.1k
13
votes
1
answer
548
views
Tetrikabe: Socially Distanced Fours
Pentomino Nurikabe is still elusive, but here is another Tetromino Nurikabe! I'm not sure if the 4s are actually socially distanced enough. (The ones on the right and bottom are doing better than the ...
- 10.6k
11
votes
1
answer
460
views
Tetromino Nurikabe: Five Fours
I enjoy combining polyominos with grid-deductions. My current plan is to create a Pentomino Nurikabe. But that sounds hard, so I made this Tetromino Nurikabe as practice first. I think it came out ...
- 10.6k
15
votes
2
answers
1k
views
Wait, so how many mines are there? A tetromino minesweeper
Here's another tetromino minesweeper. I have bolded where the rules differ between this one and my first tetromino minesweeper
Rules:
A number indicates how many adjacent (including diagonally ...
- 10.6k
13
votes
2
answers
776
views
Tetromino minesweeper: the Amphitheater
This is a minesweeper puzzle with a tetromino twist. The goal is to place mines in the grid, following a few constraints.
Rules:
A number indicates how many adjacent (including diagonally adjacent) ...
- 10.6k
13
votes
2
answers
441
views
Let's Play Tetris!
Fill the whole grid with Tetrominos.
Every cell must be part of exactly one Tetromino.
Tetrominos can be rotated as necessary.
The colored clue cells must be part of the indicated type of ...
- 683
6
votes
1
answer
298
views
Piece de Resistance - Eight Doubled Tetrominoes Make a Tetronogram
Eight Doubled Tetrominoes Make a Tetronogram
This puzzle is part of the "Piece de Resistance" series. Go back to Part 1 (Ace) for the story.Ace Two Three Four Five Six Seven Eight ...
Time for ...
- 21.7k
20
votes
1
answer
725
views
Introducing Tetronogram - Beginner's Version
Introducing Tetronogram! (named by @MrPie)
The puzzle is made of a grid like a nonogram.
Notations are along the axes like a classic nonogram but numbers are replaced by the names of the ...
- 21.7k
8
votes
1
answer
409
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 ...
- 4,899
8
votes
1
answer
492
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....
- 81.1k
-6
votes
1
answer
275
views
Statue Park (Loop)
Place each of the twelve pentominoes into the grid once, with rotations and reflections allowed. No two pentominoes can overlap or be orthogonally adjacent, and all cells not occupied by the ...
- 3,672
9
votes
2
answers
732
views
Tetromi-nuri-doku
Note: This puzzle was inspired by the one here, by Mike Q.
Every square in the grid above, when the puzzle is complete, has a number between 1 and 9 in it and either is shaded or is not. Each 3x3 ...
- 517
15
votes
2
answers
1k
views
Tetromino Sudoku
An entry in Fortnightly Topic Challenge #32: Grid Deduction Hybrids
The grid below, when filled in, forms a valid Sudoku grid. It can also be filled in like a LITS (nuruomino) puzzle without the 1x4 ...
- 6,830