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.

Filter by
Sorted by
Tagged with
8
votes
0answers
65 views

Chain Puzzle: Tabletop Games #06 - So Sorry

This is the sixth Chain Puzzle in the Tabletop Games series, in which all puzzles are themed around board games, card games, tile games, and the like. The answer to this puzzle is a thematic word or ...
2
votes
0answers
333 views

Not a sudoku, but still fun?

Context: I was trying to solve some of the puzzles on this site, when it occurred to me to make a puzzle variant myself. I immediately could construct one with my additional rule. Making an ...
24
votes
1answer
2k views

This new puzzle type needs a name {6}

I believe I have invented** a new type of puzzle... What is its name? Begin by solving the Fillomino puzzle: Rules of Fillomino (adapted from Nikoli) Fill in all empty cells with numbers under the ...
15
votes
1answer
442 views

Chain Puzzle: Tabletop Games #05 - It's Yahtzee, Jim, but not as we know it

This is the fifth Chain Puzzle in the Tabletop Games series, in which all puzzles are themed around board games, card games, tile games, and the like. The answer to this puzzle is a thematic word or ...
12
votes
1answer
226 views

Carcass Walking: An introduction

Carcass Walking is a grid puzzle inspired by the board game Carcassonne. The objective is to place the given cities into the grid, connect them with roads, draw one river across the grid, and find ...
10
votes
1answer
392 views

Santoitchi: Introduction

Santoitchi is yet another genre involving trominoes. It appears to be invented by Inaba Naoki, and then picked up by Bram de Laat, who uses the name Sandwich (blame Google Translate for the possible ...
15
votes
1answer
537 views

Bobblie Statue Park

This is a Statue Park puzzle. Rules of Statue Park: (shamelessly stolen from an earlier puzzle by @Deusovi) Shade some cells of the grid to form the given set of pieces. Pieces may be rotated or ...
6
votes
1answer
143 views

Jewel Cave: Long Reach

As in a previous puzzle, the goal of this Jewel Cave is to place the given shapes (in this case, the standard pentomino set) into the grid, subject to the following rules: All unshaded squares must ...
10
votes
1answer
151 views

Another Jewel Cave

As in a previous puzzle, the goal of this Jewel Cave is to place the given shapes (in this case, the standard pentomino set) into the grid, subject to the following rules: All unshaded squares must ...
3
votes
1answer
97 views

Nurikolor (Level 8)

Previous Level: Nurikolor (Level 7) It's been 9 days since the last puzzle. We will start Level 8 right now, with new features. There are colored numbers on the grid, which indicate the number of ...
2
votes
1answer
234 views

Masyu puzzle with secret code

What secret code is hidden in this masyu puzzle? Note: The regions marked with x are not to be drawn
-3
votes
1answer
240 views

Nurikolor (Level 7)

Previous Level: Tapa-Nurikolor (Level 6) Next Level: Nurikolor (Level 8) I saw that the last $2$ levels had a lot of flaws and were not unique. Hence this time I am giving an easy puzzle with ...
14
votes
2answers
701 views

A Shingoki Puzzle

This is a Shingoki puzzle. Rules of Shingoki: Draw lines between the dots to form a single loop without crossings or branches. The loop should pass through every circled number in the grid. For ...
10
votes
1answer
289 views

A Simple Antisymmetric Masyu

The standard Masyu rules apply.
9
votes
1answer
241 views

Heteromino: Solitude

Heteromino is an area-dividing puzzle with very simple rules. Here is an example puzzle with solution: The rules of Heteromino are as follows: Divide the white area into L- or I-trominoes. No two ...
10
votes
1answer
4k views

Creating a Kakuro puzzle with unique solution

I start with a grid of black and white cells. I randomly populate the white cells from numbers (1-9) using kakuro rules. Then I calculate the horizontal and vertical sums. I remove the numbers from ...
13
votes
2answers
510 views

Jewel Cave - A Statue Park-Cave Hybrid

The goal of this puzzle, a hybrid of Statue Park and Cave, is to place the given shapes into the grid, subject to the following rules. As in both original puzzles, all unshaded squares must form a ...
2
votes
1answer
183 views

Suko-kulink (Sudoku, Suko and Slitherlink tri-brid)

Rules: The lower part of the puzzle is a sudoku. Basic sudoku rules applied. The upper and right of the puzzle are suko puzzles. The numbers in circle and to the selected square has the same number ...
13
votes
1answer
437 views

Heteromino: Introduction

Heteromino is an area-dividing puzzle with very simple rules. I encountered this puzzle type on puzz.link, and seeing there's none posted here, I decided to give it a try. Here is an example puzzle ...
9
votes
1answer
127 views

Filling numbers in a grid

Here's the problem and the diagram that goes with it Fill in each empty space of the grid in the image below with a number from 1 to 8 so that every row & column contains each of these digits only ...
11
votes
1answer
198 views

Statue Park: Spare Parts

I've been doing a bunch of shape-placing puzzles lately, and I found some spare parts leftover. I figured I'd make a Statue Park out of them! The grid: Solver Note I know there are a lot of squares ...
12
votes
1answer
219 views

Maserlink - A Masyu-Slitherlink Hybrid

Both Masyu and Slitherlink puzzles have as their target a single closed loop that does not touch or intersect itself. So it seems natural to create a hybrid that uses both Masyu and Slitherlink clues. ...
3
votes
2answers
235 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 ...
18
votes
3answers
1k views

Statue Park: Self-portrait!

This is a Statue Park puzzle. Rules of Statue Park: (adapted from an earlier puzzle by @Deusovi) Shade some cells of the grid to form the given set of pieces. Pieces may be rotated or reflected. ...
7
votes
1answer
138 views

Nonorasu - A Nonogram-Kakurasu Hybrid

Both Kakurasu (or see this puzzle for a description) and Nonogram puzzles require the solver to shade certain cells in a square grid by providing clues to the shading pattern of individual rows and ...
7
votes
0answers
148 views

How to prevent overcluing in a Statue Park?

I'm interested in making some Statue Park puzzles. This genre seems easy to accidentally overclue. I have read Deusovi's grid-deduction creation guide, but all it had to say was this: When placing ...
57
votes
2answers
3k views

Sudoku like you've never seen it before

I've spent this week trying to create a difficult logic puzzle which is a combination of two Sudoku varaints, 'Samuari Sudokus' and 'Pseudokus', and this combo is unlike anything you can find online. ...
7
votes
1answer
420 views

A sudoku with only four given digits and some more rules

Ok so this is one of the hardest sudokus (and one of the best sudoku) I have ever seen, with only $4$ given digits. There are some more rules too :- $(i)$ First, normal sudoku rules apply here. $(ii)$ ...
-2
votes
1answer
192 views

Tapa-Nurikolor (Level 6)

Previous level: Massive NuriKolor (Level 5) (Red-Fury) Next level: Nurikolor (Level 7) We now have Tapa involved in the Nurikolor puzzle, and this is the 6th one (if you include a spinoff.) There ...
2
votes
0answers
399 views

A robot moving on a grid. Part 2

This is an extension of the discussion A robot is placed on a grid point. At each move the robot must take three steps along the edge of the grid. After each step the robot must turn right. Lengths of ...
-6
votes
1answer
216 views

Massive NuriKolor (Level 5) (Red-Fury)

Previous Level: Nurikolor (Level 4) Next Level: Tapa-Nurikolor (Level 6) Level 5 introduces a 11x12 grid, and this time we have 9 colors. (Colours used here are Red, Blue, Green, Ivory, Brown, Orange,...
4
votes
1answer
133 views

Another Nutakapa

This puzzle is another Nurikabe-Tapa hybrid puzzle, similar to one of the poster's previous puzzles. In this grid, your task is to create a single fully-connected shaded path with no 2-by-2 blocks ...
10
votes
1answer
299 views

Trichain: The Capital “A”

Previous: Trichain: Going Higher Trichain is a puzzle type I invented. It is somewhat similar to Nurikabe, but it uses a chain of L-trominoes instead of a continuous wall. Example puzzle with ...
14
votes
1answer
379 views

Trichain: Going Higher

Previous: Trichain: Introduction | Next: Trichain: The Capital "A" Trichain is a new puzzle type I invented. It is somewhat similar to Nurikabe, but it uses a chain of L-trominoes instead ...
12
votes
2answers
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 ...
2
votes
3answers
237 views

Nurikolor (Level 4)

Previous Level: Nurikolor (Level 3) Next Level: Massive NuriKolor (Level 5) (Red-Fury) Level 4 introduces a 9x9 grid, but we still have 8 colors to work with. There are colored numbers on the grid, ...
6
votes
1answer
310 views

Nurikolor (Level 3)

Previous Level: Nurikolor (Level 2) Next Level: Nurikolor (Level 4) Level 3 has arrived, and the grid gets larger, now being an 8x8. The rules still apply. There are colored numbers on the grid, ...
12
votes
2answers
615 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) ...
5
votes
1answer
200 views

Nurikolor (Level 2)

Previous level: Nurikolor (Level 1) Next level: Nurikolor (Level 3) Level 2 of Nurikolor is now here. As a recap, here are the rules, but changed "X" to colors. There are colored numbers on ...
6
votes
1answer
223 views

Nurikolor (Level 1)

Next level: Nurikolor (Level 2) Welcome to my new puzzle: the NURIKOLOR, which is essentially the colored version of Nurikabe, but not exactly, with a few twists. The rules are simple: There are ...
12
votes
2answers
463 views

Slitherlink (Sheep & Wolves)

Apply Slitherlink rules. In addition, all sheep must be inside the loop and all wolves must be outside the loop.
6
votes
1answer
438 views

Zed's Mystery: Thetis… Vanished into Thin Air!

My friend Thetis and I cons— wait, where's Thetis? Hmm, that's funny... she was here a minute ago.... Wait, a note!... Oh dear, it seems things have taken a turn from bad to worse; Thetis is not only ...
15
votes
1answer
409 views

Ingrid Deduction pops by with a puzzle

The other night I was sat at home in Providence when the doorbell rang. To my surprise, my very good friend Ingrid Deduction stood on the step, a huge grin on her face and a piece of paper held out ...
13
votes
1answer
466 views

Trichain: A Bottle of Rum

This is a Trichain puzzle. The rules of Trichain are as follows: Numbers must be white, and match the size of their white islands. Each white island can only contain at most one number. Some white ...
10
votes
2answers
335 views

Nutakapa: A Nurikabe-Tapa Hybrid

Nurikabe and Tapa puzzles have the interesting property that the target shading is identical for both: a fully-connected shaded region with no 2-by-2 blocks. The difference is the cluing, so there ...
6
votes
1answer
274 views

Trichain: Three Times Ten

This is a Trichain puzzle. The rules of Trichain are as follows: Numbers must be white, and match the size of their white islands. Each white island can only contain at most one number. Some white ...
17
votes
1answer
458 views

Trichain: Introduction

Next: Trichain: Going Higher Trichain is a new puzzle type I invented. It is somewhat similar to Nurikabe, but it uses a chain of L-trominoes instead of a continuous wall. Example puzzle with ...
17
votes
1answer
904 views

Take a look at my aquarium

This is intended as a gentle introduction to one of my current favourite grid-deduction puzzle types: Aquarium. The puzzle is played on a rectangular grid divided into regions called "aquariums&...
7
votes
1answer
155 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 ...
7
votes
2answers
505 views

Tribute to Eugene Varshavsky bwahhahahahahahahah

Each cell in the lower-right 9x9 grid must contain a positive integer or be left blank. Numbers on the outside of the grid indicate the sums of one or more adjacent digits in that row or column, in ...

1
2 3 4 5
11