# Questions tagged [slitherlink]

Slitherlink is a logic puzzle where the goal is to draw a loop so each number has that many edges of the loop adjacent to it. Use with [grid-deduction] and [logical-deduction].

50 questions
Filter by
Sorted by
Tagged with
4answers
3k views

### Five Slitherlinks

Solve five Slitherlinks, each with a unique solution. Please say a word regarding (or show an image depicting) each solution method.
1answer
2k views

### This new puzzle type needs a name {EXTREME EDITION}

A companion puzzle to the 'This new puzzle type needs a name' series, and inspired in part by @JeremyDover's answer to a recent question. Usually, puzzles in this series comprise a mash-up of two ...
2answers
2k views

### Q: What kind of logic puzzle would you like? A: Yes

A recent post and Stiv's answer provided inspiration for a new puzzle. I posted a study for this puzzle earlier; this is the bigger effort envisioned. I hope you enjoy! This puzzle consists of four ...
1answer
2k views

### This puzzle design was a DISASTER!

As any member of the PSE community knows, grid-deduction puzzles really aren't my forte. In fact, I'd like to share one particularly disasterous attempt at designing a Slitherlink puzzle. Disclaimer:...
1answer
993 views

### What's going on with this puzzle?

What is going on with this slitherlink puzzle with clues $2^3$?
1answer
518 views

### Slitherlink: Around the W0rld

Rules of Slitherlink: Connect adjacent dots with vertical or horizontal lines to make a single loop. The numbers indicate how many lines surround it, while empty cells may be surrounded by any number ...
2answers
485 views

### A Chromolink puzzle

Here's a variant of a slitherlink puzzle. Each color (yellow, orange, green, blue) represents one of the numbers 0, 1, 2 or 3. Enjoy! Bonus: Can we be sure there is only one solution?
2answers
1k views

### Devoted to high culture

This puzzle is part 4 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. ...
2answers
1k views

### 25x25 slitherlink puzzle

Basic rules Form a loop using the dots (so, by joining orthogonally adjacent dots) such that a number N is surrounded by exactly N segments of the loop. Here's a tutorial puzzle and its unique ...
1answer
500 views

### Slitherlink with a message

An entry in Fortnightly Topic Challenge #48: Unusual tag mix After pondering what my next puzzle would be about I decided to change my base towards the realm of slitherlink puzzles. I found this ...
1answer
731 views

### Why you shouldn't buy cheap puzzle books

Backstory contains important information, but nothing hidden. Also, tl;dr parts are bolded, but I can't guarantee I didn't forget bolding some part. Recently there's been a grid-deduction craze here ...
2answers
1k views

### A slitherlink with only 3's

As we know, 3's seems to be very rare in slitherlinks. This is the slitherlink with only 3's.
2answers
751 views

### Slitherlink Fillomino hybrid

This puzzle is a combination between a Slitherlink and a Fillomino. You should put a number in each square and draw a single closed loop over the grid such that the following properties are satisfied:...
2answers
531 views

### Adderlink: Almost symmetrical

Rules: Hey, this looks like slitherlink! In fact, it is two slitherlinks added together. So both of the two slitherlinks have clues in exactly the same locations as this grid below. Furthermore, a 2 ...
2answers
578 views

### The Terrible Twos of Slitherlink

This question is aimed at people who have a really good grasp of standard Slitherlink puzzles. This is a standard, square cell, 10x10 Slitherlink puzzle I designed. It isn't what I would call a "...
2answers
565 views

### Slitherlink with crossing allowed

In a Slitherlink puzzle, you need to construct a single closed loop connecting points of a grid such that each number clue counts the number of adjacent loop segments. Normally, a Slitherlink puzzle ...
2answers
508 views

### Slitherlink - A0, B1, C2, D3

The standard Slitherlink rules apply. However, first replace $A_1$, $A_2$, $B_1$, $B_2$, $C_1$, $C_2$, $D_1$, and $D_2$; such that the Slitherlink is uniquely solvable. Moreover, these equations must ...
1answer
251 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. ...
1answer
293 views

### Rhombicosidodecahedron Slitherlink

This is a Slitherlink puzzle, being played on the surface of a 3D object, a Rhombicosidodecahedron. If you are not familiar with Slitherlink puzzles, I don't suggest starting on this one. Rules in ...
2answers
546 views

### Slitherlink (Sheep & Wolves)

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

### Solve this algebraic equation

Wait what? Is there any equation?
2answers
1k views

### SlitherLink on moderate or large boards: going beyond 0s and 3s

When playing SlitherLink on moderate or large boards I usually find that after using the basic techniques: filling out the values in the corners setting lines where there are adjacent 3s setting ...
1answer
632 views

### Slitherlink - It's all in the 2s

Can you solve this Slitherlink puzzle that I came up with? And in CSV: 3 - 3 - 2 - - 2 - 2 - 2 - - 1 1 2 2 1 - - 2 - 2 2 - - - 2 - 1 2 - - 1 - I tried to ...
1answer
605 views

### Nurikabe-Slitherlink

Yesterday's post and Stiv's answer provided inspiration for a new puzzle. What I envision will be a big effort, so I spent part of yesterday creating a study, a sample part of the bigger puzzle to get ...
2answers
799 views

### Slitherlink with so many 2's

Normal slitherlink rules apply.
2answers
454 views

### A Sincere Slitherlink Puzzle

So here's a standard Slitherlink puzzle. Feeling Déjà vu? Rules (adapted from Nikoli): Connect adjacent dots with vertical or horizontal lines to make a single loop. The numbers ...
1answer
295 views

### A Difficult Rhombicosidodecahedron Slitherlink

This is the evil older brother of this puzzle. I'm posting it more out of scientific curiosity than because it is a fun puzzle, because it is not a fun puzzle. It's just really hard. I wrote a ...
1answer
203 views

### 3D Slitherlink (Slithersurface)

Here is a 5 x 5 x 5 cube filled with numbers. It's a 3D adaption of standard slitherlink puzzles. You must create a solid 3D object such that the number in each sub-cube matches the number of adjacent ...
1answer
1k views

### What is a “unique solution” in a Slitherlink puzzle?

In the question Five Slitherlinks, the querent suggests that "each [Slitherlink puzzle has] a complete solution". I'm newly reading about Slitherlinks, but I don't understand what makes a solution "...
2answers
273 views

### 4 pieces into a big slitherlink

Arrange the 4 pieces into a big slitherlink. To help you arrange it, First find the solvable small slitherlink then put it in the bottom-left position. 1st piece 2nd piece 3rd piece 4th piece
1answer
474 views

### (5 of 11: Slitherlink) What is Pyramid Cult's Favorite Person?

Dear PSE users and moderators, I’m new here in PSE, but I really need your help. There was this person who gave me a black envelope consisting 10+1 pages of puzzles, and also a scribble saying: “Find ...
0answers
156 views

### 9x9 Sudoku Slitherlink Hybrid

I previously created a combined slitherlink and sukoku puzzle, but I was unsatisfied because the grid was smaller then a regular sudoku. So I made another, larger one. Below is a 9 by 9 grid. This is ...
3answers
841 views

### How to union a slitherlink and a nonogram?

I would like to union two puzzles in one. The first puzzle is a slitherlink, the second is a nonogram. The main idea is: the slitherlink's solution is the entrance for the rows of the nonogram. In the ...
2answers
551 views

### I'm stuck on this game of Slitherlink

I'm stuck on this game of Slitherlink. What deduction (or deductions) can be made from here? Am I missing something obvious? I verified that everything I have so far is correct by looking at the ...
2answers
358 views

### Quick Slitherlink Puzzles: KPK and 123

Slitherlink (taken from Nikoli) Connect adjacent dots with vertical or horizontal lines to make a single loop. The numbers indicate how many lines surround it, while empty cells may be ...
1answer
431 views

### Double feature: Health shakes

This puzzle is part 10 of the Double feature series (first part here). The series will continue in "Double feature: Computer problems". Rules of Slitherlink1 Draw a single continuous ...
1answer
220 views

### The Terrible Twos of Slitherlink Part Deux

Please read and understand my first question before proceeding. This one should be worse. pdf files I uploaded to Dropbox: Slitherlink of Twos Their solutions These puzzles were generated by ...
1answer
269 views

### How to solve this Loopy puzzle efficiently with little backtracking?

I would like to solve this Loopy (Cairo) puzzle: But I would like to do so with as little backtracking as possible. By this I mean that I want to have at most one pending guess at a time; I do not ...
2answers
336 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. ...
3answers
618 views

### Slitherlink the second

Find the solution to this slitherlink puzzle that I came up with: This one's even smaller!
1answer
120 views

### Sudoku + Slitherlink

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 ...
2answers
238 views

### Pentagonal Slitherlink Puzzles

Above are two Slitherlink puzzles on pentagonal boards. Enjoy, and let me know in the comments how difficult you think each puzzle is.
2answers
426 views

### Help with pathing game Loopy

I am stuck on the game Loopy inside of Simon Tatham's Portable Puzzle Collection. I do recommend this puzzle collection, and it's available on several platforms: Online (you can play this exact ...
1answer
198 views

### Another logic study

I'm working on another idea for a combination logic puzzle, and as before I've been gearing up by creating some studies. This first one came out decently, I think, so I figured I'd share it. This ...
1answer
172 views

### Lost in this Loopy puzzle

I got this Loopy (Cairo) puzzle, but got stuck here: I have no idea how to proceed without guessing with backtracking. Are there any local deductions possible here?
1answer
248 views

### Slitherlink failure - help needed

I have played "slitherlink" (or "Loopy" as it is sometimes called) generally on a 20x25 grid, so I don't finish too quickly. However I have come across a puzzle (seed was not ...
1answer
114 views

### It's all in the 2's follow-up question

This is in regards to the solution in Slitherlink - It's all in the 2s I know it may seem dumb, but I don't understand the logic behind the second 2 chain in the solution. To help provide clarity ...
2answers
131 views

### Next step/strategies for an Area 51 (Slitherlink variant) puzzle

I've been doing quite a few Slitherlinks recently (and puzzles containing Slitherlink elements, such as Area 51). I'm familiar with all the patterns described in the Wiki article but I feel like there'...
1answer
257 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 ...
3answers
1k views

### Hardest slitherlink you know [closed]

What is the hardest slitherlink board you have seen/solved/tried to solve? I've tried googling for some hard ones but came up with simple ones or sites describing what slitherlink even is... So in ...