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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].

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13 votes
1 answer
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🐍 In the Loop 🐍

Follow the ouroboros down valleys and over mountains. Is it even going anywhere? EDIT (7 days after initial posting): The grid and Penpa+ link have been updated to an easier version, with more numbers ...
DanDan面's user avatar
  • 1,054
3 votes
1 answer
222 views

Impossible pattern in slitherlink

The puzzle here is to analyze the following Slitherlink configuration and show that it is impossible. ...
JCO's user avatar
  • 470
7 votes
3 answers
1k views

Continue a hard Loopy/Slitherlink puzzle without brute-force

This is a classic Slitherlink puzzle from Simon Tatham's Portable Puzzle puzzle collection. I was stuck at the position shown for quite a while until I found a way to continue by logical deduction. I ...
quarague's user avatar
  • 1,863
11 votes
2 answers
714 views

Turn Back the Clocks

This is part 45 of the puzzle series Around the World in Many Days. Each part is solvable on its own. Dear Puzzling, This is a Slitherlink puzzle. Draw a single continuous loop along grid lines that ...
Jafe's user avatar
  • 78.7k
2 votes
1 answer
234 views

Help me with Slitherink puzzle (honeycomb) solution

I got stuck on this level (Honeycomb/Large/Hard/#12) and I always end up having issues with the part that I circled with red because it either wouldn't add up or there would be a space that's not ...
aeriways's user avatar
12 votes
1 answer
260 views

SlitherLITS revisited - Do colour outside the lines

This is a follow-up to SlitherLITS: Don't colour outside the lines After creating that puzzle, I've been wondering whether it was possible to create a SlitherLITS puzzle where all the regions outside ...
fljx's user avatar
  • 16.6k
15 votes
1 answer
388 views

Slither-Yajilink: A match made in Hades

This puzzle is part of the Monthly Topic Challenge #13: Variety Slitherlinks. This is a Slitherlink-Yajilin hybrid. Shade some cells in the grid and draw one non-crossing, non-branching line ...
Jafe's user avatar
  • 78.7k
7 votes
1 answer
373 views

A Watery Slitherlink

This puzzle is part of the Monthly Topic Challenge #13: Variety Slitherlinks. A watermill is going to be built next to a cozy town. You are the designer of the aforementioned mill/slitherlink, and ...
new Q Open Wid's user avatar
14 votes
1 answer
391 views

Double trouble - When slitherloops collide

This puzzle is part of the Monthly Topic Challenge #13: Variety Slitherlinks. What happens when you're working on a couple of puzzles for the Monthly Topic Challenge and try to merge them? Well, in ...
fljx's user avatar
  • 16.6k
10 votes
1 answer
359 views

Walking a twisted path on a donut - a Möbius Slitherlink

This puzzle is part of the Monthly Topic Challenge #13: Variety Slitherlinks. Have you ever wondered why there has to be an "inside" and an "outside" to every slitherlink loop? ...
fljx's user avatar
  • 16.6k
14 votes
1 answer
840 views

Slither-Numberlink: A monstrosity nature never intended

This puzzle is part of the Monthly Topic Challenge #13: Variety Slitherlinks. Rules of hexagonal Slither-Numberlink: Some numbers in the grid are slitherlink clues, some are numberlink clues. Zeroes ...
Jafe's user avatar
  • 78.7k
14 votes
1 answer
524 views

An X x X Slitherlink related to X

This puzzle is part of the Monthly Topic Challenge #13: Variety Slitherlinks. The final answer is a six letter word. Prefer no partial answers. penpa
Amoz's user avatar
  • 27.7k
16 votes
1 answer
730 views

SlitherLITS: Don't colour outside the lines

This puzzle is part of the Monthly Topic Challenge #13: Variety Slitherlinks. Adding a bit of colour to enhance the loopy goodness of a traditional Slitherlink. Draw a single, non-intersecting loop ...
fljx's user avatar
  • 16.6k
17 votes
1 answer
1k views

An oddly coloured slitherlink

This puzzle is part of the Monthly Topic Challenge #13: Variety Slitherlinks. I find something strangely satisfying about a well designed slitherlink puzzle, even one which is oddly coloured and ...
fljx's user avatar
  • 16.6k
12 votes
2 answers
1k views

Slitherlink? I hardly know her!

This puzzle is part of the Monthly Topic Challenge #13: Variety Slitherlinks. Rules of hexagonal Slitherlink: Draw one continuous loop in the grid along dotted lines. The line cannot cross itself or ...
Jafe's user avatar
  • 78.7k
21 votes
1 answer
1k views

The Metaslitherlink

This puzzle is part of the Monthly Topic Challenge #13: Variety Slitherlinks. Below is a grid containing multiple small slitherlinks. These can be independently solved to form clues for the large ...
sarsaparilla's user avatar
  • 6,348
0 votes
1 answer
402 views

Help with slitherlink honeycomb [closed]

This is the best I can do: It makes me think that I'm missing some simple detail.
Power27's user avatar
  • 27
3 votes
2 answers
2k views

Next step in this Slitherlink puzzle (Honeycomb)

I have applied all of the techniques that I know of, and can't figure out the next logical step. I even turned on the visual clues, but it didn't help. What would be the next move without resorting to ...
slinack's user avatar
  • 41
16 votes
3 answers
954 views

PSE Advent Calendar 2022 (Day 5): The Double Slitherlink Experiment

This puzzle is part of the Puzzling Stack Exchange Advent Calendar 2022. The accepted answer to this question will be awarded a bounty worth 50 reputation.< Previous DoorNext Door > 'Twas the ...
sarsaparilla's user avatar
  • 6,348
5 votes
2 answers
841 views

Next step in this Slitherlink puzzle?

I am playing this Slitherlink app on Android, and get stuck on this puzzle at the following state: I made a lot of progress on the right side, but after this I couldn't find anything that I can do, ...
justhalf's user avatar
  • 6,042
7 votes
1 answer
2k views

Is the "rocket" pattern inversible?

The rocket pattern in slitherlink is when a 3 sees a 1 in a diagonal, with two crosses (the exhaust) on the opposite side. 3 x 1 x two lines can be added ...
Mindwin Remember Monica's user avatar
-6 votes
1 answer
214 views

Two Day Slitherlink [closed]

I recently learned what a Slitherlink puzzle is; from here, so I tried my hand at making one! This is a normal 7x7 slitherlink, but with the added restriction that the loop must form the number 2 in ...
Duck's user avatar
  • 3,765
-5 votes
1 answer
205 views

Slitherlink #1 - Very Simple [closed]

This is a simple slitherlink, which is very easy. The rules are as follows (suggested by @bobble and @PuzzlingFerret): There can be multiple loops. The final solution should be a shape. Congrats to ...
ThatBirdThatLearnedToCode's user avatar
20 votes
1 answer
941 views

Slitherlink with a 4

Yesterday, I got my pen-pal to teach me the rules of Slitherlink. I had to use a translator to understand what she wrote though, and as a result I suspect I've misunderstood some of her points. I've ...
infinigon's user avatar
  • 408
3 votes
2 answers
297 views

How to get started on this Slitherlink (No Swiss)?

This is a puzzle from Round 4 of WPF's Puzzle Grand Prix this year. It's a Slitherlink with the additional rule that "Every Swiss cross-shaped arrangement of five cells must contain at least one ...
fish's user avatar
  • 133
20 votes
1 answer
699 views

Slitherknot (Double Slitherlink)

This is a variation on the classic Slitherlink Puzzle. However, instead of creating one loop, you must create 2 separate loops. The two loops can not share any edges, however they can cross or meet on ...
venus's user avatar
  • 647
13 votes
1 answer
431 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 ...
venus's user avatar
  • 647
5 votes
1 answer
268 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 ...
venus's user avatar
  • 647
27 votes
1 answer
732 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 ...
athin's user avatar
  • 34.3k
18 votes
1 answer
669 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 ...
sarsaparilla's user avatar
  • 6,348
13 votes
2 answers
571 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 ...
athin's user avatar
  • 34.3k
15 votes
2 answers
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.
00xxqhxx00's user avatar
  • 2,315
3 votes
1 answer
286 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?
user21820's user avatar
  • 1,236
2 votes
2 answers
380 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'...
Joe's user avatar
  • 5,775
6 votes
1 answer
693 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 ...
user21820's user avatar
  • 1,236
13 votes
1 answer
632 views

Solve this algebraic equation

Wait what? Is there any equation?
00xxqhxx00's user avatar
  • 2,315
22 votes
1 answer
1k views

What's going on with this puzzle?

What is going on with this slitherlink puzzle with clues $2^3$?
00xxqhxx00's user avatar
  • 2,315
11 votes
2 answers
893 views

Slitherlink with so many 2's

Normal slitherlink rules apply.
00xxqhxx00's user avatar
  • 2,315
3 votes
1 answer
436 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 ...
00xxqhxx00's user avatar
  • 2,315
14 votes
1 answer
402 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. ...
Jeremy Dover's user avatar
  • 28.7k
13 votes
2 answers
785 views

Slitherlink (Sheep & Wolves)

Apply Slitherlink rules. In addition, all sheep must be inside the loop and all wolves must be outside the loop.
athin's user avatar
  • 34.3k
43 votes
1 answer
3k 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 ...
Stiv's user avatar
  • 146k
4 votes
1 answer
270 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 ...
Jeremy Dover's user avatar
  • 28.7k
42 votes
2 answers
3k 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 ...
Jeremy Dover's user avatar
  • 28.7k
15 votes
1 answer
788 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 ...
Jeremy Dover's user avatar
  • 28.7k
7 votes
3 answers
1k 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 ...
Nick's user avatar
  • 1,699
18 votes
2 answers
536 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?
Jens's user avatar
  • 8,870
3 votes
1 answer
126 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 ...
Jacob's user avatar
  • 31
7 votes
2 answers
733 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 ...
Martin's user avatar
  • 223
10 votes
2 answers
617 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 ...
athin's user avatar
  • 34.3k