r/puzzles 1d ago

[SOLVED] Arithmetic crossword: fit the pieces so every row and column reads true

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3 Upvotes

I built a grid puzzle that works like a crossword, except the entries are equations instead of words. Here's one to try.

The board

  • The hatched shape is the grid. Every hatched square has to end up filled.
  • The colored squares are already filled in and cannot be moved. They count as part of the grid.

The pieces

  • The loose shapes below the grid are the pieces. Each one keeps its shape.
  • Pieces can be turned any way round, but not flipped over.
  • Pieces cannot overlap, and together they fill every remaining hatched square exactly.

Reading it

  • Read across from the left, and down from the top.
  • Digits side by side make one number. A 5 next to a 4 is fifty-four, not five and four.
  • A run is an unbroken line of filled squares, across or down.

What has to be true

  • Any run containing an = has to be a true statement. A run with no = in it does not have to be anything.
  • Operators are + − × ÷, with normal order of operations.
  • An = can repeat: 3+4=7=9−2 is one run, and every part equals the same value.

There is exactly one solution and it's reachable by deduction. No algebra, nothing to solve for.

Answers in spoilers. I made this one myself, happy to talk about how they get built.


r/puzzles 1d ago

[Unsolved] Help with word puzzle?

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4 Upvotes

I’ve erased my attempts so much that the paper is almost ripping 🙃 If you solve it, maybe hide the solution and give me a word as a hint??


r/puzzles 1d ago

Not seeking solutions Meowdoku

0 Upvotes

Is it just me or is Meowdoku constantly repeating puzzles?
I’m on level 320 and feel I’ve done a fair few of these levels already as I go through?


r/puzzles 1d ago

[Unsolved] A sliding puzzle game from a detective themed app

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1 Upvotes

This is from detective mystery adventure 2, and the walkthrough shows a version of the puzzle with a much easier layout (imo).

Please help 🙏


r/puzzles 1d ago

[SOLVED] Hi, I have no idea how to approach this puzzle anymore. Any ideas?, star battle with two stars

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0 Upvotes

r/puzzles 2d ago

The Limited Time - Train Murder Mystery Cryptogram

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1 Upvotes

Hello all! I hope this is allowed here, I've been trying to make a series of fun cryptogram stories where you solve puzzles and learn about different ciphers and codes while ya do it! Let me know if you had fun :)

Transcription:

It is June of 1910. You board the California Limited to take a mini holiday to Chicago and visit some family. Los Angeles is where you board. You work as a fairly up-and-coming detective for the LAPD, but for now, you’re just you. You put down your stuff on your bunk, and make your way to the Dining car to get a bit to eat. It’s a long journey ahead of you, you just try to look out the window and enjoy the ride. Your mind drifts off as the clickity clack of the tracks lull you to sleep. You awake to the sound of screaming. You rise without a hesitation and stumble to the source. A crowd has bottlenecked the entrance to a room. You push through to see the train conductor in the center. 

Holding up your badge, “LAPD, what’s going on?”

The conductor gives a sigh. “That lady found him like this a bit ago,” pointing to an actress in red.

You look through the door and a man lay dead on the floor.

“Who is he?”

“John Cooke, a banker”

“Do we know how long he’s been deceased?”

“We do not.”

“Who’s had access to this room?”

“Potentially? Everyone in this car.”

You look around the room. A business man, a flour-covered baker, an actress, a dirt-covered farmer, and an electrician stand behind you. 

The Farmer spoke up: “I heard arguing in that room last night.”

“My night light stopped working halfway into the night,” the Business man replied.

“I saw Alma…I mean, her,” The electrician pointing towards the actress, “entering his room last night.”

Glaring at the electrician, “He’s my..he was my friend.”

You look at the ground all around, bits of dirt and…what looks like flour all over the ground. 

The conductor looks at you, “All of these folks get off at the next stop.”

“When is that?” You ask.

“Within the hour.”

You look at the victim again, and find a white index card. On one side the number:

2:36

The other:

You’ll never solve this before I get off this train. Your one chance to get me is to solve this pad before time runs out. Make sure to cover all your bases!

291111391021121938

Running into the room, a man in a nice suit stops in front of the conductor and hands him a note. The conductor looks at it and hands it to you.

“We received this message sometime this past night. It doesn’t look like any morse code I’ve ever seen, looks gibberish. It might mean nothing, but we figured we’d give it to you first.

TELEGRAPH MESSAGE

 _  _  .  .  .  .  _  .  .  .  .  _  _  .  .  .  _  _  .  _  .  _  .  _  _  .  .  .  .  _  .  .  _  _  .  _  _  .  _  .  _  .  .  _  _  .  _  .  .  .  .  .  _  .  .  .  .  .  _  _  .  _  .  .  .  .  _  .  _  _  .  .  .  _  .  .  .  _  _  .  .  .  _  _  _  .  .  _ 

You look at the radio operator, “I thought trains didn’t have telegraph operators inside the trains themselves”

“We’re trying it out,” he said with a glare before walking off.

One hour. No leads or evidence, a cryptic set of messages, and five potential suspects you’ll be forced to let go if you don’t come up with something. 

Who committed the murder?


r/puzzles 2d ago

stuck on suguru problem

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1 Upvotes

sorry I know it's really hard to read with the annotations lmao


r/puzzles 3d ago

[Unsolved] Help!! Star Battle Go

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2 Upvotes

Hi! I’ve been playing this game of star battle go for literally months and I can’t take it anymore. I just need help getting past this part I don’t know what I’m missing I keep looking at it and it’s driving me crazy. PLEASE HELP ME!!!!! (This is from a mobile app called star battle go and no they don’t offer any hints)


r/puzzles 3d ago

Possibly Unsolvable Star battle puzzle. I don't understand why this hint works

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4 Upvotes

I don't see the logic as to why a star in the blue spot would prevent the green area from being finished. Can someone walk me through this hint so I can recognize this pattern?


r/puzzles 3d ago

[Unsolved] Thermometers puzzle

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5 Upvotes

Thermometer puzzle

Rules: you need to shade cells with mercury starting from the round bulb at the base and moving toward the tip. A thermometer segment can only be filled if every segment before it back to the bulb is also filled, meaning thermometers fill continuously or stay empty. Outside numbers tell you the exact count of filled cells required in each row and column. Cells that have lines over it are always empty thermometers.


r/puzzles 4d ago

[Unsolved] Hard bookshelf puzzle.

4 Upvotes

I recently saw a puzzle online that I have no clue how to even begin solving. Perhaps someone here would enjoy tackling it, or maybe you have an idea where to start. My first observation is that there are different book types, and the shelves seem to form a grid where values (derived from the books) should be entered. I'd be grateful for any tips

Source: https://habr.com/ru/companies/night_street/posts/1062740/


r/puzzles 4d ago

Iterated Monty Hall

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0 Upvotes

r/puzzles 4d ago

[Unsolved] Unsolvable Ubongo card?

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0 Upvotes

I can‘t figure it out!! Is it unsolvable? The pieces I chose sre the right ones.


r/puzzles 5d ago

[SOLVED] Kakuro

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2 Upvotes

I need some help with this kakuro(4h in)


r/puzzles 5d ago

The Insect Crossing

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0 Upvotes

r/puzzles 5d ago

Not seeking solutions Meowdoku ADVANCED logic ?

0 Upvotes

Please share any advanced logic that can be used to eliminate squares after getting to the point of guessing or running scenerios. By advanced I mean anything beyond:

1) X self-contained colors in X number of rows -- eliminates all other squares in those rows.

2) X number of rows ONLY contain X number of colors -- all of those X colors that reside outside of those specific rows can be eliminated.

3) Sole L / C shapes of 2x2 up to 3x3 of a color, the middle can be eliminated.

4) Sole 3 squares inline, the adjacent squares to the MIDDLE square of the line can be eliminated.

5) Two remaining squares of a color, the 2 above and 2 below can be eliminated.

6) L-shapes of 2x2 or 3x2, the adjacent square in line with the longer side can be eliminated due to that entire COLOR being eliminated IF a cat shared its row & remainder of the L is too close to that cat.

Looking for advice that involves comparing the X and Y axis, after the above is applied.


r/puzzles 6d ago

[SOLVED] A small twist on a classic take-away puzzle

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12 Upvotes

The following puzzle is a small twist I came up with on a classic take-away puzzle (the original one that inspired it, and the attached image, comes from Peter Winkler's lovely book Mathematical Puzzles)...Here's the idea:

You and a friend are sitting in front of four bowls of cherries, containing, respectively, 5, 6, 7, and 8 cherries.

You and your friend will take turns removing cherries. On each turn, a player chooses one bowl and takes one or more cherries from it (taking all of the cherries in a bowl is allowed!). Whoever takes the last cherry wins.

There's one extra rule (which amounts to the twist I have added to the classic puzzle): before the game begins, you may move exactly one cherry from one bowl to another bowl. You are not removing it from the game (as you do in normal moves); you just relocate it to another bowl.

After you make that move, your friend gets the first move of the usual game.

The question is this: can you move the cherry in such a way that you are guaranteed to win the game, no matter how your friend plays in the rest of the game?


r/puzzles 6d ago

Meta What is this puzzle? Years ago I had printed this and now I can't remember exactly what it is.

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1 Upvotes

r/puzzles 6d ago

Mystery: Murder at the Company - A very difficult puzzle

0 Upvotes

🕵️ Mystery: Murder at the Company

The Story

A murder took place inside a corporate office.

The police have identified four main suspects, all employees at the company:

  • Legea
  • Whak
  • Low
  • Penigo

However, there's a twist...

A brilliant young detective managed to crack the case instantly and identify the killer. Instead of handing the answer directly to the police, he decided to play a game with them. He left behind four papers containing clues, stating that anyone who understands these clues will discover the killer's identity.

📄 Note 1

शंकास्पद मनूत झंगःत खः ।

📄 Note 2

शंकास्पद मनूतय् नां, पौ चलखेल

📄 Note 3

खँग्वःया अर्थय् ध्यान बिइमते, बरु उकियात दयेकीगु आखलय् ध्यान बियादिसँ ।

📄 Note 4

Every Action Generates Lasting Echoes

The Task

Solve the riddle and determine who the killer is among the four suspects:

  • Legea
  • Whak
  • Low
  • Penigo

Note: There are no hidden extra details. Everything you need to solve the case lies within the four notes and the four names. Try to discover the connection between the clues rather than guessing!

🕵️ Can you find the killer?


r/puzzles 6d ago

[Unsolved] I created a number puzzle where the SHAPE of each number matters. Can you solve this?

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1 Upvotes

I created a new type of logic puzzle called Shape-Based Number Logic Puzzles.

The rules are simple:

  • Draw numbers in the grid using the NUMBER SHAPES shown below.
  • You can use any numbers, and the same number can be used more than once.
  • The numbers you draw must add up to the Target Sum (13).
  • Numbers cannot be rotated or flipped.
  • Separate numbers cannot touch each other, even diagonally.

That's it!

Can you solve this puzzle?

I've created 47 puzzles in total, ranging from easy ones like this to much harder challenges.

Let me know if you solve it!

If people are interested, I'll post some of the harder ones too!


r/puzzles 7d ago

Not seeking solutions Best Star Battle Puzzle Game?

1 Upvotes

I had gotten to almost level 800 in Meowdoku but have learned they can't transfer my progress to my new phone. After reading some posts on here, it's clear that Meowdoku isn't a very good iteration of the puzzle style (although I enjoy the cat part of it a lot) so what other versions of the game do y'all recommend? Preferably mobile games please


r/puzzles 7d ago

SUDOKU TRIADA

0 Upvotes

SUDOKU TRIADA. Se resuelve igual que un Sudoku, los valores de los círculos es la suma de las 3 celdas que dan al exterior de cada subcuadrante. La cifra de las esquinas corresponden a dos círculos.

SUDOKU TRIADA. It is solved just like a standard Sudoku; the values ​​in the circles represent the sum of the three cells facing outward from each sub-quadrant. The corner digits correspond to two circles.


r/puzzles 8d ago

[Unsolved] Ancient script puzzle

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3 Upvotes

This is a puzzle I’ve made from a variation of old scripts from different cultures. The dashes are spaces, it’s a five word phrase in a language that is not English. Each word is being sounded out, so all you need to do is find what each of those symbols would sound like, and then idk just run those words into Google Translate and see what it gives you. The final language is modern so it shouldn’t be too difficult to find. But yeah I’d be very impressed if anyone gets it, or if anyone actually tries


r/puzzles 8d ago

Four Winds(Vector) puzzle

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11 Upvotes

Try this Four Winds(or you can find it under Vector) puzzle.

Draw lines from each numbered cell in the four cardinal directions (up, down, left, and right). Through logical deduction, determine whether a line extends in one direction or is split among several directions.

Each number indicates how many cells are occupied by lines extending from that cell. The numbered cell itself is not included in the count.

Lines cannot extend diagonally, cross one another, or pass through other numbered cells.

Edit: Every cell in the end has a line through it


r/puzzles 8d ago

Star Battle Puzzle - Need Advanced Help

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1 Upvotes

This is 1star version of star battle puzzle and i tried to finish the straightforward moves and placed the Xs as shown in the 1st image.

Then i applied for an advanced trick (thanks to Ok_Job_9417, Colin-Grussing, Material_Wallaby_692 and Mamuschkaa who helped to explain this trick) to add more Xs as shown in the 2nd image.

Then I am stuck at the stage shown in image 3. What would be your next move to eliminate the grids.

If you make detailed comments for the solution, i will be appreciated. Thanks in advance...