Questions tagged [logic-grid]

Logic grid puzzles, first produced by Lewis Carroll, are puzzles in which correspondences must be drawn between multiple ways of describing the same list of objects, using a given set of clues about these correspondences. Such puzzles can be solved using a grid, but for pre-existing grids whose elements must be filled using logic, use the [grid-deduction] tag instead.

Filter by
Sorted by
Tagged with
23
votes
4answers
2k views

Art Accident at Airport!

There was an accident at the airport! A hanging art installation fell and landed on some passengers. In addition to tearing up all their tickets and mixing up their luggage, six people sustained ...
18
votes
1answer
2k views

The Pirates of Beal Isle - very long logic grid puzzle

Story Let me tell ye a tale: Somewhere northeast o' the Bahamas there be a tiny scrap o' rocks stickin' up out o' the sea known as Beal Island. It be a barren, rocky place, and no man ever called it ...
16
votes
3answers
3k views

Which lorry is carrying drugs?

Five lorries are parked in a French layby, having recently come off the ferry at Calais. The police know that the lorry headed for Lisbon is smuggling drugs, but they're not sure which one it is. All ...
16
votes
4answers
13k views

Fast strategies for solving Einstein's puzzles?

The Einstein's puzzle or zebra puzzle is a well-known logic puzzle. Are there any very easy ways to solve it fast?
16
votes
1answer
775 views

Difference grid

Rule : A cross sign means one rectangle's number is the multiple of another one. A line sign means one rectangle's number is adjacent to another one. Example : The Puzzle : The numbers must be ...
14
votes
2answers
1k views

How many clues are required to ensure Einstein's Puzzle is solvable?

I used to play Einstein's puzzles a lot when I was younger, and very quickly learned to assess quite rapidly whether I thought a puzzle would be a quick solve or more time-consuming, but I never ...
14
votes
1answer
430 views

The Roman Crypto

This was found engraved into a stone in Roman times: And underneath, an inscription: eoofrddene·en.do·xfrtfscqqiiut·iucraeiuioceaarriocsrt·s·ieaei,imt·oesa·serism?·,· Even with only this minimal ...
14
votes
1answer
477 views

Megan and the rambling reshuffle

When I met Megan the other day in Starpounds, she was not her usual calm self. "Goodness, what a shake-up! Everyone shifted from one job to another..." "The Cabinet reshuffle?" "Blithering ramblers!...
14
votes
1answer
320 views

Lenny’s Logical Internship

Lenny recently applied for an internship at Logicorp™, a company built around using logical reasoning to solve any sort of problems their clients face. The interview was long and difficult, and Lenny ...
13
votes
3answers
1k views

A Day at the Zoo

You find a note on your door when returning home. It tells you to check your email and find the hidden message. Upon inspection, there is a mysterious email in your inbox. From: ...
12
votes
2answers
481 views

The Grand Grid II

Have a look at the first Grand Grid to get an idea of the basic concept Each Grand Grid involves you discovering clues that allow you to solve a logic grid puzzle. The second in this series will be ...
12
votes
1answer
6k views

Write digits 1 to 9 in the table, each pointing to next 3x3 grid

Write 1 to 9 digits in an empty Sudoku table with these rules (similar to 9-Queen problem): There are 9 Boxes indexed from 1 to 9 in the image below. and each box has a 3x3 grid child. Every two ...
12
votes
1answer
676 views

Murder Mystery - Murder at The StackO Ave Tavern

Murder at The StackO Ave Tavern Each Saturday Night the local bar, "The StackO Ave Tavern", hosted a Poker Party. And each week, me and three of my buddies attended the event. Until this ...
11
votes
11answers
3k views

14 crosses in a 6 by 6 grid

Can you put 14 crosses in a 6 by 6 grid so that there are an even number of crosses on each row and column? An elementary school teacher asked me for help with this. Below is a photo of the book they ...
11
votes
1answer
3k views

Meeting Room - a harder variation of the classic Zebra Puzzle

You can play it online here: https://www.brainzilla.com/logic/zebra/meeting-room/ ...
11
votes
2answers
477 views

Setka - Complete grid using clues and sudoku-style logic; Theme - Halftime

This is a Setka puzzle; you can find more (along with a more detailed explanation of the rules) at our website, linked from our profile. How to play Setka, the short version: Answer each clue using ...
11
votes
2answers
712 views

Fill the squares with the right tetrominoes

Fill the squares with the right tetrominoes, so each tetromino contains numbers 1 to 4. Example :
11
votes
1answer
1k views

How do I solve this logic puzzle?

I am trying to improve my logical thinking and I came across this puzzle problem. I need some help solving the puzzle below. Two weeks ago, four enthusiasts made sightings of objects in the sky in ...
11
votes
3answers
1k views

My version of the Einstein Riddle

Below is a puzzle that I have created, with great inspiration from the Einstein Riddle. There are 5 houses, each house has one unique owner (for the sake of clarity, let's assume that the owners are ...
11
votes
1answer
354 views

The Grand Grid I

This is the first in a series I am calling The Grand Grid. Each involves a logic grid puzzle that is solved by gathering clues presented in variously obscured forms. The description of the grid puzzle ...
11
votes
1answer
406 views

What is the smallest rectangle containing the squares of 1 through 100?

Let us suppose that we have an $m\times n$ grid such that every element is a digit in base $10$. Then we can read the numbers from a grid such that we fix a starting element and go to one of the eight ...
10
votes
1answer
652 views

Girl Hackers - Logic Puzzle

StackExchange Top Ranked Girl Hackers The Stack Exchange Hacking Federation (of course fictitious) has just released its list of top-ranked female hackers for the year. Using only the clues below, ...
10
votes
2answers
2k views

When and where was the first logic-grid-based puzzle published?

Logic puzzles with a set of conditions and a "logic grid" are very popular. More than one publisher is currently producing puzzle books with these types of puzzles. A Wikipedia article claims ...
10
votes
1answer
244 views

Puzzling comes from within

People often say that the power to do things comes from within. In this puzzle, maybe I have taken that a bit too literally... I'm sure you will be able to find the sentence hidden inside this image. ...
10
votes
1answer
323 views

How the snake laid down in the ground

This my puzzle is inspired by this puzzle. A sleeping snake has 36 consecutively numbered segments. It is hidden in a 6x6 gridded square ground. Each snake's segment fits exactly in 1 grid square. ...
10
votes
2answers
325 views

Adventure of LALO : Open the Stargate Portal

While exploring a remote island under the project "Search for Knowledge Program", Archaeologist "LALO" has found a hidden stargate which will open a portal to the Knowledge Dimension. In order to ...
9
votes
2answers
1k views

Athletes at the Rio Olympics

This is an entry in the 13th Fortnightly Topic Challenge. The little country of Asrius finally made it into the Olympics game! Yay! CROWD CHEERING!!! Five competitors from this country (Martin Fuis,...
9
votes
2answers
2k views

Integer grid problem

I found this programming related problem too difficult for me. The problem asks to find 16 integers and form a 4x4 grid $$\left(\begin{array}{cccc} n_1 & n_2 & n_3 & n_4 \\ n_5 & n_6 &...
9
votes
1answer
287 views

Pizza and Subs - Delivery Dilemma

The Delivery Dilemma The local pizza joint delivered pizza and subs. Three employees were hired to deliver: John, Heather, and Luigi. Based on the following statements: If John delivered pizza, then ...
9
votes
1answer
335 views

A Grave Issue Discovered

In the town of Fairfield (There are 35 Fairfield's in America), there is a graveyard. In 1874, the mayor, Arthur Hither, declared that 25 new graves be created, in a square. Five years later, he was ...
9
votes
1answer
603 views

solving a logic grid puzzle

This is a puzzle from mysterymaster. Five students of twentieth-century literature (Oscar, Peter, Shirley, and two women named Ruth) elected to write their term papers each on a different work of ...
9
votes
1answer
187 views

Puzzle of the day - three in one Sudoku?

A three in one sudoku. Have fun
8
votes
4answers
1k views

Trick or Treating in Trutham-And-Ly

An entry in the 19th fortnightly challenge... Trutham-And-Ly, you may remember, is a small town in the north of Logistan. It is divided into two districts, Trutham and Ly, separated by a small stream....
8
votes
2answers
2k views

Can you solve the 7x7 (sudoku-ish) centered sums puzzle

I have come across this puzzle a few times in competitions and rally's, and it has troubled me because I cannot seem to find a good approach to solving it, either programmatically or numerically. And ...
8
votes
1answer
2k views

Eight animals are sitting around a circular table

Eight animals named E, F, G, H, J, K, L and M are sitting around a circular table facing the centre. These are the kinds of the animals: Cat, Cobra, Dog, Elephant, Falcon, Llama, Panda and Sparrow (in ...
7
votes
2answers
2k views

Find the Distance

The distances from you to some certain cities are written below: BERLIN 200 miles PARIS 300 miles ROME 400 miles AMSTERDAM 300 miles CARDIFF ??? miles ...
7
votes
2answers
1k views

Who owned each heirloom?

At the dinner party were Lady Winslow, Doctor Marcolla, Countess Contee, Madam Natsiou and Baroness Finch. The women sat in a row. They all wore different colors and Doctor Marcolla wore a jaunty ...
7
votes
2answers
656 views

Five Cousins Camping

Five cousins are camping together. Two are from Montana, and three are from Wyoming. Two are Pattersons, and three are Andersons. Irene and Yvonne are from the same state, while Michael and Emily ...
7
votes
2answers
545 views

Enlightened, Part II: A Curious Courtyard

If you care about the story, you may want to see Part I if you haven't already. Otherwise, just enjoy the puzzle! Ricky: Chris! Chris: What is it this time? Ricky: We have another problem. Chris: ...
7
votes
1answer
778 views

Queens full of jacks

(Note: I doubt that this puzzle is complex enough to post it here, but I still took a try.) There are 3 queens and 2 jacks (a full-house combination from poker) taken from a deck with standard suits, ...
7
votes
1answer
264 views

What two numbers need to be removed?

What two numbers need to be removed? The first one from the left circle, the second one from the right.
7
votes
1answer
242 views

A group of friends at a restaurant.

Four groups of four friends each are having dinner at a restaurant. There are four tables, table A, B, C, and D, seating four each, arranged in a square like so. A B C D Each table looks like this. ...
7
votes
4answers
605 views

'Companion Planting' Logic Puzzle - Is there an elegant solution?

Problem: You're a vegetable gardener planning to plant out seedlings in a new garden bed, however your farmer's almanac has outlined a system of rules about what plants can and cannot be placed next ...
7
votes
1answer
186 views

Montague Island Mysteries Logic-Grid Puzzles

I'm working through the logic-grid puzzles in the book called "Montague Island Mysteries" by R. Wayne Schmittberger. The particular puzzle I'm on is Puzzle 5.3 where breakfast guests choose food ...
6
votes
4answers
771 views

Logic problem about five thieves

The teacher of my nephew (15y) proposed the following puzzle to the students. I solved it, but I found it extremely difficult, in particular for teenagers. Perhaps there is a simpler solution than ...
6
votes
4answers
1k views

5x5 statement table

Statement table. 3 2 1 4 1 2 3 3 3 3 3 4 6 4 4 2 3 4 4 3 1 1 2 4 3 Above 5x5 table contains numbers. A number at each cell represent a statement. x : This ...
6
votes
2answers
2k views

Who killed Boggs? A chandelier’s view

Source: Condensed from "Murder Ink" by Dilys Winn Boggs has been found dead in the club lounge, his iced tea poisoned. Four men, seated on a sofa and two chairs in front of the fireplace, are ...
6
votes
2answers
285 views

Top Game Developers

Top Game Developers Back Story Okay fellow puzzlers, I hope you packed your lunch, this one is my most challenging puzzle to date... Johnny is writing an article about some of the top-selling ...
6
votes
1answer
146 views

Puzzle - Snow Day Event

Daisy, Delilah, Donny, and Duke have each decided to participate in the snowperson building event. In decorating their snowperson, each of them has chosen a different colour of the scarf from purple, ...
6
votes
2answers
289 views

The CompuTaria Quest - A young Wizard's journey

Once Upon A Time In A Land FAR, FAR Away... Our adventure begins in the enchanted land called "CompuTaria". You are, "Binaryian" a 3rd year Wizard In Training. Today began like any other day - you ...