# 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.

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### Logic Grid Puzzle (Above the Summits, new tips)

UPDATE 20-01-13: I sent an email to the admin of the site, pointing out the problem. The tip 1 has now been corrected and the puzzle can be solved. The "Laundry Time" puzzle I mentioned in this post ...
794 views

### Unsolvable sudoku net with maximum blocks

Definitions For a $9\times9$ grid $G$ (not necessarily respecting sudoku rules), a subset of cells $S$ is defined to be sudoku-friendly if the values in $S$ do not contradict the rules of sudoku. ...
6k views

### How do I reduce a negative hint with multiple possibilities?

This is a hypothetical question about grid-style logic puzzles. I know that when there are positive clues, you reduce the puzzle by eliminating possibilities that don't come in pairs; for example, if ...
108 views

### 4x4 grid challenge

You probably know the classic 3x3 grid challenge, where it’s about drawing one single line that touches all dots in the grid, with only 4 segments (3 turns) on the line. Here’s a little drawing to ...
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### 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, ...
459 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 ...
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### All Aboard the Factorio Train to Far Harad

It’s been a while since you started up your Factorio game and you are trying to remember what you had done with your four trains. Use the clues below to work out which deposit each train is collecting ...
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### Logic Grid Interpretation of Clues (“Above the Summits”)

I have been stuck on this logic grid for a few hours. I don't know how to interpret Clue 4, 5, or 7. What does "next to" refer to in Clue 4? Can I then deduct that Everest is not in America from Clue ...
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### A riddle from Candy Cadet [closed]

I am Candy Cadet, come get your candy here. I have candy all day, everyday. Candy. Candy. Candy. Now I will tell you a story about a young woman who was sealed in a small room. In the room was a ...
272 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 ...
327 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 ...
260 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 ...
373 views

Persons: ...
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### The Guys - Logic #1 - Comics

Welcome to the first in a series of quick logic puzzles. The stories behind the puzzles follow 3 guys who are life long friends, went to school together, and now work in the IT field together in Tampa....
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### The Guys - Logic #2 : Ways to work

So the guys are back. This time, they decide to change up their way to work. Let's see what they're up to... Start the two minute timer... 1. Since Anthony and Charles weren't taking the bus today, ...
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### The Guys - Logic #3 - The Casino

Oh boy, the guys went to the casino.. Let's see what these three are up to tonight. I wonder if going to the casino was a good idea?? Maybe for a couple of them. Start the two minute timer... The ...
174 views

### Every Answer To All Puzzles Here - Secret Found

BREAKING NEWS: The magic stone which reveals all answers on this site has been located! The only known photograph of the stone: The Stack Exchange Adventure Club has received word that the "All ...
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### The Puzzle of Puzzles - Pieces of Logic

The Story Johnny has added several new jigsaw puzzles to his somewhat large, and unusual collection this year. He likes Computer related puzzles, and the outdoors, as well. Your job, Determine each ...
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The Jumbled Story Johnny might have had a couple beers when putting this one together. What he intended was a logic puzzle of friends, their favorite classic computer system, and how they used to ...
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### Hidden Treasure Logic Puzzle

Ok, fellow puzzlers, here is my latest puzzle. They are getting progressively harder. Back Story While snooping around your grandpa’s attic, you came across a bunch of scribbled notes. They were in ...
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### Video Game Auction - Logic Puzzle

Puzzle Difficulty: Very Challenging The Story Johnny loves his classic video games. He has collected most of them. Unfortunately, though, Johnny's Grandmother needs an expensive operation. He has to ...
311 views

### Baggage Mishap Puzzle

This is a puzzle from Braingle: Savannah got distracted when her shuttle arrived at Earth Central Airport. Now she's at Lost & Found with four other travelers all waiting to retrieve one lost ...
635 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, ...
186 views

### Binary Bob's Programming Language Puzzle

Binary Bob Needs Your Assistance Bob's Dilemma Binary Bob is considering going back to school to learn computer programming, however, Bob has been given some jumbled course information. Bob needs ...
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### Shopping Spree - Simple Logic Puzzle

The Hello World of Grid Based Logic Puzzles Shopping Spree Bill and Mary went shopping. They brought home a TV, and a new Tablet, one cost 100, the other 200. One transaction was paid in cash, the ...
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### Can you help our Puzzle Heroe's with their amnesia?

DISASTER HAS STRUCK!!! Our Stack O' Puzzle Heroe's have amnesia! It happened last night, when each one of the puzzle heroes' arch-nemesis defeated them all by giving them all AMNESIA! They all lost ...
198 views

### Logic grid puzzle question: What can I infer from these two negative matches?

I recently ran across a "hint" on a logic puzzle that left me even more puzzled than before. In this puzzle: The hint says that the two negative matches for "Brown" should tell me something about "...
227 views

### 5 ferries, their capacities and ticket price

Five ferries - King's Way, Speedster, Sea Monster, Astar and Blue Surfer operate to Manuchan Island. The capacities of these ferries are 25, 30, 40, 50 and 60, not necessarily in the same order. Each ...
362 views

### Thieves and coffee

A thief has stolen people's coffees, and switched around the prices. Can you help the store manager? These people want a refund. Try to find out which person ordered which coffee, and the ...
141 views

### A Tournament to Remember

The King: Recently we had a big tournament, worth being immortalized in the chronicles of my kingdom. Unfortunately, the court scribe misplaced the record of the final event, and we need to restore it....
596 views

### Who likes Actress E?

This is a logical puzzle that I found, but I can't for the life of me figure out who likes Actress E and hence I'm stuck. The question is as follows : At a movie theatre six people are randomly ...
216 views

### Looking for a logic game 5 people 5 cities

I am looking for a logic game where there are 5 people and 5 cities. They have to travel around the 5 cities but in each city there can only be one person. They move around but they can never be in ...
853 views

### A murder mystery I’ll host at a bar

I’m hosting game night at my regular bar, and I’m gong to stage a murder mystery. Each of the suspect will make 4 statements, one of which is known to be a lie. I tried to construct it as soundly as ...
258 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.
329 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 ...
709 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 ...
143 views

### How to solve this problem easily and quickly [duplicate]

I am unable to make the arrangements when the condition with NOT are given (for example : R does not like cream and black color). Please provide me a way/solution in which such conditions can be ...
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 ...
541 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 ...
1k 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 ...
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### Grid based color changing puzzle

I am trying to identify the minigame used in the game Fontanero (the code for it is here). It consists of a 3x3 grid of squares, and each square is red or green. You can click on a square to invert ...
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### 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 ...
1k 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 ...
3k views

### Cat Breeds - Logic Grid Puzzle

You can play this game here: https://www.brainzilla.com/logic/logic-grid/cat-breeds/ Also available as PDF here. Figure out the age and favorite food of four cats from different breeds. Each cat is ...
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### Interesting logic puzzle grid problem

Here is a very challenging logic deduction puzzle This is not for a graded homework assignment, however it was given to me by a professor for fun. If you post an answer, please discuss how you ...
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### The Gardener's Route

Tell me the method for solving such grid problems in detail. I need a solution for The Gardener's problem.Tell me any method to construct the grid.
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### Floor arrangement based puzzle with two variables

I am trying to solve a mathematical arrangement based puzzle and not able to do it, need help of you guys. Question is relevant to competitive exams in India. Here is the puzzle:- M, N, O, P, Q, ...