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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14
votes
4answers
11k 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?
6
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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 ...
14
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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 ...
9
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1answer
323 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 ...
22
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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 ...
16
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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 ...
14
votes
1answer
453 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!...
8
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1answer
247 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
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1answer
3k 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 ...
3
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2answers
749 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. ...
0
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1answer
1k views

Einstein's puzzle [duplicate]

There are 5 houses in 5 different colours. In each house lives a person of a different nationality. The 5 owners drink a certain type of beverage, smoke a certain brand of cigar, and keep a certain ...
-5
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1answer
109 views

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, ...