The Einstein's Puzzle is a well-known logic puzzle. It is often called Einstein's Puzzle because it is said to have been invented by Albert Einstein as a boy. However, there is no known evidence for Einstein's or Carroll's authorship. This puzzle can be modified with various conditions to produce a variety of similar puzzles. For starters, we will solve a simplified version of the puzzle.
There are 5 houses on street which are painted 5 different colors:
In each house lives a person of a different nationality: Brit , Dane , German , Norwegian and Swede .
These people drink a certain beverage: beer , coffee , milk , tea and water .
Smoke a certain brand of cigarettes: Rothmans , Dunhill , PallMall , Winfield and Marlboro .
They keep a certain pet: cat , bird , dog , fish and horse .
None of the owners have the same pet, smoke the same brand of cigarette, or drink the same beverage.
You are given a set of "relations". Each relation connects two identifiers in the owner relationships. For example: "Norwegian-Dunhill" indicates that the Norwegian smokes only Dunhill. "5-dog" indicates that the owner of the 5th house also owns a dog. Similar to Einstein's version of the problem, we will use only these types of relations.
The second argument is a question which you need to answer. The question is represented as two words separated by dash. The first word is a characteristic of the owner while the second is a characteristic ( number, color,nationality, beverage, cigarettes or pet ) you need to determine based on the first characteristic. For example: "horse-cigarettes" asks"What the cigarettes do the owner of the horse smoke?" or "green-number" asks "What is the street number of the green house?".
Input: Two arguments. Relations as a tuple of strings and a question as a string.
Output: The answer as a string.
How it is used: This mission teaches you something about constraint satisfaction problems within the classic context of an Einstein riddle.
All questions have only one possible answer.
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CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.
In order to install CheckiO client you'll need installed Python (version at least 3.8)
Install CheckiO Client first:
pip3 install checkio_client
Configure your tool
checkio --domain=py config --key=
Sync solutions into your local folder
(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)
checkio serv -d
Alternatevly, you can install Chrome extension or FF addon
checkio install-plugin --ff
checkio install-plugin --chromium