Paper Dice

Paper Dice


This mission is the advanced version of the ' Identify Block ' mission.

You have to write a code to check the development of drawing a dice.

The input represents the development of drawing one dice. It's a list of strings. These strings are of the same length. They consist of 1 to 6 digits and a space. These digits represent each side of the dice.

  • If the development is correct, return True.
  • If the followng cases, return False:
    • You can't complete a cube.
    • The sum of the top and bottom sides doesn't always equals 7.

11 nets of a cube.




paper_dice(['  1  ',
            ' 235 ',
            '  6  ',
            '  4  ']) == True

paper_dice(['    ',
            '12  ',
            ' 36 ',
            '  54',
            '    ']) == True

paper_dice(['123456']) == False
paper_dice(['123  ',
            '  456']) == False

Input: A list of strings.

Output: The answer as a boolean.


  • all(len(row) == len(paper[0]) for row in paper)
  • all((cell in '123456 ' for cell in row) for row in paper)

Invalid hot key. Each hot key should be unique and valid
Hot keys:
CheckiO Extensions

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

checkio sync

(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
checkio install-plugin --ff
checkio install-plugin --chromium

Read more here about other functionality that the checkio client provides. Feel free to submit an issue in case of any difficulties.

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