The proper name for 'relatively prime numbers' is 'coprime numbers', so you can change the title if you want ;)

I am trying the Haskell version and don't know what to make out of this.

Falsified (after 3 tests and 1 shrink):
0
[-1]

No info on what the input, expected and actual results are. Please rectify.

need random tests.

Java fork

• Random tests
• added fixed test of 2 step move
• Updated to Junit 5

Java: no random tests.

Sample and fixed test such as "b4 d6 b6 g6 g3 e4\" should be added to invalidate solutions that allow 2 pawn moves to be made after 1st attempt

Description should be language-agnostic

Description should be language-agnostic

Description should be language-agnostic

Ruby 3.0 should be enabled, read this to learn how to do it

Please organize the structure of test fixture as following (although it has been mentioned in the attached link, I'm repeated here again)

describe "<This message should describe the categories of test groups inside this block>" do
  it "<A short message describing this test group>" do
    expect(...).to eq(...) #Assertions
    #Or Test.assert_equals(user_response, reference_response)
  end
end

Ruby 3.0 should be enabled.

Java translation submitted

Please use new python test framework.

Can you approve my CoffeeScript translation ?