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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.lang.python
Subject: Re: (Mastermind) puzzle (with 3 digits) (Posting On Python-List
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Date: Thu, 14 Mar 2024 05:53:53 -0000 (UTC)
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On Wed, 28 Feb 2024 17:29:54 +1300, Greg Ewing wrote:

> This is not correct. score((1,1,1), (1,1,2)) gives (2,4). According to
> the usual rules of Mastermind, it should be (2, 0).

How about this as a more general Mastermind scoring function, then:

def score(candidate, answer) :
    return \
        (
            sum(a == b for a, b in zip(candidate, answer)),
            sum
              (
                i != j and a == b
                for i, a in enumerate(candidate)
                for j, b in enumerate(answer)
                for s in (set(i for i, (a, b) in enumerate(zip(candidate, answer)) if a == b),)
                if i not in s and j not in s
              )
        )
#end score