the random tests were calling the reference solution. fixed.

Good Find! Fixed.

Already raised as an issue here

Fixed. Remember to hit RESET to see the updated code of example tests.

I agree with you, however, this is a beginner-level exercise, so I believe that understanding the necessity of using a Map/Dictionary is part of the exercise. Just my perspective

fixed

no answer from OP

what does "is missing the function name" mean, could you be more precise ? is this about the sample tests or the full tests ?

Thanks for the comment. Much appreciated!

There are some kata similar to what you suggest. Check out these:

"Check and Mate?"

"Is the King in check ?"

"One line task: Is the King in check ?"

"Explain the Algebraic Chess Notation"

"Find the Final Position"

Enjoy!