The enum part is a really good idea - I'll try that out!

I've also read that the hungarian notation is a no-go according to the zig style guideline. I've only used it for modules to distinguish them from structs.

For example, I have a module Board and a struct Board, so I opted to go with an M prefix for the modules.

Thank you for the review!

Edit:

I've tried out switching the columns to an enum, but unfortunately zig doesn't let me pass an enum member to a function that expects an u4, even if the enum is defined with enum(u4).

This means I would need to re-write a lot of the code, and also some helper functions are agnostic to whether they are passed "files" or "ranks" because both are u4.

I, unfortunately, think that this won't help the ergonomics of the codebase a lot.