Hello Michel,

On Sat, Feb 23, 2019 at 04:36:24PM +0100, Michel Haber wrote:
> I am looking for feedback in order to improve my Haskell code on
> all levels. [...]

Minor lint suggestion: why

> main :: IO ()
> main = do
>     let size = read input
>     let rules = stdRules size
>     let initial = map read . words $ start
>     let game = advance rules stdNeighbors
>     loop game initial

instead of?

>     let size = read input
>         rules = stdRules size
>         initial = map read . words $ start
>         game = advance rules stdNeighbors

Other than that, code is readable and clear!
-F
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