Played until level 30 -> no archivments

https://i.gyazo.com/0095cdd246ecc8c1bd6bd19c4d1e5704.jpg It seems to be impossible to position one of the horses in the outer corners. What am I missing?

I finished all the stages. But no achievements have been achieved since 50 stage.

Really enjoyed these types of chess inspired games Others I've enjoyed are https://store.steampowered.com/app/1338980/Chess_Knights_Viking_Lands/ https://store.steampowered.com/app/1485580/Chess_Valley/ https://store.steampowered.com/app/575340/Chessaria_The_Tactical_Adventure_Chess/ https://store.steampowered.com/app/415910/Gigachess/ https://store.steampowered.com/app/1524690/Chess_Brain_Dark_Troops/...

This is fun.