I think for difficulty 4+ pen & paper is necessary because there are too many constraints to consider, so I made myself a small helper based on rlorenzo's comme

I think for difficulty 4+ pen & paper is necessary because there are too many constraints to consider, so I made myself a small helper based on rlorenzo's comment [0] [0] https://galati.dev/personal/zebra-puzzles-helper https://galati.dev/personal/zebra-puzzles-helper