The empty pet slot must be the fish. And who owns the fish is the answer that you must solve to win the puzzle.
Question: Who owns the pet fish?

This was a lot of fun to figure out and see how different students deduced the answers using different strategies. We just ended up that the German had no pet with the 15 clues given.

Thanks!

1920? ?

The German stole the fish from city of museum.

Interesting thing is that it can be worked out to give the same answer even if you consider the condition “the green house is on the immediate left of the white house” to mean that for someone inside the white, the green house is on its left side.

The change in viewpoint, observer or resident doesn’t take the pond of fish from the german.
However it does give the swede the green house; how environmentally friendly of them. Unfortunately for the germans, there goes their beer too. Coffee will do I guess, the no intoxicating hot stuff.

If you are to consider the alternative viewpoint, like the brit, please be advised to remain as impartial as can be. Or is it the indecision of the unlikely baseball player.

I’ve loved this riddle since the first time I worked through it back in 2014. Today i went back to it again, iw as bored and didn’t remember who the fisherman was. Maybe I hadn’t managed to figure it out then. In any case today I did, talk about a second look.