Could anybody tell why that one wasn't correct to remove, please?
I didn't see anything that has two same shapes in same row/column :o
http://prntscr.com/kw688u
This pieces could be removed, but i do not see top of puzzle, so i cannot help more.
Thanks but could developer check that puzzle in Newtown, please?
I think it has bug of some kind? :(
Edit: Not sure if it matters but Tesla puzzle on my dwelling works correctly.