Tournament grid on Rails?

Question

Ruby on Rails

Good day!
Please tell me a gem for the implementation of the tournament grid on Rails, if there is such a gem.
Grid example: s01.yapfiles.ru/files/1517/setka6.jpg

Answer 1

For tournament grids, you should look at 2 gems:
https://github.com/agoragames/bracket_tree
and
https://github.com/agoragames/seed_list
But of course, you will have to draw the visualization itself, which is not difficult, for example, to do on top of canvas.

Answer 2

This is not a gem, but maybe it will help you https://github.com/morr/shikimori_contests
The repository contains the code for implementing tournaments from this site shikimori.org/contests
one defeat per elimination / round robin when everyone plays with everyone)