Besides:

Add one team so you are even, create the schedule, and anyone playing that team has a bye.

Same number of rounds, same everything; it can't be done more efficiently. It doesn't make a diference.

What's keeping you from creating the follow-up kata?

this is a nice one

It would be more interesting to make a kata for arbitrary number of teams, not only even, so for odd number one team misses one tour...I wanted to do such kata but found this

Nice o_O

even less

Yeeeah! Thats it, man!!! Now 84

There you go

Thanks for inspiration, your 92 characters inspired me to find 87 characters solution. May be someome will beat even this =)

Fair critique, thanks. One of the limitations of codewars is that pretty code gets upvoted more than efficient code.

This solutiom is failed with
[[16,null,null],[11,null,15],[4,null,1]]

Expected: 'null', instead got: '[[16, 0, 15], [11, 5, 15], [4, 26, 1]]'

Please check if you wish

I got it, thanks