On Oct 5, 2015, at 0545, andrea crotti <andrea.crott...@gmail.com> wrote:

> Any idea how to make this faster?
> Other advices on the code are welcome as well..

Why not generate the the possible left-hand teams and then cartesian product 
with the leftover players?  E.g., if you want to match 2 on 2 and have players 
A B C D E:

(A,B) cartesian product with (combinations #{C D E})
(B,C) cartesian product with (combinations #{A D E})
and so on with
(C,D)
(D,E)

I think this will generate each possible match exactly twice- mirror images of 
each other, but proof is left as an exercise for the reader.

I would imagine there is a better algorithm for this than mine.

Cheers,

Frank Siler
Siler Industrial Analytics
314.799.9405

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