CONDIZIONI: divisione in 10 coppie "a passo due" da 1-2 a 19-20 - esclusione di coppie consecutive.
Sistema già promto
1) 01-02-05-06-09-10-13-14-17-18
2) 01-02-05-06-09-10-13-14-19-20
3) 01-02-05-06-09-10-15-16-19-20
4) 01-02-05-06-11-12-15-16-19-20
6) 01-02-07-08-11-12-15-16-19-20
6) 03-04-07-08-11-12-15-16-19-20

