I found this system on the Internet:
12 Triple - col. 27, garanzia: minimo 6 punti
www.sistemitotocalcio.it/totocalcio_12tr_27_sist_89.htmand for this same warranty min. 6, I propose a system (A*B) with 24 lines.
System A on 15 numbers in 5 zones with 3 numbers=1x2, with warranty 3if5
Zones:
zone I numbers: 01 02 03 min/max=1
zone II numbers: 04 05 06 min/max=1
zone III numbers: 07 08 09 min/max=1
zone IV numbers: 10 11 12 min/max=1
zone V numbers: 13 14 15 min/max=1
System on 8 lines:
01 05 08 11 14
01 06 07 12 13
02 04 09 12 15
02 05 08 12 14
02 06 07 11 13
03 04 07 10 15
03 04 09 10 13
03 06 09 10 15
...............
System B on 21 numbers in 7 zones with 3 numbers=1x2, warranty 3if7
Zones:
zone VI numbers: 16 17 18 min/max=1
zone VII numbers: 19 20 21 min/max=1
zone VIII numbers: 22 23 24 min/max=1
zone IX numbers: 25 26 27 min/max=1
zone X numbers: 28 29 30 min/max=1
zone XI numbers: 31 32 33 min/max=1
zone XII numbers: 34 35 36 min/max=1
System on 3 lines:
16 19 22 25 28 31 34
17 20 23 26 29 32 35
18 21 24 27 30 33 36
..............
System A*B=8*3=24 lines
01 05 08 11 14 16 19 22 25 28 31 34
01 06 07 12 13 16 19 22 25 28 31 34
02 04 09 12 15 16 19 22 25 28 31 34
02 05 08 12 14 16 19 22 25 28 31 34
02 06 07 11 13 16 19 22 25 28 31 34
03 04 07 10 15 16 19 22 25 28 31 34
03 04 09 10 13 16 19 22 25 28 31 34
03 06 09 10 15 16 19 22 25 28 31 34
01 05 08 11 14 17 20 23 26 29 32 35
01 06 07 12 13 17 20 23 26 29 32 35
02 04 09 12 15 17 20 23 26 29 32 35
02 05 08 12 14 17 20 23 26 29 32 35
02 06 07 11 13 17 20 23 26 29 32 35
03 04 07 10 15 17 20 23 26 29 32 35
03 04 09 10 13 17 20 23 26 29 32 35
03 06 09 10 15 17 20 23 26 29 32 35
01 05 08 11 14 18 21 24 27 30 33 36
01 06 07 12 13 18 21 24 27 30 33 36
02 04 09 12 15 18 21 24 27 30 33 36
02 05 08 12 14 18 21 24 27 30 33 36
02 06 07 11 13 18 21 24 27 30 33 36
03 04 07 10 15 18 21 24 27 30 33 36
03 04 09 10 13 18 21 24 27 30 33 36
03 06 09 10 15 18 21 24 27 30 33 36
..................
edi8