Many times I read that pepole develop roulette systems using the tabel layout.
Then if zero strike they get a direct loss.
Using the wheels layour some one would reduce the gap when zero strike.
Illustration.
The wheel layout into sector of three - where first sector include zero.
0. 26 0 32 15
1. 19 4 21
2. 2 25 17
3. 34 6 27
4. 13 36 11
5. 30 8 23
6. 10 5 24
7. 16 33 1
8. 20 14 31
9. 9 22 18
10. 29 7 28
11. 12 35 3
Now if we take the bi-modal effect - one sector and its direct oppisite sector we can divide the game as follows.
Bi-modal:
0-6
1-7
2-8
3-9
4-10
5-11
Now assume some one would play 12 numbers - one dozen - then some times if sector 0 is included they will play 13 numbers.
To play 12 numbers we have to use four-angels - the two oppisite and the other two oppiste making in a cross +
0-6-3-9
1-7-4-10
2-8-5-11
Same apply playing two dozen.
For even money bets some one just have to view the last hit sector.
And play that sector and its neighbors and its direct oppisite sector and its neighbors.
Illustration.
23 5 5-11-2-8 A
1 7 7-1-4-10 B W
25 2 2-8-5-11 A W
4 1 1-7-4-10 B W
16 7 1-7-4-10 B L
17 2 2-8-5-11 A
19 1 1-7-4-10 B W
0 0 0-6-3-9 C W
15 0 0-6-3-9 C L
17 2 2-8-5-11 A
15 0 0-6-3-9 B W
3 11 5-11-2-8 A W
12 11 5-11-2-8 A L
29 10 10-4-1-7 A
24 6 0-6-3-9 B W
34 3 0-6-3-9 B L
24 6 0-6-3-9 A
36 4 4-10-1-7 B W
5 6 0-6-3-9 A W
32 0 0-6-3-9 A L
16 7 7-1-4-10 A
4 1 1-7-4-10 A L
Cheers