I found this nice wheel on the gambling newsgroup posted by R. Perkis with credit to Nick Koutras. I'm sure it's probably somewhere on this site, but searching for it is time consuming so I decided to bring it up here. I've copied and pasted the relevant information.
A little pricey at $44.00 a crack , but it's only $11.00 @ .50 a ticket if you play the provincials.
With only 3 of the winning numbers among the 12 you
are guaranteed at least 2 - 3# winning tickets.
With 4 of the winning numbers among the 12 picks you
are guaranteed at least 8 - 3# winning tickets.
With 5 of the winning numbers among the 12 picks you
are guaranteed 3 - 4# and 8 - 3# winning tickets.
With 6 of the winning numbers among the 12 picks you
are guaranteed 9 - 4# and 4 - 3# winning tickets.
There is 100% coverage of 3if3, 3if4, 3if5, 3if6,
4if5, 4if6, and 88% coverage of 5if6.
1 2 3 4 5 6
1 2 3 7 10 12
1 2 4 8 9 12
1 2 5 7 8 11
1 2 6 9 10 11
1 3 4 7 9 11
1 3 5 8 9 10
1 3 6 8 11 12
1 4 5 10 11 12
1 4 6 7 8 10
1 5 6 7 9 12
2 3 4 8 10 11
2 3 5 9 11 12
2 3 6 7 8 9
2 4 5 7 9 10
2 4 6 7 11 12
2 5 6 8 10 12
3 4 5 7 8 12
3 4 6 9 10 12
3 5 6 7 10 11
4 5 6 8 9 11
7 8 9 10 11 12
Thanks again Nick
A little pricey at $44.00 a crack , but it's only $11.00 @ .50 a ticket if you play the provincials.
With only 3 of the winning numbers among the 12 you
are guaranteed at least 2 - 3# winning tickets.
With 4 of the winning numbers among the 12 picks you
are guaranteed at least 8 - 3# winning tickets.
With 5 of the winning numbers among the 12 picks you
are guaranteed 3 - 4# and 8 - 3# winning tickets.
With 6 of the winning numbers among the 12 picks you
are guaranteed 9 - 4# and 4 - 3# winning tickets.
There is 100% coverage of 3if3, 3if4, 3if5, 3if6,
4if5, 4if6, and 88% coverage of 5if6.
1 2 3 4 5 6
1 2 3 7 10 12
1 2 4 8 9 12
1 2 5 7 8 11
1 2 6 9 10 11
1 3 4 7 9 11
1 3 5 8 9 10
1 3 6 8 11 12
1 4 5 10 11 12
1 4 6 7 8 10
1 5 6 7 9 12
2 3 4 8 10 11
2 3 5 9 11 12
2 3 6 7 8 9
2 4 5 7 9 10
2 4 6 7 11 12
2 5 6 8 10 12
3 4 5 7 8 12
3 4 6 9 10 12
3 5 6 7 10 11
4 5 6 8 9 11
7 8 9 10 11 12
Thanks again Nick