I have been surfing the net and I noticed a couple of parlay calculators.

I came up with this for a 4 horse place parlay.

There are 4 Singles
" " 6 Doubles
" " 4 Trebles
" " 1 Accumulator


A
B
C
D

AB
Ac
AD
BC
BD
CD

ABC
ABD
BCD
CBD

ABCD

I'm just not about how to cover the 4 horses in trebles. I don't they are the right combination.

Benny