What is a Lucky 31 system?

A Lucky 31 system consists of 31 bets which transpire from 5 picks. One single bet per pick, ten 2-pick multis (parlays), ten 3-pick multis (parlays), five 4-pick multis (parlays) and one 5-pick multi (parlay). At least one of the five picks must be correct to gain some winnings - the exact amount of the winnings depends on how many of the predictions prove correct.