A +1.5 spread is commonly seen in baseball betting, the standard runline for MLB. This spread means the underdog must win outright or lose by exactly one run to cover the spread. Alternatively, a -1.5 spread means that the favorite must win by at least two runs. Many baseball games are decided by fewer than two runs.
The lucky 31 is a 5 selection bet consisting of 31 bets: 5 singles, 10 doubles, 10 trebles, 5 four-folds and a five-fold accumulator. Named after its 31 parts and the wide variety of bookmaker bonuses to be had, the lucky 31 is a popular wager.