Same Game Multiples, often called Bet Builders, allow multiple selections from the same sporting event to be combined into a single bet. Instead of betting on just one outcome, you can create a customised combination involving the match result, goals, player statistics, cards, corners, or many other markets.
All selections must be successful for the bet to win, making a Bet Builder similar to an accumulator. The key difference is that every selection comes from the same event.
Imagine a football match where you choose:
These selections are combined into one price calculated by the bookmaker.
If every prediction is correct, the bet pays out according to the combined odds.
If any selection fails, the entire bet loses.
Bet Builders allow bettors to create personalised combinations that reflect how they believe a match may unfold.
Rather than selecting unrelated matches, every prediction contributes to one overall match narrative.
For example, a bettor might believe:
Combining these outcomes often produces higher displayed odds than betting on any one selection individually.
The most important concept in understanding Bet Builders is correlation.
Correlation describes whether two events become more or less likely to happen together.
Independent events do not influence each other.
For independent selections, the combined probability is simply the product of the individual probabilities.
Many selections within the same football match are positively correlated.
For example:
If Team A wins, Player X is generally more likely to have scored than if Team A loses.
Because the outcomes are connected, their combined probability is different from simply multiplying two independent probabilities.
Some outcomes make each other less likely.
For example:
These selections clearly conflict, so combining them would not be realistic.
Bookmakers use sophisticated statistical models to estimate how different markets interact.
Rather than multiplying the individual odds directly, they adjust the final price to reflect the relationship between the selections.
This process is known as correlation modelling.
Because these models are proprietary, the exact calculations are not publicly available.
The adjusted odds therefore reflect both the individual probabilities and the bookmaker's estimate of how strongly the selections are connected.
Each market already includes bookmaker margin.
When several selections are combined, those margins accumulate.
For example, if each individual market has an effective value of 95% after accounting for a 5% bookmaker margin, then a five-selection combination has:
0.955 ≈ 0.774
The combined effective margin becomes:
1 − 0.774 = 0.226
or approximately 22.6%.
When correlation adjustments are also applied, the final offered price may differ further from the simple multiplication of the displayed odds.
Evaluating a Bet Builder is considerably more difficult than evaluating a single bet.
A proper assessment requires estimating:
This makes Bet Builders one of the more mathematically complex betting products available.
Same Game Multiples demonstrate an important concept in probability: events within the same match are often interconnected.
Understanding correlation helps explain why combined odds cannot simply be calculated by multiplying individual prices.
For analysts, recognising these relationships is valuable when studying probability models, even outside the context of betting.
Same Game Multiples combine several selections from a single event into one bet. Unlike traditional accumulators, many of these selections are correlated, meaning the outcome of one affects the likelihood of another. Bookmakers account for these relationships using statistical models while also applying bookmaker margin across the combined wager. Understanding correlation is essential for interpreting how Bet Builders are priced and why their odds differ from a simple multiplication of individual selections.
