System Basics
A system bet places multiple permutations across your selections (e.g., all doubles and trebles from four picks). You pay for each combo as a separate unit. The trade-off is **higher total stake** for **reduced all-or-nothing risk** versus a single accumulator.
Popular Systems (Matrix)
No singles. One loser may still return via surviving doubles.
Singles added — higher cost, better protection.
No singles. Strong mid-coverage; costs 11 units.
Adds singles; some books offer bonuses on all-correct/one-correct.
Heavy cost; ensure each leg is genuinely +EV.
Very expensive; correlation and margin drag can dominate.
Cost & Payout Math
Total unit cost equals the number of combos. For n selections and k-folds:
Units = Σ C(n, k) for each included k (e.g., doubles k=2, trebles k=3, etc.).
Payout sums returns from each winning combo. A single loser may still pay if other legs form winning doubles/trebles.
Example — Yankee (4 selections, 11 bets)
- 6 doubles, 4 trebles, 1 fourfold. Stake per bet = 1 unit → Total stake = 11 units.
- If one leg loses, surviving doubles/trebles can still pay; fourfold is dead.
EV & Correlation
- All legs must be +EV: System bets multiply the bookmaker’s margin if legs are neutral/negative EV.
- Correlation drag: Legs from similar markets/teams/leagues increase joint failure risk. Keep systems diversified.
- Edge dilution: Extra unit cost means you need robust edges or higher odds to justify the system.
When to Use System Bets
- You have several small edges (e.g., 3–5%) and want protection if one leg fails.
- Liquidity is good; prices won’t collapse before you place all legs.
- You’re tracking performance by system type and controlling correlation.