Betting glossary
High-value terms with worked examples and links into the matching calculator or guide. Built to rival the old encyclopaedias — shorter, and tied to live maths.
Rule 4
Tattersalls deduction from winnings when a horse is withdrawn after you took an early price.
Definition →Each-way
Two equal bets: one to win, one to place at a fraction of the win odds.
Definition →Lucky 15
15 bets on 4 selections: 4 singles, 6 doubles, 4 trebles and 1 fourfold.
Definition →SNR (stake not returned)
Free-bet wins pay profit only — the free-bet stake itself is not paid back.
Definition →Dead heat
When runners tie, stake is shared across the tied positions, then full odds are paid on the reduced stake.
Definition →Accumulator (acca)
One bet that multiplies the odds of every leg — all must win (or void) to pay.
Definition →Non-runner (NR)
A selection that does not take part — singles refunded; multiples usually drop a fold at odds 1.0.
Definition →Overround (margin)
The sum of implied probabilities in a market above 100% — the bookmaker's built-in edge.
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