Round Robin Glossary: 40 Terms Every Bettor Should Know

Horse racing and betting have their own vocabulary — dense, occasionally archaic, and rarely explained by the platforms that use it. This glossary collects the forty terms most relevant to round robin betting and defines each one in plain language. It is a reference, not a read-through: bookmark it, search it when a term trips you up, and speak the language of the betting ring with confidence.

Terms A–L

Accumulator. A single bet combining multiple selections where all must win. A three-selection accumulator is a treble. Sometimes called an “acca.”

Any-to-come (ATC). A conditional bet instruction meaning: if there is profit from this bet, use it to fund a subsequent bet. The historical basis for SSA pairs.

Best odds guaranteed (BOG). A bookmaker promotion that pays at whichever is higher — the price you took or the starting price. Applies to each selection individually within a round robin.

Bet slip. The interface — digital or paper — on which you record your selections, bet type, and stake before submitting the wager.

Bookmaker margin. The difference between the true probability of an outcome and the implied probability in the odds offered. Also called the overround, vig, or juice.

Conditional bet. A wager that only activates if a prior condition is met — typically, a preceding selection winning. SSA pairs are conditional bets.

Course and distance (CD). A race card notation indicating a horse has previously won at this specific racecourse and at this distance. A strong positive signal for selection.

Dead heat. Two or more horses finishing inseparable for the same placing. In a round robin, a dead-heat winner pays at half the odds on the affected leg.

Decimal odds. Odds format showing the total return per unit staked, including the stake. Fractional 3/1 = decimal 4.00. Used in all round robin return calculations.

Double. A two-selection bet where both must win. A round robin contains three doubles: AB, AC, and BC.

Draw. The starting stall position assigned to a horse in a Flat race. At some courses, certain draw positions carry a statistical advantage.

Each-way (E/W). A bet consisting of two parts: a win bet and a place bet, each at the stated stake. An each-way round robin contains twenty bets and costs double the win-only version.

Expected value (EV). The long-run average return of a bet. A negative EV means the bet loses money on average over many repetitions. Round robin EV is almost always negative.

Form. A horse’s record of recent results, shown as a string of finishing positions on the race card. Recent form is the primary tool for selection.

Fractional odds. The traditional UK odds format expressing profit relative to stake. At 5/2, a winning £1 bet returns £2.50 profit plus the £1 stake.

Full cover bet. Any bet that includes every possible combination of doubles, trebles, and higher accumulators from a set of selections. The round robin is a full cover bet with conditional singles.

Going. The condition of the racing surface: Firm, Good to Firm, Good, Good to Soft, Soft, or Heavy on turf; Standard or variants on all-weather.

Gross return. The total amount paid back by the bookmaker, including the original stake. Net profit = gross return minus total outlay.

Implied probability. The probability of an outcome as suggested by the odds: 1 ÷ decimal odds. Includes the bookmaker’s margin.

Jockey. The rider. In Britain, there are around 500 licensed Flat and Jump jockeys. The riding fee is £162.79 per Flat race and £227.92 per Jump race, according to Chepstow Racecourse statistics, though top jockeys earn the majority of their income from prize money percentages and retainer fees. Britain’s 61 racecourses provide the stage.

Leg. A single selection within a multi-bet structure. A round robin has three legs.

Terms M–Z

Multiples. A general term for any bet combining two or more selections. Doubles, trebles, accumulators, and round robins are all multiples.

Non-runner. A horse withdrawn from a race before the start. In a round robin, all components involving that horse are voided (early withdrawal) or subject to Rule 4 (late withdrawal).

Overround. The total implied probability of all outcomes in a market minus 100 percent. Represents the bookmaker’s theoretical margin on that race.

Patent. A seven-bet full cover on three selections: three singles, three doubles, one treble. Returns something from one winner. Costs £7 at £1 unit.

Place terms. The fraction of the win odds paid on the place portion of an each-way bet. Typically one-quarter for most races, one-fifth for large-field handicaps.

Round robin. A ten-bet full cover on three selections: three doubles, one treble, six SSA singles. The only full cover bet that includes conditional singles.

Rule 4. A Tattersalls’ Rule allowing deductions from winnings when a horse is withdrawn after the market has opened. The deduction scale ranges from 5p to 90p in the pound, based on the non-runner’s odds.

Self-service betting terminal (SSBT). A touchscreen machine in a betting shop that allows punters to browse races, place bets, and collect winnings without counter interaction. SSBT revenue reached £153 million in late 2024. Britain has around 5,825 licensed betting shops, per the Gambling Commission.

Single. A bet on one selection. The simplest bet type and the lowest-margin option.

Single stakes about (SSA). A conditional bet pairing two selections in both directions. If the first wins, a single at one unit stake is placed on the second. Six SSA pairs form the conditional engine of a round robin.

Stake. The amount of money wagered. In a round robin, “unit stake” means the amount per component bet; total stake = unit stake × 10.

Starting price (SP). The official odds at the moment the race begins, as determined by on-course bookmakers. Used for settlement when no fixed price was taken.

Treble. A three-selection accumulator. All three must win. A round robin contains one treble as its highest-ceiling component.

Trixie. A four-bet full cover on three selections: three doubles and one treble. No singles. Returns nothing with one winner. Costs £4 at £1 unit.

Unit stake. The amount wagered on each individual component of a combination bet. A £1 unit stake on a round robin produces a £10 total outlay.

Up-and-down. Colloquial term for an SSA pair. The name describes the flow of money: “up” from a winning first leg, “down” onto the conditional second leg.

Variance. The statistical spread of possible outcomes around the expected average. Round robins have lower variance than accumulators because partial returns compress the range of results.

Void bet. A bet that is cancelled and the stake returned, typically because a selection is a non-runner or a race is abandoned.

Yankee. An eleven-bet full cover on four selections: six doubles, four trebles, one four-fold. No singles. The next step up from a Trixie in terms of selection count.

Yield. A bettor’s profit or loss expressed as a percentage of total turnover. A positive yield means the bettor is beating the bookmaker over the sample period. Tracking yield on round robins separately from singles helps assess whether the bet type is working for your approach.

Summary

Forty terms, from accumulator to Yankee. This glossary covers the vocabulary you need to understand round robin betting, read a race card, interpret a bet slip, and follow the maths behind the returns. Bookmark it, reference it, and let the language stop being a barrier to the bet.