Each-Way AtlasGlossary: each-way, odds and racing terms
Accumulator
An accumulator, or acca, is one bet on several events in which every selection must win, and the decimal odds of the selections are multiplied together. A £2 stake on four selections priced 2.0, 3.0, 1.5 and 4.0 gives combined odds of 36.0. Each-way versions are on each-way multiples.
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What an accumulator is
You make one bet and pick several selections. The bet pays only if all of them win, so a single loser ends it.
The reason people use it is the multiplication: each winner passes its whole return on to the next. The same feature is why it is harder to win than a single bet.
A double is the smallest accumulator, with two selections.
The short version: all selections must win, and their odds multiply.
Example: four selections
Convert each price to decimal first; see how to read odds. Then multiply along the row.
| Selection | Fractional | Decimal | Running product |
|---|---|---|---|
| Selection 1 | 1/1 | 2.0 | 2.0 |
| Selection 2 | 2/1 | 3.0 | 6.0 |
| Selection 3 | 1/2 | 1.5 | 9.0 |
| Selection 4 | 3/1 | 4.0 | 36.0 |
The return is £2 × 36.0 = £72.00, which is £70.00 profit. Remove any one winner and the return is nothing. These prices are invented for the sum and are not offers.
The short version: multiply the decimal prices, then multiply by the stake.
The each-way variant
An each-way accumulator is two accumulators: a win accumulator and a place accumulator. It costs twice the unit stake; see unit stake.
In the place accumulator every selection has to place, and each place part pays at that race's place fraction. A void selection is counted at 1.0; see void bet.
The cost and return sums for each-way multiples are on each-way multiples.
The short version: each way doubles the cost, and every selection must place for the place part to pay.
What we have and have not checked
The product rule is arithmetic that you can check on a calculator. The operators' own definitions are the part that needs a source.
| Fact to read | Where to read it | Status |
|---|---|---|
| The operator's definition of an accumulator | Operator betting rules, at least two, dated | Not verified |
| Each-way accumulator rules | Operator rules and the terms for the race | Not verified |
The short version: the example is our arithmetic; operator definitions are marked Not verified.
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