Before a pool ticket: twelve questions with answers, or no ticket

§1The pool itself

• Which pool is this, exactly? A win pool, a place pool, an exotic pool and a multi-leg pool behave differently, pay on different conditions and are charged at different rates.
• What is the take on this pool? It is a proportional cut of the whole pool, and it is the one number in the dividend that the operator, rather than the crowd, decides.
• What is the declared dividend unit? Dividends declared per one unit and per two units differ by a factor of two, and figures compared across bases are meaningless.
• What is the minimum stake and the increment? They determine whether a small combination ticket is possible at all, and how rounding will treat it.

§2The rules that decide, rather than the arithmetic

• Is there a guarantee, and what does it cover? A floor under the gross pool, a floor under the dividend and a minimum payout are three different promises.
• If money is carried over, is the take charged on it again? On the illustrative numbers on the guarantees page the two conventions differ by more than eleven thousand units.
• How are ties treated? Splitting a pool between several winning tickets and paying it to one of them are different outcomes, and which applies is a rule.
• What happens to a ticket if a named runner does not take part? Substitution, partial refund and voiding the whole ticket are all used, and on a multi-leg ticket the answer can decide the ticket.
• Are there consolation payments? A partial payout changes what a losing ticket is worth, which changes what holding one costs.

§3Estimating the thing that cannot be known

The final dividend cannot be known, but an honest range can be bounded, and the exercise is worth doing before staking rather than after. Three scenario values are enough:

• The pool as it stands now. Take the current ledger and compute the dividend with no further money arriving at all. This is the optimistic end for a selection nobody else is backing, and it is almost never what is paid.
• The pool with a plausible amount of further money, distributed as recent comparable pools were. This is the estimate worth having, and it needs a source for the distribution, not a guess.
• The pool with heavy late money on your selection. This is the pessimistic end and it is the one that matters: it is the version of the bet that arrives when the crowd agrees with you.

If the bet only works in the first scenario, the bet does not work. That statement is not advice about what to stake; it is a statement about which of the three numbers is the one being relied on.

§4Your own size, as part of the price

• What share of the money on my selection would my own stake be? If the answer is a large one, your own ticket is part of the price your own ticket receives.
• What share of the whole pool would my stake be? On a thin pool this can be enough to move the dividend by a large fraction, as the worked examples show.
• On a combination ticket, what does one combination cost, and how many are there? Cost grows linearly with combinations while the winning element stays single.

§5The stopping rule

Every question on this page has the same function: to establish whether the ticket is understood. Where the take is unknown, where the pool type is unclear, where the carryover convention cannot be found, or where the effect of one's own stake is unexamined, the position is not a judged bet. It is a stake placed into a mechanism that has not been read.

That is the last honest thing this site can say on the subject, and it is why the checklist is the last page of substance before the questions: a pool is a simple mechanism with a short list of things worth knowing, and all of them are knowable before the money leaves.