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  2. Mathematics of bookmaking - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_bookmaking

    Fractional odds are written a − b (a/b or a to b), meaning a winning bettor will receive their money back plus a units for every b units they bet. Decimal odds are a single value, greater than 1, representing the amount to be paid out for each unit bet. For example, a bet of £40 at 6 − 4 (fractional odds) will pay out £40 + £60 = £100.

  3. Spread betting - Wikipedia

    en.wikipedia.org/wiki/Spread_betting

    Spread betting is any of various types of wagering on the outcome of an event where the pay-off is based on the accuracy of the wager, rather than a simple "win or lose" outcome, such as fixed-odds (or money-line) betting or parimutuel betting. A point spread is a range of outcomes and the bet is whether the outcome will be above or below the ...

  4. Over–under - Wikipedia

    en.wikipedia.org/wiki/Over–under

    A variant of over-under betting, known as Under Over, [5] is a dice game played at various festivals. The object of the game is to predict whether the dice will roll to a total of under 7, over 7, or at 7. The game is typically played with 2 dice. A player typically places a wager on one of three spaces. These spaces are:

  5. Gambling - Wikipedia

    en.wikipedia.org/wiki/Gambling

    Fixed-odds betting and Parimutuel betting frequently occur at many types of sporting events, and political elections. In addition many bookmakers offer fixed odds on a number of non-sports related outcomes, for example the direction and extent of movement of various financial indices , the winner of television competitions such as Big Brother ...

  6. Dutching - Wikipedia

    en.wikipedia.org/wiki/Dutching

    A Dutch or an arb is profitable if the sum of the reciprocals of the decimal odds of each selection is less than 1, and each bet is sized such that the payout in each outcome are the same. Additionally, the profitability of a Dutch/arb can be expressed as 1-R, where R is the sum of the reciprocals. [2]

  7. Each-way - Wikipedia

    en.wikipedia.org/wiki/Each-way

    For the place part of the bet to give a return, the selection must either win or finish in one of the predetermined places for the event, such as first place or second place. The odds paid on the place part of the bet are usually a fraction (commonly 1 ⁄ 2, 1 ⁄ 3, 1 ⁄ 4 or 1 ⁄ 5) of the win odds. The trade-off being that one has a ...

  8. Martingale (betting system) - Wikipedia

    en.wikipedia.org/wiki/Martingale_(betting_system)

    Even if the gambler can tolerate betting ~1,000 times their original bet, a streak of 10 losses in a row has an ~11% chance of occurring in a string of 200 plays. Such a loss streak would likely wipe out the bettor, as 10 consecutive losses using the martingale strategy means a loss of 1,023x the original bet.

  9. Card counting - Wikipedia

    en.wikipedia.org/wiki/Card_counting

    A bet ramp is a betting plan with a specific bet size tied to each true count value in such a way that the player wagers proportionally to the player's advantage to maximize bankroll growth. Taken to its conclusion, the Kelly criterion demands that a player not bet anything when the deck does not offer a positive expectation; "Wonging ...