Bet types: singles, accumulators, handicaps and systems explained

Single bets: the format everything else is built on

A single is one stake on one outcome. If it wins, you receive the stake multiplied by the decimal odds; if it loses, you lose the stake. For example, €10 on a selection at 2.20 returns €22. Every other bet type is a combination of singles in some form, which is why understanding the single — and the single/parlay difference that follows — makes the rest of this page easy. Singles also keep each decision separate: one wrong opinion costs one stake, not a whole ticket.

The bet types described here are general. How a specific bookmaker, Optibet included, names, offers and settles them is set out in its own betting rules — and those rules are part of the contract with the company named in its terms, so they are worth reading before your first bet.

Accumulators: how the odds multiply — and the margin too

An accumulator, also called a parlay or multi, joins several selections into one bet. The odds multiply and every selection must win. A hypothetical three-leg accumulator at 1.80, 2.00 and 1.50 has combined odds of 5.40, so a €5 stake would return €27. That multiplication is the attraction. The catch is that the bookmaker's margin multiplies as well: if each price carries a margin of about 5%, the three-leg ticket carries roughly 15–16%. The more legs you add, the more the maths works against you, regardless of how confident each pick feels.

Two rules are worth checking in advance. First, what happens to a void leg, for instance a postponed match — many bookmakers treat it as if it had odds of 1.00 and settle the rest, but rules differ. Second, whether related selections from the same event can be combined at all; some operators restrict or reprice such combinations.

Handicap and over/under markets

A handicap gives one side a virtual head start or deficit to balance a mismatch. In a European handicap, the draw on the handicapped score is a separate outcome; in an Asian handicap there is no draw, and whole-number lines refund the stake if the adjusted result is level. Quarter lines such as -0.75 split your stake across two neighbouring lines, so part can win while part is refunded. The handicap is useful when the favourite's plain odds are too low to be interesting, but it raises the bar they have to clear.

The over/under market ignores the winner and asks whether a number — goals, points, games, corners — ends above or below a line. Half-point lines like 2.5 cannot be tied; whole-number lines may refund the stake on an exact hit. Totals reward an understanding of how two teams or players combine, rather than who is better.

Safety-net bets: double chance and draw no bet

In sports with draws, two markets reduce risk at the cost of price. Double chance covers two of the three results — home or draw, away or draw, home or away. Draw no bet refunds your stake if the match is drawn and settles normally otherwise. Both are reasonable tools when you have a clear view on one side but respect the draw. Neither is free: the lower odds already include the protection, plus the bookmaker's margin.

System bets: covering combinations

A system bet places several accumulators at once, so one wrong selection does not automatically lose everything. A “2 from 3” system on three selections is three doubles. A Trixie is the same three doubles plus a treble — four bets. A Yankee on four selections is eleven bets: six doubles, four trebles and one fourfold. The stake you enter applies to each line, so a €1 Yankee costs €11, not €1. Systems soften variance, but they also multiply the number of margins you pay, and the total stake rises quickly. Check the bet slip's total before confirming.

Choosing a format that suits you

There is no best bet type, only one that fits your budget and temperament. If you value control and clear records, singles are hard to beat. If you enjoy the occasional long shot, keep accumulators short and the stakes small, treating them as entertainment rather than a plan. Whatever the format, decide the stake before you open the bet slip, and set a deposit limit with the operator. Our sport guides show how these markets behave in practice: football, basketball, tennis and ice hockey. For odds and margins, see the betting overview; if staking starts to feel out of control, the responsible gambling page explains the tools available.