A system is a type of bet that includes several multiple bets. In this case, the odds are equal to the product of all the odds for the events that are included in the express. But payments are made separately for each express.

The system can have different dimensions – 2 out of 3, 3 out of 4, and others. In this case, the second number is the total sum of outcomes for a particular system, the first number is the number of outcomes included in a particular express.

The amount of such a bet is divided into the total number of accumulators in equal parts, for example, the total bet size is $600, the 2 out of 4 system is used. In this case, 6 separate accumulators are used, each with $100 per bet. (you need to divide the total amount by the number of bets). The system will include the following events:

- Match W1 with a coefficient of 1.4 (Barcelona – Athletic);
- Match W1 with a coefficient of 1.5 (Real Madrid – Valencia);
- Match W1 with a coefficient of 2 (Juventus – Napoli);
- Match W1 with a coefficient of 1.5 (Manchester United – Swansea).

Based on this, accumulators will be calculated:

- Barcelona – Athletic Bilbao W1 with odds of 1.4 + Real Madrid – Valencia W1 with odds of 1.5: the total odds will be 2.1;
- Barcelona – Athletic Bilbao W1 odds 1.4 and Juventus – Napoli W1 for 2: the total odds will be 2.8;
- Barcelona – Athletic Bilbao W1 odds 1.4 and Manchester United – Swansea W1 for 1.5 = odds 2.1;
- Real Madrid – Valencia W1 for 1.5 and Juventus – Napoli W1 for 2: the total odds will be 3;
- Real Madrid – Valencia W1 for 1.5 and Manchester United – Swansea W1 for 1.5: the total odds will be 2.25;
- Juventus vs Napoli W1 for 2 and Manchester United vs Swansea W1 for 1.5: the total odds will be 3.

Such a system makes it quite easy to calculate the total payout for all bets. In this example, if Barcelona wins, the player will receive $825, that is, the payouts for the 4, 5, 6 accumulators will work. If you bet on Manchester United and Juventus, then the amount of profit will be $300.