Numbers

Why Multi-Match Predictions Rarely Pay

Getting one result right is hard enough. Needing several at once shrinks the chance far faster than most people expect.

The multiplication

If you have an even chance of calling one match correctly, the chance of calling two is one in four, three is one in eight, and ten is roughly one in a thousand. Each extra match multiplies the difficulty.

Football makes it harder

A football match has three outcomes, not two, and draws are common. Even a strong favourite fails to win a meaningful share of the time. Combine several favourites and one upset is enough to sink the whole coupon.

The same logic in fixed-odds betting

A parlay, also called an accumulator, links several selections so that all must win. The potential return grows with each selection, and so does the chance of losing everything. An article in Traditional Chinese walks through the arithmetic with tournament examples: how accumulator odds multiply and the common mistakes (世足串關投注攻略).

What this means in practice

A large possible prize usually signals a small probability, not a good opportunity.
Small stakes on long shots are entertainment. Large stakes on long shots are a way to lose money quickly.
If you play the pools, play for the conversation on Monday morning.