More Than One Result
A best-of-three series requires one side to win twice. It adds rounds and suspense without changing either side's overall chance of winning.
Best of three — first to two wins
Ready when you are
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Press Space to flip. The flip runs in your browser.
Best of three.
First to two wins.
Play a first-to-two series instead of a single toss. It uses more flips; it does not make the series a more reliable or fairer decision method.
For a low-stakes choice, you may prefer a short series to one toss. A best-of-three requires one side to win twice; it uses more flips but does not make the series fairer or more reliable.
The browser runs the flips, shows each result in the series, and stops when one side reaches two wins. The displayed series outcome is what the local mode statistics count.
Understanding the Best-of-Three Toss
A series ends once one side wins twice.
Automatic Series Rules
The tool displays flips in sequence and stops as soon as one side reaches two wins. It counts the completed series by its winner, rather than adding each flip to the single-toss statistics.
The Mathematics of a Best-of-Three Series
Assuming independent tosses with equal odds for both sides, each side has a 50% chance of winning the series. If a side loses the first toss, it must win the next two to take the series, which has a 25% chance under those assumptions.
When to Use Best-of-Three
A multi-toss series can be useful when the participants prefer several rounds, as long as the decision suits a random method. For example:
- Casual games: Choosing which team starts or selects first.
- Low-stakes choices: Comparing two options when either result is acceptable.
The tool runs the series in your browser. For official competition rules or consequential decisions, follow the applicable process instead.