Roulette is a casino game that involves spinning a ball on a wheel to determine the outcome of a bet. Players place their chips on a betting mat before the ball is spun. The game is played on both land-based and online casinos with a variety of automated betting options. Players can also make side bets that can earn them payouts of up to 25x their stake.
A standard roulette table can seat up to seven players, although some casinos feature dual tables to accommodate two groups of players simultaneously. The table is covered with a grid that outlines the numbers found on the wheel, along with other betting options.
The earliest known version of the game was invented by 17th century French mathematician Blaise Pascal, who is believed to have derived it from the older games hoc a and portique. Its current layout and wheel structure was developed in the early 18th Century.
Today, roulette is popular in many European countries and is also available for play in American gaming establishments. The American version differs from its European counterpart primarily in the addition of a 00 section on the wheel. The extra segment reduces the house edge slightly, but it does not significantly improve a player’s chances of winning.
There are many different types of roulette, and the rules vary between regions. For example, the game in France uses a single zero pocket on the wheel and has a different board and rules from that of American roulette. This variation includes a rule called la partage, which is translated as “sharing” in English. It allows players to get back half their stake on even money bets if the ball lands on zero. In addition to la partage, some French roulette games also include a rule known as en prison.
The game’s popularity has given rise to many systems designed to improve a player’s odds of winning. A quick search on Google will return millions of roulette strategies, some simple and some complex. Some of these systems promise to increase a player’s odds by placing bets at certain times or by choosing specific numbers. However, according to the American mathematician Patrick Billingsley, no betting system can convert a subfair game into one that yields a profit.