La partage
French rule: when zero hits, half of an even-money stake is returned. Halves the house edge on those bets to 1.35%.
In context
$10 on redbetRedEven-money bet on the 18 red numbers. French: rouge.Read full →, zerowheelZeroThe single green pocket that no even-money, dozen or column bet covers; the source of the house edge. Also: single zero, 0.Read full → hits, $5 comes back. Nothing else changes.
Partage means “sharing”: the loss is shared between player and house. It is the only common rule that changes a roulette expected valuemathExpected valueThe average result per bet over the long run. −1/37 of the stake for every standard European bet.Read full → in the player’s favor.