Fair game
A game in which neither side has an edge: every bet has an expected value of zero.
In context
Roulette without zeroswheelZeroThe single green pocket that no even-money, dozen or column bet covers; the source of the house edge. Also: single zero, 0.Read full → would be fair, because a bet on n numbers pays (36 − n)/n to 1. Each zero added takes the game further from fair.
Mathematicians mean “fair” only in this sense; it says nothing about honesty. A fair game can still empty a bankrollmoneyBankrollThe total amount set aside for play. Bankroll management is deciding how much of it to risk per bet and per session.Read full →, because of variancemathVarianceA measure of how widely results spread around the expected value. High for straight up, low for even-money bets.Read full →.