Some home
poker games and some casinos play the
double ace flush rule, in which a
/Wild card in a
/Flush always plays as an ace, even if one is already present. In such a game, the hand
A-Wild-9-5-2 (of one suit) would play as if it were
A-A-9-5-2, defeating
A-K-Q-10-8, whereas by the standard rules it would play as
A-K-9-5-2 and therefore lose (the opposing hand's
Q outranks the former's
9). This rule is rare, and is an exception to standard practice, so it should be announced clearly if you intend to use it.