Casinos

Complimentary meals, rooms and free play are calculated from a rating of your play. The rating rests on a figure called theoretical loss, and understanding it changes how comps look.

Deuces wild is a draw-poker machine game in which all four twos act as wild cards. That one rule changes which hands pay, which hands are common and how a paytable should be read.

Caribbean stud is a five-card poker game played against the house rather than other players. This entry covers the ante, the raise decision, the dealer's qualifying hand and the bonus paytable.

Sweepstakes casinos sit in a curious spot between free social games and real-money sites. On screen they resemble any casino lobby, full of reels and card tables, but underneath they are organised…

Number games invite a particular kind of thinking. Results arrive at set times, patterns seem to appear in old charts, and it is tempting to believe the next draw owes something to…