in the pot. Carol has the option of checking or raising; she makes a raise of $8. Ellen folds. Dianne calls the raise, ending betting on this round. Mississippi straddle: Alice posts $1, Dianne posts $2, Ellen, on the button, posts a Mississippi straddle of $4. Because of the straddle, Alice, the small blind, is now first to act; she folds. Dianne calls the straddle by putting an additional $2 in the pot. Carol folds. Joane calls the straddle. Ellen has the option of checking or raising; she checks, ending betting on this round. Sleeper: Alice posts $1, Dianne posts $2, and Joane posts a sleeper blind of $4. The hole cards are dealt. Carol acts first as last action remains with the big blind, but the bet to her is $4. She calls. There is no additional bet to Joane and she has no option, so play passes over her to Ellen. She calls the $4 as well. Alice folds. Dianne, in the big blind, no longer has the option either; she must either call $2, raise, or fold. She raises by $4 (total bet is now $8). Carol re-raises to $12. The bet is now $8 to Joane, who must now call, raise or fold; she calls, as do Ellen and Dianne, ending the betting round. Limits Betting limits apply to the amount a player may open or raise, and come in four common forms: no limit, pot limit (the two collectively called big bet poker), fixed limit, and spread limit. All such games have a minimum bet as well as the stated maximums, and also commonly a betting unit, which is the smallest denomination in which bets can be made. For example, it is common for games with $20 and $40 betting limits to have a minimum betting unit of $5, so that all bets must be in multiples of $5, to simplify game play. It is also common for some games to have a bring-in that is less than the minimum for other bets. In this case, players may either call the bring-in, or raise to the full amount of a normal bet, called completing the bet. Fixed limit In a game played with a fixed-limit betting structure, a player chooses only whether to bet or not—the amount is fixed by rule in most situations. To enable the possibility of bluffing and protection, the fixed amount