make a bet; this indicates that they do not wish to open, but do wish to keep their cards and retain the right to call or raise later in the same round if an opponent opens. In games played with blinds, players may not check on the opening round because the blinds are live bets and must be called or raised to remain in the hand. A player who has posted the big blind has the right to raise on the first round, called the option, if no other player has raised; if they decline to raise they are said to check their option. If all players check, the betting round is over with no additional money placed in the pot (often called a free round or free card). A common way to signify checking is to tap the table, either with a fist, knuckles, an open hand or the index finger(s). Open, bet, raise If in any betting round it is a player's turn to act and the action is unopened, then the player can open action in a betting round by making a bet—the act of making the first voluntary bet in a betting round is called opening the round. On the first betting round, it is also called opening the pot, though in variants where blind bets are common, the blind bets "open" the first betting round and other players call and/or raise the "big blind" bet. Some poker variations have special rules about opening a round that may not apply to other bets. For example, a game may have a betting structure that specifies different allowable amounts for opening than for other bets, or may require a player to hold certain cards (such as "Jacks or better") to open. Normally, a player makes a bet by placing the chips they wish to wager into the pot. Under normal circumstances, all other players still in the pot must either call the full amount of the bet or raise if they wish to remain in, the only exceptions being when a player does not have sufficient stake remaining to call the full amount of the bet (in which case they may either call with their remaining stake to go "all-in" or fold) or when the player is already all-in. To raise is to increase the size of an existing bet in the same betting round. A player making