Poker probability The "nCr" function on most scientific calculators can be used to calculate hand frequencies; entering with and , for example, yields formula_2 as above. The royal flush is a case of the straight flush. It can be formed 4 ways (one for each suit), giving it a probability of 0.000154% and odds of 649,739 : 1. When ace-low straights and ace-low straight flushes are not counted, the probabilities of each are reduced: straights and straight flushes each become 9/10 as common as they otherwise would be. The 4 missed straight flushes become flushes and the 1,020 missed straights become no
Protection (poker) Protection (poker) Protection in poker is a bet made with a strong but vulnerable hand, such as top pair when straight or flush draws are possible. The bet forces opponents with draws to either call with insufficient pot odds, or to fold, both of which are profitable for the betting player. By contrast, if he failed to protect his hand, another player could draw out on him at no cost, meaning he gets no value from his made hand. A protection play differs from a bluff in that the bluff can win "only" when the opponent folds, while protection bet