Four of a kind, also known as quads, is a poker hand such as 9♣ 9♠ 9♦ 9♥ J♥, that contains all four cards of one rank and any other (unmatched) card. Quads with higher-ranking cards defeat lower-ranking ones. In community-card games (such as Texas Hold 'em) or games with wildcards or multiple decks it is possible for two or more players to obtain the same quad; in this instance, the unmatched card acts as a kicker, so 7♣ 7♠ 7♦ 7♥ J♥ defeats 7♣ 7♠ 7♦ 7♥ 10♣. If two hands have the same kicker, they tie and the pot is split.
In five-card poker, there are 624 possible hands including four of a kind, the probability of being dealt one is approx 0.024%.
In seven-card poker, the frequency of four of a kind is 224,848, the probability of being dealt one is approximately 0.168%.
Note: This cache was placed in Jonathan Dickinson State Park as part of Cacheapalooza 7, with the permission of Martin Morse, Park Service Specialist. If you park anywhere in JDSP, make sure all your tires are off the road and you are not blocking any gates.