Card games are known to have a long history. Poker itself was invented nearly five hundred years ago. Originally, poker rules were rather different if compared to the modern ones. The renovation of poker was started at the beginning of the nineteenth century. In the twentieth century there was introduced and confirmed a set of modern poker rules including the list of winning combinations (hands). Moreover, a number of poker variations have been invented which make the game more diverse.

In fact, there are three main gambling options given at players’ choice: 1) to play poker as a community table game; 2) to use video poker machines; 3) to take advantage from digital technologies that offer a great variety of virtual poker software. The statistical data demonstrate that the latter option enjoys the greatest popularity due to extended possibilities for each player. Computer users are offered downloadable poker programs which emulate the game and open betting opportunities. As a rule, digital poker has got connections with Internet gambling websites to let gamers sign in, receive a gambling account and start own cash betting rounds.

Online card gambling facilities are represented by so-called poker rooms (online poker communities). Here users are offered a range of poker-related resources, such as: experts’ practical advice which might be useful in choosing an appropriate online poker strategy, poker rules betting systems etc; and theoretical information as far as the basic regulations of poker variations are concerned (e.g. Omaha poker rules guide; or Pai Gow poker rules and hands).