That player would then incur a penalty and be made to sit out a hand or more (at the tournament director's discretion). The player checks back and shows down the ace-high flush - an unbeatable hand on that board. To give an example, a player holds and watches as an opponent checks the river with the board showing. The rule is enforced in tournaments at the World Series of Poker and elsewhere (though not everywhere). However even those who play a lot might not have personally faced this particular situation and so might not be aware of the rule requiring you to bet when holding the best possible hand when last to act on the final betting round.

Those who watch a lot of televised tournament poker might be aware of this rule, as will most experienced tournament players. Do You Have to Bet the Nuts on the River? Here are five poker rules from a variety of different poker games that not everyone may know about, even though in some cases they should. The rules of poker cover a wide range of unusual situations, including some that even experienced poker players may not have encountered or paid much attention to before.

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