Best Flush is one of the Poker variations. There can be up to ten players in the game. Each player receives one card face up and one face down. There is a betting round after the deal. Then each player is dealt one more card. Cards are dealt and bets are made until each player has 5 cards. Players show their cards after the last betting round. The player, who has the best hand is the winner. Only Flushes or Straight Flushes may win. If no one has a Straight Flush, best Flush wins. If no one has a Flush, best Four-card Flush, Three card flush, or Two card flush wins.] Online Poker Flush.