The rules are general poker rules.
When all the poker hand is established, you will get a basic score, and you will enter the double-up mode!
Double-up mode selects one from five cards,
If you issue a card with a number larger than the presented card, WIN!
・ As an exception, Ace (1) is stronger than King (13).
・ Joker is a wild card and is the strongest in double-up mode.
The score will increase with the basic score and the success of the double up.
Correspond to the ranking, lets aim for the highest score in the world!