The rules of Doubt are simple, but it requires the ability to read your opponent's playing cards.
Please give it a try!

■Doubt Rules
-Rule Overview
A player loses when they play all their cards, clear their hand, or when they reach 30 or more cards.
In Doubt, each user places their playing cards in the central area and can decide whether to doubt for a certain period of time.
If no players doubt for a certain period of time, the next player takes over.

-Rule Details
A total of 52 playing cards are used.
13 cards are randomly allocated to the user, COM1, COM2, and COM3.
Play begins with the user, and players play clockwise.
Up to four playing cards can be played in one play.
The number of the playing card to be placed in the central area is displayed.
You may or may not play the card corresponding to this number.
Play any playing card you like.
However, please note that if another player plays a playing card with a number other than the specified number and doubts, all of the playing cards in the center field will become the user's property.
This process is repeated in sequence, and the game ends when one player plays all of their cards and clears the board, or when they have more than 30 cards in their hand and lose.
Each player is awarded points depending on the result of the game.