Study on the Strategy of Playing Doudizhu Game Based on Multirole Modeling

Table 1

List of ways to play cards.

Suit pattern	Description	Counter
Pass	Choose not to play card this turn. It is also called as a trivial pattern.	1
Rocket	Same as the joker bomb, both jokers (red and black) are the highest bombs.	1
Bomb	Four cards with same points (e.g., AAAA).	13
Single	One single card (e.g., A).	15
Pair	Two cards with same points (e.g., AA).	13
Triplet	Three cards with same points (e.g., AAA).	13
Single sequence	Five of more singles in sequence excluding 2 and jokers (e.g., ABCDE or ABCDE...).	36 (=8 + 7+6 + 5+4 + 3+2 + 1)
Double sequence	Three of more pairs in sequence excluding 2 and jokers (e.g., AABBCC or AABBCC...).	52 (=10 + 9+8 + 7+6 + 5+4 + 3)
Triplet sequence	Two of more triplets in sequence excluding 2 and jokers (e.g., AAABBB or AAABBBCCC...).	38 (=11 + 10+9 + 8)