The chances of getting winning combinations. 40,000:1 is a chance of getting a Royal Flush. Only one of 10,000 combinations can be a Straight Flush. The chance of getting Four of a Kind is 423:1. The chance of getting Full House is 86:1. Only one of 93 combinations can be a Flush. The chance of getting Straight is 85:1. The chance of getting Three of a Kind is 13:1. The chance of getting Two Pairs is 8:1. 5:1 is a chance of getting a High Pair. Computer Chinese Poker Full House.