The Royal Flush is the crown jewel of poker. Representing the highest possible straight flush (an Ace-high sequence A-K-Q-J-10 of identical suit), it cannot be defeated by any other card holding in standard poker.
Royal Flush in Spades
A♠
♠
A♠
K♠
♠
K♠
Q♠
♠
Q♠
J♠
♠
J♠
10♠
♠
10♠
Royal Flush in Hearts
A♥
♥
A♥
K♥
♥
K♥
Q♥
♥
Q♥
J♥
♥
J♥
10♥
♥
10♥
Mathematical Probability Breakdown
5-Card Deal (e.g. Draw Poker) 1 in 649,740 4 combinations out of 2,598,960
7-Card Deal (Texas Hold'em) 1 in 30,940 4,324 combinations out of 133,784,560
What It Loses To Nothing 100% Win Rate