What is 21+3 Blackjack?

21+3 Blackjack is a thrilling blackjack variant that combines the excitement of classic blackjack with the strategic elements of poker. By introducing a side bet based on poker hands formed by the player's first two cards and the dealer's upcard, this variant adds a layer of suspense and potential for big payouts. In this article, we’ll explore the origins, rules, and strategies of 21+3 Blackjack, and see how it stacks up against other blackjack variants.

Origins and Background of 21+3 Blackjack

The 21+3 side bet was introduced to bring together two of the most popular casino games—blackjack and poker. First appearing in land-based casinos, it quickly gained traction for its simplicity and generous payouts. Today, 21+3 Blackjack can be found in both physical and online casinos, attracting players who enjoy the added thrill of poker-style combinations.

Game Rules Principles and Unique Features

21+3 Blackjack follows the standard rules of blackjack for the main game while introducing a side bet that hinges on forming poker hands. The goal remains to get a hand value as close to 21 as possible without exceeding it.

Key Rules Summary

Main Objective: The blackjack game itself is unchanged. Players aim to beat the dealer by having a higher hand value without exceeding 21.
21+3 Side Bet: The side bet is placed before cards are dealt. It pays out based on poker combinations formed using:
- The player's first two cards.
- The dealer's upcard.

Poker Combinations and Typical Payouts

Combination	Description	Payout
Flush	Three cards of the same suit	5:1
Straight	Three cards in sequential order	10:1
Three of a Kind	Three cards of the same rank	30:1
Straight Flush	Three sequential cards of the same suit	40:1
Suited Trips	Three identical cards in rank and suit	100:1

Player Actions and Strategic Decisions

In 21+3 Blackjack, players have the standard options for blackjack gameplay alongside the optional side bet:

Hit: Request another card to improve your hand.
Stand: Keep your current hand and end your turn.
Double Down: Double your bet and receive one additional card.
Split: Separate a pair into two hands, each played individually.

When playing the side bet:

Focus on the potential poker combinations rather than the blackjack value of your hand.
Manage your bankroll carefully, as side bets carry a higher house edge.

Probabilities of Winning the 21+3 Side Bet

The probabilities for hitting various poker hands in the 21+3 side bet depend on the number of decks used. Here’s an overview for a standard 6-deck game:

Combination	Probability	Impact
Flush	~3.7%	Fairly common, adds regular excitement.
Straight	~3.3%	Moderate occurrence, decent payout.
Three of a Kind	~0.5%	Rare but rewarding when hit.
Straight Flush	~0.02%	Extremely rare, highly rewarding.
Suited Trips	~0.01%	Jackpot payout, seldom achieved.

Comparison with Other Blackjack Variants

Here’s how 21+3 Blackjack compares to other popular variants:

Pontoon: Focuses on main-game strategy with unique rules like the Five Card Trick and hidden dealer cards, while 21+3 Blackjack adds excitement through poker-style side bets.
Perfect Pairs Blackjack: Both feature side bets, but Perfect Pairs is about matching pairs, whereas 21+3 offers more variety and frequent payouts with poker combinations.
Atlantic City Blackjack: Known for its player-friendly rules like late surrender and multiple splits, Atlantic City Blackjack emphasizes strategy, while 21+3 enhances traditional gameplay with an engaging side bet.

Why Play 21+3 Blackjack?

21+3 Blackjack is perfect for players who enjoy a blend of luck and strategy. The side bet offers high payouts and keeps the game exciting, even when the main blackjack hands aren’t in your favor. Whether you’re a seasoned player or a newcomer, the combination of blackjack and poker elements in 21+3 makes it a must-try casino game.