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 allows you to hope to win more than the payouts of classic blackjack and keeps the game exciting, even when the main hands are not 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.