21+3 blackjack rules: odds, how to play

Getting familiar with 21+3 blackjack

The growing competition in the online gambling market is forcing creators of online casino software to come up with more new ways to attract customers. One popular method is to develop original models by simply combining several time-tested gambling games.

In this review, we are going to discuss the popular game dubbed 21 + 3 Blackjack. It has already gained a large faithful audience online. The given game actually combines the principles of classic European blackjack and three-card poker. Let’s have a closer look at the final outcome of several gambling developers.

21+3 blackjack rules

Of course, any acquaintance with a new game always starts with its rules. The same is true for this review. We are going to illustrate 21+3 official blackjack rules.  

Well, we can define 21 + 3 Blackjack as an unusual kind of online blackjack. The game features certain elements of a three-card poker. The author of the game is Derek Webb, who once invented this type of poker.

For the game, six standard decks of fifty-two sheets each are used. There are no jokers here. All cards are shuffled before each deal.

Here you can make two bets. The main one is a regular blackjack bet. The player who made it seeks to defeat the dealer, gaining more points than he, without exceeding twenty-one.

At this bet, the game is played on the basis of the following rules:

• The dealer takes the card at sixteen and stops at any seventeen.

• The dealer initially takes for himself one card, which he puts open.

• Double’s allowed on any two cards.

• Split and re-split are allowed on the box.

• Double can be done after split.

• One split is dealt to split aces.

• There can be no blackjack on divided boxes.

• There is no surrender in 21 + 3 Blackjack.

• There is insurance against blackjack with an open ace at the dealer.

The usual winning box is paid with the odds 1: 1. For blackjack, it’s 3: 2, and for insurance, it amounts to 2: 1.

We should also mention a so-called “side bet.” Well, that’s an extra wager normally put outside the key betting area in the beginning of every round. Here, it’s placed on an extra field. The first two cards of the gambler and the dealer’s card opened from the deal are played on it. If there’s a paid combination in these three cards, the client will immediately receive a payment of the set amount.

Taken from poker, a side bet in 21+3 can bring you a win on the condition your first two cards as well as the dealer’s upcard are made up of any of the following combinations. As a matter of fact, the 21+3 area shows up to the right of the gambler’s betting area. It gets highlighted at the betting window. Since the payouts of the side bets in this game are fairly high, you’d better play them only you already play this game professionally.

These are key types of side bets in the game:


In this case, the cards share the same suit such as 8, 3, and 4 of Diamonds.

Suited Trips

3 cards from an identical triplet, such as three 4’s of Spades.

Three of a Kind

These cards share the same value, although have different suits. These may be three unmatching Jacks.


These cards demonstrate a numerical sequence, although coming from different suits. For example, these may be four of Clubs, five of Hearts, six of Spades.

Straight Flush

With an evident numerical sequence, they also share the same suit. For example, we can mention Hearts, 7, 8, 9.

The following combinations are considered to be winning:

• Flash – 5: 1

• Straight – 10: 1

• 3’s – 33: 1

• Straight flush – 35: 1

• 3’s of the same suit – 100: 1

You can play 21 + 3 Blackjack for only one box. In some online casinos, both bets are accepted in the range from one to a thousand credits.

Specified by the manufacturer the theoretical return of 21 + 3 Blackjack amounts to 99.7%.

Let’s illustrate a situation when the client makes both bets (they can be of different sizes). The dealer deals one card to himself and two cards to the player. If there is a paid combination of three-card poker in the three cards lying on the table, a prize is awarded on it.

Then the client decides what to do with his two cards, following the rules of blackjack. Based on the situation, he can take another card, split or double the bet. In general, everything is like in ordinary blackjack.

Bonus Games in 21 + 3 Blackjack

There are no bonus payments in the game 21 + 3 Blackjack.


A progressive jackpot is absent in this game.

User interface

Now it’s high time to get familiar with the user interface of this gambling game. We will show you all the basic elements of the control panel and explain their functions.  

• Deal – to deal cards

• Rebet and Deal – to repeat the bet and deal cards

• Rebet – to repeat the bet

• Double Bet – to make a double bet

• Clear – to remove bets

• Select Your Bet Size – to choose the chip value for betting

• Hit – draw a card

• Stand – stop card drawing

• Split – split cards into two hands

• Double Down – to make a double boxing bet

• Options – user settings

• Paid – a payout amount

• Bet – a bet size

• Game Rules – to view game rules

• Paytable – to view a paytable

In the parameters, you can enable or disable pop-up prompts. Here you can also find an offer to make insurance and accelerated deals. In addition to this, here you can specify the quality level of the graphics. If you are eager to find out more about this gambling game, feel free to take advantage of a detailed reference section.


In general, we can say that 21+3 Blackjack is a classic European blackjack, you might have already played. Here a side bet was added, playing according to the rules of three-card poker. By the way, you do not need to understand this poker because all the actions associated with it are performed automatically. You just need to make the right decisions in this version of blackjack.

Where can I play 21 + 3 Blackjack for free without registration or for money?

The game 21 + 3 Blackjack can be found in various online casinos. Except for playing for money, you may be offered a demo mode you can even try without registration. A demo mode will enable you to polish your skills before moving to real money bets. 

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