How to play
Take the idea of blackjack, throw away the deck and use six-sided dice. That’s Dice Twenty-One. You build a total one die at a time, try to finish closer to 21 than the dealer, and lose immediately if you go past it. There are no face cards, no soft hands, no splits and no doubling, so a hand takes a few seconds.
- Choose a chip (10, 50, 100 or 500) and tap the bet spot. Stakes run from 10 to 500 credits in steps of 10. Clear removes the bet; Rebet restores the last one.
- Press Roll two dice. Your opening total appears next to “You”.
- Now press Roll to add a single die, as often as you like, or Stand to stop. Passing 21 ends the hand on the spot. Hitting exactly 21 stands for you automatically.
- Once you stand, the dealer throws two dice and keeps adding one at a time until the total reaches 18 or more. The dealer has no choices.
Who wins and what it pays
| Final position | Result |
|---|---|
| You went over 21 | You lose, even if the dealer later busts |
| Dealer went over 21 | You win 1 to 1 |
| Your total beats the dealer’s | You win 1 to 1 |
| Your 21 beats the dealer | Paid 3 to 2 |
| Totals are equal | The dealer wins |
The 3-to-2 bonus applies to any 21, whether you got there with three dice or seven. A 21 that meets a dealer 21 is a tie, though, and ties go to the house.
How the dealer’s hand lands
Because each die is independent, the dealer’s final total can be worked out exactly:
| Dealer ends on | Chance |
|---|---|
| 18 | 28.6% |
| 19 | 23.7% |
| 20 | 19.1% |
| 21 | 14.3% |
| Over 21 | 14.3% |
Notice what this means. The dealer never stops below 18, and an 18 for you can at best tie with the dealer’s 18, which you lose. So any total from 2 to 18 behaves the same when you stand: you win only if the dealer busts, about one hand in seven.
Strategy
The best play falls straight out of that table: roll on 18 or less, stand on 19 or 20. You never have to decide on 21.
Some of those rolls feel brave. On 18, half the faces (4, 5, 6) bust you. Rolling is still right, because standing on 18 loses about 71% of your bet on average, while rolling loses only about 28%. The 1, 2 and 3 that keep you alive turn into 19, 20 or 21, which are genuinely strong.
At the other end, the opening total of two dice is at most 12, and no single die can take 15 or less past 21. Rolling from those totals is free of risk. The first real decision only comes at 16, and the answer is still roll.
Standing on 19 is close but correct: it wins against an 18 or a bust, about 43% of the time, ties against 19 (a loss), and still comes out ahead of rolling. Standing on 20 is clearly better than anything else.
Played this way, the game returns 97.05% of your bets, a house edge just under 3%. Every deviation from the rule above lowers that number. In particular, standing on a low total and “letting the dealer bust” is the most expensive habit there is.
For the card version with doubles, splits and a shoe, try Blackjack. Seven and a Half is another push-your-luck total game with a lower target.
If you enjoy Dice Twenty-One, try Double Ball Roulette or Double Bonus Poker next.
