Head-to-head blackjack strategy
Updated 17 October 2026
Casino strategy assumes a dealer who must hit to 17. Tahúr has no dealer: it’s you against a rival who thinks, bluffs and can raise. Most of the old advice still holds, but three rules change it: both busting is a draw, standing is final, and the stakes can double.
Bust odds for every total
The chance that one more card takes you over 21, from a full deck with aces counting as 1. A soft hand (an ace still counting 11) can’t bust on one card, so these are for hard totals.
| Your total | Bust chance | Rule of thumb |
|---|---|---|
| 12 | 31% | Usually worth a card |
| 13 | 38% | Usually worth a card |
| 14 | 46% | Usually worth a card |
| 15 | 54% | Only if their board beats you |
| 16 | 62% | Only if their board beats you |
| 17 | 69% | Only if their board beats you |
| 18 | 77% | Stand unless you must catch up |
| 19 | 85% | Stand unless you must catch up |
| 20 | 92% | Stand unless you must catch up |
| 21 | 100% | Always stand: nothing beats it |
Below 12 you can’t bust at all, so always take a card. Four ranks out of thirteen are worth 10, which is why 12 already busts 31% of the time.
Busting isn’t always losing
Against a dealer, you lose the moment you bust, even if the dealer busts after you. Head to head, if you both bust, the set is a draw. So when your rival’s face-up cards already look heavy, a risky hit costs you less than the table above suggests: you only lose if they stay under. And a draw wipes both players’ streaks, which can be exactly what you need when they’re two away from ending the match.
Who acts last has the edge
You take turns, and the player who starts swaps every set. Standing is final: once you stand, your rival plays on alone and knows you’ve stopped. Acting last is a real advantage, because you see whether they stood before you decide. When you start, lean a little safer; when you act last, you can take exactly the risk the board demands.
Guess their hidden card
Everyone has one card face down. With nothing else to go on, the most likely value is 10: sixteen of the 52 cards are tens or face cards (31%), against 8% for any other single rank. Add 10 to what they show, then adjust for what you’ve learned: their tells, what they did last time with this board, and what’s already left the shoe.
Count the shoe
Each match deals from one shoe that’s only reshuffled when fewer than 15 cards are left, so every card you see changes the odds. When the big cards (10 to ace) are mostly gone the shoe runs cold: hit more freely. When they’re still there it runs hot: totals of 14 and up get dangerous. Tahúr shows you whether the shoe is hot or cold, but counting tens yourself is sharper.
In online duels and against kingpins, both players’ decks share the shoe and their backs differ, so you can see whose deck the top card comes from. That matters when one of you has marked cards: a mark only works for whoever made it.
Raising and folding: the one-in-four rule
A raise doubles the stake, up to ×4. Your rival must call and play for the doubled stake, or fold and pay the stake as it was before the raise. If a set is worth 1, folding costs you 1 for sure, while calling wins or loses 2. So calling beats folding whenever you’ll win the set more than one time in four (ignoring draws).
| Your chance to win the set | Average result if you call | If you fold | Best move |
|---|---|---|---|
| 15% | −1.4 | −1.0 | Fold |
| 25% | −1.0 | −1.0 | Either: it breaks even |
| 35% | −0.6 | −1.0 | Call |
| 50% | 0.0 | −1.0 | Call |
| 65% | +0.6 | −1.0 | Call |
That makes folding rarer than most players think: call with anything decent, and save folds for hands that are nearly dead. Turn it around when you raise: a raise is strongest when your rival is likely beaten but not sure enough to fold, and a raised set counts its whole stake toward the 5 set wins (but only once toward a streak). After a call, only the player who called can raise again.
Spend your Nerve
Powerups run on Nerve. You start a match with 1, gain 1 every set and 1 more for every set you lose, and you can hold at most 6. Nerve over the cap is wasted, so spend it before you hit 6. Losing a set refills you faster, which is why a comeback often starts right after a bad set. Every powerup and what it costs is on the powerups page.
Play the match, not the hand
- A match is first to 5 sets or 3 in a row, and against kingpins first to 10 or 5 in a row. When your rival is one away from a streak win, a safe draw can be worth more than a risky win.
- Every rival has tells. Your notebook records them, and after a few showdowns you’ll know what each habit means.
- Kingpins change their house rules mid-match and tell you when they do. Reread the rule card before your next decision.
New to the game? Start with how to play, or practise against Vic in Vic’s School: Learn to play is on the main menu.