ACR Poker is launching a new hybrid tournament format on November 1, 2026, and it blends two of the most popular ideas in online poker. Called Quattro Mysteries, the series features three Mystery PKO flighted events with combined guarantees of $75,000, buy-ins starting at $1.10 and a top bounty of $5,000 in the $33 event. The format combines progressive knockout bounties with the random Vault rewards that have made mystery bounty tournaments a favorite among recreational players, and it uses a weekly multi-flight structure that rewards players who build stacks across several attempts. If you play on Americas Cardroom, the Winning Poker Network's flagship room, this is a format worth understanding before you register.
The three events
According to PokerListings, the series consists of three events that share the same structure but differ in buy-in, guarantee and top bounty:
| Event | Guarantee | Top bounty |
|---|---|---|
| $33 Quattro Mystery PKO | $50,000 | $5,000 |
| $5.50 Quattro Mystery PKO | $20,000 | $2,000 |
| $1.10 Quattro Mystery PKO | $5,000 | $500 |
Together they add up to the $75,000 combined guarantee. Satellites for the $33 event cost $3.30 and run daily starting October 31, offering a cheaper route into the biggest tournament of the three. All three share a starting stack of 5,000 chips, which equates to 50 big blinds, with late registration lasting eight levels, blind levels of eight to ten minutes and flights lasting 12 levels.
How the hybrid format works
The mechanics are the heart of the story. In a traditional progressive knockout (PKO) tournament, half of each player's buy-in goes into the prize pool and half goes onto their head as a bounty. When you knock out an opponent, you collect half of their bounty in cash and the other half is added to your own bounty. In a mystery bounty tournament, by contrast, bounties are hidden and revealed on elimination, with values drawn at random from a prize ladder that can include a very large top prize.
The Quattro Mysteries combine these ideas. Each knockout triggers a random reward from the Vault, as in mystery bounty events, and half of that reward is credited to the player's account immediately, while the other half stays on their head as a bounty, as in PKO events. If you are eliminated, the player who knocks you out triggers a Vault reward and collects the bounty on your head. That means a player who wins a showdown gets both an immediate randomized cash prize and a growing bounty that makes them a more attractive target.
Rewards become available only once Day 2 begins. The article notes that players become eligible for knockout rewards once Day 2 starts, and that the Day 1 flights do not award prizes at all. Instead, Day 1 acts as a qualifier: flights let players build a stack for more aggressive play on Day 2.
The multi-flight schedule
The schedule is built around weekly flights. Day 1 sessions each last up to one hour and 40 minutes, after which survivors advance to Day 2. According to the schedule, all times Eastern:
- Opening Sunday to Friday: flights from 2:05 pm to 12:05 pm, every two hours.
- Friday to Sunday: flights from 1:05 pm to 9:05 am, every hour.
- Final Sunday morning: extra flights at 12:05 pm.
- Final Sunday: Day 2 at 2:30 pm.
The structure allows players in different time zones to find a flight that suits them, and the frequency of flights increases toward the weekend, when more recreational players are available. The ability to re-enter multiple flights is one of the key strategic features of the format, and it also adds to the prize pool as more entries accumulate.
Why the format is interesting
The hybrid structure addresses two common criticisms of mystery bounties. First, in pure mystery bounty events, a large share of the prize pool is concentrated in a handful of enormous prizes, which makes outcomes very random. By adding a progressive component, the Quattro format ensures that every knockout builds a bounty, giving skilled players more control over their outcomes. Second, in pure PKO events, the structure can feel mechanical, whereas the Vault rewards add an element of surprise.
A mix of skill and randomness is the core of tournament poker's appeal, and formats like this are designed to adjust the balance. Online poker operators continue to experiment with structures that attract casual players without making the game purely a lottery, and ACR's move reflects that trend. We have covered related developments in our broader coverage of Americas Cardroom, and our Americas Cardroom review has more detail on the site's tournament schedule, software and payment options.
Strategy considerations
While the format is new, some principles carry over from existing mystery bounty and PKO strategy:
- Stack building on Day 1. Because Day 1 flights award no prizes, the goal is to accumulate chips rather than survive at all costs. With a 50 big blind starting stack and 12-level flights, there is room to take calculated risks, since busting simply means you can re-enter another flight if your bankroll allows.
- Bounty awareness on Day 2. Once knockouts pay out, the value of eliminating an opponent rises, which should widen your calling ranges against shorter stacks, especially when the bounty on their head is large.
- Late registration. Eight levels of late registration means you can wait to see how the field plays before deciding whether to enter, but late entry reduces your stack in relative terms, so factor in the blind levels.
- Bankroll discipline. Multi-flight formats encourage re-entry, and costs can add up. Decide in advance how many flights you will play.
Our poker strategy hub covers broader tournament concepts, and our explainers on what is ICM and what is pot odds provide the mathematical foundation for decisions at the bubble and in bounty situations. You can use our poker odds calculator to check the equity of hands in all-in spots.
Satellites and low-cost entry
The $3.30 daily satellites for the $33 event are a useful entry point for players who want a shot at the biggest guarantee without paying the full price. Satellite strategy is different from standard tournament strategy: the goal is to reach a fixed prize, a seat, rather than maximize chips, which means that survival matters more than accumulation once you are near the bubble. If you are interested in satellite formats, read our tournaments page to see how satellites fit into a broader schedule.
For players new to ACR, the site's welcome offers and rakeback programs can add value to tournament play. Our bonus page and rakeback guide explain how to evaluate those promotions, and our Americas Cardroom review covers deposit methods, including cryptocurrency options. If you prefer to play with crypto, our Bitcoin poker guide outlines the basics.
What this means for players
First, the format is a good fit for recreational players. A $1.10 buy-in with a $500 top bounty is low risk, and the weekly flights let you pick a time that suits you. Second, the format rewards preparation: understanding how the Vault rewards and bounties work will help you make better decisions on Day 2. Third, manage your budget. Multi-flight events can encourage repeated entries, so set a limit.
Finally, remember that guarantees are not guaranteed profits. Even in a well-structured event, most players will not cash, and the best approach is to treat the series as entertainment with a chance at an upside. Our bankroll management guide is a good place to learn how to protect your funds.
The bottom line
ACR's Quattro Mysteries are a clever hybrid of two popular formats, offering three events with a combined $75,000 guarantee starting November 1. With buy-ins from $1.10 to $33, bounties up to $5,000 and a weekly multi-flight structure, they offer something for both casual and serious tournament players. As always, read the structure carefully, plan your bankroll and enjoy the ride.