The Diamond Poker Series PLO Grand Slam fires September 15-22 at the Bombay Club in Tallinn, Estonia, with 21 events across eight days and more than €2,500,000 in total guarantees. It is the third stop of the 2026 season, following Malta and Tirana, with a fourth still to be announced.
The schedule is built around two pillars, each carrying a €1,000,000 guarantee: the €5,000 "5k Million," running two starting flights on September 17-18 with Day 2 on Saturday and a final day on September 20, and the €10,000 Championship, which begins Sunday and concludes Tuesday, September 22. Around those sit High Rollers, satellites, turbos, bounty events and format-specific Omaha tournaments, with players housed at the Nordic Hotel Forum.
A Tour Built Entirely on One Game
What makes the Diamond Poker Series interesting is not any individual event but its premise. It bills itself as "the Home of PLO" and runs four stops a year across Europe, each built to the same template: a €1 million guaranteed 5k, a €1 million guaranteed 10k, and a supporting schedule that is Omaha from top to bottom.
That is a genuinely unusual proposition. Nearly every major live festival is a No-Limit Hold'em event with Omaha tournaments appended — one PLO championship, perhaps a PLO high roller, and a handful of side events. The Diamond series inverts that entirely, and the fact that it can sustain two seven-figure guarantees per stop across four stops a year says something about how far Omaha has come as a live format.
Ten years ago a dedicated PLO tour with €1 million guarantees would have been commercially implausible in Europe. Omaha was a specialist's game, played by a small circle of cash-game professionals and largely absent from tournament schedules outside mixed-game events. That it now supports its own tour is one of the clearer indicators of the shift in what tournament players want to play.
Why Omaha Has Grown
The explanation most players give is straightforward: Hold'em feels solved and Omaha does not.
That is imprecise as a technical claim but accurate as a description of the experience. No-Limit Hold'em has not been solved, but the strategic frontier has narrowed considerably. Preflop ranges are broadly standardised at every stack depth, postflop bet-sizing trees have converged, and the training material available to a motivated player covers most common spots. The consequence is that edges are thinner and the study required to maintain them is larger.
PLO's strategy space is orders of magnitude bigger. A Hold'em player holds one of 1,326 starting combinations; an Omaha player holds one of 270,725. Solver work on four-card games is computationally heavier, harder to compress into memorable heuristics, and much less thoroughly disseminated. The result is that PLO fields contain a far wider distribution of skill than equivalent Hold'em fields — which is precisely what makes them attractive to the professionals and what makes them enjoyable for the recreational players who keep showing up.
Our Omaha guide covers the fundamentals, and the Hold'em vs Omaha comparison walks through the structural differences that trip up crossover players.
The Tallinn Choice
Estonia is not the first place most players think of for a European poker festival, and the Bombay Club has built a specific reputation over the past several years as a venue that runs serious tournaments without the overheads of the Mediterranean circuit.
The economics work in the festival's favour. Tallinn is inexpensive relative to Barcelona, Monte Carlo or Malta, well connected to Northern and Eastern Europe by budget carriers, and small enough that a festival occupies the city rather than disappearing into it. The tour has leaned into this with hotel packages, including free five-star stays tied to buy-in levels — a promotional structure that materially reduces the effective cost of attending for players committing to multiple events.
Mid-September is also a comparatively open window on the European calendar, sitting after the Barcelona rush and before the autumn festivals cluster.
What This Means for Players
PLO tournament structures are not Hold'em structures with different cards. Pot-limit betting keeps stack-to-pot ratios higher through the streets, which means postflop play matters more and preflop all-in confrontations matter less. A short stack in PLO has fewer good options than a short stack in Hold'em, because shoving preflop with a four-card hand rarely carries the equity advantage a Hold'em shove does. Playing a deeper stack well is disproportionately valuable.
Nut-hand discipline is the whole game. The single most expensive habit Hold'em players import to Omaha is continuing with strong-but-not-nut hands. The second-nut flush is a losing hand at scale; a non-nut straight is routinely drawing dead. Learn to fold hands that would be monsters in Hold'em, and most of the difference closes.
Redraws decide stacks. The concept with no Hold'em equivalent: a hand that is currently the nuts with no way to improve is far weaker than one that is currently the nuts and draws to a better nuts. Getting stacks in with the former against the latter is the standard way competent Hold'em players lose money in Omaha. Our poker odds guide covers the arithmetic and the poker odds calculator lets you run four-card matchups directly — worth doing, because the equities are consistently closer than intuition suggests.
Budget for variance, not just buy-ins. PLO has higher variance than Hold'em at every stack depth, because equities run closer and more hands reach showdown. A festival bankroll sized for Hold'em tournaments is undersized for the equivalent PLO schedule. Our bankroll management guide covers appropriate cushions for high-variance formats.
Satellites are the efficient route in. With a €5,000 and a €10,000 as the headline events, the satellite programme is where most recreational players should be looking. Satellite play requires its own adjustments — survival dominates chip accumulation near the bubble — and it remains one of the highest-ROI skills available to a live tournament player.
The Omaha Calendar Beyond Tallinn
Players who catch the format have more options than at any point in the game's history. WCOOP's three PLO Main Events run online on September 28 at $109, $1,050 and $10,300, giving Omaha its own dedicated Main Event day for the first time. Most major online rooms now run full Omaha schedules — our tournaments hub tracks current series, and Americas Cardroom, BetOnline and TigerGaming all carry regular PLO traffic for players who want to build volume between festivals.
The Diamond series has a fourth 2026 stop still unannounced. If Tallinn draws the fields the tour's first two stops did, the case for a dedicated PLO circuit stops being a novelty argument and starts being an obvious one.