Last updated: May 2026. Grid behaviour analysis from in-game observation across 250+ spins at the four featured Aussie casinos.
Pirots 3's grid isn't static. It starts at 6 reels × 7 rows (42 cells) and grows to a maximum of 7 reels × 8 rows (56 cells) as cascades chain together. That 33% increase in playable area is one of the most important mechanics in the game — bigger grid means more potential parrot collections, more potential cascades, and a meaningfully higher chance of base-game wins above 50×. This article unpacks how the expansion works, when it triggers, and why it matters for your bankroll.
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The three grid sizes
Pirots 3 cycles through three grid configurations during a spin:
| Stage | Grid | Cells | When |
|---|---|---|---|
| Base | 6 × 7 | 42 | Every spin starts here |
| Stage 1 | 7 × 7 (or 6 × 8) | 49 | First expansion trigger |
| Stage 2 (max) | 7 × 8 | 56 | Second expansion trigger |
The maximum grid is 33% larger than the base. That's a lot of additional symbol real estate.
In the bonus round, the grid starts at maximum 7 × 8 from the very first spin and stays there for the whole bonus. This is one of the main reasons bonus-round wins dwarf base-game wins.
How expansion triggers
The grid grows during a single spin's cascade chain. The trigger isn't a specific symbol — it's the cumulative behaviour of the spin's collection.
Approximate triggers (based on in-game observation):
- Stage 1 expansion — happens after a parrot's first significant collection chain within a spin. Adding 4+ gems to the spin's payout typically triggers it.
- Stage 2 expansion (max) — happens after further chained collections. Roughly 8+ gems collected in cumulative chains within the spin.
The exact thresholds appear to be tied to the spin's "collection score" rather than specific gem counts, but the result is consistent: the more your spin produces, the more the grid grows.
The expansion happens visually as a new row/column slides in with sound effect. You see it happen.
Why bigger grids produce bigger wins
The mechanic creates a positive feedback loop within a spin:
- A small collection happens. Parrot walks, absorbs a few gems.
- Cascade refills the grid.
- Grid expands. More cells now available.
- New cascade fills the bigger grid. More symbols, more potential adjacencies.
- More parrots collect. Bigger payout for the spin.
- Grid expands again. Now at maximum.
- Final cascades on a 56-cell grid. Single-spin payout reaches 100×, 200×, 500×.
This is the engine of the rare-but-real 1,000×+ base-game wins. They happen when the expansion feedback loop runs to full extent within a single spin.
Stage-by-stage win potential
Approximate win potential per spin, by grid stage reached:
| Stage reached | Average single-spin payout | Top observed |
|---|---|---|
| Base 6×7 only | 0.0x – 2x bet | 30× (rare) |
| Stage 1 (49 cells) | 1x – 20x bet | 150× |
| Stage 2 max (56 cells) | 5x – 100x bet | 500× (base game), 5,000×+ (bonus) |
Most spins resolve at base 6×7 with no expansion (the parrots don't produce enough chain to trigger growth).
A meaningful minority — maybe 5-10% of spins — reach Stage 1 expansion.
A small fraction — 1-2% of spins — reach Stage 2 maximum.
When max is reached, big wins follow.
Reset behaviour
Outside the bonus round, the grid resets to base 6×7 at the end of each spin. You don't carry expansion forward.
Inside the bonus round, the grid is permanently 7×8 for the entire round. Every spin happens on maximum geometry. This is why bonus-round wins are so much larger than base-game wins — every spin has the full 56-cell potential.
How the grid actually expands visually
The animation is one of the game's strongest UX touches:
- A row of new cells slides into the grid from the top or bottom (depending on the variant).
- New symbols cascade into the new cells.
- The screen briefly highlights the newly available row/column.
- The parrots' walk paths adjust to include the new cells.
Visually, it feels like the game is rewarding you with more room to play. Mechanically, that's exactly what's happening.
Expansion in the base vs bonus
| Aspect | Base game | Bonus round |
|---|---|---|
| Starting size | 6 × 7 (42 cells) | 7 × 8 (56 cells) — max from spin 1 |
| Can grow during spin? | Yes, up to 7×8 | Already at max |
| Persistence between spins | No — resets each spin | Yes — stays 7×8 throughout |
| Win impact | Big spins go bigger when grid expands | Every spin has max-grid potential |
The bonus's permanent max grid is one of the strongest features of the bonus round. It's why bonus payouts dwarf base-game payouts in the long-run average.
Designing your session around grid expansion
You can't control when the grid expands — it's RNG-driven by your spin's chain progression. But you can structure your session to maximize the value of expansion when it happens:
Lower bets early. When you're learning the game, expansion is exciting but rare. Don't burn high stakes during the learning curve.
Watch the cascade rhythm. When a single spin produces multiple cascade chains, lean in — that's the moment expansion likely triggers. Don't auto-spin through it; watch the screen.
Bonus prep. When you trigger the bonus, you start at max 7×8. Mentally prepare for the bigger geometry — collections happen faster, multipliers stack faster, and the round feels different from the base game.
Don't chase expansion. Increasing your bet because "the grid hasn't expanded in 50 spins" is gambler's fallacy. RNG doesn't track your session.
Comparison — grid expansion across pokies
Grid expansion isn't unique to Pirots 3, but few games execute it as cleanly:
| Pokie | Grid expansion | Mechanic |
|---|---|---|
| Pirots 3 | 6×7 → 7×8 | Cascade-driven |
| Pirots 2 | 7×7 → 7×7 with rows | Similar mechanic |
| Pirots 4 | 6×6 → 7×8 | Newer variant |
| Megaways games (BTG-licensed) | Variable per reel | "Megaways" is column-by-column expansion |
| Hacksaw's Le Bandit | No expansion | Fixed grid |
Pirots 3's expansion is cleaner than Megaways' because it's binary (small or big), not continuous (variable per spin). Players can see exactly what stage they're at.
Mobile-specific grid notes
On mobile, the grid expansion is especially impressive:
- Portrait orientation — the grid fills the screen edge-to-edge. Expansion makes individual cells slightly smaller but the parrots' walking animation remains clear.
- Landscape (iPad/tablet) — best visual experience. The grid sits centrally and expansion has room to "breathe."
Some smaller phones (iPhone SE, older Pixels) feel cramped at Stage 2 max — text on cells becomes hard to read. If you have access to a larger device, use it.
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Quick FAQ
Can the grid stay expanded between spins? Not in the base game (resets each spin). In the bonus round, the grid stays at max 7×8 throughout.
What triggers the first expansion? Approximately 4+ gem collections in a single spin's cascade chain.
Can I force expansion via X-iter? X-iter doesn't directly buy expansion. Some X-iter tiers (Tier 4 and 5) buy bonus access, which guarantees max-grid for the bonus round.
Is the bigger grid always better for the player? Yes — more cells means more potential collections, which means bigger wins. The bigger grid is mathematically favourable.
Does the grid ever go smaller than 6×7? No — 6×7 is the minimum.
Why isn't the base grid 7×8 to start? The expansion mechanic is part of the game's reward feedback loop. Starting small and growing keeps each spin's progression visually clear.
Are the new cells different from the original 42? No — same symbol pool, same gem probabilities. The new cells just add room for more symbols of the same type.
About this grid guide
Based on in-game observation across 250+ spins at the four featured casinos, plus analysis of cascade behaviour and expansion timing during April-May 2026.
Gambling responsibly. Grid expansion is exciting, not predictive. The next spin's geometry doesn't depend on the previous spin's. Set deposit limits before depositing. AU support: gamblinghelponline.org.au · BetStop · 18+ only.
Further Reading
Related reading in this guide: