Cluster pays explained: why matching symbols may not connect

Cluster pays awards qualifying connected groups of matching symbols. The rules decide the minimum size, permitted connections, and special-symbol treatment; a large total scattered across the screen may not form one winning cluster. In the two rule examples below, matching symbols connect horizontally or vertically. Corner contact alone does not join them.

That distinction answers a common reading problem: “I can see enough matching symbols, so why did they not pay together?” Count each connected group before consulting its payout band.

What makes a cluster pay?

A cluster is a group whose symbols can be reached from one another through the permitted connections. Under a horizontal-and-vertical rule, you can move up, down, left, or right between matching neighboring cells. A route can bend; it does not have to be one straight line.

The Reactoonz rules hosted by Loto-Québec, page 3, require five or more matching symbols touching horizontally or vertically. The Elemento Dragons rules, page 2, also specify five or more, and explicitly evaluate disconnected clusters of the same symbol separately.

Both documents use a five-symbol minimum, but that threshold is not universal. One is a Québec operator’s rule sheet; the other is a supplier’s public English rule file. Neither confirms current U.S. state approval or a casino’s active build.

Do diagonal symbols or separate groups count together?

Under the edge-touching rule above, two symbols touching only at a corner remain separate. Likewise, two disconnected groups do not become one group just because both use the same symbol.

Consider this invented 4×4 teaching grid, not either game’s layout, settings, or recorded outcome. Every letter occupies one cell. For this exercise only:

• Only A can win; dots are inert cells.
• Connections are horizontal or vertical, never diagonal.
• A connected group needs at least six As to qualify.
• There are no wilds, scatters, multipliers, refills, or other awards. Evaluate the displayed grid once.

Read the four rows from top to bottom:

AA..
AA..
..AA
..AA

There are eight As overall. The top-left square contains four; the bottom-right square contains four. Those squares touch only at a corner, so each remains a group of four. Neither reaches the fictional six-symbol minimum. There is no qualifying cluster.

Now change just row 2, column 3 from a dot to A:

AA..
AAA.
..AA
..AA

The added A touches the left group horizontally and the lower group vertically. All nine As now belong to one connected group.

Display	Connected A groups	Qualifying clusters
Before	4 and 4	0
With the bridge	9	1

The calculation is 4 + 1 + 4 = 9 connected cells after the bridge. It is not a sum of independent chances or nine separate payouts. No payout amounts or symbol probabilities were supplied, so this exercise cannot calculate money won, RTP, or the chance of seeing either grid.

How does cluster pays differ from ways and pay anywhere?

The location test is different. Large grids and falling symbols can look similar while using different award rules.

Evaluation	What you check
Cluster	Connected matching group and its minimum size
Adjacent-reel ways	Eligible matching positions on the required sequence of reels
Pay anywhere	Matching-symbol count over the eligible screen, as defined by the rules

A ways rule need not require symbols on neighboring reels to share a cell edge. A fixed payline instead checks a specified path. Our paylines versus ways guide explains those systems; neither should be imposed on a cluster rule.

For a limited pay-anywhere contrast, Pragmatic Play’s Sweet Bonanza page describes matching symbols anywhere on the tumbling grid. That public synopsis is not a version-specific help file or evidence of U.S. availability. It shows why “symbols tumble” does not, on its own, mean “symbols must connect.”

Also distinguish a screen-wide payout rule from a special symbol named Scatter. Its name alone cannot tell you which ordinary symbols count together.

Can wilds, scatters, or cascades change the group you should count?

Yes, if the applicable rules give them that effect. Do not fill the gaps with assumed substitution. Elemento Dragons, page 3, gives wilds a separate evaluation within each cluster they join; it also excludes its Multiplier symbol from cluster wins. That treatment belongs to this document, not every game.

For an unclear display, check:

1. Eligible cells and symbols: are any positions excluded or reserved for a feature?
2. Connections: which directions count, and can an authorized wild bridge a gap?
3. Group size: does each separate group meet the threshold and payout band?
4. Evaluation stage: are you reading the settled grid or an intermediate feature animation?

A refill can create a new arrangement that needs a new check. It does not let you add disconnected symbols from earlier displays to the current group unless the rules explicitly provide a collection system. Cluster evaluation describes what qualifies now; the continuation feature describes what happens next.

Use the special-symbol guide for substitution and trigger distinctions, and the paytable checklist to record unresolved rules. More cells, larger groups, or repeated animations do not establish better odds or a profitable session. Those conclusions require evidence beyond the visible pattern.