What causes match-3 no-valid-moves detection?

The game does not correctly detect when no matching move exists, so the board deadlocks with no possible play, or it reshuffles when valid moves actually remain.

How do I catch this when it only happens for some players?

Capture it automatically from the player's device with the full stack trace, the device and OS, the build, and a breadcrumb trail of what they did. That turns a vague complaint into a specific, reproducible issue you can fix without owning the hardware it happens on.

How to Fix No-Valid-Moves Detection in a Match-3 Game

Quick answer: Scan the board for any swap that would create a match after each change, reshuffle only when none exists, and guarantee the reshuffle produces a solvable board.

Match-3 deadlocks are faulty no-move detection. Scanning for possible swaps fixes it. Here is how.

How to fix it

1. Scan for any valid swap

After the board settles, test every adjacent swap to see if it would form a match. If at least one does, there are valid moves. Faulty detection either deadlocks or reshuffles unnecessarily.

2. Reshuffle only when stuck

Trigger a reshuffle only when no valid swap exists. Reshuffling while moves remain frustrates players who saw a play; never reshuffling when stuck deadlocks the board.

3. Guarantee a solvable reshuffle

When you reshuffle, ensure the new arrangement has at least one valid move (re-roll until it does). A reshuffle that itself has no moves leaves the player stuck again immediately.

Catching the ones you can't reproduce

The hardest version of this to fix is the one you can't reproduce — it only happens on a player's hardware, OS, driver, or save state, under conditions that simply aren't present on your machine. A report that says “it crashed” or “it froze” gives you nothing to act on, so the bug survives release after release while quietly costing you players.

Automatic error capture closes that gap. Each failure arrives with its full stack trace, the device and OS, the build number, and a breadcrumb trail of what the player did right before it broke, so even a failure you have never seen becomes a specific, reproducible issue. Fold identical failures into one signature ranked by how many players each hits, and your worklist sorts itself worst-first instead of arriving as a stream of vague complaints.

This is where a tool like Bugnet earns its place. Its SDK captures every error automatically with the full stack trace plus device, OS, memory, build, and game-state context, folds duplicates into one grouped issue with an occurrence count, and ties each to the build it first appeared on — so you fix the problem that hurts the most players first and confirm it is gone when its signature disappears from the next release.

A crash you can name from its stack trace is a crash you can usually fix in minutes.