Fill a row. It clears.

Gridfold is a 9×9 block puzzle. Drag three blocks onto the board, fill a row or a column, and it clears for points. When none of your blocks fits, the run is over.

How to play

Rows and columns: Rows and columns, not boxes. A complete row or column clears. Clear two at once and they score far more than twice.
Three blocks: Three at a time. Place all three in any order you like; then the next three arrive.
Streaks: Keep the streak. Clear again within three placements and every line is worth more, up to five times as much.

Puzzle No. 1

Play a round with the real rules

Score: 0
Best this visit: 0

Your blocks

Lines: 0
Next clear: ×1

Drag a block onto the board, or pick one and tap a square. Keyboard: Tab to a block, Enter, arrow keys, Enter.

A pocket version of the real rules, starting from a printed opening. The full game starts on an empty board and adds its difficulty curve and an optional revive.

Hard, never rigged.

Gridfold gets harder as your score climbs, but only by choosing trickier blocks. The rules never change, and only the board decides when a run is over.

Every time three new blocks arrive, at least one of them fits on your board. The game goes further than that: whenever it can, it deals a set that can be placed completely, in some order. A hard set is one with awkward shapes and little room, never one with nothing to place.

A run starts gentle, so the first minutes feel generous, and builds up from there. Difficulty only ever changes which blocks you are dealt. The board stays nine by nine, a full row or column always clears, and the scoring is the same for everyone.

The run ends when none of your remaining blocks fits anywhere on the real board. Nothing else can end it: no timer, no hidden counter, and no “almost” moment staged to sell you something. Sometimes the order you place them in is what does it. That is the puzzle.

The ads have no say in any of this. The part of the game that deals your blocks has no access to ads, ad revenue or anything that guesses what you might be worth. It is built that way on purpose, and the game’s tests check it.

How a run feels

Illustration of a typical run, not data

Revive

Starts gentle

Builds up

Gets tough

After a revive: a few easier sets

The ads, in plain words.

Gridfold is free. It has one kind of ad, and you only see it if you ask for it.

Optional. Out of space? You can watch one ad to continue. Or don’t: New game is always right there.

A fair revive. Three new blocks that are guaranteed to fit. Your board and your score stay exactly as they were.

Once per run. One revive per run, and only when you choose it.

No banners. No pop-ups. No ads between games, no timers and no countdowns.

No bought losses. Ads have no say in the blocks you get, and they can’t make a run end.

Your choices. Where the law requires it, the game asks for your consent before ads use your data. You can change it any time under Pause, then Privacy choices.

From the workbench.

Real screens from the current development build. Art and details may still change before launch.

Gridfold screenshot, the board: early in a run — Fig. 1Early in a run.

Gridfold screenshot, the board: dragging a block: the board shows where it lands — Fig. 2Dragging a block: the board shows where it lands.

Gridfold screenshot, the board: later, with less room — Fig. 3Later, with less room.

Coming soon to iOS & Android.

Free to play. No sign-up and no mailing list: you will find Gridfold in the App Store and on Google Play when it launches.

Play another round

Answers: there is no answer key. Every set has a block that fits.