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How to Play

5 minutes to learn. A lifetime to master!

Earn points by making discs explode.


Exploding a numbered disc ADJACENT to another disc advances that disc one more step toward its own eventual explosion.

Disc progression — each explosion advances adjacent discs

A numbered disc explodes as soon as you've made the height or length of its column OR row equal to the number inside the disc.

Column example — a 4 explodes when the column is 4 tall

Here, the 4 will explode when we make the stack 4 discs tall. The adjacent stone under the 4 will also 'crack' in this case.

Here, the 3 will explode when we make the row 3 discs wide.

Row example — a 3 explodes when the row is 3 wide

Exploding discs adjacent to a gray stone will make that stone crack, then explode.

Stone cracking example

When this stack becomes 4 high, both 4s explode, and the adjacent stone at the bottom also explodes, revealing a numbered disc.

Chain reaction surge example

When a "buried" disc explodes, others drop to fill its space, often causing a chain reaction ("surge").

For a high score, try to get the largest "surges".

Careful: Every 5 discs, another fresh row of stones will rise from the bottom!

Row rise mechanic

The game is over when any stone or numbered disc protrudes above the top of the grid.

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