Facet

Bag

Pick a number, then tap corners: it stays in your hand, so you can place it again and again until the bag runs out of it. Turn on Corner first under the gear icon to also pick a corner first, then a number, for one placement.

Rings and chips show what a move would do. Green: a cell snaps. Gold: two or more snap at once. Red: one bursts. Colour hints under the gear icon turns those colours off.

Stuck? Turn on the Hint button under the gear icon. It marks the next corner in gold and puts its number in your hand: tap the gold corner. You start with 3 hints. At 0, the button offers a refill; refills also live under the gear icon.

With Corner first on, let go of a picked corner by tapping it again or tapping open cell area.

Keys 1 to 7 pick a number, Esc puts it back, Z undoes, H asks for a hint.

Cell

Hover a cell.

Hover a cell on the board, or tap it, to read it here: how many sides it has, its Apex, what its corners add up to so far, and its state: open, snap, burst or stuck.

Corners: a number is placed, _ is empty, · is frozen. A stuck cell shows a lock on the board: its empty corners are frozen, so it can never snap.

Rules

Game Basics: a short walkthrough, five steps.

Each cell shows its Apex: the total its corners must reach. A number on a corner counts for every cell that touches it. Reach the Apex exactly and the cell snaps: you claim its area. Go past it and it bursts. A snapped cell freezes its empty corners. The bag is all you get. Claim 70% of the area to clear a level.

Difficulty (under the gear icon): Easy clears at 70% of the area. Medium at 80%. Hard at 90% with at most 3 empty corners. Expert wants every cell and every corner. A corner that froze empty, or that nothing can claim, counts as empty.

Open corners (the Daily and Duel): the corners left without a number when a board ends, shown in brackets after its score, as in 100 [2]. On the same area, fewer wins, then the faster time.

Clock

Refill

Game Basics

Bag