Arcade works offline without an account. Runs and records stay on this device; signed-in records sync when connected.

Line up exactly three numbers, across or down, that add up to zero. They vanish and the blocks above fall.

Rated human duels update Elo separately for each puzzle and difficulty. Friendly duels and computer practice do not change Elo. The result shows your saved rating change.

The server keeps both boards moving. Reconnect within 30 seconds to continue. Leaving or failing to reconnect can lose the battle.

Open Account, then Manage account. Clerk manages your email, password, linked accounts and security options.

Open Account → Privacy & blocking to limit friend requests and duels, or block a player.

Choose Report from the player’s menu and describe the problem in Support. Reports are private to you and the support team.