Stack Up: Blocks

Drag pieces onto an 8×8 board and fill whole rows and columns to clear them. The twist: every block carries a number, and a piece can land on top of matching blocks. Drop a 2 onto a 1 and it becomes a 3; drop a 6 onto a 6 and it becomes a 12.

Stacking saves space, but big numbers are hard to stack on and can box you in. Clear them early to stay safe, or grow them first for a huge score. Combos, power-ups, a Daily puzzle that is the same for everyone, and Game Center leaderboards and achievements.