Rules

Digits 0–20 (single tiles for 10 through 20), operators + − × ÷, the equals sign, plus three wild faces: +/−, ×/÷, and blank.

1. Pick a tile from your rack, place it on an empty cell.
2. All new tiles must sit in a single row or column.
3. The first play must cross the centre ★.
4. Every row or column must a valid equation with at least one = sign.

• Single-digit tiles can sit next to each other to form a 2- or 3-digit number (e.g. 4, 6, 3 → 463).
• Maximum 3 digits, you cannot form a thousand or larger.
• No leading zero on a multi-digit number (01, 09 are invalid; 107 is fine).
• Two-digit tiles (10–20) cannot combine with adjacent digit tiles to form larger numbers.

• DP / TP — double/triple a single tile's points.
• DE / TE — double/triple the whole equation's points.
• The centre star acts as a 2× equation bonus on the opening play.

Using all 8 rack tiles in one play scores a bonus +40. The game ends when the bag is empty and a player clears their rack — or after four consecutive passes.