Join the game
The rules
- Your teacher puts you at a table with up to 3 other players. Each player gets a color and 21 pieces.
- Your first piece must cover your corner of the board.
- Every new piece must touch one of your own pieces only at a corner. Your pieces can never touch along a side.
- Other colors can touch yours any way. Block them!
- When nobody can move, the player with the most squares on the board wins. Place all 21 pieces for a bonus!
How to play
1Your cornerYour first piece must cover the dashed circle in your corner of the board.
2Corners onlyEvery new piece must touch one of your pieces at a corner, and never along a side.
3Block and growOther colors can touch yours any way. Spread out and get in their way!
4Turn and flipClick a piece, then press Turn or Flip (or R and F) until it fits. Click the board to place it.
5Stuck?When you have no moves left, the game skips you. Your squares still count.
6WinMost squares on the board wins. Place all 21 pieces for 15 bonus points, or 20 if the last one is the single square.
Practice board
Play against the computer to learn the rules. Blinking dots show where your next piece can touch a corner.
Click a piece, then move over the board. Press R to turn or F to flip. Click the board to place it.
Pick a piece. Your first piece must cover the dashed circle in your corner.
The 21 pieces
Start a game room
Show this page on the board. You will get one room code for the whole class.
How it runs
- Every student types the same room code and their real first name.
- Tables fill in the order students join: Table 1 first, then Table 2, and so on.
- When you press Start, the tables are evened out so nobody plays alone.
- Each table plays its own game. Your screen shows every table, stacked.
- When every table is done, all the winners platforms appear together.
Teacher note
- Tables: choose up to 2, 3, or 4 players per table. With 13 students and 4 per table you get tables of 4, 3, 3, and 3. A table of 2 plays on a smaller 14 by 14 board so the game does not drag.
- Game length: a table of 4 takes about 20 to 30 minutes. A table of 2 takes about 10 to 15.
- Turn timer: 30, 60, or 90 seconds per turn, or no timer. When time runs out, that player misses the turn and plays again next time around.
- Absent or stuck students: press Skip turn on that table, or remove the student. A removed student's pieces stay on the board and the rest of the table keeps playing.
- Fair play: the game checks every move, so a piece can only go where the rules allow. Students can try pieces on the board while they wait, but can only place one on their turn.
- Scoring: one point per square on the board. Placing all 21 pieces adds 15 points, or 20 if the last piece was the single square.
- Late arrivals: a student who joins during a game waits for the next one.
- Rooms: a room closes by itself after four quiet hours. Many classes can play at the same time, and every room has its own code.