Terni Lapilli is the Roman game that inspired tic tac toe — but with one big twist. Pieces move.
1
Place phase: Each player places their 3 pieces one at a time on any empty square.
2
Slide phase: Once all 6 pieces are on the board, take turns sliding one piece to an adjacent empty square. Pieces never leave the board.
3
First to get 3 in a row — across, down, or diagonal — wins.