Expanding
Tic‑Tac‑Toe
The grid grows · your moves haunt you
Round
X
0
Round
1
O
0
Grid 3×3
·
Connect 3
Winning line
Win ends → wall
Loser’s last move → wall
Wall
New cell
Carried over
Round 1: 3×3 · connect 3
Round 2: 5×5 · connect 4
Round 3: 7×7 · connect 5
After each round: both ends of the winning line + loser’s last move become walls
Loser goes first next round · old marks stay on the board
After each round: both ends of the winning line + loser’s last move become walls
Loser goes first next round · old marks stay on the board