Ultimate Tic Tac ToePick a 3x3, 5x5, or 7x7 board and connect three or four marks in a row to win, playing solo against a smart AI or locally with a friend.
Ultimate Tic Tac Toe
Ultimate Tic Tac Toe swaps the familiar 3×3 grid for something with actual room to think. Before the round starts you pick a board size — 3×3, 5×5, or 7×7 — and the win condition scales with it: three in a row still wins on the small board, but the bigger grids need four marks lined up, horizontally, vertically, or diagonally. That one change turns a game most people can solve in their head into something closer to Connect Four, where you’re watching two or three lines develop at once instead of racing to fill a single row.
You can play solo against the built-in AI or pass the same device back and forth in local two-player mode. The computer opponent isn’t decorative — on the 5×5 and 7×7 boards it actively hunts for its own three-in-a-row setups before it bothers blocking yours, so leaving two open lines unguarded gets punished quickly. Win a round in single-player and your score carries over to the next one, so there’s a reason to keep playing past the first match.
Controls
Click or tap any empty cell to place your mark there. There’s no keyboard input — the whole game runs on pointer clicks, which makes it just as playable on a touchscreen as with a mouse.
Tips that actually help
- On 5×5 and 7×7, don’t fixate on one line — the AI will often let an obvious three-in-a-row sit unblocked if it has its own near-complete line elsewhere, so scan the whole board before each move.
- Building two potential lines that share a single empty cell creates a fork the AI can’t block with one move — look for that intersection early rather than only reacting to threats.
- Start with the 3×3 board if you want a quick, low-stakes round; jump to 7×7 when you want a match that actually takes a few minutes to resolve.