Tic-Tac-Toe
The classic 3×3 noughts and crosses. Play a friend locally on one device, or take on the AI in easy (random) or hard (perfect minimax) mode. First to line up three wins.
- Mobile-friendly
- Keyboard support
- No installs
How to play
Tic-Tac-Toe is played on a 3×3 grid. Player X always moves first, then players alternate placing their mark in an empty cell. The first player to line up three of their marks horizontally, vertically or diagonally wins. If all nine cells are filled and no one has three in a row, the round is a draw.
In 2 Players mode two people share the keyboard. In AI · Easy the computer plays randomly with a basic win-or-block instinct. In AI · Hard it uses the minimax algorithm with alpha-beta pruning and will never lose — your best result is a draw.
Strategy tips
- Take the centre on your opening move — it is part of four winning lines.
- If you go second and your opponent took the centre, grab a corner.
- Look for "forks": a move that creates two winning threats at once.
- Always block your opponent's two-in-a-row before chasing your own win.
Controls
- Click or tap an empty cell to place your mark.
- Use the mode switcher to pick 2-player, AI Easy or AI Hard.
- New round clears the board but keeps the running score.
Frequently asked questions
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