Play Connect Four vs Computer
Choose an opponent or pick a custom level
Frequently Asked Questions
Can I play Connect Four against the computer for free?
Yes. play4row's Connect Four AI is free to play with no account required. Pick a bot or a custom difficulty level (1–10) and start playing instantly in your browser.
How strong is the play4row Connect 4 AI?
At maximum difficulty, the engine plays perfect Connect Four — it uses the full game-theoretic solution and never misses a winning or drawing move. Lower levels limit the engine's search depth so the bot plays at a more human level, with realistic mistakes and missed tactics.
Can I choose the difficulty level?
Yes. Pick from the named bots on the setup screen for curated personalities, or use the custom slider to choose any level from 1 (very easy) to 10 (perfect play).
Do I need an account to play vs the computer?
No. The Connect Four engine page is fully public — no signup, no email, no download. Sign in only if you want to track your stats or play ranked matches against other humans.
Does the engine work on mobile?
Yes. The engine runs entirely in your browser via a Web Worker, so it works on phones, tablets, and desktops. No app install needed.