play4row is a free competitive Connect Four platform you play straight in your browser - no download, no install, no ads.

Find an opponent in seconds with real-time multiplayer matchmaking, or take on the built-in AI engine at the difficulty that suits you. Every finished game can be replayed move by move on the analysis board, which labels each move from best to blunder so you can see exactly where the game turned.

Competitive play is backed by a Glicko-2 rating system, so your rank reflects real skill rather than raw game count. Daily puzzles drawn from real positions train the tactical patterns that decide close games: spot the winning threat, block the trap, count the odd and even squares.

Features:

Real-time online multiplayer with quick matchmaking and private rooms

AI opponent with multiple difficulty levels

Full game analysis and move-by-move review

Connect Four puzzles with their own rating and streaks

Glicko-2 competitive rating and leaderboards

Friends, chat, challenges and tournaments

Free, with no ads

Available in English, Spanish, French and German. Works in any modern browser on desktop and mobile.