Line4 9x8 - Connect Four on a Wider 9x8 Board, Against a Neural AI
Line4 9x8 - Connect Four on a Wider 9x8 Board, Against a Neural AI
Line4 9x8 is a free four-in-a-row strategy game: drop your discs, connect four in any direction, and beat the Champion - a trained neural-network AI. Unlike classic Connect Four, the board is 9 columns by 8 rows, which opens the game up for deeper traps, double threats, and long-term plans. Play it right here in your desktop browser, no account and no download needed.
Play Connect Four against the Champion AI
Choose who moves first and pick a strength: Beginner (Easy), Intermediate (Medium), or Advanced (Strong). The Advanced champion combines a neural network with a value-guided search and an opening book - the exact same engine that powers the Android app. The strongest level, Grandmaster (Max), plays with full neural search in the Line4 9x8 app on Google Play.
Win-in-2 Tactics puzzles
Sharpen your play with 20 free solver-verified puzzles: find the only move that forces a win in two, survive the strongest defense, and finish the attack. Your progress is saved in your browser. The Android app carries the full training set - 500 Tactics puzzles, including Win in 3 and Win in 4.
Frequently asked questions
Is Line4 9x8 free?
Yes - free in the browser and free on Google Play, with no ads or tracking.
How is it different from classic Connect Four?
The 9x8 board is wider and taller than the classic 7x6, so openings matter more and double threats are harder to spot. The opponent is a neural network, not a scripted bot.
Can I play on my phone or tablet?
The web version targets desktop browsers. On a phone or tablet, the Android app is the best way to play - it includes everything the web version has, plus 500 puzzles and the Grandmaster strength.
How strong is the AI?
The Champion's strengths are benchmarked on an Elo-style ladder spanning roughly 800 points from Beginner to Grandmaster. Read more on the Champion AI page.
