3D Four in a Row

Challenge an AlphaZero-trained AI at 3D four-in-a-row. Eight difficulty levels tuned by thousands of measured self-play games — from beginner to master. Offline, no ads.

■ 3D Four in a Row Line up four balls in any straight line — across, up, or diagonally — on a 4×4×4 board. Balls stack from the bottom of each rod. One minute to learn, surprisingly deep to master: 76 winning lines to fight over.

■ A Serious AI Powered by a neural network trained with AlphaZero-style self-play. Difficulty comes from search depth, not artificial handicaps, so every level plays naturally.

8 levels, from Lv1 Beginner to the mysterious Lv8 Level gaps tuned with thousands of measured self-play games Win games to unlock the next level The top level is "Death Mode": all assists forced off ■ Comfortable to Play

Rotate the board with one finger, pinch to zoom Two-tap moves with a preview ball prevent misplays Opponent threats in red, your winning moves in gold (optional) One free undo per game; further undos make the game unranked Color-coded board sides keep you oriented Per-level match records ■ Private by Design

Fully offline. No data collection, no ads Japanese / English Can you reach Lv8?