One Stroke — Free Online One-Line Puzzle Game
One Stroke is a fast, elegant browser puzzle game from Game CMB. The rule is simple: connect every point on the board using a single continuous stroke, without ever lifting your finger or mouse, and use every line exactly once. It takes seconds to learn and a lifetime to master — the kind of "just one more try" puzzle that keeps players coming back.
How to Play One Stroke
- Pick a glowing starting point on the board.
- Drag or swipe along connected lines between points.
- Use every line on the board exactly once — no repeats, no gaps.
- Keep your finger or mouse down the entire time; lifting early breaks the stroke.
- Finish with zero mistakes, hints, or restarts for a Perfect Run bonus.
Game Modes
- Classic: 100 progressively harder hand-tuned difficulty tiers, from simple 4-point shapes to complex multi-branch graphs, then endless procedurally generated puzzles beyond level 100.
- Daily Challenge: One puzzle a day, identical for every player, so you can compete fairly on the daily leaderboard.
- Endless: Chain puzzles back to back to build your streak and cumulative score before a mistake costs you momentum.
Why One Stroke Is So Addictive
Every puzzle in One Stroke is verified solvable before it's shown to you — no dead-end graphs, ever. The scoring system rewards speed, precision, and clean solves with a streak system and a 1.25x Perfect Run multiplier, and every score is verified server-side so the leaderboard stays fair. Dark neon visuals, glowing nodes, and satisfying particle effects make every solve feel great — and every near-miss makes you want to hit restart immediately.
Frequently Asked Questions
What is One Stroke?
One Stroke is a free online puzzle game where you connect every point on a graph using a single continuous line, never lifting your finger or mouse, and using every line exactly once.
Is One Stroke free to play?
Yes. One Stroke is completely free to play in your browser on Game CMB, with no download or signup required.
How is my score calculated?
Your score starts at a base value and is adjusted for completion time, mistakes, hints used, and restarts, then scaled by level. A perfect run with no mistakes, hints, or restarts earns a 1.25x bonus.
What is the Daily Challenge?
Every day, Game CMB generates one puzzle that is exactly the same for every player, so you can compete fairly on the daily leaderboard.
Can I play One Stroke on mobile?
Yes, One Stroke works on iPhone Safari, Android Chrome, and all major desktop browsers, with touch controls optimized for mobile play.