If you've gotten hooked on the daily "trace one line through the whole grid" puzzle format -- the one where numbered dots need to be hit in order and the line can't cross itself -- you've probably wished there was a version that didn't run out after one puzzle a day. That's exactly the gap InkFlow fills.
InkFlow is RivalPit's free take on the format: draw one unbroken line through every square of the board, moving only up, down, left, or right, hitting numbered checkpoints in increasing order along the way. The puzzle is solved the instant your line has filled the entire grid.
What makes InkFlow different
- Endless levels. There's no daily cap and no fixed level list -- every puzzle is freshly generated, and there's no way to see a total because there isn't one. Play one or fifty in a row.
- Difficulty that actually ramps. The grid grows from a gentle 5×5 up to 8×8, and after that, checkpoints get sparser -- so the challenge keeps climbing even once the board size caps out.
- Every puzzle is guaranteed solvable. Each level is built by generating a full path through the grid first, then placing checkpoints along it -- so you're never stuck on a broken layout.
- A real Duel mode. Race a friend on the exact same puzzle in real time, first to fill the board wins.
- No download, no login wall. It's a browser game -- open it and start dragging.
How to play
- Checkpoint 1 is always your starting square -- drag from there.
- Move the line up, down, left, or right one square at a time. It can't cross itself.
- You can only step onto a numbered square when it's the next number in sequence.
- Fill every square on the board to solve the puzzle.
Made a wrong turn? Undo backs up one square at a time, and Reset clears the board to start the level fresh. Progress saves automatically, so you can pick up right where you left off next time.
Bring a friend into it
Once solo levels feel comfortable, tap ⚔️ Duel a Friend from the InkFlow home screen. Create a room, send the code to whoever you want to race, and the moment you're both ready, you're both dropped onto the identical puzzle at the identical instant -- first to trace the whole grid wins.
How to jump in
Go to rivalpit.com/inkflow on any browser, desktop or mobile, and hit Play. It's free, and there's no account required just to try it.
Frequently asked questions
What kind of puzzle is InkFlow?
InkFlow is a single-line path puzzle: draw one continuous line through every square of a grid, moving only up, down, left, or right, never crossing itself, while passing through numbered checkpoints in order starting from 1.
How many levels does InkFlow have?
InkFlow's levels are endless and generated on the fly — there's no fixed level list or visible total, and each level is randomly built to be a bit harder than the last.
Is InkFlow free and does it need a download?
Yes. InkFlow runs entirely in your browser, free, with no download or app install, on desktop or mobile.
Can I play InkFlow against another person?
Yes — InkFlow's Duel a Friend mode puts two players on the exact same puzzle at the same time and races them to fill the board first.