Circuit Trace

Draw one unbroken line that reaches every numbered node in order — and fills every last cell.

Loads instantly in your browser — no download.

Paste this wherever you want the game to appear. It is free, needs no account, and the game carries no ads and no third-party trackers. Please keep the credit link underneath — that is the only thing we ask in return.

Size

Responsive 640 × 480 800 × 600

Responsive keeps the frame inside your column on a phone. Fixed sizes are easier to drop into an older layout.

HTML to paste

<div style="position:relative;width:100%;aspect-ratio:16/10">
  <iframe src="https://www.gamedavinci.com/embed/circuit-trace/" title="Circuit Trace"
    style="position:absolute;inset:0;width:100%;height:100%;border:0"
    allow="fullscreen; autoplay; gamepad" loading="lazy"></iframe>
</div>
<p><a href="https://www.gamedavinci.com/game/circuit-trace/">Circuit Trace</a> by <a href="https://www.gamedavinci.com/">GameDavinci</a></p>

Or just the iframe URL

For game portals and directories that ask for a URL rather than markup.

Terms & all games →

About this game

Circuit Trace is a pure logic puzzle built on a single, unforgiving rule: draw one continuous line that reaches the numbered nodes in order and fills every cell on the board. Not most cells — every one. That second half is what turns a simple connect-the-dots into a real deduction problem, because the route that obviously links 1 to 2 is almost never the route that leaves the rest of the grid solvable. You learn to read the board backwards, spotting the corner that will strand you twenty moves from now. Walls block certain crossings and are never decoration: each one exists to rule out a wrong answer, so every board has exactly one solution and every solution can be reasoned out rather than guessed. Puzzles are generated fresh each time, never repeated, and the grid grows as you go — a gentle five-by-five to start, then six-by-six, then a seven-by-seven that will genuinely make you stop and think. Drag to draw the trace and drag backwards to rub it out, or play entirely from the keyboard with the arrow keys or WASD and Z to step back. A timer tracks each solve and your best run at every board size is remembered between visits, so there is always a number to beat. It is the kind of puzzle that looks trivial for about fifteen seconds, then quietly takes over your afternoon — no reflexes, no timers forcing your hand, just you and one line that has to go everywhere.

Controls

Drag from node 1 to draw the trace; drag back along it to erase.

Keyboard

Arrow keys or WASD to extend.
Z or Backspace to step back.

How to play

Draw one unbroken line that starts at node 1, reaches each numbered node in ascending order, and passes through every cell on the board exactly once.

The line cannot cross itself, skip a cell, or pass through a wall.
Filling the grid is the hard part — plan the whole route before committing, because a path that reaches the next number the easy way will often strand a cell you can no longer reach.
Drag backwards or press Z to undo when you paint yourself into a corner.

Read the full Circuit Trace rules and strategy →