A beacon hides somewhere on the coordinate plane, fire at lattice points and let each compass arrow guide you in until you land dead on it.
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How to play
Click a lattice point on the four-quadrant grid to take a shot. The only reply is an eight-way compass arrow pointing toward the hidden beacon, North means higher y, East means higher x, with the distance kept secret. Reason from the directions to triangulate the exact point, then move on to the next beacon in the run. Fewer total shots scores higher.
Each shot returns only a compass direction, never how far.
Combine the signs of several arrows to box in the beacon's coordinates.
Land exactly on the point to mark it FOUND and reveal the next target.
Clear all the beacons in the run to finish.
Game modes
Daily: the same beacon chain for everyone, in Easy, Medium, or Hard.
Practice: fresh random chains at your chosen difficulty.
Controls
Desktop: click a lattice point on the grid to fire a shot.
Phone & tablet: tap a lattice point to fire, the arrow and readout show the direction.
Tips & strategy
Open near the centre so the first arrow rules out a whole quadrant.
Use a vertical and a horizontal probe to fix the x and y bands separately, like binary search.
When an arrow points straight N, S, E or W, the beacon shares that exact row or column.
What you'll learn
Beacon Grid makes the coordinate plane click into place, every shot forces you to read direction from the x- and y-axes and reason across all four quadrants to pin the hidden point.
Skills: coordinate plane and quadrants, x/y direction, triangulation, binary-search reasoning
Best for: roughly grades 5–9 (ages 10–14)
For parents & teachers: turns plotting points and reading direction into a puzzle, reinforcing graphing without rote drilling.
About Beacon Grid
Beacon Grid is an original, free browser puzzle that turns coordinate-plane reading and triangulation into a guessing game of directions. No download or account needed.
A free, original browser game on PlayPendium. No download, no install.
