Hidden balls are inside the black grid. Fire lasers from the edges to deduce their positions.
Laser behavior:
H (Hit) — The laser hit a ball head-on.
R (Reflect) — The laser was reflected back to its entry point (ball adjacent to entry, or two deflections loop back).
Numbers — Matching numbers show where a laser entered and exited. The laser deflects 90° when passing diagonally adjacent to a ball. Multiple deflections can occur.
Click grid cells to place/remove your ball guesses. When you've placed the right number, check if you found them all!