Lumen Hex

Read how far light travels through a hex grid and reason out which cells are solid and which are clear.

How to play

Edge beams report how far light shines through clear cells before a solid one stops it, and number clues tell you how many solid neighbours a cell has. Combine the readings to mark every hexagon correctly, with no guessing required.

• Beam clues show the light's travel distance through clear hexes
• Number clues count a cell's solid neighbours
• Mark each hex as solid or clear
• Solve the whole grid by deduction to win

Controls

• Desktop: left-click a hex to cycle its state, right-click to cycle back
• Phone & tablet: tap a hex to cycle through unknown, solid and clear

Game modes

• Daily: one shared puzzle seeded by date
• Practice: solve as many as you like
• Board sizes: Small, Medium and Large

Tips & strategy

• Start where a beam reading and a number clue overlap to lock in a certain cell
• A beam that stops short tells you exactly where the first solid hex sits
• Mark confirmed clear cells too, since they constrain the neighbouring counts

About Lumen Hex

Lumen Hex is an original free browser logic puzzle in the light-tracing deduction tradition, played on a honeycomb grid. Play instantly with no sign-up.

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