Beam Gallery

Beam Gallery is a lighting puzzle. A hall with blocks scattered through it, and your job is to place lamps until every open square is lit. A lamp shines along its row and column until a block stops it. That is also the catch: if one lamp can see another down a clear line, the arrangement is wrong, and both turn red to tell you so. Numbered blocks say exactly how many lamps touch them — a 0 rules out four squares in one go. Tap once for a lamp, twice for a small dot meaning no lamp here, three times to clear the square. The dots are not decoration; ruling squares out is usually what makes the next lamp obvious. Every hall in Beam Gallery was built with a valid arrangement first, and then its numbers were removed one at a time for as long as the arrangement stayed the only one. There is nothing to guess. Ten halls, from a small room with four blocks up to a large one with eighteen. Each hall is fixed to its level, so you can come back to the one that stopped you. Offline, no accounts, no forced ads, nothing to buy. Features: - Light every square, and never let two lamps meet - Numbered blocks count the lamps touching them - Lamp, dot or empty on every tap - Clues trimmed to the minimum that still gives one answer - Ten halls, four blocks up to eighteen - Works fully offline