Puzzle rules
First Sight Rooms
Place A, B, and C once in every row, column, and bold irregular room. Equal letters cannot touch, even diagonally. Outside clues show the first letter visible from that side; empty cells do not block sight.
How to solve
Complete rules
Goal: Place A, B, and C throughout the grid. Rules: - Every row, column, and bold irregular room contains A, B, and C exactly once. - Equal letters cannot touch horizontally, vertically, or diagonally. - All remaining cells stay empty. - Outside clues show the first letter visible from that direction. - Empty cells do not block sight. - Generated puzzles have one solution and use an irreducible outside-clue set: removing any displayed clue creates multiple solutions.