Constellation

Constellation is a browser puzzle by Solomon Dev Studios, a take on the logic puzzle known as hashiwokakero, or bridges. The board is a dark sky with numbered stars. Each number says how many light bridges must touch that star.

Bridges run straight up, down, left or right, never cross each other, and at most two can join any pair of stars. You drag from one star to another to build a bridge, drag again to double it, and once more to clear it. The puzzle is solved when every star has exactly its number and the whole constellation is one connected network.

The developer says every board is generated and then checked by a solver that only makes forced deductions; any board it cannot finish by logic alone is thrown away, so you never have to guess. There are three sizes: small (7x7 with 9 stars), medium (9x9 with 14) and large (11x11 with 20). The Daily button builds a board from the UTC date in the size you have selected, so players on the same size share the same puzzle, and solving it on consecutive days builds a streak. New Puzzle gives unlimited random boards.

The game is a single HTML file that works offline once loaded and can be installed. It has undo, hints, keyboard controls, an option to dim finished stars and a warning for over-linked stars. It suits players who like quiet number-logic puzzles with no guessing.