Star Death - Singularity
Two forces. One grid. Pure logic.
A binary logic puzzle set in the cosmos. Fill every cell with a black hole (●) or white dwarf (○) following three strict rules: no three of the same type consecutive in any row or column, equal counts of each color in every row and column, and respect the edge clues between adjacent cells. With board sizes from 6×6 to 10×10 and a built-in hint system, Singularity is beautifully constrained and endlessly satisfying.
How to Play
Fill every cell
Each cell must hold either a black hole (●) or a white dwarf (○). Tap (or click) to cycle: empty → ● → ○ → empty.
No three in a row
Three or more consecutive identical pieces in any row or column are forbidden. Break them up.
Balance rows & columns
Every row and every column must contain exactly equal counts of black holes and white dwarfs.
Respect the edge clues
An = clue between two adjacent cells means they must be the same. An × clue means they must differ.