Still Pond — Conway's Game of Life still-life fill puzzle: tap each blank cell to flip it between empty and filled, and configure the grid so the resulting configuration is a still-life (applying GoL rules one step produces the same grid). 30 unique-solution levels across 5 tiers from 4x4 Beginner to 7x7 Expert.
STILL POND
Conway's Game of Life · Still-Life Fill
Build a Still-Life
Each puzzle shows a grid with some cells already live (yellow) or empty (gray). Tap any blank cell to flip between empty and filled. Your goal: make the entire grid a still-life — a configuration that, after one GoL step, looks exactly the same.
•GoL rule: Live cells with 2 or 3 live neighbors survive. Dead cells with exactly 3 live neighbors are born. Everything else dies.
•Goal: A still-life is a grid where applying GoL once produces the same grid.
•Tip: Look for blocks (2×2 filled squares), tubs (4 cells in a + shape), and ponds (8 cells in a hollow 4×4).