About Quackle
Quackle is a 7×7 grid split into five to seven irregularly-shaped ponds. Each pond prints a flock-size — the exact number of ducks it should hold — and two rules govern every placement: inside a pond, the ducks form a single connected flock; at a pond border, no two ducks from different ponds may sit side by side.
Read the full Quackle rules for what the Check messages mean, or browse past Quackles — every puzzle stays open for replay. Like Quackle? Try Sumrex, another grid where Check tells you which rule failed without naming the cell.