Cage Count
Fill the grid with numbers so every row and every column holds each one exactly once. Thick outlines group the cells into cages, and each cage's numbers must make its clue: 7+ adds up to 7, 6× multiplies to 6, and 2− and 2÷ take one number from the other. Simple to learn, deeply satisfying to solve.
Every row and column once, every cage adds up. Solved by logic, never guessing.