Solve placement with 2 rules: each row, column, and region has exactly 2 stars; no stars can touch, including diagonally. Track progress and access from KrazyDad, featured in the New York Times.
Play with three different challenges. Solve Sudoku by filling cells without repeating numbers. Connect dots in Water Flows to create full pipe paths. Move blocks in Move Blocks to reach the exit with movement restrictions.
Solve problems and puzzles to progress through worlds and unlock character levels. Practice arithmetic and problem-solving skills. Track progress and compete against other players.
Learn through interactive puzzles and levels. Practice basic operations with over 6000 exercises. Track progress and develop problem-solving skills. Challenge yourself with increasing difficulty.
Play by filling a 9x9 grid with numbers so each row, column, and 3x3 box contains 1-9 without repetition. Solve puzzles with varying difficulty levels. Track progress and complete daily challenges.
