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 puzzles on a 9x9 grid with pre-filled numbers. Fill the grid without repeating numbers in rows, columns, or 3x3 quadrants. Available without internet connection. No ads.
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.
