Solve puzzles with varying difficulty levels. Input numbers manually or transfer from newspapers. Use pencil and paper style tools for notes and hints. Track possible numbers with a ball of string. Access expert-level hints like Swordfish.
Solve puzzles with multiple difficulty levels. Fill a 9x9 grid with numbers 1-9. Use notes to mark possible numbers in empty cells. Track progress through different challenges.
Solve logic puzzles by filling grids based on numerical clues. Determine which cells to color to reveal hidden images. Track progress and restart puzzles. Share completed puzzles with others.
Play puzzle with varying difficulty levels and multiple types. Save progress, undo moves, restart levels, and use hints. Access a variety of brain-training challenges for spare .
Solve puzzles by filling a grid with zeros and ones. Ensure each row and column has equal numbers of each. Avoid three identical numbers in a row or column. Complete puzzles with pre-filled starting cells.
Solve logic puzzles by painting squares and filling regions to reveal pixel-art images. Use clues from rows and columns to determine which squares to color. Complete grids to uncover hidden pictures.