Solve - puzzles by filling grids with numbers that match horizontal and vertical equations. Adjust difficulty levels and track progress. Share completed puzzles with friends.
Solve logic-based puzzles by deducing ship positions on a 10x10 grid. Use numerical clues to identify hidden fleet placements. Play single-player without math skills. Track progress and replay puzzles.
Solve puzzles with 1,000 unique handcrafted puzzles across four skill levels. Choose from standard, symmetrical, and patterned styles. Adjust color schemes. View incorrect answers in red. Track times.
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 additional numbers outside the grid indicating the sum of cells between 1 and 9 in each row and column. Complete puzzles with varying difficulty levels. Track progress and view hints when needed.