Killer Sudoku - Sudoku meets arithmetic. Cages with sum targets add a new layer of logic to the classic puzzle.

Sudoku X - Classic Sudoku with a diagonal twist. Both main diagonals must also contain 1–9 — a simple rule that changes everything.

Greater Than Sudoku - Latin square puzzles with inequality constraints. Use greater-than and less-than signs to deduce each cell. Multiple grid sizes from 5×5 to 9×9.

Cross Sum Puzzles - The number crossword. Fill the grid so each run of cells sums to its clue with no repeated digits. A Japanese classic.

Cage Puzzles - Combine numbers using addition, subtraction, multiplication, and division to satisfy each cage.

Sandwich Sudoku - Find the filling between the bread. The sum of digits sandwiched between the 1 and 9 in each row and column must match the clue. A delicious twist on classic Sudoku.

Jigsaw Sudoku - Irregular regions replace the boxes. Same rows and columns, but the 3×3 boxes are replaced with irregular jigsaw-shaped regions — every puzzle is a unique shape.

Hyper Sudoku - Four bonus regions raise the stakes. Four extra shaded regions must also contain 1–9, adding a new dimension of constraint to classic Sudoku.

Mini Sudoku - Perfect for kids and beginners. Smaller 4×4 and 6×6 grids make this the ideal introduction to Sudoku logic. Kid-safe and family-friendly.

Match & Clear - Fast-paced number fun. Tap groups of matching adjacent numbers to clear the board before time runs out. A casual puzzle for quick sessions.

Skyscraper Sudoku - A number grid puzzle with a view. Use height clues around the edges to deduce the skyline and fill every row and column.