Every day a new Kakuro puzzle in 4 difficulty levels. Also with an archive of several months. Solve according to the kakuro rules: the numbers (1-9) entered need to add up to the corresponding clue.
Everyday 4 new Sudoku puzzles and an archive of a month. Solve the puzzles using the Sudoku rules. Every number of 1-9 can only occur once in every row, column and 9x9 box.
Every day a new Sudoku in 4 difficulty levels. Also with an archive of several months. Solve according to the sudoku rules: a number (from 1-9) can only be used once in every row, column or 3x3 box.