Stuck on a Mathdoku (a.k.a Calcudoku, KenKen®) puzzle in The Times? This app can help you get unstuck by taking you through the solution steps!

- Supports 4x4, 5x5, 6x6, 7x7, 8x8 and 9x9 puzzles;
- Features a quick and easy method for entering new puzzles onto a blank grid;
- Once the puzzle is entered, you can choose to reveal the full solution, or you can tap on the grid to reveal only the squares you want as 'hints', or…
- Try 'walkthrough' mode, which shows you a possible step-by-step solution to the puzzle. If you're really stumped and don't know how to proceed, this will help you figure out that one logical step you were missing!

Other features:
- Puzzles can be saved and loaded for future reference;
- The solver reports an approximate difficulty rating for each puzzle, based on the algorithms that were required to solve it;
- 'Small numbers' (the remaining potential options for each square) can be turned on or off at leisure while viewing the walkthrough steps. They provide a lot of extra information.

This app will help you hone your Mathdoku strategy, and provide as much assistance as you need to help you solve tricky puzzles. Please enjoy, please rate, and contact support@sudoseng.com if you have any questions.