Blindfold Sudoku was the second audio game – after Blindfold Racer – that I built. It was launched more than three years ago, and I haven’t improved it since then. It was clearly showing its age when people wrote to me complaining how the game is too hard to play, and the puzzles are too difficult to solve.
The few who did play it wanted more puzzles; they had solved the original 50 puzzles included in Blindfold Sudoku. Since I couldn’t find any puzzle vendor to sell me Sudoku puzzles at an affordable price, I didn’t bother improve the game.
Then, about a month ago, I was searching on some open-source websites, and found a Sudoku puzzle generator. I also heard from two Sudoku aficionados that the Sudoku games they previously played on the App Store were no longer accessible after iOS 11 came out. Finally, I was motivated to improve the game.
I re-progammed Blindfold Sudoku to incorporate the Blindfold Games common interface, such as its menu, settings and help screens. Next, I generated thousands of puzzles – varying from very easy to easy to medium to difficult – and made them available in the game.
I added several features to the game to speed it up and added a gesture to tell you how many cells you’ve gotten wrong. When a sighted person plays the game, they focus their efforts on the rows, columns and squares are close to completion by looking at the Sudoku grid. To match that, you can now swipe left with 3 fingers to hear which row, column and square are almost complete.
The game testers told me that the improvements made the game more enjoyable and they can solve even the difficult puzzles. You can download Blindfold Sudoku here: