SudokuLandD ~ 6,000 original problems ~ 1.4.2 [免费版]

The best feature of SudokuLandD is that it's free and you can play with original problems!
On top of that, there are 6 difficulty levels, with 6,000 problems in total. We have organized the questions by difficulty level from the simplest to the hardest. Use it
for brain training and dementia prevention.
Even the on-screen operations of the game are simple.
GameStart: Start a game.
Continue: Continue from the last played problem.
DataClear: Erases all the results to date.
StageSelect
[<<] and [>>] change the difficulty level, while [+] and [-] change the problem.
Game
1 to 9: Enter a number in the blank. If a number is already present it will be overwritten.
GIVE UP: View the answer. Numbers in red are the mistakes. Numbers in blue are correct.
MEMO: Please use when the answer is not confirmed.
CLR: Please use when you want to erase an entered number.
QUIT: Exit the Sudoku. The numbers you have entered so far will remain.
RETRY: Erases all numbers entered so far. Timer will be reset to zero.
Please relax and enjoy.

• 04/06/2020: SudokuLandD ~ 6,000 original problems ~ 1.4.2
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