A Sudoku game with a simple interface, not only supports the standard 9th house Sudoku, but also supports 4th house, 6th house and other entry-level gameplay. The question bank with linearly increasing difficulty is presented in the form of 5 major levels and 220 minor levels, covering the difficulty of entry to competition level. The main features are as follows: 1. Intuitive teaching mode, only 30 seconds to get started 2. Step-by-step level design with linear increase in difficulty 3. From entry level to competition level difficulty, complete question bank 4. Comprehensive introduction of relevant knowledge 5. Online ranking, waiting for you to challenge 6. Challenge mode, the question bank is updated every hour. Come on PK, friends