Feng Qingyang glanced at Bai Susu and nodded, "Permission granted." Bai Susu immediately stood up and walked over to Zhao Sheng.
Then, without looking sideways, she bypassed him and approached the box made of red sandalwood.
This so-called Digital Mechanism Lock is actually, in modern terms, a standard nine-grid Sudoku game.
While Zhao Sheng and the others were solving the puzzle, their thinking was likely limited to the idea that the sum of numbers in rows and columns should be the same, so no matter what they did, there would always be a column with a different sum.
However, according to the hints in the original text, this Sudoku game is actually a variant Sudoku, specifically a diagonal Sudoku.
A diagonal Sudoku means that the numbers in each small nine-grid can't be repeated, and each row, column, and major diagonal line must also have unique numbers.
Once this rule is understood, the Digital Mechanism Lock naturally becomes much easier to solve.
