The first classic strategy game I would like to publish here is Sudoku or XSudoku.
In classic Sudoku, the aim is to fill a 9 × 9 grid with digits so that each column, each row and each of the nine 3 × 3 sub-grids that make up the grid contains all the digits from 1 to 9.
https://github.com/michelenatale/Games/tree/main/Strategic/Sudoku