Sudoku 129 [repack]

If a number in a 3x3 box can only appear in one row, that number cannot be in that same row elsewhere in the grid. Popularity of Mini Sudoku 129 on LinkedIn

The 9x9 grid is further divided into 9 smaller 3x3 sub-grids, often outlined with thicker borders. sudoku 129

: You use memory to track strategies and candidate numbers. If a number in a 3x3 box can