Sudoku 129 Official

– Around move 25–30, a pointing pair of 3s in box 2 will eliminate a 3 from another row in box 1. Similarly, a line-box interaction with 5s helps resolve column 9.

The differences between . How to build your own valid Sudoku grid. Sudoku Solving Ability and Intelligence sudoku 129

: Keeping track of multiple candidates across the board strengthens short-term recall. – Around move 25–30, a pointing pair of