You don’t find where a number can go — you find where it cannot go. For any empty cell, ask: Which numbers are already in its row, column, and box? The remaining digits are candidates.
Empty grid. Place given numbers.
The digit in Column 9 tells you which column the number 9 is in for that row. sudoku 129 better
Before diving into advanced techniques, let's quickly review the basic rules of Sudoku:
"Sudoku 129 Better" appears to be a short, punchy phrase—likely a title for a Sudoku puzzle variant, a particular puzzle labeled #129, or a slogan urging improvement at Sudoku. Below I present three concise interpretations with a short write-up for each so you can pick the one that fits your intent. You don’t find where a number can go
Scan rows 1–9. Row 3 missing only ‘6’? Place it.
If the pivot cell is in the same row or box as Wing A, and the same column or box as Wing B, then any cell that sees both Wing A and Wing B cannot contain candidate Z. Empty grid
: Harder puzzles may require methods like discontinuous loops or the 3-number rule (identifying three cells in a row/block that can only contain the same three specific numbers). Sudoku vs. Other Brain Games