< Back

Last Remaining Number

Find the cell where only one number can go, because all other numbers already exist in the row, column, or block.

  1. Have a look at this block. Do you see the cell that contains the last remaining number?
Sudoku grid before applying the Last Remaining Number technique
  1. To find the cell that contains the last remaining number, you should take a look at the numbers that already exist in the row, column, and block.
Identifying the last remaining number for a given cell
  1. We can see that numbers 1, 2, 3, 4, 6, 7, 8, and 9 are already taken. So the last remaining number is 5.
Result after applying the last remaining number technique

< Last Free Cell

Last Possible Cell>