Multiple interactions strategy for solving sudoku
Advanced strategies
Multiple lines, blocks and columns interactions
This technique is based on the same reasoning as the simple interaction, but this time, we will deduce from the line or the column from a candidate in a block starting from his position in the lines or columns from the aligned blocks.
Example
Example of multiple interactions.
The interaction relates to the 3.
While looking of close the last line, we notice that the 3 is not present in the block of left nor in that of right-hand side.
It is thus in the second block. We must eliminate the 3 in the other boxes from this block.
Strategies list
Elimination of candidates by interaction in the same area
Elimination of candidates by interaction in several areas
Elimination of candidates by interaction in all the puzzle
[ Up ]