| This step is a bit more complicated. The logic to solve this step would demonstrate to you why the sudoku game has become so popular and why so many people play sudoku on a daily basis. Let’s look at the top right box (where ABC cross PQR). We can’t put 7s in rows A and C because there are 7s in cells AL and CN, respectively. We can’t put a 7 in cell BP because there’s a 7 in cell HP on the same column.
The only available cells are therefore BQ & BR.
Let’s look at the right middle box (where DEF cross PQR). We know with certainty that the number 7 must be in either cell DQ or EQ – we can’t put 7s in column P or row F, because there are 7s in cells HP and FM, respectively.
Now, let’s explore the two available cells once again: We now know that the number 7 can’t be in cell BQ because we determined in our previous sudoku logic that it must be in either cell DQ or EQ on the same column. The only available cell is therefore cell BR. |
