Below ALSs with double bond. ALS marked in green color (numbers 2, 3, 4, 6, 7 and 9). ALS marked in yellow color (numbers 2, 3, 6, 8 and 9). The green and yellow ALSs have the numbers “9” and “6” as RCC in common, which allows for the exclusions in red.
Below new ALSs marked in green and yellow, with the number “5” as RCC, allowing deletion in red.
Below are two ALSs in green and yellow, with the number “9” as RCC. The number “6” in cell H1 sees everyone in both sets and can be deleted.
Below, two ALSs (green and yellow) with the number “6” as RCC. With this the number “9” in cell H6 can be excluded, as it sees everyone in both ALSs.
Pointing Pairs. The number “9” only exists in box 8 on line G, which allows for the deletion below.
Below, two ALSs in green and blue with the number “5” as RCC. With this the number “3” in cell G2 can be excluded, as it sees everyone in both ALSs.
Below two ALSs in blue and brown colors, with the number “2” as RCC, allowing the exclusion below.
Below 2 ALSs in blue and yellow colors, with the number “9” as RCC, allowing the exclusion below.
Forcing Chain in cell H2, that is, testing the numbers “2”, “3” and “6” as a sudoku solution.
Choosing the number “2” forces cells A6 and F6 to have the number “2” in the same column 6 as a solution. This number can be deleted from cell H2. Test, depending on the choice of deletion, the mismatch will occur in other cells. The choice of the other two numbers did not present common candidates for exclusion or solution in any cell.
Now testing the possibilities in the bi-value cells H2 and H7, that is (6.3) – (3.9) and (6.9).
The solution H2=6 and H7=3 has two numbers “9” in line E as a solution. And the solution H2=6 and H7 = 9 leads to the absence of the number “8” in column 7 (incompatibilities may appear in another place, as exclusions are made). With this, the solution for cell H2 will be the number “3” and for cell H7 the number “9”.
With this there will be the following exclusions:
Two ALSs in yellow and blue colors, with the number “5” as the RCC allowing the exclusion below (it could be the numbers “3” and “5” double RCC, with the same exclusion occurring).
Cells G2 and G7 allow for the following combination of results (left table). When testing the combination G2 = “2” and G7 = “3” the sudoku is solved with simple techniques (try it).
