Let's Make Number Place (Elementary course)
Let's Make Number Place : Step 9
15. Sorting out the undecided cells.
Looking at the row with the dotted line, the possibility for a 6 is only in the marked cell.
A 5 had two possibilities in the centermost block, but now that a 6 filled one of the cell, the 5 goes to the other one. Therefore, a 5 is fixed at the bottom center block, as well.
Then cells S, T, U, V and W are fixed automatically in this order.
According to the 2 in the middle left block, cell X becomes 2, and the cell Y becomes 8, the last number in its column.
The marked exposed cell is fixed as 9, according to the 9 in the top right block.
