Hi, I think Frame 112 cannot be solved
For Frame 112, the first column in the first box says 6, so the squares must be 1, 2 or 3.
The first row for the first box says 20 so the 3 must go into the box 1,1.
so the other two boxes on the first row, first box, must be 8 or 9
the 3rd column of the first box is 11 so the number there can't be 9, it's 8.
But 8 + 1 + 2 = 11, but 1 and 2 are already in use in the first box's first column