16 Char Sudoku playing rule

Unique definition and game rules:
1 Circled numbers (plus sign), this grid is a non-couple number, the upper and lower grids in the same column, and the left and right grids in the same row all have 2 pairs of couple numbers in the upper and lower (left and right) two palaces (cross or T-shaped structure, a total of five nine palaces) in the same row (column). Add up all the pairs in the same row, and there are also three pairs in the same column.
2 Strikethrough numbers (minus sign), the other two numbers on the left (right) of the same row are called row couple numbers, and there are also a pair of couple numbers in the left (right) two palaces in the same row, and there are a total of three pairs.
3 Underlined numbers, the other two numbers on the upper (lower) of the same column are called column couple numbers, and there are also a pair of couple numbers in the upper (lower) two palaces in the same column, and there are a total of three pairs.
4 Ordinary numbers, without additional marks, do not belong to the numbers defined and described in 1, 2, 3. Belong to "couple numbers". 11/20

|9+7|  _ -| -   |
  |      -|      -|2+_|
|    +|+   5|  -    |
  |7-+|_6 _|3 +  |
  |    3 |  + | - |
|+     | 3-|-    2|
  |39+|     - |     +|
  |   -   |      1|⑧4  |
_|     | +|-    3|