nr. 951 - Daily League Sudoku -Tight Fit Killer Sudoku

This sudoku is the combination of Tight Fit Sudoku and Killer Sudoku.
All rules of these two genre are valid. Namely:

• Fill in the grid with digits from 1 to 9, so that each row, column and bolded-line region contains each digit exactly one.
• Each single cell contains exactly one digit, and each cells that divided by a line contains 2 digits; in these cells the smaller number must go above the larger number.
•  The digits within a dotted-line sub-region must be all different.
• The given numbers indicate the sum of digits in the corresponding sub-region.

I hope you will enjoy this funny hybrid sudoku.