WPF Sudoku GP8 - open until Saturday + incorrect instructions

Dear players, the IB for Sudoku R8 is now available here: https://gp.worldpuzzle.org/content/instruction-booklet

We apologize for the delay. The competition will remain open for two more days - until Saturday (August 2) midnight (GMT + 2 hours).

EDIT: The instructions for Arrow Sudoku (no. 7) are wrong. It´s a standard puzzle with the usual wording: Apply classic sudoku rules. The number placed in a cell with a circle must be the sum of the numbers placed in cells the adjoining arrow passes through. Numbers may repeat on arrows.

Good luck!