The WSC 2016 is over. I have a lot of puzzles left to solve, but I’m quite happy with my result (54th in the general ranking, after the 39th official participant, after 89/63 last year). Here’s a puzzle I made to help Martin to prepare to become the King of the Mountains (not sure that helped, considering I didn’t quite have the rules right). Test-solved by the new world champion Tiit Vunk of Estonia. Congratulations to both!

Rules Fill the cells with numbers 1 to 9, so that no number repeats in a row, column or outlined 3×3 square. Whenever a number is equal to the sum of some numbers in a diagonal direction, an arrow is placed pointing there.

(The standard rules also have arrows pointing horizontally and vertically.)