9+8=17 Sudoku Puzzle (Fun With Sudoku #34)

This puzzle carries a name with history — 9+8=17 Sudoku, the 34th entry in our Fun With Sudoku Series, was originally created for Team India's practice ahead of the 2nd World Sudoku Championship 2007 in Prague. That event introduced solvers worldwide to dozens of new Sudoku variations, and puzzles like this one were built specifically to prepare for that level of competition.

Over the years, similar puzzle types have appeared under different names, but we've kept the original title intact since that's how it was first known. Fun With Puzzles continues to showcase Sudoku variants alongside Classic Sudoku and Mini Sudoku, giving solvers plenty of ways to test their logic. If arithmetic-based Sudoku variants interest you, this puzzle is a fantastic addition to your solving list.

Rules of the 9+8=17 Sudoku

Classic Sudoku Rules apply. Additionally, small clue numbers are either placed on the border lines between selected pairs of neighboring squares of the grid or placed after slash marks on the intersections of border lines between two diagonally adjacent squares. Each small clue number is the sum of two digits in the two squares that are horizontally, vertically, or diagonally adjacent to each other. The position of each pair of diagonally adjacent squares is indicated by either two forward slash marks // or two backward slash marks \\.