Welcome to a puzzle that adds an arithmetic twist to your Sudoku solving! This Before 9 Sudoku is a variant I created while preparing for the 2nd Round of the Sudoku Grand Prix Championship 2015. The puzzle uses a classic 9x9 grid, but the clues outside the grid are special: they indicate the sum of all the digits that appear before the number 9 in that row or column. This simple but powerful rule requires you to think about the position of the 9 and the sum of the digits that precede it.
This puzzle is my 90th contribution to the Daily Sudoku League and is one of three puzzles I created for that championship. I found this type quite interesting, and it offers a unique and satisfying challenge. It's perfect for solvers who enjoy combining arithmetic with classic Sudoku logic.
Rules of the Before 9 Sudoku
Classic Sudoku Rules apply. Additionally, the clues outside the grid show the sum of the digits that appear before 9 in the corresponding column or row.
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| Before 9 Sudoku (Daily Sudoku League #90) |
%2BSolution.PNG "Before 9 Sudoku (Daily Sudoku League #90) Solution")
Previous Daily Sudoku League Puzzle: Star Product Sudoku
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