Year 8: Sudoku

What is Sudoku?

Sudoku is a logic puzzle! The goal is to fill a 9x9 grid with numbers 1 to 9, so that each number appears only once in each row, column, and 3x3 block.

How to Play

• Start with a partially filled grid.
• Use logic and deduction to figure out which numbers can go in each empty square.
• Each row must contain the numbers 1 to 9, without repetition.
• Each column must contain the numbers 1 to 9, without repetition.
• Each of the nine 3x3 blocks must contain the numbers 1 to 9, without repetition.

Tips & Tricks

• Look for numbers that can only go in one possible square in a row, column, or block.
• If a number already exists in a row or column, you can eliminate it as a possibility from that row or column.
• Focus on the blocks! If a number is missing from a block, you know which numbers *can't* be in that block.
• Sometimes, you'll need to make an assumption and see if it leads to a solution.