How to Play

Your goal is to use logic to fill in the numbers 1-9 in every row, column and 3 x 3 box without repeating any numbers in a row, column or box.

Rules:

Each vertical column must contain the numbers 1-9 with NO numbers repeating. Each horizontal row must contain the numbers 1-9 with NO numbers repeating. Each 3x3 square must contain the numbers 1-9 with NO numbers repeating.

Controls: Placing a number: Click or tap on a square, then select the number.

Highlight: To highlight all of a certain number on the grid, select a number without selecting a square on the grid.

Memo: Click or tap the memo button, then select a square, then select a number.