SudokuX is a puzzle derived from Sudoku. To solve it, no knowledge of mathematics is necessary and all mysudoku.io puzzles can be solved without having to test several solutions manually (it is possible to solve all the difficulties of all the puzzles without backtracking).

The goal of the game is to fill the game grid with numbers from 1 to 9 so that each row, column and sub-grid of 3x3 cells contain each number only once. The difference with the classical Sudoku is that the large diagonals (colored cells in our puzzle) can only contain each number once as well. The game starts with a partially filled grid and your task is to fill in the remaining cells. Here are the rules:

• a row can only contain each number once
• a column can only contain each number once
• a sub-grid of 3x3 cells can only contain each number once
• a large diagonal can only contain each number once

Skyscrapers game

The skyscraper game is a puzzle derived from Sudoku. Each grid is composed of NxN cells and on the side of this grid are clues. The goal of the game is to place a skyscraper in each cell. Each skyscraper has a height between 1 and N and the big skyscrapers hide the smaller ones placed behind them. Each row and column can contain only one of each number. The clues give the number of skyscrapers visible from their positions. To access them, click here.

Sudoku

Mythical game of Japanese origin, the goal of Sudoku is to fill a grid of numbers between 1 and 9. The difficulty comes from the fact that each row, column and sub-grid of 3x3 cells can contain each number only once. To access it, click here.