The Times in London helped spread Sudoku to Western culture by publishing its first daily sudoku in 2004.

Tip 1: Look for rows, columns of 3×3 sections that contain 5 or more numbers. Work through the remaining empty cells, trying the numbers that have not been used. In many cases, you will find numbers that can only be placed in one position considering the other numbers that are already in its row, column, and 3×3 grid. Tip 2: Break the grid up visually into 3 columns and 3 rows. Each large column will have 3, 3×3 grids and each row will have 3, 3×3 grids. Now, look for columns or grids that have 2 of the same number. Logically, there must be a 3rd copy of the same number in the only remaining 9-cell section. Look at each of the remaining 9 positions and see if you can find the location of the missing number.Although both number puzzles share a lot of similarities, there’s also a major difference – amount of arithmetics involved. Killer Sudoku is one of the hottest logic puzzles these days. Even though the word “killer” in its name implies some sort of insane difficulty, don’t let it scare you off. In many cases Killer Sudoku is much easier and more fun to play than its fellow puzzle – the classic Sudoku. This makes easy Killer Sudoku puzzles an incredible fit for beginners. In addition, there is a “double” tactic. This tactic is characterized by the fact that in a row, column, or in a small square, you can still place only two possible numbers. But you do not know which one to put. The idea is that you make a mark about it and exclude it from further decision. This reduces the number of options to solve, and it becomes easier to solve the puzzle. The same can be done for three digits. This tactic is called a “triplet” or “triple”. Pros of playing hard web Sudoku puzzles Although solving Killer Sudoku online seems a bit harder than classic sudoku, we made it accessible for players of all skill levels. This number puzzle comes with several difficulty levels – easy, medium, hard, and expert. This way, the number puzzles are great for both beginners and advanced Sudoku solvers. Daily Killer Sudoku practice makes perfect and we have no doubts you’ll become a master in no time! The best Killer Sudoku tactic

What is Sudoku? 'Su' in Japanese means numbers while 'Doku' means single. Sudoku means single numbers. Therefore, in the sudoku game, we have to fill in numbers without repetition. Did you know? Sudoku isn’t actually a Japanese puzzles at all. It was invented by an American. Howard Garns created the free puzzle as Number Place in 1979 but died in 1989 before Japanese publisher Nikoli got a hold of it. The game didn’t really take off until 2004 though, when Wayne Gould convinced The Times in London to publish it. Sudoku is a brain challenging number puzzle, played on a 9x9 board. Those who have ever heard about Sudoku usually know the rules. They are quite simple. A player should enter numbers into the blank spaces so that each row, column, and a 3x3 section contain the numbers from 1 to 9 once. It is better to start solving Daily Sudoku with the fragment that is already filled with many numbers. This will make it easier to add the missing ones late on. Also, remember that every Sudoku has only one unique solution.This solver offers a number of features to help you improve your solving skills and practice solving strategies. Solve Features Killer Sudoku is a fun twist on the classic sudoku for those of you seeking something new and challenging. It’s also known by such names as sumdoku, addoku and sumoku puzzle but in a nutshell it’s pretty much the same number puzzle. What’s the difference between Sudoku and Killer Sudoku?