Those are tough to find! Also, sometimes the 2-2-2 type Swordfish can be really tricky to find in a puzzle. Especially when there's a 2-2-2-2 Naked Quad wrapping a 2-2-2 Hidden Triple. My record on this level one minute 58 seconds. With "Hard" level on Andoku 3 you need to be an expert in X-Chains, Naked Quads, XY-Wings, and Swordfish. Hodoku considers a Sashimi X-Wing as "Hard" which most other sources would consider it as "Extreme."ĪIC Nice Loops and XY-Chains make it extreme. And Hodoku's hard level puzzles would be classified as extreme in other sources. Many people would characterized Hodoku's medium puzzles as hard puzzles. For example, on Hodoku, medium puzzles can require hidden pairs and hidden triples. What defines a puzzle's difficulty level are the puzzling solving techniques needed to solve it. I think labeling a puzzle's difficulty level is completely the wrong approach. So you can learn the techniques and logic by numerous examples.What is considered easy, medium, hard, and extreme is not consistent. If you launch our smart Sudoku solver by clicking this link: smart Sudoku solver, it will solve a random Sudoku puzzle of a chosen difficulty level from our database. It will bring up our smart Sudoku solver to solve your Sudoku puzzle step by step. You can use our online Sudoku solver to enter your own Sudoku puzzle and then click the "Step by Step Solution" button. Our smart Sudoku solver can solve any valid Sudoku puzzles step by step and explains the logic in detail for each step so that you can learn the Sudoku solving techniques by numerous examples. Most people are familiar with the basic rules of sudoku, but just in case you are new to the game, here is a brief run down: Each of the columns and rows must contain one and only one example of a given digit. Learning Sudoku Solving Techniques by Examples Enjoy a little brain exercise with our free collection of printable sudokus.
Easy Medium Hard Evil Sign up for free Log in to Web Sudoku: Hide the advertisement below. The other option is to bring up our smart Sudoku solver to solve your puzzle step by step with explanations. To complete the Sudoku puzzle, enter numbers into the spaces so that each row, column and 3×3 box contains the digits 1 to 9 without repeats. One option is to give the solution of your puzzle instantly. Our online Sudoku solver offers two options to solve your Sudoku puzzles.
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Our Daily Sudoku page offers a new Sudoku puzzle for each difficulty level every day. You can use our interface to enter candidates in a cell, highlight a cell that you want to make a note, trace and retrace steps with undo/redo buttons, fill in candidates for all empty cells with one key, save an unfinished puzzle in the middle of the game, check mistakes or violations for your entries, and more (see the manual of our interface for all features). But our interface makes it more convenient for you to apply the logic and trace the steps. You still need to solve the puzzles with your own. The interface here has many features that can help you to solve the puzzles. Also the expert area provides extremely difficult Sudoku puzzles for those who are familiar with the most advanced Sudoku solving techniques. The chance that you play the same Sudoku puzzle is almost zero. Play Sudoku Onlineīillions of free Sudoku puzzles of varying difficulty levels are offered here online. The objective is to fill the 9x9 Sudoku grid with digits from 1 to 9 such that each of these 9 digits appears in each row, each column and each 3x3 block once and only once.