the length of a 1-3-6 series is 3.)įirst seen odd/even Sudoku: If odd, the first odd number in the corresponding direction or, if even, the first even number. MaxAscending Sudoku: The length of the longest series of ascending digits in the corresponding direction. Higher skyscrapers block the view of lower ones, size being given by the digit. Skyscraper Sudoku: The number of visible skyscrapers from that side. Next-to-6 Sum Sudoku: The sum of all direct neighbours of the digit 6 in the row or column. Outside-2 Sudoku: Must be placed in one of the first two cells in the corresponding direction. Outside clues per variant show:ĭifference Sudoku: The difference of the first two digits in the corresponding direction. Normal 6圆 sudoku rules apply to all sudokus, so each row, column and region must contain 1-6. A circle is an outside clue for both adjacent puzzles. This is one large puzzle, consisting of six different variants of 6圆 sudokus, all linked together by circles. May not work on non sudoku grids or special constraints. This is the starting point.Hotkeys Selection Select cells + Mouse click/drag Add or remove from current selection Move selection +, + Add to current selection + Select all cells + + Deselect all cells + Invert selection, Tool sensitive selection Number Entry Insert value, pencil mark, candidate or colour Insert value, pencil mark, candidate or colour Button Insert value, pencil mark, candidate or colour Change Tool, Next mode +, Previous mode "Digit" mode ( on German keyboard layout) "Corner" mode "Centre" mode "Colour" mode + Enter digit in "centre" mode + Enter digit in "corner" mode + + Enter digit in "colour" mode Undo / Redo + Undo last action + Redo last action if it was undo Check finished puzzle Button Press the check button to test basic sudoku rules. Here is the Easy Sudoku Sample puzzle that you printed earlier (print it out now if you haven't already done so). Sudoku Instruction: #1 - Check Each Number 1 Through 9 methods explained in the next set of instructions, which covers how to solve Medium-difficulty Sudoku puzzles. NOTE: If a Sudoku puzzle labeled as "Easy" cannot quite be solved using those two techniques alone, it might be necessary to make light use of Ghosting, RC Counting, Tagging, and Line Checking. In our sample puzzle, as you will see below, we end up using each technique twice. Repeat the two techniques until the puzzle is solved. Two main techniques are used when solving an Easy Sudoku puzzle:Ĭheck for one missing number in each Row, Column, and Quadrant. After that we'll move on to the methods for solving Medium and Hard puzzles. ![]() Using our sample puzzle, I will explain how to solve Easy puzzles and finish them completely, showing the basic techniques you will use on every Sudoku puzzle. The easier the puzzle, the more numbers are provided harder puzzles start with fewer numbers provided. If it is not clear to you yet, believe me, it will be once we start the puzzle.Įvery Sudoku puzzle starts with some numbers already filled in. I will refer to Column 1 as "C1", Column 2 as "C2", and so on. I will refer to Row 1 as "R1", Row 2 as "R2", and so on. For future reference I will refer to Quadrant 1 as "Q1", Quadrant 2 as "Q2", and so on. Now let's break down what I mean by 9 Quadrants, 9 Rows, and 9 Columns. There are 9 Rows and 9 Columns.Įach Sudoku puzzle has only one solution. The puzzle has 9 large squares (I call them "Quadrants"), and inside each Quadrant are 9 little squares. I'll start with the basics in case this is your first time playing Sudoku. Grab a pencil, and print the Easy Sudoku Sample (page 1) of the Sudoku Puzzle Samples document so you can follow along and fill in the puzzle as we go. Sudoku Instructions: Solving an Easy Puzzleįirst, let me welcome you to the wonderful world of Sudoku. ![]() When you are ready to put your new skills to the test, print out some of the 100 free Sudoku puzzles on this site or play Sudoku free online. Or, work your way through all three parts to learn all Kevin's tips and strategies. This specially designed puzzle book works its way gradually to progressively harder puzzles and will encourage young solvers to continue. If you already know how to solve basic Sudoku puzzles, feel free to go straight to the Medium or Hard Sudoku instructions. Start your students and kids out on the road to sudoku mastery. The instructions have been divided into three pages on this site, based on level of skill: Easy, Medium, and Hard Sudoku. Thank you for sharing these wonderful Sudoku instructions, Kevin! ![]() As an example of his skill, Kevin is able to solve "insane" (6-star difficulty) Sudoku puzzles in 8-10 minutes. These Sudoku tricks and strategies are the methods used by Kevin Rush, an expert-level Sudoku player. Whether you are a beginner at Sudoku or an experienced player, the skills you need to solve these puzzles are described right here. Take your time to understand the examples. Want to get much better at Sudoku? Then study the explanations in this guide carefully.
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