![]() ![]() Read off the three 3 bonus numbers and use your coloured number disks to put them on the plastic board. You will see the top row of 3X3 mini-grids. Put the filter window over the top third of the EASY grid on the puzzle card. If play is slowing down or stalling, either player can forego a turn to "buy" a row of these extra numbers. On the EASY set-up grid there is one extra obscured number in each 3X3 "mini-grid" of the board. If one player is much better than the other, put the MEDIUM set-up numbers on the plastic board, then pass the card to the less experienced player who can use the additional numbers in the EASY set-up grid without showing them to their opponent. ![]() Use the green number disks to put the starter numbers from the card into the corresponding spots in the board.įold up the cardboard filter sleeve (the cut and creased card with the long narrow slot in it) then slip the red filter into it. Place all 81 double sided (blue and red backed) number disks on the table by the board along with the timer. If it is the MEDIUM, slide the EASY half of the card under the side of the board to hide the extra numbers. Lay out the plastic board and select a single card from the pack on which you will see the set-up grid of numbers to start the game.ĭecide if you are going to use the EASY or MEDIUM set-up. This game is a fun way to enjoy Sudoku with a friend - good luck and good Sudoku-ing! SETTING UP If you use this game board and its disks as a "large print" way of solving Sudoku puzzles from my book, you CAN write number notes on the white board in HB pencil then rub them off with a rubber after each game. These rules do give a very brief outline of what you are meant to do with Sudoku puzzles, but they are not meant to be an in-depth lesson. You will also know how to play Sudoku - and hopefully, be pretty good at it by now. If you have read my book, "How to do Sudoku" (Ebury Press) you will know all about how I became an addict. Here we will use the above strategies to solve a puzzle.I am Carol Vorderman and I admit I have a Sudoku "habit". The sumĬalculator found in the online player page canĪpplying the basic strategies. Has a total of 3, 4, 16, or 17 there is only one combination of values Many ways of reducing the number of sums. Making a sum, can often lead to a potential solution. Reducing the number of different possible ways of Sum Elimination This strategy examines the different possible ways of making the Possible values, then no other cell in that region can contain any of If there are kĬells contained entirely in a region that contain exactly k different Rule of K The Rule-of-k is an extension of the Rule-of-1. If S is the sum of all the cages containedĮntirely in a region, then the cells not covered must Thus, each sudoku region has a total value Rule of 45 Each sudoku region (i.e., row, column, or nonet) contains theĭigits one through nine. Thus, if all the digitsīut one appear in a row, the missing digit must appear in the empty In the former case, each region must containĪll the digits one to nine. ![]() Rule of Necessity This rule can be applied to sudoku regions (i.e., row, column, or Likewise, each digitĬan appear in a cage only once. Row, it cannot be in any other cell in the row. In a sudoku region each digit appearsĮxactly once. No region canĬontain any duplicate digits. Rule of 1 This comes directly from the definition of sudoku. The following are the basic rules used to solve killer sudokus. (The Terminology used on this page is defined on the rules page.) At a later date we will post more complex We outline the basic strategies and then show how they are applied inĪ sample puzzle. The third is to consider the total value of a region. The second is to consider the different ways that a sum can beĬreated. The first is to use the strategies for solving regular sudoku puzzles. There are three basic methods used to solving killer sudoku puzzles.
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