Here we will use the above strategies to solve a puzzle. 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 rules naked pair, hidden pair in row, hidden pair in column, and. The third is to consider the total value of a region. Other rules in the example reduce the permissible values for some cells. 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. More advanced example based on weekly 183 Killer Sudoku Solving Strategies.A daily (#1271) is easier than it looks.More advanced example based on weekly 74.More advanced example based on weekly 28.More advanced example based on weekly 24.That is why one must first scan before analyzing. *note: Candidate elimination is note the fastest nor easiest method for for finding the green cells answer. Candidate elimination can also be used with three number in three cells. This means 3 is in the top cell(marked green) and 9 is in the 'middle' cell. We can see that 3 can not be in the 'middle' open cell. ![]() There is two other blank cells in this column and the missing numbers is 9 and 3. The two cells which 7 and 8 can be in is in the same column, thus it cannot be elsewhere in the column. I have concluded(with the help of cross hatching) that 7 and 8 can only be in two places in the lower left region(i filled both in). the method for candidate elimination I'm showing now is the matched pair method.This method happens when a pair of numbers are the only possible answer to two cells. It's slow progress and i don't like to erase that much. I will not be showing the what if to you because i don't like it. ![]() Analysis consists of two methods namely candidate elimination and the what if.
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