Any incorrect letter will be highlighted in the Alphabet Key in a contrasting shade. In With Hints mode, when a letter is entered correctly in a cell or cells in the grid, it will be highlighted in the Alphabet Key in the same shade as the given letters. That letter will also appear in every other cell in the grid with the same number. Given letters are highlighted.Ĭlick in a cell to highlight it then, in the Alphabet Key, click on the letter you think should go in the highlighted cell.
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If a letter is not used in that Code Cracker puzzle, it will also not appear in the Alphabet Key. Or use the Alphabet Key to remove the letter in the selected cell.Īlphabet Key: The Alphabet Key to the right of the Code Cracker grid shows the available letters for the puzzle. Or click on the letter and type another one over it. If you are, click on Hint to show the Hint menu and select Reveal.Īs you correctly complete the Code Cracker, the solution cells above the grid will reveal the mystery answer.ĭeleting or changing letters: Click on the letter then use the Backspace key. Just want a quick look at the whole solution? Again, you’ll have to be playing in With Hints mode.
The correct letter will be inserted in the cell you selected and in every other cell in the grid with the same number. Then click on Hint to show the Hint menu and click on Letter. If you are, click inside the numbered cell that you would like revealed. Need a hint? You’ll need to be playing in With Hints mode. In With Hints mode, the correct letters in the Alphabet Key are highlighted in the same shade as the given letters.
Click in a cell to highlight it then, in the Alphabet Key, click on the letter you think should go in the highlighted cell. Your time will be displayed when you finish the Addoku.You can type the letter into the cell or select it from the Alphabet Key on the right. If you don’t like working against time just click on Hide Timer in the top right menu. The timer starts as soon as you open the Killer Sudoku. If playing in quick mode, there is visual feedback which highlights numbers in red if they are incorrect. If the shaded sets fill a row, column or block with just one number protruding into another row, column or block, then that number will be the total of the shaded squares minus 45.Īlways remember the basic Sudoku rules that no numeral 1-9 can be repeated in any row, column, 3×3 block or set of numbers – you’ll soon unravel the Killer Sudoku! It is also useful to remember that the numbers in each row, column and 3×3 block add up to 45. Eventually patterns will emerge as you eliminate possibilities. Then do the same with three and four digit sets.
You can type these possible numbers in each square. 17 can only be 9 & 8 but 8 could be 1 & 7, 2 & 6 or 3 & 5 so it can’t be 4 & 4 because each row, column, block and set can contain only one of each number. For example, the total 3 can only be 1 & 2. Then look for two-digit sets and work out the possible combinations. Single digits can be filled in straight away. Use the mouse or arrow keys to select cells within the grid and then enter a number by pressing the corresponding key or using the on-screen keypad. Use these totals to find the right numbers to solve the puzzle. No number is repeated in any of these sets. The numbers that occur in the squares linked by a shaded line add up to the total given in the top left-hand corner of each set. The difference is that you are not given numbers to start you off. The Killer Sudoku / Addoku is like a traditional Sudoku in that every row, column and 3×3 block must contain the numerals 1-9.
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