![]() ![]() Press the "P" key to toggle between Pen and Pencil or use the mouse wheel.Press the space or Delete key to remove any numbers from the highlighted cell.Use the number keys to enter a number in the highlighted cell.Use the arrow keys to navigate around the grid.If you prefer to use the keyboard rather than the mouse, you may: You can also switch between pen and pencil modes quickly by pressing the "P" key or by using the mouse wheel. To change back to "Pen" mode, click the "Pen" icon.You may enter as many pencil marks as you like in each cell.To do this, click the "Pencil" icon to be placed in "Pencil mode". If you're not 100% sure of a number, you can make a note of it in the cell using the Pencil.Fill in blanks with the Pen (select a cell, then click on the number you want to enter).Click the "Menu" button, then select the "New Puzzle" menu item and select a difficulty level from the dropdown menu.Each cage indicates the total that it's cell values sum to.įor example, in the puzzle to the right, the cage shaded green has cells totalling 19.Īlso, the cells in each cage must be unique even if they are not in the same row, column or block. It differs in that it introduces "cages" - groups of adjacent 2, 3, 4, or 5 cellsĭemarcated by dotted lines. No number may appear more than once in any row, column, or block. Killer Sudoku follows the same rules as regular Sudoku in that each row, column and block must contain ![]()
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