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Su Doku: February 14, 2006

To ensure grids print out on one sheet of paper, place cursor over image, right click for options window, select “print”

Fill the grid so that every column, every row and every 3x3 box contains the digits 1 to 9.

Tips and computer programme at www.sudoku.com

The Times Samurai Su Doku Calendar 2006

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The Times First Edition Su Doku Board Puzzle is available at just £19.99 (p&p free). Call Times Books First on 0870 1608080.

HOW TO PLAY KILLER SU DOKU

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Fill the grid so that every column, every row and every 3x3 box contains the digits 1 to 9.

The digits within the cells joined by dotted lines add up to the printed top left-hand figure.

Within each dotted-line “shape”, a digit CANNOT be repeated.

Top tip: start with the smallest totals.

Play interactive Su Doku here.