SUPER SUDOKU NO 866

Test your mental agility with our Super Sudoku and you could win a £100 cash prize, PLUS a Super Sudoku book! Each row, column and 4x3 box must contain all the numbers from 1 to 12. Call 0905 652 2210 for extra tips. Calls cost £1 plus your telephone company’s network access charge.

The Mail on Sunday Book of Super Sudoku is available at a 20 per cent discount, £5.59. Order at mailbookshop. co.uk, or call 01603 648155. P&P free.

The winner of Sudoku No 863 is Betty Hadley, of Sutton Coldfield, West Midlands.

TO ENTER: Text SUPER followed by a space, your 3 shaded squares, reading left to right, name and postcode to 65700. Texts cost £1 plus your standard network charge. Or call 0901 292 5050 and leave your answer and details. Calls cost £1 plus your telephone company’s network access charge. Entries will be accepted until 11.59pm on Friday. See today’s solutions panel for terms and conditions. This week’s solution will be published next week and the winner’s name on Sunday, March 1.