@ foxlee2
Daily Mail, front page of coffee break section in middle of paper, centre sudoku is the prize one normally has 3 shaded squares, but for some reason they were not there on Friday.
@ beegeebee,
we're talking Daily Mail, why write to the Express?
Just had a look - my copy doesn't have any shaded boxes either. I'd never noticed that Sudoku particularly before as I only do the 5 star one and the mini (plus pitcherwits and codeword).