Thanks for posting this. Didn't manage to get Saturday's Times, and heard about the Samurai from a few friends. However, from your scan, they appear to be show partially shaded squares, with what looks like pencilmarks in them. E.g. Top right su doku, column 5, row 2. Looks shaded with a small 8 in it (which can't be, because there is already an 8 in that row). There appear to be 4 of these shaded squares in total. Could someone clarify what they are?
Would like to transcribe this puzzle into MS Excel, and print it off to have a go.
Thanks.
Kevin.