Bigtone53 wrote:We have probably strolled too far from The Times, but in relation to the 27/9 Djape, I am told that if having filled in the middle ... you consider all the possibilities for the 4 squares r4567 c8, you end up with a firm conclusion about a square in the bottom right nonet. It does not seem to help though and there are only so many hours in the day.

It seems to me that the candidates for r7c8 can be 2,3,4,5,6,7,8 or 9!! Doesn't tell me anything about the bottom right corner box.

I got as far as filling in box 5 with other candidates for rows 4,5,6 as follows:

{123}{123}{23}{8}{6}{4}{9}{57}{57}

{468}{468}{468}{9}{7}{5}{23}{123}{123}

{57}{57}{9}{2}{3}{1}{468}{468}{468}

Apart from the 1s at r2c3 and r8c7, the only other clues I have is that the 21 cage (r8c6,r9c6,r9c7) must have a 7 in it.

Hopefully DJAPe will advise soon whether this is actually solvable by hand without trial and error. As mentioned previously, I did look at the solution but it didn't help to work out how the answer had been arrived at.

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