dailysudoku.com

I have just learnt that a colleague of mine does sudoku. He tells me that the hints (which he occasionally looks at) seem to rely on entering candidate numbers in each cell - he said that he finds thi ...

I had exactly the same position as Amy. You may remember me, the one who confused himself with too many digits a few weeks ago! Same thing happened again here. Normally, BEFORE I resort to filling in ...

... but not in Sydney!

Thanks again everyone.

phil

david

Yes, of course and I'm sure that it will all fall out now.

Unusually for me I panicked and coded up all possibilities in all remaining cells (I usually tend to prefer just looking and seeing . ...

Ok folks here is where I am at:

203 510 000
109 002 305
560 003 012

300 005 246
456 238 001
792 641 538

830 100 029
627 000 103
900 320 000

David. I had located the 8 as you say but that hasn't gi ...

Am I being completely stupid or is this tougher than it might appear. I have spent longer on this than I have on many 'very hard' but have come to a complete standstill. If someone tells me it's not t ...

That's very helpful coming from an expert. It does more or less confirm what I had suspected - interesting though, and thanks for taking the time to post such a detailed response.

I am intrigued to know whether there is an order to the solution of a puzzle.
Clearly towards the end the answer is NO as there are many different ways to fill in the EASY remaining blanks. Similarly ...

guest and Geoof's reply.

First of all, the guest has reached EXACTLY the same position as I did when I almost gave up, so I think that the guest has been using the same strategies as me.

Geoff: am I ...

I have to admit that I found this hard!

I have managed to do every other Sudoku puzzle (in the month that I have been doing them) by filtering and looking at PAIRS and gaps in sequences. This include ...

still puzzled. Hollydoll's table has r9c9 blank - where's the 1?

Why does r9c8 have to be a 4?

On the other hand, observe that the pair of numbers left for r2 are 2 and 9; since the 9 cannot be placed in r2c4, it must go in r2c9 etc.

Phil

I agree ... definitely only one way to complete the 'near solution' given in the first post.

Phil

r8c3 is given as 6 in the PUZZLE (i.e. it is 'fixed' from the outset). Thus these are not solutions to the same puzzle but to 2 different puzzles.

phil

Whoa katie !!! Some of us are mere mortals and struggle on the 'hard variety' How much time do you spend on them?

Phil

r9c8 or r9c9 must be 1 (reason: r5c7)
Hence r8c4 or r8c5 must be 1
Also r8c4 or r8c5 must be 3 (reason: r7c8 & r9c1)
Hence r9c4 must be 4

Hope that helps

Phil