Sudoku Puzzles

8:35 easy without guess

Agree

19->81

4:07 since switching off the 'allow correct moves' I have been making fantastic times, is that cheating?

Easy elims
Cute kid - who's is that? Where can I get one like that?

Not much has to be said. After filling all the 2's and 9's, every number disappeared gently just by using the magic automatic button.

In case some toughsolver has not his/her dose with today's puzzle, I propose
000010806
100000400
007006030
043020607
000965000
609070510
010800200
005000001
704030000
I needed a 6-FC at 52 filled to eliminate d7=5. What do you think.

7:56, kinda distracted on this one. Ask and you shall receive. I asked on Hard for more people pictures, ta dah, here it is on the tough.

Mush easier than todays medium or hard

To Anne from Albany West Oz. I think if you can do it without allowing correct moves, you are a star- Did you mean INcorrect moves?!!!!!!!!!!!!!

Today's is for simpletons...indeed...lets try GB's toughie...

Whoops, you are so right. Yes, I meant incorrect words. How nice to have a reply from someone in Cornwall. A place I have been intending to visit on my trips to the 'mother land'. Each time I vow & declare that this time is it, and still haven't got past Wiltshire. Oh, well, next time. 2007

to gb: I will give up my xmas shopping and try it. The thing is I am now addicted to the automatic button, so it's gonna be hard to write it down. Yesterday, i had to use a 4 FC and a triple to solve the puzzle. So thanks to challenge us.

10:08 5 mins to set up though as I got distracted.

thanks VALY for heads up on 2 & 9

I agree sal not very tough - no pic though - how is dear old Blighty ?

Do you all turn the timer on and off while studying the puzzle?

Woops. That'd be right.A really quick one and I forgot to set the timer.
Who's cutie is this? Gorgeous eyes!

I turn timer on the moment I look at it, and don't turn it off unless I get interupted, except if I get totally stumped and that usually means I've got a mistake somewhere, so I turn it off while I look for the mistake.
I leave the allow incorrect moves on also - I like the challenge.

to Anne: Clicking off the check so that you can't fill in a box incorrectly facilitates trial and error rather than logic. A person who didn't even understand the rules could finish a puzzle in about 15 minutes just by starting in the first empty box and clicking 1, 2, ... until one fit, then moving to the next empty box.

I wonder if it would be easy for this site to put up a blank template for puzzles like the one gb posed today. There must be other templates out there. Do any of you have something to recommend?

My problem with pencil and paper is putting in all possibilites and then erasing. The crosshatching has to be quite large and even then I end up with an awful, smudgy mess.

18:42....I don't tick the 'allow incorrect moves' box but I do tick the 'remove poss' box. I don't class this as cheating,as I need all the help I can get, however if I put a wrong number in, I do not use this info and carry on doing the puzzle. After all the only person you are cheating is More...

I don't know, gb, but I tried your puzzle twice now, and I couldn't solve it. I use paper and pencil only...so...I'll give it a last fresh try...
How can I EVER be sure it's unsolvable?

14:42. I stopped the clock twice to work it out, but normally I would work it out while the timer continued. See you all tomorrow.

Hi bucko, you made me fear a typo, but I just checked it again and it's right. Do you reach 51 filled by easy ways ? The good of that was that I found my fc applied at this position, so it's a relatively easy puzzle : easy fillings to 51 filled, then looking at 9 in R9 eliminate d7=5 then easy to the end.

8:34

gb - I am very bad at spotting FC's, however, your grid is full of x-wing and swordfish possibilities. I have got to 54 filled using these and still looking for more. I find it amazing that a puzzle considered easy has only 30+ cells at the start, yet one can get to 54 filled in a tough and still be stumped.

gb, I must have made the same error twice...the puzzle is indeed simple, but somehow I just seem to f**k it up, when doing it on a scrap of paper...my fault most probably...(sigh)

Easy puzzle today -- can be solved solely through eliminations (I haven't checked the following for typos):

Part 1
1. Simple elimination: e9=2, c8=2, b1=2, g4=2, i3=2, f6=2, g5=6, c5=9, e1=9, d4=9, c6=1, i2=9, h9=9, a7=9
2. b4 & b6 must = 3 or 4; therefore, b5=5, e4=5, d3=5
3. In More...

Part 2
5. In column-f, 4 must be in f1, f2 or f3; eliminate from f7
6. In column-c, 6 must be in c1 or c3; eliminate from other cells in column
7. In row-7, 7 must be in e7 or f7; eliminate from other cells in row
8. In column-g, 7 must be in g2 or g3; eliminate from other cells in More...

Hi Jimmy,
You precisely raised the reason why I found this example interesting. This puzzle was proposed by 'Simple Sudoku', a solver program from Angus Johnson, and was rated 'extreme'. The solution found by this solver used many xwings, swordfish, coloring, etc. But in fact a single 6-fc does More...

Hi GB,
I got to 52 filled and then used the following:
if b9 or b7 = 9, then e8=5
Proof: If B9=9, f9=9, e8=5. If B7=9, i8=9, e8=5.
Simple to the end from there.
Please let me know if you agree?

Hi Mike : 'Proof: If B9=9, #f9=9#, e8=5.' must be a typo?

GB -
yes of course!. Let me go back and see what I did and re-type it!

13:11 This was easy enough to do without using possibles

I agree that this tough puzzle was not too difficult. This probably should have been a hard puzzle. I usually can't finish the tough ones with out a little cheating... sometimes I need a lot of cheating.

Well! On Hard I said I'd like to see peoples' baby pics and voila! A little cutie!

8.54 - not really a tough, was it?