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Submitted by: uno hu

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A clown fish? 5:25
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Possible proof of not tough enough sudoku of 09 13 06:

1) Start at 22 filled - the given puzzle. Unique Possibilities to 27 filled. (UP 27).
2) fc on 1's: i3 == b3 -- a1 == a8 forbids i8 UP 81
Sets: 2 Depth 2 :Rating .03.
Site in serious danger of losing reputation for having good puzzles, methinks!
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Haven't been here in awhile but finished all 4. Not my best time though.Practice does make a difference.
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Very colorful!
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I guess I'm not sure how these proofs are done...which way is A-I and which way is 1-8?

A1 is a given so how does it fit into ==A8?
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Hi Fred - notation is similar to algebraic chess board notation. Columns are a thru i, left to right. Rows are 1 thru 9, bottom to top.

Explanation of == and -- available through 'proofs' link on this page.

Shorthand here when looking at just one type of candidate: I did not write down then '=1' 's.
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WAAAY too many guesses - Yes, Jeannette, practice does help!
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Same happens at a2=2==d2=2 forbids a7=2 UP81
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I would surmise the mentally challenged were distressed by the sometimes arcane chatter and baffling - possibly evil symbolism employed by the provers at this site - and lobbied or otherwise blackmailed the web-master into de-clawing the toughs
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Is that teardrops i detect? I can share that,i have lost a SON.
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Agian, the definition of what defines a tough is not its difficulty but its tool requirement.

Easys are all unique numbers to solve
Mediums require cross hatching and row/colunm ownership
Hards require candidate elimination
Toughs require chains.

chaining is the hardest More...
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Zoel - although I appreciate your definitions, and albeit they are generally accepted in many circles, to claim that tool requirements is the only measure of definition for puzzle labels is perhaps more the result of the difficulty in assigning proper lables then any other cause.

There More...
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Hi Pat!
The conspiracy theory you present may require too much depth to prove.
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When the puzzles get easy, I muse over techniques that one may never find the occasion to use:

Possible explanation of Sue De Coq two sector disjoint subsets:

Consider the following hypothetical situation in a puzzle:
S1: a123=56789 - 5 candidates in three cells, in the same More...
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Of course, one may have to chain in order to get some of these sets as strong - the step 5a mentioned above is a rather strained example of the same - and it did not get the wrap around quality - only some of the eliminations applied (unless I missed something - which is of More...
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Hopefully, it is understood that some elements in each matrix could be missing without losing the technique:

For example:

a1=5 a1=6 a1=7 a1=8 a1=9
a2=5 0000 0000 a2=8 0000
0000 0000 a3=7 0000 a3=9
a4=5 a4=6 0000 0000 0000
0000 0000 b1=7 b1=8 0000

would still have More...
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Good mAen to all! Way long long on this one today!! Isn't she/he cute?
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to Steve:
you may just have put the theory to the test.
the enemy is circling in a frenzy at this very moment, praying and cursing the heathen Sudoku
prover. I expect Homeland Security will pull the
site within a day!
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I repeat, GOOD MAEN to every ONE !
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I saw your comment about the tough of 2/17/06 a few days ago. Your proof was a little beyond me so I posted one using only 'simple' or single number fc's. For the safety of us all, you may want to take a look. :-)
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there's nothing to comment about the picture..So i suppose you all did it just to show off to everyone 'how good' you were in solving the easy puzzle.This type of action is very disgusting. Please stop this childish behaviour
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pretty easy, 8:07 after setup including the time when I left to go put a show on TIVO for my daughter and forgot to stop the timer!

THat is certainly a freaky picture.
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been doing it,doing it,and doing it..so many interruptions..cant concentrate..but seems to be a straight forward one..finished at last to see this fountain..
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18.22 with 7 wrong guess
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Oct. 6, 2007.
06/Oct/07 10:25 PM
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05/Sep/10 9:59 PM
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