the hardest Kakuro puzzle?

For fans of Kakuro

the hardest Kakuro puzzle?

Hello,

I'm trying to find the hardest existing Kakuro puzzle, no luck so far.

Is it the last puzzle in the last book (Book 100) of this series: http://krazydad.com/kakuro/index.php?size=15x15 ?

Is it a puzzle in this book: http://www.amazon.co.uk/Second-Degree-Black-Belt-Kakuro/dp/1402787979 ?

Is it the puzzle mentioned here: http://www.thefreelibrary.com/SOLVE+THE+BEAST+TO+BE+GURU+OF+KAKURO%3B+Try+our+fiendish+Bank+Holiday...-a0300762206 ?
(can't find the actual puzzle anywhere)

Any help will be appreciated
pmin00

Posts: 4
Joined: 03 July 2012

Re: the hardest Kakuro puzzle?

Hi pmin00
Welcome on this forum

pmin00 wrote:I'm trying to find the hardest existing Kakuro puzzle, no luck so far.

In Kakuro, there's no standard or pseudo-standard way of measuring hardness - contrary to Sudoku, where SER is a more or less accepted rating, in spite of its many shortcomings (the main reason IMO is, it's the only available free rating !!).

Contrary to Sudoku again, the grid can have any size. It's obvious that, in the mean, a large Kakuro will be harder than a small one. But this also depends on the relative density of white cells and on their topology. And a small sized one can be much harder than a large sized one.
Moreover, contrary to Sudoku also, there has never been any systematic search for the "hardest" Kakuro (in any meaning of the word), even for fixed grid size.

The hardest ones I've found are on atksolutions.com, most of them 14x14.
I use my own rating system, based on whips and braids (meaningful for any Constraint Satisfaction Problem and therefore for many logic puzzles).

pmin00 wrote:Is it the last puzzle in the last book (Book 100) of this series: http://krazydad.com/kakuro/index.php?size=15x15

The display is awful, but it seems rather easy, using lots of surface sums.
BTW, all the crazy_dad I've tried were very easy.

If the puzzles are not available, no chance we can check them.
In any case, commercial books don't sell hard puzzles. They sell puzzles normal people can solve without getting headaches.

[Edit: see Smythe_Dakota evaluation of varied websites here: http://forum.enjoysudoku.com/kakuro-references-t31059.html]
denis_berthier
2010 Supporter

Posts: 1253
Joined: 19 June 2007
Location: Paris

Re: the hardest Kakuro puzzle?

pmin00 wrote: .... Is it the last puzzle in the last book (Book 100) of this series ....

In all probability, if it's a krazydad puzzle, it's childishly simple.

denis_berthier wrote: .... commercial books don't sell hard puzzles. They sell puzzles normal people can solve without getting headaches. ....

I find myself in the unusual (and not always comfortable) position of being a normal (well, only half-normal, maybe) person on a forum full of geeky gurus. Maybe you, pmin00, fall into the same category with me.

I refuse to use any "advanced solving technique" named after any animal species. Along the way I've discovered a lot of ad hoc techniques. With kakuro, I almost invent a new solving technique every time I look at another puzzle. For me, that keeps kakuro (unlike sudoku) fresh and interesting.

But it also means I'm usually not interested in super-hard puzzles, unless someone points one out to me that has some kind of interesting or unusual feature. With ATK, for example, I'll generally stick with the medium-level puzzles.

Anyway, welcome to these forums!

Bill Smythe
Smythe Dakota

Posts: 538
Joined: 11 February 2006