is.gd/hoke_431

No Chains. Probably too easy for the usual suspects. Perhaps those should try to solve it without inserting candidates first. At least 10 fields and 4 Setti values can be solved with some thinking.

is.gd/stefan_431

no chains, just standard tool (but maybe a lot of them...)

Stefan, Good to see a puzzle from you after quite a while.

Out of interest, when you say standard tools, do you include UR.

Thanks, Stefan for that you are not so retired like some other puzzle creators :-)

thanks Stefan, I like this kind of puzzles very much.

thank you Stefan for this great puzzle, liked it also very much.
And welcome back! hopefully for a Longer time

nice. only two little oberservations needed:

G14 <> 9, which follows from symmetry in GH69, and
E8 <> 2, which is given by our very dear Setti

another approach using CE: after E89≠589, the rest is just singles and x-wings (too easy for my taste)

Hi Klaus,

Nice and quite easy puzzle, yes!

Row E opens with little bit logic and Setti on 2 as you wrote.

Rows GH (and all the puzzle) I solved “normally”– I’m eager to learn more, so would you tell more about reasoning behind the symmetry you wrote: G14 <> 9, which follows from symmetry in GH69.

Hi Martin,

already from the very start you can see that the possible candidates for G69 and H69 are completely symmetrical. no clues given, the influence of the columns is the same on both, the restriction 1-5 from the left side of the two rows is the same.

as long as you have complete symmetry the solution of the puzzle cannot be unique. for any given solution just change G69 with H69 and you have a second solution.

and in our concrete situation the only thing that can break the symmetry is a 5 in G14. so this has to be the case.

Hello Klaus,

long ago you mention your own written program to solve and create str8ts puzzles. May I ask which language you used?
Thanks in advance

... mentioned ...

Hi b.eu,

i use good old Java.

May i ask you what b.eu stands for?

Hi Klaus,
thanks for your quick response. I choosed this nickname bescause my first one was occupied by somenone else. If you want to, you can read it as "boy" (because I am male). The other meaning is an abbreviation for bxxx.eu, which is my own domain. As you may assume, xxx are NOT the real letters :-).
Warm regards
b.eu
PS: Is your software under public domain licence? I would be interested in studying it to participate of your tremendous knowledge.

What a funny idea! I have studied many programs during my life time and in the best case found out, how they were doing what they did.

@Klaus - do you live in Brasilia currently? Then I would like to send you an XING contact request.

Hi b.eu,

my software is just a little private project i started (and ended) a long time ago. no standards, no documentation, nothing anybody (including me these days) can understand.

and i do not have any special knowledge about Str8ts, surely not more than the usual suspects.

there are not too many things, basics, Settis, Wings, UR-arguments, sometimes you can combine something into a tricky argument thats nice, thats it.

and no Brazil for me, im german, i live in germany, love it.