Not a Friday Puzzle

Here's a Masyu I put together, because I really enjoy putting Masyu puzzles together.  There are a few moments where you'll need to watch your step if you aren't so familiar with genre, and maybe even if you are.

By the way, I've updated how I rate the difficulty of my puzzles.  You can read more about it here, if that kind of thing floats your boat.

Enjoy!

    #347 Masyu – rated 5/10 [Medium]

All puzzles © Tom Collyer 2009-20.

A small correction to the record

As much as I have tried my best to avoid having conversations about the puzzling community, it seems that I am still the subject of whispers and rumours.  This is something that I ought to find amusing and pathetic in equal measures, and I definitely do, but something about it is still bothering me a little bit.  So here goes, better out than in.

It seems as if there is a perception that one of the reasons I have been previously critical of the WPF is as follows.  At a time, I coveted the role of being the WPF's sole paid employee (misleadingly titled "Director").

This is ridiculous for any number of reasons, but here are two very good ones:

 - I have posted numerous times that my opinion is that those anywhere near the organisation of competitions they are responsible for should not also participate.  I enjoy(ed) participating in sudoku and puzzle competitions for many years, particularly at the world championships, and I have stated several times that I don't think the Director should participate competitively.  My supposed desire to be Director at any point in time directly contradicts what I have stated several times.

 - The WPF doesn't pay nearly enough compared to my current full time job to really consider this worth doing on anything other than a part time basis.  Having previously volunteered my time as the competition director of the Sudoku GP in 2016, I know this would have to mean changing my current employment arrangements, or else being miserable because I had no spare time.  Neither of these options as ever struck me as being attractive.

I should have thought the true reasons I have previously been critical of the WPF are entirely self-evident.  If that's not the case, then too bad, all that stuff is something I have zero interest in revisiting.  To absolutely clear, my current opinion of the WPF is this: I do not give a flying focaccia about the WPF.

All I'd like to add is that it is my opinion that the source of this particular rumour is either a liar or a fantasist.

Thoughts on copyright and online puzzle applets

I'll start by saying this is a subject that I remain a bit unsure about and I am going to be careful not to come to too many conclusions.  If there's one thing I'd like to tell my dearest readers before carrying on, it's that if you are going to use internet tools to make versions of my puzzles, please can you do me the courtesy of telling me you have done so, and (as per the licence of puzzles published on this blog) please can you ensure that you (a) credit me and (b) provide a link to the licence each time you share a link.

Puzzle Sprints: pilot version

The purpose of this post is to see whether I can manage to roughly approximate the halcyon days of the nikoli time trials.  The idea is for anyone who is interested to turn up to this blog at a fixed date and time, and then race to see who can get the fastest solve time for a particular puzzle.  For the time being, the particular puzzle will very likely be a classic sudoku.

In retrospect this doesn't sound anything like a time trial.  Therefore I will call my version "Puzzle Sprints".

The way it will (hopefully!) work, at least initially, is as follows.

1. I will schedule a post at a fixed date and time with a link to a Google form, which contains all you need.  For the real thing, the fixed date and time will be advertised in advance.
2. The form requires you to be signed in to Google (in order for me to impose a limit of one response per participant).
3. Therefore, to participate you will need both a Google account, and to be logged into that Google account.
4. Once the form loads, you should see a short description, together with:
1. A link to the puzzle to be solved in an external online solver.
2. Space to enter your email and nickname.
3. A static image of the puzzle with the two answer keys marked.
4. Space to enter the two answer keys into the form.
5. To take part in the Puzzle Sprint, open up the link to the online solver and solve the puzzle.
6. Once you have solved the puzzle, come back to the form, and then enter in the corresponding answer keys.
7. When you are done, hit the "Submit" button.
8. Once you have submitted, you can click the "View Score" button to instantly see if the answer codes you submitted were correct.
9. After a certain amount of time has passed, I'll declare a cut-off and publish the results.

For those interested in this pilot version, please note there is absolutely nothing at stake here.  You are more than welcome to poke around, but for the next few hours after this initial post, it is highly unlikely you will be getting anything out of this, as I will be making plenty of edits and updates.  It is mostly for my own benefit for now.

Here is the link: https://forms.gle/WQYhioNFFfCiUC2TA

Once I am happy with the way things seem to be working (I will edit in a message to this effect within this post when I am happy), please do feel free to have a go.  If nothing else, submitting an entry to this pilot version is a good way for me to see who might be interested in this kind of thing.

There are several limitations to the approach as it currently stands.

• I don't like people having to log into Google to be able to do this.
• I don't like having to worry about collecting people's emails.
• Ideally there'd be some kind of self-contained and robust log-in system akin to things like nikoli, fed, croco and so on.  This would completely negate the need to use something like Google forms in the first place.
• I am not 100% satisfied with any online solving interface for the purposes of these Puzzle Sprints, where the emphasis is very much on speed solving.
• I don't want an undo function
• I don't want a trial and error function
• I do want much better pencil-marks
• I also want the online solver to directly interact with the form so there's no extra faff switching between solver and form.  (This is no longer an issue once you eliminate the need for a form...)
• If this were to ever get very serious, I would also want some way for winning solves to be verified.  (Most likely this would involve saving some kind of solve history and having replay functionality...)
• Now the cat is out of the bag, anyone can come along and imitate my idea.  

Not that anything I've described here is original, and I have no doubts any number of more talented people could execute this much better than I can but this is still something that I'd like to try and get off the ground on my own terms.  As per my other posts, I'd like to be able to do something positive again for my own benefit as much as anything else.  If people still insist on being negative about that (or anything else), then all I can say is that I'm done caring.  Such people are no longer of any interest to me.

There are the following advantages to the approach.

• Everything is more or less under my control.
• The format gets to the heart of what is really exciting about speed-solving.
• My reputation as a good puzzle author.
• My reputation as a good sudoku competition director.
• I am willing to eventually provide cash prizes (for UK based participants)

That's it for now.  I'm intrigued to see whether anyone is going to be interested in this.

Thoughts on the near future of this blog

So I put out some puzzles earlier today, and I called them Friday Puzzles because it happens to be a Friday.  However I don't think it's going to be a revival of a regular series of posting.  I suspect that whenever I do post a puzzle, I'll retain the numbering, but I won't be too bothered about things if the day in the week happens not to be a Friday.

There are a couple of things to look out for in the near future of this blog.

The first thing will be an exploration of my interest in ratings systems.  Generally the ratings systems used in the likes of Football, Tennis, Chess, various computer games all leave at least something to be desired, and I have some ideas which might go some way to addressing these short-comings.  There is a lot of good, freely available, data in the results of various puzzle and sudoku competitions covering a good period of time, and so this is probably where I'll make a first go of things.  Needless to say this will be strictly unofficial, in association with no-one other than myself, and on a just-for-fun basis. 

My exact mechanism might need a few goes to get the details exactly right, and will probably reveal its own set of shortcomings, but I am excited to be giving that a go in the coming weeks.  I'll probably put out a blog post outlining some of the theory behind my ideas as well.

My second idea is to revive something like the old Nikoli.com time trials, whereby I'll put out a puzzle at a given time, and then anyone who happens to be around races to register the first finishing time, which i affectionately remember being referred to as a "1get".  This won't be a 100% polished experience without any further expertise and collaboration, but on the other hand I think plenty is achievable with the likes to google forms and pzv.jp.  I'd probably look to be handing out some kind of prizes to UK participants at least.  Note that this would be purely on my own behalf, and not as part of any organisation.

My third idea might look to start some kind of a puzzle club that eventually ends up replacing regular puzzles being posted here.  This may well feature sudoku variations that are on the harder end of the difficulty scale, and that may cross over the "solves like" criteria of the "What is a Sudoku?" view of the world.  Maybe this gets splits up into seasons, or even just over the course of a year, and again with some kind of self-funded prizes being up for grabs.  This is probably the least developed idea I have for now, and I can certainly see it ending up down one of many possible initial choice of routes.

Time will tell as to how far are get with any of those three ideas, but I am quite excited by the idea of doing things on my own terms and seeing what happens.  It feels like reviving the spirit from the good old days a bit, and i think will help me feel a bit better about the puzzling world.  Hopefully that will end up being the case!