Really fun test concept and a lot of very nice (large, but not very hard) puzzles. Thanks to all the authors and for Deb for having the grand concept.

Congratulations to Psyho and motris, who are the first two competitors to solve all 10 puzzles apart from our live testers.

ETA : nyoroppyi is the 3rd competitor to solve all.

Edited by debmohanty 2012-01-23 11:58 AM

I solved my kakuro too, honest I did, that brings me up to 10 as well! ;)

A small clarification about the score page - The score page displays partial score.
That means you can see the puzzles that you have solved. You can not see others' timings for puzzles you haven't solved. This has several implications, most importantly, the rank you see is not your final rank, even if you stop solving.

Thanks to all involved with this. I found it very enjoyable.
Just a quick question. Now that I've finished I can see a "w" against one of my scores and against those of other people who have finished. Is this supposed to represent the worst puzzle? If so it is not against my worst time or that of others.

I should perhaps look at the IB and find a second puzzle that I could perhaps solve

2706 minutes on a puzzle! All in a row, too. I'll let everyone know tomorrow if I still have a job.

Yes, "w" is worst puzzle. There was a bug and "w" was misplaced for some. It is fixed now.

We also have added a feedback tab to the score page.

Is there a source for Different Neighbors puzzles that can be practiced? The instructions refer to IPC 2010 (Indian Puzzle Championship 2010), but there are no Different Neighbors puzzles there (just "Box", with some similarities but also big differences). Thanks.

Edited by PuzzleScott 2012-01-25 8:59 AM

Check

http://forsmarts.com/pdf/fpb_04.pdf
http://diogen.h1.ru/cgi-bin/contest/result.pl?id=13


Also see other forum thread

Actually issue 5 ( http://forsmarts.com/pdf/fpb_05.pdf ) contains the giant version of Different Neighbours, which could be a better practice in this case :)

Edited by forsmarts 2012-01-25 6:19 PM

In the instructions, it says the puzzles are "large, not hard". That, I can accept. However, when I (an average solver) need over 2 hours to do a puzzle, with no indication that amount of time might be needed, that's something to be avoided in future. I wouldn't normally start a 2 hour contest at 11:45pm, but expecting a 30-45 minute puzzle, it didn't seem unreasonable at the time.

Don't get me wrong, the puzzles are all (well, mostly) brilliant, so thanks to you and the authors for providing this mind food :)

I no-one is confusing PuzzleScot with PuzzleScott!

There is no way to get confused, thanks to your signature

Thanks for your input on specifying the expected solving time for puzzles. We certainly didn't think about it. I'm not exactly sure how we want to implement it if/when we do Marathon2. But I realize it will be very helpful to participants.

A possible solution could be to have an 'average solver' among your testers. (I'm happy to offer my services)
If the average solver is taking over 60 minutes of concentrated effort, it's probably too hard, and needs more clues to simplify a little.
Likewise, top solvers taking over 30 minutes is a sufficient clue too.

Once you realise you're not going to make it in under 60 minutes, you can put the puzzle away and solve it the next day. So I don't really think the harder puzzles are a problem. Though I admit I also expected to have a better chance at solving the puzzles that were labeled "hard" in under one hour.

To be embarrassingly honest, I didn't read all the instructions about scoring before I started! Hence my Kakuro/Sudoku being abandoned and returned to without pressure. I had naively assumed it was the total solve time that would be counted, like in all other contests.

I am trying to understand this part of the scoring instructions:

"Total score for a player will be computed by summing individual puzzle scores. For
players who submit all 10 puzzles correctly, their worst puzzle score will be
discarded."

I submitted them all correctly, but this sounds like I would have received the same score if I had stopped at nine puzzles. Or is it that the worst puzzle score is always dropped? Just wondering... either way, I had tons of fun solving!


Edited by jalbert 2012-01-26 8:32 AM

Depends on which puzzle you submitted last. e.g. Suppose you'd got a bonus in the last one you'd solved, and you've exceeded 1 hour in one of the previous 9, that one would be discarded and you'd have got a better score with the bonus. But of course if you'd exceeded the hour on the last puzzle too and got no bonus, then your score would be the same as it would've if you'd stopped at 9. Hope that clears it up. :)

Finally completed it all.. :)
It was fantastic solving all these puzzles.
my favourite puzzle was kakuro. I learned lot while solving that.
Messed up in 4 of the puzzles otherwise where i could have easily fetched up bonus..
Anyways nice ending..
Thanks to all the authors,LMI and Deb.
Will be waiting for Marathon2.

Well done in Tapa, Loop the loops and especially in Different Neighbours. I expect to you to get 10/10/10 in M2.

First I want to thanks to all organizers and authors for this excellent competition. All puzzles were great and I spend a wonderful time solving it. Yes, Kakuro drove me mad but I finally solve it, and I was more proud to myself to do that then if it was easy. I'm also happy for 2 reasons: for solving all puzzles and getting few bonuses (I'm average solver).
Difficulty of this puzzles was perfect. There are many people who already solve all puzzles, many of them get bonuses. I think this should be the point of competition which lasts for a week. Best solvers will spend more time than usually (in other online competitions) to solve puzzles but they will get bonuses and average solvers also could get bonus for some easier puzzles. And if some puzzle is too hard for you to solve it in 1 hour, you still have all week to solve it and get points. If there will be more competitions like this in the future (I hope it will be) there is no need for making easier puzzles. People will solve it too fast and then there's no point to make one week competition.

Thank you,
Will give my best..
and ya most importantly avoid my carelessness.
:)

re large and hard puzzles being too hard - from an author's point of view I think it's nearly impossible to please everyone. When I put together the nikoli selection last July, I retained the idea of larger puzzles as a bonus because I knew the best solvers of nikoli puzzles would be miles ahead of the average solver in terms of time, and would have a fighting chance of getting 1 or maybe 2 (or as I was shown, 3 if you happen to be Hideaki!) done within the time. The test-solving times for each of those 3 puzzles averaged ~50+ minutes! This didn't really matter to me because for mere puzzling mortals the marathons would be a nice extra to complete out of time.

I don't think its appropriate to go into any sort of detail whilst this contest is still open, but for the kakuro I would say the fastest times are exactly in line with my expectations, and there are enough people scoring bonus time to justify the 1 hour bonus window together with the "hard" label. I suppose that's just my opinion though.

The one issue with the current scoring system as is see it is this. Solvers are essentially rewarded for excellent solves well under the par time, without being disproportionally punished for making a fiddly mistake, or simply having an off solve. There was one particular puzzle I was quite grateful for the opportunity to go out into town and get some shopping before finishing it off later in the evening. This is all well and good, so long as for each given puzzle the chance to affect your bonus is about the same, accounting for an individual solvers differing abilities across different puzzle types. This is a massively complex thing to try and encapsulate and measure such inexact science because different people solve different puzzle types in widely varying times.

Perhaps one solution for next time is to have different bonus windows for puzzles of objectively differing difficulties - for example 45/60/75 for easy/medium/hard? Even then, this seems problematic because you don't want one or two puzzles deciding the whole contest because there happen to be only a handful of solvers who are way ahead of everyone else - in this case you would be handing a free 30 points to people who are especially good at sudoku and kakuro (which is clearly a non-trivial overlap!).


Edited by detuned 2012-01-26 8:45 PM

This seems a bit arbitrary and not a complete fix. While the "easy", "medium", and "hard" labels are rather true to my experience, the breadth of styles means for most solvers it will vary and the top times are telling that the labels aren't perfect. I think the best change is to use either rank on a puzzle for bonus scoring purposes or normalized time (like croco-puzzle). Then easy and hard can be compared, and certain puzzles won't end up being dropped just because they are harder than the rest. Thankfully we will have a lot of solving data with this competition as it has been very popular, so we can model what particular scoring systems would look like once it is finished.

Best of luck and skill to all those still competing.