Asian Sudoku Championship 2025
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Puzzle Marathon 2015 - LMI March Puzzle Test - 6th to 15th March160 posts • Page 6 of 7 • 1 2 3 4 5 6 7
@ 2015-03-18 8:39 PM (#18004 - in reply to #17765) (#18004) Top

auroux



Posts: 145
1002020
Country : France

auroux posted @ 2015-03-18 8:39 PM

A practical reason for having a bonus timeframe limit, even if it's something very long like 3 hours on the very hard puzzles, is that many of us are not available 24 hours a day for puzzles. With the current marathon system with a 60 minute limit, when I have a chunk of time for puzzles I will start as long as I have at least 45 minutes ahead of me for a puzzle rated "easy" and 60 for other puzzles. After that I may have a meeting with a colleague or a student and can't keep my office door shut, or I may need to go pick up my daughter at her daycare, also not a negotiable thing. So: it is important to know in advance how long to allocate from the time we start a puzzle to finish it competitively. (To give an example: Summon took me over 24 hours because after breaking it multiple times in the evening that I started, I really had to get some sleep ahead of an important presentation, give the presentation, meet with colleagues, and then go catch a flight back home. I finished the puzzle halfway through the flight and still had to wait a few more hours to input the solution once I was back on the ground with internet access. Okay, perhaps I could have not slept as much if it had really mattered, but that would have been really unpleasant.).
@ 2015-03-18 10:03 PM (#18006 - in reply to #17765) (#18006) Top

kousek-nebe



Posts: 20
20
Country : Czech Republic

kousek-nebe posted @ 2015-03-18 10:03 PM

 Your 3 most favorite puzzles of the contest. Hidoku
 Your 3 most favorite puzzles of the contest. Regional Coded Snake
 Your 3 most favorite puzzles of the contest. Regional Battleships
 How balanced do you think the puzzle types of this test were? Fairly balanced
 What did you think about the puzzle quality of the test? Very nice
 What is your opinion about rules, points and scoring for this test? Fair


@ 2015-03-18 11:12 PM (#18008 - in reply to #17988) (#18008) Top

rakesh_rai




Posts: 774
500100100202020
Country : India

rakesh_rai posted @ 2015-03-18 11:12 PM

anderson - 2015-03-17 6:14 PM

...I also have to mention that the box in the middle of the hidoku was extremely cute as well as the 360-400 path...

Yes. The box was indeed quite interesting in terms of the logic to decide what numbers go inside.

Paul - 2015-03-17 3:52 PM

I would love to get starting instructions, on how to solve each type of puzzles.

Paul: The above is one of the starting points for Hidoku. Apart from this, you also get to fill numbers fast in
- the bottom-right corner
- top left corner
- around the number 1
- you also get 400 easily (a cell to which only one cell can be connected)
- even in the bottom left corner lot of numbers can be placed
@ 2015-03-19 1:37 AM (#18009 - in reply to #18002) (#18009) Top

forcolin




Posts: 172
100202020
Country : ITALY

forcolin posted @ 2015-03-19 1:37 AM

rakesh_rai - 2015-03-18 3:30 PM


Regarding point no 1, ideally yes. But practically (more from a solver's perspective) we cannot have an indefinite bonus timeframe. There has to be a limit - it can be different for different puzzles. We have had suggestions earlier that this upper limit can be 45/60/75/90/120.


I do not think that to lower the bonus threshold for easy puzzles is a good idea. In this edition there have been 6 players which have obtained 400 points for having submitted at least 8 solutions but failed to achieve a single bonus. The reduction to 45' for easy puzzle will increase the number of these players; The other option ( to increase the threshold for difficult puzzles) is a better idea.

stefano
@ 2015-03-19 1:47 AM (#18010 - in reply to #17989) (#18010) Top

forcolin




Posts: 172
100202020
Country : ITALY

forcolin posted @ 2015-03-19 1:47 AM

swaroop2011 - 2015-03-17 7:29 PM

I have made a solution tutorial for Nurikabe and kept, and so sharing with you all.
Hope it helps to get you some idea behind the thinking of that puzzle creation.


http://swaroopg92.blogspot.com/2015/03/tutorial-to-solve-marathon-n...

Very interesting. Some of the techniques are very useful. I got some of them but had to adopt T&E a few times. Consequently, I broke it twice.
@ 2015-03-19 4:19 AM (#18011 - in reply to #18010) (#18011) Top

swaroop2011




Posts: 668
500100202020
Country : India

swaroop2011 posted @ 2015-03-19 4:19 AM

forcolin - 2015-03-19 1:47 AM

swaroop2011 - 2015-03-17 7:29 PM

I have made a solution tutorial for Nurikabe and kept, and so sharing with you all.
Hope it helps to get you some idea behind the thinking of that puzzle creation.


http://swaroopg92.blogspot.com/2015/03/tutorial-to-solve-marathon-n...

Very interesting. Some of the techniques are very useful. I got some of them but had to adopt T&E a few times. Consequently, I broke it twice.


I guess, the bottom right solving of 6's was last step, and if you try to do that first it will lead you to T & E
Though it has unique solution in itself and can be solved earlier but it becomes easy if you keep that for last :)
@ 2015-03-19 8:31 AM (#18012 - in reply to #17765) (#18012) Top

Administrator



20001000500202020
Country : India

Administrator posted @ 2015-03-19 8:31 AM

Puzzle and Solution Booklets

Consolidated puzzle booklet (all ten puzzles, without password) and solutions booklet are now available at http://logicmastersindia.com/2015/03P/.

@ 2015-03-19 8:53 AM (#18013 - in reply to #17850) (#18013) Top

rakesh_rai




Posts: 774
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Country : India

rakesh_rai posted @ 2015-03-19 8:53 AM

Nikola - 2015-03-08 2:40 PM

Is it possible somewhere on the score page to display the number of incorrect submissions? I'm so happy I do not have any.

Among the Top 20, we have six participants with zero incorrect submissions:

Image and video hosting by TinyPic
@ 2015-03-19 8:58 AM (#18014 - in reply to #17852) (#18014) Top

rakesh_rai




Posts: 774
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Country : India

rakesh_rai posted @ 2015-03-19 8:58 AM

bskbri - 2015-03-08 5:16 PM

It would have been much better to present the words in a monospaced font (courier) for the scrabble loop puzzle.
Yes. Counting the word length would have been easier with Courier. This suggestion will be adopted for similar puzzles in future.
@ 2015-03-19 3:50 PM (#18018 - in reply to #17765) (#18018) Top

Zormac



Posts: 15

Country : Hungary

Zormac posted @ 2015-03-19 3:50 PM

 Your 3 most favorite puzzles of the contest. Scrabble with Loop
 Your 3 most favorite puzzles of the contest. Fillomino
 Your 3 most favorite puzzles of the contest. Regional Battleships
 How balanced do you think the puzzle types of this test were? A bit skewed
 What did you think about the puzzle quality of the test? Very nice
 What is your opinion about rules, points and scoring for this test? Fair


The reason I put "A bit skewed" is that I consider Fillomino and Nurikabe as classic types and all the other puzzles as variations / mixtures / novelties (to me at least).

Therefore I believe the set was a bit skewed against classics - with the large grids in play, I would prefer a larger portion of classic puzzles.
@ 2015-03-19 4:48 PM (#18019 - in reply to #17765) (#18019) Top

chaotic_iak




Posts: 241
1001002020
Country : Indonesia

chaotic_iak posted @ 2015-03-19 4:48 PM

I believe Statue Park is now represented well in the community that it's considered a classic as well (just like Tapa). Hidato (here Hidoku) is also actually a classic, although not commonly found in the puzzle community for some reason.

However, yes, the easy puzzles are all classics and the difficult puzzles are mostly non-classics.
@ 2015-03-20 1:39 AM (#18023 - in reply to #17765) (#18023) Top

tamz29



Posts: 225
10010020
Country : Thailand

tamz29 posted @ 2015-03-20 1:39 AM

What made this year's marathon a let-down is because after 3 good previous editions, we'd love to think that we have everything sorted out by now.
The puzzle selection is not the problem but the difficulty is. We have 2 people finishing Summon and less than 20 finishing Snake and Hidato (okay, hidoku).
There have been suggestions about extending the time limit to 90, 120 etc. but personally I am not looking forward to this at all.
It is a tall order for any single puzzle lasting 100+ minutes to still be within the fun-zone. Imagine having to stare at the same tedious puzzle for 2 hours, no thank you.

Back to the difficulty level; this year seemed like it was a race for the authors to see who could come up with the hardest puzzle.
I prefer marathon puzzles to be like ones from Nikoli where the idea of "marathon" is slowly and steadily dismantling a big puzzle consisting of easy-medium logical steps.
I understand that not all puzzle types work like this, especially ones that require more global than local relationships.

Hidoku and Summon would still qualify as a marathon puzzle in this regard but their solving paths were way too narrow for the one hour limit.
However, both puzzles were beautiful and logically solvable enough to discourage trial and error. I would have enjoyed both Hidoku and Summon anywhere else than in a competition.
Then we have RC-Snake where I honestly don't see any logical way into the puzzle apart from bifurcating and bifurcating.
Scrabble was another guess-y type, but only because Scrabbles are generally intuitive>logic anyway.

Ok. Last thing I promise.
I don't agree with familiarity = easy (or easier).
So I find sentences like..." [this puzzle] was meant to be easier than [that puzzle] because it is more familiar" rather invalid.
Serkan can provide Tapas from childishly-easy to unreasonably-difficult any day, so I think we should consider each puzzle as a stand-alone when
categorizing them as a whole set.


Edited by tamz29 2015-03-20 1:41 AM
@ 2015-03-20 9:49 PM (#18032 - in reply to #17765) (#18032) Top

An LMI player



An LMI player posted @ 2015-03-20 9:49 PM

 Your 3 most favorite puzzles of the contest. Hidoku
 Your 3 most favorite puzzles of the contest. Summon
 Your 3 most favorite puzzles of the contest. Statue Park
 How balanced do you think the puzzle types of this test were? Perfectly balanced
 What did you think about the puzzle quality of the test? Very nice
 What is your opinion about rules, points and scoring for this test? Fair


@ 2015-03-20 9:58 PM (#18033 - in reply to #18023) (#18033) Top

forcolin




Posts: 172
100202020
Country : ITALY

forcolin posted @ 2015-03-20 9:58 PM

tamz29 - 2015-03-20 1:39 AM
Then we have RC-Snake where I honestly don't see any logical way into the puzzle apart from bifurcating and bifurcating.

bob - 2015-03-15 4:21 AM

In particular, the Regional Coded Snake was utterly impossible for me, far more difficult than summon (the second hardest). Normal snake puzzles are a bit of a slog, trying out various bits and pieces until all of the numbers fit. But, here there is only a code. So it is trial and error and error and error and error and error... I put in over 6 hours over three separate evenings just on this one puzzle, far more than any of the others, and far beyond when it stopped being fun. I gave up for the first time ever. Just gave up. Ugh do I detest snake puzzles. Every change I tried would break one of the complex rules, usually on the other side of the board.

Bob

I found the regoinal snake very beautiful and logical. I have prepared a walkthrough
It' s possible to download it from http://web.freepass.it/sf2l/snake walkthrough.pdf

@ 2015-03-23 4:19 AM (#18062 - in reply to #18033) (#18062) Top

bob



Posts: 59
2020
Country : United States

bob posted @ 2015-03-23 4:19 AM

Thank you stefano for the walkthrough. I came to many of the same conclusions and the overall contour of my snake was similar. My critical error was a false assumption that "E" was the only letter that could represent "2". In all of my trials "A" had to be "3" or higher. And my solutions came close but obviously could not be fixed. But the excellent walkthrough describes the thinking required. Thanks again. Perhaps I will rescind my current lifetime boycott of snake puzzles and risk getting frustrated again. It's the only way to get better.

bob
@ 2015-04-04 10:56 AM (#18164 - in reply to #17765) (#18164) Top

An LMI player



An LMI player posted @ 2015-04-04 10:56 AM

 What is your opinion about rules, points and scoring for this test? Fair


Puzzle Marathon 2015 - LMI March Puzzle Test - 6th to 15th March160 posts • Page 6 of 7 • 1 2 3 4 5 6 7
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