SM 2024 R3 - Math & Neighbours (5th - 11th Apr) Score Discuss
Riad's April Contest 2024 (13th - 21st April) has started Discuss
forsmarts 15th Anniversary contest (2017) - 16th to 19th Feb 201850 posts • Page 2 of 2 • 1 2
@ 2018-02-19 9:28 PM (#24292 - in reply to #24291) (#24292) Top

Administrator



2000100050020
Country : India

Administrator posted @ 2018-02-19 9:28 PM

Contest extended by 24 hours


Based on requests, the test end time is now extended by 24 hours, and will be open full day on 20th February. Check submission page for exact timing.

@ 2018-02-20 1:52 AM (#24293 - in reply to #24242) (#24293) Top

Gotroch



Posts: 83
20202020
Country : Czech Republic

Gotroch posted @ 2018-02-20 1:52 AM

 What was your opinion of the distribution of easy/hard puzzles? Just right
 What did you think about the puzzle quality of the test? Very nice
 Which set of puzzles did you like the most? Incorrect Products
 What was your opinion about the answer key extraction? Mostly perfect answer keys
 Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? Most puzzles were worth the right amount
 What was your opinion of the booklet formatting and printing? Just right


@ 2018-02-20 4:22 AM (#24294 - in reply to #24242) (#24294) Top

kiwijam



Posts: 182
10020202020
Country : New Zealand

kiwijam posted @ 2018-02-20 4:22 AM

"Contest extended by 24 hours" post is not visible when I'm not logged in.

Edited by kiwijam 2018-02-20 4:22 AM
@ 2018-02-20 8:01 AM (#24295 - in reply to #24242) (#24295) Top

swaroop2011




Posts: 668
500100202020
Country : India

swaroop2011 posted @ 2018-02-20 8:01 AM

 What was your opinion of the distribution of easy/hard puzzles? Too many medium difficult puzzles
 What did you think about the puzzle quality of the test? Very nice
 Which set of puzzles did you like the most? Unknown Calendar
 What was your opinion about the answer key extraction? Perfect answer keys
 Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? Most puzzles were worth the right amount
 What was your opinion of the booklet formatting and printing? Just right


Well interesting set of puzzles. Wasted lot of time in switching between puzzles and couldn't complete lots of them. Have to solve remaining.
Thanks for the test.
@ 2018-02-20 10:32 AM (#24296 - in reply to #24242) (#24296) Top

An LMI player



An LMI player posted @ 2018-02-20 10:32 AM

 What was your opinion of the distribution of easy/hard puzzles? Too many hard puzzles
 What did you think about the puzzle quality of the test? Very nice
 Which set of puzzles did you like the most? Triangular Minesweeper
 What was your opinion about the answer key extraction? Perfect answer keys
 Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? Many puzzles were worth too much or too little
 What was your opinion of the booklet formatting and printing? Just right


@ 2018-02-20 12:16 PM (#24297 - in reply to #24242) (#24297) Top

An LMI player



An LMI player posted @ 2018-02-20 12:16 PM

 What was your opinion of the distribution of easy/hard puzzles? Too many medium difficult puzzles
 What did you think about the puzzle quality of the test? Fairly Nice
 Which set of puzzles did you like the most? Unknown Diginet
 What was your opinion about the answer key extraction? Mostly perfect answer keys
 Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? Most puzzles were worth the right amount
 What was your opinion of the booklet formatting and printing? Just right


@ 2018-02-21 3:37 AM (#24301 - in reply to #24242) (#24301) Top

An LMI player



An LMI player posted @ 2018-02-21 3:37 AM

 What was your opinion of the distribution of easy/hard puzzles? Just right
 What did you think about the puzzle quality of the test? Very nice
 Which set of puzzles did you like the most? Unknown Calendar
 Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? Most puzzles were worth the right amount
 What was your opinion of the booklet formatting and printing? Just right


@ 2018-02-21 6:41 AM (#24302 - in reply to #24242) (#24302) Top

chaotic_iak




Posts: 241
1001002020
Country : Indonesia

chaotic_iak posted @ 2018-02-21 6:41 AM

My first ever podium finish that I can remember, and this is done when I'm half-asleep. Clearly I should do contests while half-asleep. :P
@ 2018-02-21 3:26 PM (#24304 - in reply to #24302) (#24304) Top

prasanna16391



Posts: 1775
1000500100100202020
Country : India

prasanna16391 posted @ 2018-02-21 3:26 PM

chaotic_iak - 2018-02-21 6:41 AM

My first ever podium finish that I can remember, and this is done when I'm half-asleep. Clearly I should do contests while half-asleep. :P


I've come to a similar conclusion recently. I make more mistakes when I'm solving fresh -_- There's probably a weird theory explaining it somewhere even if I can't think of one now.
@ 2018-02-21 3:35 PM (#24305 - in reply to #24242) (#24305) Top

forsmarts



Posts: 33
20
Country : Belarus

forsmarts posted @ 2018-02-21 3:35 PM

Big thanks to all the competitors and congratulations to Endo, Ivan and Kota, who made it to a top-3.
I would also like to thank my co-authors:
Olga Shut, who created all Unknown puzzles and Instructionless Gamma
and Andrey Bogdanov, author of all Triangular puzzles.

Edited by forsmarts 2018-02-21 3:37 PM
@ 2018-02-21 3:43 PM (#24306 - in reply to #24242) (#24306) Top

skrzypl1



Posts: 1

Country : Poland

skrzypl1 posted @ 2018-02-21 3:43 PM

I think that Unknown digits have second possible solution: 1234. Connecting: 1-6, 2-7, 3-5, 3-9, 4-5. Am I wrong?

Also, can we know rules for instructionless puzzles? For example when I solve alpha I get multiple solutions (but proper answer keys nevertheless).

EDIT: I just figured out proper alpha rules that don't give multiple solutions.

Edited by skrzypl1 2018-02-21 4:04 PM
@ 2018-02-21 4:13 PM (#24307 - in reply to #24306) (#24307) Top

forsmarts



Posts: 33
20
Country : Belarus

forsmarts posted @ 2018-02-21 4:13 PM

skrzypl1 - 2018-02-21 3:43 PM
I think that Unknown digits have second possible solution: 1234. Connecting: 1-6, 2-7, 3-5, 3-9, 4-5. Am I wrong?

Seems like you're right :( Confirmed with Olga.
I'll ask an administrator to give full points for this one as well.
@ 2018-02-22 10:22 AM (#24311 - in reply to #24242) (#24311) Top

Ziti



Posts: 42
2020
Country : United States

Ziti posted @ 2018-02-22 10:22 AM

Thank you Vladimir and all your helpers for an entertaining and challenging set of puzzles. I never know how such creative people come up with new puzzle types but I am grateful that you do!

Will there be a solution pdf published? Man oh man I do not see what I did wrong on Gamma -- at least the first one seems like it follows a perfectly unique set of rules.
@ 2018-02-22 4:22 PM (#24314 - in reply to #24311) (#24314) Top

forsmarts



Posts: 33
20
Country : Belarus

forsmarts posted @ 2018-02-22 4:22 PM

Ziti - 2018-02-22 10:22 AM
Will there be a solution pdf published?

I'm sure the solutions will be posted a bit later on a contest page. Meanwhile you can get it from here: https://drive.google.com/open?id=1-WA0Yld3B-L_d-CzrC-nBNj13kdc0eiw
@ 2018-02-22 11:49 PM (#24318 - in reply to #24242) (#24318) Top

tamz29



Posts: 225
10010020
Country : Thailand

tamz29 posted @ 2018-02-22 11:49 PM

Great puzzles and a lot of new ideas!
Is there a way to see the puzzles from the aforementioned Moscow Cup ?
@ 2018-02-23 1:37 AM (#24321 - in reply to #24318) (#24321) Top

forsmarts



Posts: 33
20
Country : Belarus

forsmarts posted @ 2018-02-23 1:37 AM

tamz29 - 2018-02-22 11:49 PM
Is there a way to see the puzzles from the aforementioned Moscow Cup ?

They'll be posted shortly on http://diogenclub.com/, but it will be in Russian.
@ 2018-02-23 5:58 AM (#24323 - in reply to #24242) (#24323) Top

Para



Posts: 315
100100100
Country : The Netherlands

Para posted @ 2018-02-23 5:58 AM

Isn’t this a valid solution for Incorrect Products too?

42513
31452
23145
54231
15324
@ 2018-02-23 6:55 AM (#24324 - in reply to #24242) (#24324) Top

chaotic_iak




Posts: 241
1001002020
Country : Indonesia

chaotic_iak posted @ 2018-02-23 6:55 AM

Para: The 6 is replaced by a 18; that's not a change of one digit.

And to the puzzle: It's a shame to know that Unknown Diginet has multiple solutions. That must be why I was wondering how you can possibly approach this logically.

Edited by chaotic_iak 2018-02-23 6:56 AM
@ 2018-02-23 9:03 AM (#24326 - in reply to #24324) (#24326) Top

Administrator



2000100050020
Country : India

Administrator posted @ 2018-02-23 9:03 AM

Solution Booklet available now.
@ 2018-02-23 10:29 AM (#24327 - in reply to #24324) (#24327) Top

Para



Posts: 315
100100100
Country : The Netherlands

Para posted @ 2018-02-23 10:29 AM

chaotic_iak - 2018-02-23 6:55 AM

Para: The 6 is replaced by a 18; that's not a change of one digit.

And to the puzzle: It's a shame to know that Unknown Diginet has multiple solutions. That must be why I was wondering how you can possibly approach this logically.


Ah, okay. I didn’t really read the rules carefully enough. I just went with, they all work the same as the first, which was one incorrect clue.
@ 2018-02-24 8:36 PM (#24332 - in reply to #24242) (#24332) Top

rob



Posts: 170
100202020
Country : Germany

rob posted @ 2018-02-24 8:36 PM

For beta, also the line has to turn at each dot? Otherwise the example seems not unique.

The alpha rules are nice, unfortunately some Slalom-like rules were too promising for me (no loops, then no crosses: seemed to work fine for the example and the first puzzle, but the second one is contradictory quite late).
@ 2018-02-24 11:56 PM (#24334 - in reply to #24332) (#24334) Top

forsmarts



Posts: 33
20
Country : Belarus

forsmarts posted @ 2018-02-24 11:56 PM

rob - 2018-02-24 8:36 PM
For beta, also the line has to turn at each dot? Otherwise the example seems not unique.

You're right, it should also make a turn at each dot!
rob - 2018-02-24 8:36 PM
The alpha rules are nice, unfortunately some Slalom-like rules were too promising for me (no loops, then no crosses: seemed to work fine for the example and the first puzzle, but the second one is contradictory quite late).

Example is not unique for slalom-like solution, there's one cell that may contain either slash.
@ 2018-02-25 3:46 AM (#24335 - in reply to #24242) (#24335) Top

Ziti



Posts: 42
2020
Country : United States

Ziti posted @ 2018-02-25 3:46 AM

Thank you for the solutions, Vladimir. I solved Gamma as "Path must alternate going through circle-wall-circle-wall..." but did not realize the additional constraint. It solved the example uniquely but obviously not uniquely for the puzzles themselves. Which might explain why I had to guess and was happy (at the time!) to reach a conclusion! :)
@ 2018-02-27 1:25 PM (#24362 - in reply to #24242) (#24362) Top

Eugene Porter



Posts: 11

Country : United States

Eugene Porter posted @ 2018-02-27 1:25 PM

I thought it was a great contest. I did have one question about the incorrect products puzzle. I got an answer of 45213 and 23541 doing this the 36 was the incorrect product. Maybe I am missing something but after checking many times this seems to be a possible alternative solution.
@ 2018-02-27 8:22 PM (#24364 - in reply to #24362) (#24364) Top

forsmarts



Posts: 33
20
Country : Belarus

forsmarts posted @ 2018-02-27 8:22 PM

Eugene Porter - 2018-02-27 1:25 PM
I did have one question about the incorrect products puzzle. I got an answer of 45213 and 23541 doing this the 36 was the incorrect product. Maybe I am missing something but after checking many times this seems to be a possible alternative solution.

The rules say there's just one incorrect digit. If you have a solution with 36 turning into, say, 16 or 35, please share, but I still think the solution is unique.
forsmarts 15th Anniversary contest (2017) - 16th to 19th Feb 201850 posts • Page 2 of 2 • 1 2
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