mersenneforum.org  

Go Back   mersenneforum.org > Fun Stuff > Puzzles

Reply
 
Thread Tools
Old 2021-09-02, 11:05   #1
Xyzzy
 
Xyzzy's Avatar
 
Aug 2002

831010 Posts
Default September 2021

https://www.research.ibm.com/haifa/p...ember2021.html
Xyzzy is offline   Reply With Quote
Old 2021-09-07, 14:07   #2
dg211
 
Jun 2016

11 Posts
Default

I'd be interested to see what the best values people can find are. My best solutions so far are 40 and 149.
dg211 is offline   Reply With Quote
Old 2021-09-13, 09:57   #3
Dieter
 
Oct 2017

112 Posts
Default

Quote:
Originally Posted by dg211 View Post
I'd be interested to see what the best values people can find are. My best solutions so far are 40 and 149.
That are very good values. I'm happy to have found a 50-solution this morning - too late for being listed.
It's consoling for me that there are not many solvers until 11/09.
I have no code producing a complete solution, but only codes optimizing versions found with pencil and paper.
Dieter is offline   Reply With Quote
Old 2021-09-13, 10:12   #4
dg211
 
Jun 2016

11 Posts
Default

Yeah, I think this is one of the toughest puzzles there has been recently.

I slightly improved the bonus solution to 147, but I'm still on 40 for the first part.
dg211 is offline   Reply With Quote
Old 2021-09-13, 18:10   #5
Kebbaj
 
Kebbaj's Avatar
 
"Kebbaj Reda"
May 2018
Casablanca, Morocco

2×47 Posts
Default

I'm blocked at 54 damage. Normal pencil and paper cannot give a solution easily.
I only want to abandoned. So Difficult question!!

[8976 "," 4238 "," 8297 "," 4735 "," 3279 "]
31415926535897932384626433832795028841971693993751058209749445923078164
3-2-79-4735897642384735423832793-2798-97-68297473--582-9747354753-89-76
54 damage.

This solution does not spoil the challenge, it's blocked at 54.We have to start at the beginning, if we want another winning solution. But it can help!

Last fiddled with by Kebbaj on 2021-09-13 at 18:13
Kebbaj is offline   Reply With Quote
Old 2021-09-13, 18:36   #6
dg211
 
Jun 2016

11 Posts
Default

Remember you can use hyphens in both strings.

I'm impressed people managed to get solutions that good with pen and paper, I didn't even try that approach because I thought it would be too hard.
dg211 is offline   Reply With Quote
Old 2021-09-13, 20:12   #7
Kebbaj
 
Kebbaj's Avatar
 
"Kebbaj Reda"
May 2018
Casablanca, Morocco

2×47 Posts
Default

Quote:
Originally Posted by dg211 View Post
Remember you can use hyphens in both strings.

I'm impressed people managed to get solutions that good with pen and paper, I didn't even try that approach because I thought it would be too hard.
I am also impressed by the strength of formalizing the question and being able to code it. A question not easy to formalize.
But there, I'am obliged to get help with the calculation.
There are 1680 possible permutations from 2 to 9 for each quadruplet. I leave the 0's and 1's, they don't do a lot of damage.

Congrats, for this impressed solution 40 and 147.
Kebbaj is offline   Reply With Quote
Old 2021-09-14, 05:39   #8
Dieter
 
Oct 2017

12110 Posts
Default

Quote:
Originally Posted by Kebbaj View Post
I'm blocked at 54 damage. Normal pencil and paper cannot give a solution easily.
I only want to abandoned. So Difficult question!!

[8976 "," 4238 "," 8297 "," 4735 "," 3279 "]
31415926535897932384626433832795028841971693993751058209749445923078164
3-2-79-4735897642384735423832793-2798-97-68297473--582-9747354753-89-76
54 damage.

This solution does not spoil the challenge, it's blocked at 54.We have to start at the beginning, if we want another winning solution. But it can help!
Your last 4735 has changed to 4753 ("Zahlendreher"), but without consequences for the damage.
Dieter is offline   Reply With Quote
Old 2021-09-14, 09:49   #9
Kebbaj
 
Kebbaj's Avatar
 
"Kebbaj Reda"
May 2018
Casablanca, Morocco

2·47 Posts
Default

Quote:
Originally Posted by Dieter View Post
Your last 4735 has changed to 4753 ("Zahlendreher"), but without consequences for the damage.
"Unaufmerksamkeitsfehler" "خطء فني"
Well seen this Permutation typing error without consequences for the damage. Thanks Dieter!
Question:
Can we find less than 54 damage without any pulling on the sequance pi?
**
Congrats Dieter, for solving with the manual "to tear out"!

Last fiddled with by Kebbaj on 2021-09-14 at 10:07
Kebbaj is offline   Reply With Quote
Old 2021-09-14, 14:48   #10
Kebbaj
 
Kebbaj's Avatar
 
"Kebbaj Reda"
May 2018
Casablanca, Morocco

10111102 Posts
Default I'm stubborn as a mule!

Finally, I had score 50, with a lot of damage to my neurons !!
Nice Challenge sept 2021.

I can go to work now!!
Liberation!
Kebbaj is offline   Reply With Quote
Old 2021-09-14, 15:33   #11
kruoli
 
kruoli's Avatar
 
"Oliver"
Sep 2017
Porta Westfalica, DE

661 Posts
Default

Quote:
Originally Posted by Kebbaj View Post
"Unaufmerksamkeitsfehler"
Personally, I never heard that word. But as always with German compound words, it is understandable. I'd suggest "Flüchtigkeitsfehler", which of course is slightly different, literally, but more about what you wanted, I think.
[/PEDANTIC]
kruoli is online now   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
September 2020 tgan Puzzles 33 2020-10-12 03:06
September 2019 Xyzzy Puzzles 10 2019-10-08 13:47
September 2018 Xyzzy Puzzles 2 2018-10-11 15:31
September 2017 R. Gerbicz Puzzles 21 2018-03-17 13:19
Anyone going to Vienna in September? fivemack Factoring 1 2007-09-07 00:29

All times are UTC. The time now is 19:18.


Fri Oct 22 19:18:07 UTC 2021 up 91 days, 13:47, 0 users, load averages: 1.72, 1.64, 1.61

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.