sudoku@vtaiwan

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rebirther
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sudoku@vtaiwan

#1 Post by rebirther » 18.09.2010, 15:15

http://sudoku.nctu.edu.tw/

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For sudoku@vtaiwan, we developed new techniques and used them to modify the program Checker (written by Gary McGuire). We successfully reduced the total expected computation time from 300,000 years per core to 2,417 years per core. This makes it more feasible and reasonable to use BOINC to solve Sudoku.
Last edited by rebirther on 14.01.2011, 15:07, edited 1 time in total.

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#2 Post by rebirther » 04.11.2010, 05:18

Dear Rebirther:

We really appreciate your participation in vtaiwan and thank you for all sugguestions.
Now the Building of Q&A part is in progress, we'd like to release this part as soon as possible.
We will also post the credits info to boincstats.com in future.

Thank you very much for the participation and sugguestions.
If you have any problem about vtaiwan, please let us know.

--
vtaiwan team
Yu-Wei Chen
Bald gibts ein Forum und Stats!

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#3 Post by rebirther » 17.11.2010, 13:51

Ist jetzt bei BOINCstats drin.

Das Projekt führt die Berechnungen mit Doublecheck durch, d.h. alles wird 2x durchlaufen.

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#4 Post by rebirther » 12.01.2011, 20:31

Datenbank wurde gelöscht, Gründe bisher keine. Hoffentlich wird die alte wieder hergestellt.

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#5 Post by rebirther » 14.01.2011, 15:10

Hmm, Email scheint doch angekommen zu sein, nun zur Meldung:
Dear all volunteers, our sudoku@vtaiwan system crashed around Jan 3rd, 2011. We would like to apologize to you all for the crash.

We have recovered our system. However, we still lost the login record of volunteers, including account/password, though we backup the credits of all volunteers. Since we cannot but reset the volunteer credit system, we need your help to restore your credits as follows.



1.Detach the old "sudoku@vtaiwan" project entry (in the projects folder), and then
2.attach new project "http://sudoku.nctu.edu.tw" project as a "new user", but remember to use the same name.


As long as you can register with the same name as before, we can restore your credits by adding the current saved credits back to the new system later.

Sorry for any inconvenience. And thank you very much for your continuous support.

Sudoku@vtaiwan TeamThis e-mail address is being protected from spambots. You need JavaScript enabled to view it , January 14th, 2011.
Man muss sich mit den neuen gleichen Daten anmelden + am Projekt anmelden, danach sollten die Credits wieder gutgeschrieben werden. Links sind oben wieder aktuell.

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#6 Post by rebirther » 17.01.2011, 14:48

Checkt mal eure Credits ob alles wieder hinhaut! Bei mir sind die korrekt.

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#7 Post by diclo » 18.01.2011, 04:57

Bei mir stimmt auch alles. Nochmal Glück gehabt :good:

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#8 Post by rebirther » 09.09.2013, 05:04

Dear all volunteers,

We are happy to announce that this BOINC project (sudoku@vtaiwan) ends with no 16-clue Sudoku puzzles found, on September 5, 2013, after running about 2 years and 8 months. The result confirms that obtained by McGuire: The minimum Sudoku problem is solved. We would like to express our gratitude to the community for contribution to this project; we could not finish it without your enthusiasm and support.

The total credit (in BOINC) is 732,404,168, equivalent to 3296.5 core-year, more than our early estimation, 2413 core-year. The difference could be due to the following reasons:
Some credits were added back, after we encountered a crash on Jan 3, 2011. Note that the project actually started on October 27, 2010. For the crash, we restarted it from January 3rd, 2011.
Some other overhead.
The total number of registered participants is 31129, and the total number of participants who have contributed is 4378.

The top 20 contributors are listed here, and the top 20 teams are listed here. Some of them whose teams or organizations are not clearly identified are outlined as follows.
The accounts "stanleylin", nchcalps, "david", "syhan", "c00ctn00" are from the computing resources of NCHC (National Center for High-performance Computing, Taiwan).
The account "Hicloud@cyc" is from the computing resources of HiCloud (Chunghwa Telecom, Taiwan).
After this project ends, we do have plans for our next projects or volunteer projects, e.g., "go@vtaiwan", which aims to solve 7x7 Go or 9x9 Go positions. Note that the game-tree complexities of 7x7 Go are about 10^47, between Checkers (10^31, solved in 2007) and Othello (10^58, not solved yet). However, they are not yet ready at this moment. When ready, we will release details regarding the new project. We would also deeply appreciate your continued support for new projects in advance.
Thank you very much.
The team from sudoku@vtaiwan
2013/9/6

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