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preusser / q27

27-Queens Puzzle: Massively Parellel Enumeration and Solution Counting
GNU Affero General Public License v3.0
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Q(27) confirmation #6

Open 0xCoto opened 3 years ago

0xCoto commented 3 years ago

An independent confirmation of the result would be great. While Q(26) was confirmed less than two months later by a competing second effort using to Russian supercomputers, it appears more patience is needed this time.

Has your Q(27) solution been confirmed four years later?

preusser commented 3 years ago

The only eager follow-up work I am aware of is the one by the team of Kenji Kise. They published on further optimizing the solver design in 2018. However, rather than confirming the solution count of N=27, they announced to go for N=28 right away. Unfortunately, I cannot find any signs of progress. Also, another Spanish group seemed to have lost interest very quickly in 2017.

So, in brief, I still do not know of any independent confirmation of the result. In fact, I am not even aware of an ongoing effort in this respect.

sudden6 commented 1 year ago

Here we run an independent verification: https://www.rechenkraft.net/yoyo/ using distributed computing on CPUs and GPUs (Software: https://github.com/sudden6/m-queens). The project should finish in the next months and if everything goes well confirm the solution count for N=27.