New test set 'pure'

[sarona]

from Mr. Dann Corbit

New test set 'pure'
This test set is composed of 6 files:
1) culls.epd Culls are problems which are from another problem, farther towards the end of a PV (so they are already in the set)
2) culls-ana.epd Culls-ana is the culls problem set with analysis

While the culls files are redundant, they are still interesting, perhaps and some are fairly difficult

3) duds.epd Duds are problems that were too easy to solve (less than two seconds with 30 cores using a recent version of SF)
4) duds-ana.epd Duds-ana is the duds problem set with analysis.

The duds problems are too easy for modern computers unless you want to run at one seceond per problem or something like that. But it might be a nice set for cell phones.

5) pure.epd Pure contains the problems left after removing the culls and duds.
6) pure-ana.epd Pure-ana contains the pure problem set with analysis

The pure set varies from fairly easy to solve to extremely difficult to solve.
https://drive.google.com/file/d/1e42RYe6L_vM0QuYDlc6mxxDFoGYiIjxG/view?usp=share_link