[Retros] Longest search times for SPGs

[Christoph Fieberg]

What are the longest search times for SPG's which are C+?

My personal record for a published SPG is >600 hours on a Pentium IV, 2 
GHz, with Natch (unfortunately exact time not known anymore). Natch showed 
that possibility 1.498.527 from 2.992.046 has a solution which is unique.

http://www.softdecc.com/pdb/search.pdb?expression=PROBID%3D%27P1004298%27

#11655 Die Schwalbe 197 10/2002
2B5/pr2ppKp/2pp1n1n/8/8/2N1P3/PPQP1PPP/R1B3k1 w - - 0 20
SPG in 19.0

As far as I remember Rustam Ubaidullaev solved it in one hour.

Best regards,
Christoph