[size=17]Stockfish 1.9:[/size]
Single Core



https://sites.google.com/site/strategictestsuite/test-results---sts-1---12-2/test-results---sts-1---12
[color=blue]1200 Positions
10 seconds per position
Hardware: Q6600, 32 bits, 2 GB RAM, 2.4 GHZ. Arena 2.01 GUI.[/color]

Huge Improvement in STS 7 -- "Offer of Simplification" (+11)
Great Improvement in STS 9 -- "Advancement of a/b/c Pawns" (+9)
Some Improvement in STS 3 -- "Knight Outposts/Centralization/Re-positioning" (+4)

[size=17]Stockfish 1.8[/size]:
Single core



Best wishes,
Swami