SPACI score report for 1hh6 in ASTRAL 1.73:

PDB Entry: 1hh6
SPACI score: 0.18
AEROSPACI score: 0.18

Experiment type: XRAY
Resolution: 2.6
R-factor: 0.294
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: 1.081
WCK2 WHAT_CHECK Ramachandran: -1.576
WCK3 WHAT_CHECK Chi angles: -1.908
WCK4 WHAT_CHECK Backbone: -6.628

Note: Here are links to pages about PROCHECK and WHAT_CHECK.

Here is the full WHAT_CHECK report on this protein (linked from the WHAT_CHECK site).