SPACI score report for 3chb in ASTRAL 1.69:

PDB Entry: 3chb
SPACI score: 0.82
AEROSPACI score: 0.82

Experiment type: XRAY
Resolution: 1.25
R-factor: 0.1326
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 4.897
WCK2 WHAT_CHECK Ramachandran: 0.86
WCK3 WHAT_CHECK Chi angles: 0.222
WCK4 WHAT_CHECK Backbone: -2.964

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).