SPACI score report for 3chb in ASTRAL 1.57:

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: 1.074
WCK2 WHAT_CHECK Ramachandran: 1.229
WCK3 WHAT_CHECK Chi angles: 1.111
WCK4 WHAT_CHECK Backbone: 0.197

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).