SPACI score report for 1b18 in ASTRAL 2.08:

PDB Entry: 1b18
SPACI score: 0.5
AEROSPACI score: 0.5

Experiment type: XRAY
Resolution: 1.8
R-factor: 0.183
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -2.86
WCK2 WHAT_CHECK Ramachandran: -3.018
WCK3 WHAT_CHECK Chi angles: -1.433
WCK4 WHAT_CHECK Backbone: -2.067

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).