D = 12, tau_e = 1.0; columns: true E|Z_K|, whole-law V_D, split over all edge atoms (exact shifts), chord split (edge jump law replaced by its two-point chord law; proof-shaped)
RQ-B no-window rest                true 0.76650  V_D 0.85282  split 0.80385  chord 0.80446
edge spread 4 atoms + G            true 0.77490  V_D 0.84992  split 0.81216  chord 0.81407
edge spread + small atoms          true 0.77565  V_D 0.85001  split 0.81068  chord 0.81242
F maximiser (RQ-C C18)             true 0.82666  V_D 0.84997  split 0.82676  chord 0.82705
RQ-A 18:53 obstruction             true 0.79658  V_D 0.85833  split 0.80554  chord 0.80554
RQ-A edge y=1.2, w=0.055           true 0.79671  V_D 0.85409  split 0.80653  chord 0.80702
two-sided spread                   true 0.72590  V_D 0.83496  split 0.74360  chord 0.74640
0.3 d1.4 + 0.3 d0.7 + 0.4 G        true 0.78524  V_D 0.84485  split 0.82634  chord 0.82821
spread 0.6 on [1.2,1.54] + 0.4 G   true 0.77799  V_D 0.84260  split 0.79921  chord 0.80229
