x11= 1/20  km= 133/160  completable: False
x11= 1/4  km= 21/32  completable: True
x11= 9/20  km= 391/480  completable: False
x11=0: zero lemma (row1/col1 pinned) -> not completable
x11= 1/2  km= 55/64  completable: False
completable x11 range approx: 0.08408950000000001 0.280065
x11=0.05: min sup-distance from random image points = 0.0088
x11=0.25: min sup-distance from random image points = 0.0017
x11=0.45: min sup-distance from random image points = 0.0160
x11=0.05: min over grid with x12,x21 matched exactly = 0.0132
x11=0.25: min over grid with x12,x21 matched exactly = 0.0000
x11=0.45: min over grid with x12,x21 matched exactly = 0.0200
