(A) A = Pi: D_1(Pi, B'_N) * N (should be the constant c, independent of N)
  N=1: N*D1 = 0.10465  margins=True  smear=1.99e-14
  N=2: N*D1 = 0.10466  margins=True  smear=9.96e-15
  N=3: N*D1 = 0.10465  margins=True  smear=6.93e-15
  N=4: N*D1 = 0.10466  margins=True  smear=4.97e-15
  N=5: N*D1 = 0.10466  margins=True  smear=3.91e-15
  N=6: N*D1 = 0.10463  margins=True  smear=3.46e-15
  N=8: N*D1 = 0.10467  margins=True  smear=2.48e-15
(B) random checkerboards A (M x M), N not a multiple of M
  M=2 N=3 rep=0: D1=0.12673  ||H-PH||=0.08333  ||PH-HB||=0.04575 (<= 1/N=0.33333)  margins=True  OK
  M=2 N=3 rep=1: D1=0.10828  ||H-PH||=0.08333  ||PH-HB||=0.04575 (<= 1/N=0.33333)  margins=True  OK
  M=3 N=4 rep=0: D1=0.12992  ||H-PH||=0.11111  ||PH-HB||=0.03281 (<= 1/N=0.25000)  margins=True  OK
  M=3 N=4 rep=1: D1=0.13498  ||H-PH||=0.11111  ||PH-HB||=0.03876 (<= 1/N=0.25000)  margins=True  OK
  M=4 N=6 rep=0: D1=0.06971  ||H-PH||=0.04861  ||PH-HB||=0.02458 (<= 1/N=0.16667)  margins=True  OK
  M=4 N=6 rep=1: D1=0.10599  ||H-PH||=0.08333  ||PH-HB||=0.02559 (<= 1/N=0.16667)  margins=True  OK
  M=5 N=3 rep=0: D1=0.14382  ||H-PH||=0.12143  ||PH-HB||=0.05110 (<= 1/N=0.33333)  margins=True  OK
  M=5 N=3 rep=1: D1=0.21344  ||H-PH||=0.20288  ||PH-HB||=0.06607 (<= 1/N=0.33333)  margins=True  OK
  M=3 N=7 rep=0: D1=0.07833  ||H-PH||=0.06349  ||PH-HB||=0.01945 (<= 1/N=0.14286)  margins=True  OK
  M=3 N=7 rep=1: D1=0.03154  ||H-PH||=0.01862  ||PH-HB||=0.01567 (<= 1/N=0.14286)  margins=True  OK
  M=6 N=4 rep=0: D1=0.22928  ||H-PH||=0.20370  ||PH-HB||=0.05136 (<= 1/N=0.25000)  margins=True  OK
  M=6 N=4 rep=1: D1=0.12635  ||H-PH||=0.12037  ||PH-HB||=0.04358 (<= 1/N=0.25000)  margins=True  OK
  M=7 N=5 rep=0: D1=0.14401  ||H-PH||=0.12695  ||PH-HB||=0.03618 (<= 1/N=0.20000)  margins=True  OK
  M=7 N=5 rep=1: D1=0.14282  ||H-PH||=0.13651  ||PH-HB||=0.03414 (<= 1/N=0.20000)  margins=True  OK
  M=4 N=5 rep=0: D1=0.07919  ||H-PH||=0.06125  ||PH-HB||=0.02807 (<= 1/N=0.20000)  margins=True  OK
  M=4 N=5 rep=1: D1=0.09239  ||H-PH||=0.07500  ||PH-HB||=0.02506 (<= 1/N=0.20000)  margins=True  OK
(C) decay in N for one fixed A (M = 3)
  N=2: D1=0.10165  bound=0.57619  OK
  N=4: D1=0.06152  bound=0.28810  OK
  N=8: D1=0.03134  bound=0.14405  OK
  N=16: D1=0.01595  bound=0.07202  OK
  N=32: D1=0.00801  bound=0.03601  OK
  N=64: D1=0.00402  bound=0.01801  OK
ALL CHECKS OK
