  structured delta=0.15: min T* +0.04876
  structured delta=0.20: min T* -0.00978
  structured delta=0.25: min T* -0.05270
  structured delta=0.30: min T* -0.03163
  structured delta=0.35: min T* +0.12662
BW=1.4142 k=4: min T*(2) = -0.052698 (block d=0.25 a=0.8); depths [0.25 0.25 0.25 0.25]; pair parts [0.153 1.048 1.975 2.872]; near [-2.87 -2.87 -1.85 -1.85 -0.77 -0.77  3.8   3.8   4.88  4.88  5.84  6.89]
   starts 35, fraction below 0: 0.23, below -1e-3: 0.23
