New Sum Rules of the Koide Type

We report a mass rule of Koide type with inverseshape, \[m_i=M^{(d)} (w_0+w_i)^{-2}.\] It applies to down-quark sector withnumerical precision comparable to that of the directcharged-lepton sum rule $m_i=M^{(l)} (z_0+z_i)^{2}$. For central mass values, Koide ratio reaches exactly $2/3$ near $Q \simeq 280$ TeV under Standard Model renormalisation-group running.We also review other rules of the direct kind involving quarks.