Neutrino fluxes obtained for standard solar models and models with opacity increases. Panels (a)–(c): the neutrino fluxes of Φ(7Be), Φ(⁸B), Φ(pp), Φ(pep), and Φ(CNO) = Φ(¹³N) + Φ(¹⁵O) + Φ(¹⁷F) (see Appendix A.3). The squares and the upward and downward pointing triangles show the standard solar models with three calibration constraints (see Appendix A.2), those from Vinyoles et al. (2017), Farag et al. (2020), and this study, respectively. The open circles show our standard solar models with six constraints. The Φ(pep) and Φ(¹⁷F) values are not available in Farag et al. (2020), and thus Φ(CNO) = Φ(¹³N) + Φ(¹⁵O) is used for their models. The blue and red colors indicate the models with low-Z AGSS09 and high-Z GS98 compositions, respectively. The filled circles show our models with opacity increase A₂ (=0, 0.04, 0.08, 0.12, 0.15, 0.18, and 0.22), which is shown by the color, with the size χ², which is ≲0.5 for A₂ ∈ [0.12, 0.18]. The green circles with error bars show the observed constraints (Orebi Gann et al. 2021).