Main stages of the evolution of the binary system leading to the currently observed PSR J1614−2230, accompanied by a 0.5 M_⊙ WD (detailed description in Sect. 2.1). A – main sequence stage; B – common envelope stage (secondary inside the primary); C – the primary becoming a He star; D – core-collapse supernova explosion of the primary; E – intermediate-mass X-ray binary stage, with a very strong mass loss; F – LMXB, NS recycling stage via accretion disk, secondary mass loss via RLO; G – current state, wide binary MSP+WD.