PS+ Required? - Chess Ultra - PSNProfiles

Can anybody tell me if this game requires PlayStation Plus in order to unlock any of the online trophies (even the ones that can be boosted using multiple accounts) or can the platinum be achieved without it?

Synergys Platinday or how to reach 500 Platins in 24 hours - Trophy Checklists - PSNProfiles

Server Shutdowns and Unobtainable trophies - General Games Discussion

CaptainSellers' PSN Profile •

Chess Ultra: Academy Game Pack

unweyshido345678's PSN Profile •

Tennis On-Court Trophy List out on PSN Profiles : r/PSVR

Chess Ultra: Academy Game Pack

Chess Ultra Trophy Guide •

rmhook's PSN Profile •

Chess Ultra Trophies •

Death's Door] I enjoyed it so much the first time I did it again with the PS4 version. : r/Trophies

PlayStation Plus Extra/Premium Games List - PlayStation Network - PSNProfiles

Chess Ultra Trophy Guide •