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?

CaptainSellers' PSN Profile •

Chess Ultra Trophy Guide and Roadmap - Chess Ultra

oIMyersIo's PSN Profile •

Chess Ultra] Pushed my boosting skills to the limit I wish I didn't suck so much at chess : r/Trophies

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

harshwah's PSN Profile •

Chess Ultra Trophy Guide •

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

Chess Ultra Trophies

Server Shutdowns and Unobtainable trophies - General Games Discussion

PS+ Required? - Chess Ultra - PSNProfiles

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