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?

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

Chess Ultra Trophy Guide •

TheWhitePony's PSN Profile •

Chess Ultra Trophy Guide - Comments •

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

Chess Ultra Trophies •

Chess Gambit Trophies •

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

Chess Ultra Trophies •

Review: Chess Ultra (Sony PlayStation 4) – Digitally Downloaded

EiichiHoba's PSN Profile •

Chess Ultra Trophies •