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?

Listed all Ps+ Extra games from the easiest and fastest - PlayStation Network - PSNProfiles

TheWhitePony's PSN Profile •

jdh0921's PSN Profile •

Chess Ultra Trophy Guide •

Chess Ultra Trophy Guide & Road Map

Chess Ultra PS VR PS4 - Download

samuel_hsc's PSN Profile •

The Academy Game Pack is a tribute to the long and noble chess playing tradition in Russia that has produced some of the greatest players of all time,

Chess Ultra: Academy Game Pack

Discussion] 0.1% Ultra Rare Rarity Suggestions? : r/Trophies

Server Shutdowns and Unobtainable trophies - General Games Discussion

Winds-of-Neptune's PSN Profile •

Chess Ultra Trophy Guide & Road Map

All PS Now Platinum Trophies List - PlayStation Universe

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