Windies' opening batsmen Kraigg Brathwaite and John Campbell got off to a solid start, nearly putting up a half-century stand for the first wicket.
Handling New Zealand's pacemen with sound technique and maturity, the openers ensured West Indies remained unscathed by day end. Trailing by 470 runs, they have a huge task ahead but will be pleased with how the first leg of the battle panned out.
Brathwaite was his usual self, dropping anchor, digging in, while Campbell followed suit with an equally cautious knock.
However, it was Williamson's day through and through as the Black Caps captain smashed his third double ton in Tests. He began the day slowly but picked up speed eventually to expertly tackle whatever was thrown at him.
While wickets fell at one end, Williamson held onto the other with resolve. He got to his century in the third over of the day, slowly upping the scoring rate after reaching the three-figure mark.
The West Indies bowlers didn't do much wrong. Kemar Roach bowled with verve, producing several testing deliveries but Williamson held his own despite missing a few. At the other end, Ross Taylor departed on 38, after edging one off Shannon Gabriel. Roach dismissed Henry Nicholls on 7 as he got a thick outside edge to Jason Holder at second slip.(UN)
