The West Indies openers made a dent in the Black Caps' first-innings total late on day two at Mount Maunganui.
The home side's dominance over the West Indies bowling attack continued from the opening day of the test, before New Zealand declared less than an hour after the tea break at 575 for eight.
In reply, the West Indies were 110 without loss at stumps, with John Campbell (45) and Brandon King (55) not only surviving but thriving in the latter part of the last session, rattling along at 4.78 runs an over.
The Black Caps called on four bowlers to close out the day; with pace dispatched by the visitors, spinner Ajaz Patel looked like the more promising option, and could play a big role on day three.
New Zealand started the day on 334 for one and, after serving his duty as nightwatchman, Jacob Duffy was the first wicket to fall for 17 to Jayden Seales, bringing Kane Williamson to the middle after a 93-over wait to bat.
Devon Conway reached his second test double-ton from 318 balls and, soon after, brought up the 50-run partnership with Williamson and the team's total of 400 with the same stroke.
Justin Greaves found Williamson's edge and he was caught behind for 31.
After a dominant first session of the day, in which the Black Caps scored 90 runs for two wickets, they were 424 for three at lunch.
Conway was dismissed leg before wicket to Greaves in the fourth over after lunch for 227, his highest test score.
It was Conway's second three-figure score in eight innings in 2025; he spent 508 minutes at the crease.
No 6 batter Daryl Mitchell had a short stay, gone for 11, and returning wicketkeeper-batter Tom Blundell only scored four before he was caught behind off the bowing of Seales. At tea, the hosts were 508 for six.
Rachin Ravindra and Glenn Phillips brought up a 61-run partnership for the seventh wicket, before Phillips was caught in the slips for 29.
Ravindra was on 72 when captain Tom Latham called them in, after Patel had inflated the score a little further at the end with a tidy unbeaten cameo of 30 at a run a ball.
The first ball of day three is scheduled for 11am.
NEW ZEALAND V WEST INDIES
NEW ZEALAND (1st innings)
T Latham (c) c Chase b Roach 137
D Conway lbw b Greaves 227
J Duffy c †Imlach b Seales 17
K Williamson c †Imlach b Greaves 31
R Ravindra not out 72
D Mitchell c †Imlach b Chase 11
T Blundell † c †Imlach b Seales 4
G Phillips c Chase b Phillip 29
Z Foulkesb Phillip 1
A Patel not out 30
Extras (2b, 2lb , 2nb , 10wd):16
Total (in 155 overs, for 8 wickets dec): 575
Fall of wickets: 1-323, 2-350, 3-419, 4-432, 5-455, 6-461, 7-522, 8-536.
Bowling: K Roach 19 overs, 3 maidens, 63 runs, 3 wickets; J Seales 33-4-100(2wd)-2; A Phillip 29-4-154(1nb)-2; J Greaves 29-4-83(1wd)-2; R Chase 44-1-159(1wd,1nb)-1; K Hodge 1-0-12-0.
WEST INDIES (1st innings)
J Campbell not out 45
B King not out 55
Extras (wd 10):10Total (without loss in 23 overs): 110
Bowling: J Duffy 9-0-37(1wd)-0; Z Foulkes 6-0-39(1wd)-0; M Rae 4-0-25-0; A Patel 4-0-9-0.
New Zealand lead by 465 runs.
— RNZ
— additional reporting Allied Media
