Veteran left-hander ShivnarineChanderpaul hit 108 and wicketkeeper Denesh Ramdin added 86 as West Indiesstretched its lead over Zimbabwe to 206 at close of play on the second day ofthe second and final test on Thursday.
The hosts, replying to Zimbabwe's modest first-innings totalof 175, were 381-8 at stumps at Windsor Park.
The 38-year-old Chanderpaul was typically obstinate as hestruck 13 fours, reaching his century off 246 balls before later being caughtby Sean Williams off a delivery from offspinner Prosper Utseya.
Earlier, opener Chris Gayle completed his 15th test centurybefore falling for 101, caught by Kyle Jarvis off Utseya, who finished withZimbabwe's leading bowling figures of 3-60.
Ramdin took 10 runs off the first over after lunch frompacer Jarvis but Zimbabwe's bowlers were disciplined for the most part in thesecond session without taking a wicket.
Chanderpaul brought up his half century, his 89th score of50-plus in tests, off 121 balls with his seventh boundary.
An hour later, Ramdin followed him to the milestone, hissecond straight half century occupying 96 balls.
Jarvis, who struck twice with the new ball onday one, finished with figures of 2-82 while Graeme Cremer also chipped in witha couple of wickets (2-102).