England were frustrated by Kraigg Brathwaite's composed century as West Indies had the better of the fourth day of the second Test in Grenada.
His 101 not out took the home side to 202-2, a lead of 37.
Earlier, England moved their overnight 373-6 to 464 all out, with Joe Root ending unbeaten on 182.
On a pitch that remains lifeless, a draw seems the most likely result, lengthening England's wait for a first overseas win since 2012.
A young man's game
At 24 years and 115 days, Joe Root is the second youngest Englishman to reach 2,000 Test runs, after Alastair Cook, who was 23 and 79 days.
Kraigg Brathwaite, at 22 years and 144 days, is the third youngest West Indian to reach four Test centuries, after George Headley and Gary Sobers.
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