Part-time off-spinner Roston Chase has taken eight second-innings wickets as the West Indies crushed England by 381-runs in the first Test in Barbados.
Chase, given the chance to shine in the absence of a specialist spinner in the line-up, seized the opportunity with a career-best haul of 8-60 at Kensington Oval in Bridgetown.
"Credit to Roston, he was patient and got the ball in the right areas," Windies captain Jason Holder, named man of the match for his double ton, said.
West Indies, rank underdogs in the series, bowled England out for 246 in the second innings and won with more than a day to spare.
Starting the day at 0-56, England's top-order batsmen all got starts but only opener Rory Burns (84) turned it into a big score as they capitulated from 4-215 to be all out less than an hour after tea.
Statisticians reached for the record books to put the result into historic perspective, revealing only two occasions when the Windies won by bigger margins by runs.
They defeated England by 425 runs in Manchester in 1976 and dusted Australia by 408 runs in Adelaide in 1980.
Chase, who came into the match with a Test bowling average of more than 47, flighted the ball well but was aided by some poor shots by the England batters.
England will look back in horror at their latest visit to Bridgetown, having been rolled over for 77 in the first innings and spending almost an entire wicketless day failing to break a record 295-run seventh-wicket partnership - in which Holder scored 202 not out and Shane Dowrich 116.
England captain Joe Root acknowledged his men were well below-par as they suffered just their second defeat in their last 10 Tests.
"I'm bitterly disappointed. We're a far better side than we played this week and we've got to keep remembering how well we have played of late," he said on Sky Sports.
"The one thing I have to say is: fair play to the West Indies, they played extremely good cricket throughout the four days and they deserve a lot of credit."
Holder warned that the result, though welcome, was only one match.
"We've still got a long way to go. One test match doesn't make a summer," he said.
"We've been in this position before, so lots of hard work to be done."
The second Test in the three-match series starts on Thursday in North Sound on the island of Antigua.
