West Indies 257 for 8 (Powell 101, Holder 54, Murtagh 4-41) beat Ireland 205 (Joyce 63, K O'Brien 38, Roach 4-27, Williams 4-43) by 52 runs
Harare: Rovman Powell's century helped West Indies defeat Ireland by 52 runs to secure a Super Six spot at the World Cup qualifier series in Zimbabwe.
Powell's 101 saw West Indies recovering from 83-5 with captain Jason Holder hitting 54 as they reached 257-8.
Ireland regrouped from 32-3 to move to 166-4 but the departures of Ed Joyce (63) and Kevin O'Brien (38) in the 37th over put West Indies in control.
The Irish will book a Super Six spot by beating United Arab Emirates on Monday.
The two top after the Super Sixes will qualify for next year's World Cup in England and Wales.
In addition to Powell's century, Kemar Roach's bowling was hugely important to West Indies' win as his figures of 4-27 included the vital wickets of Joyce and Kevin O'Brien.
Kesrick Williams also took four Irish wickets including the dismissal of skipper William Porterfield for a duck.
Coming in at number seven, with his team 83-5 having been 58-4, Powell hit seven fours and seven sixes in a superb 100-ball innings.
Powell put on 86 with captain Holder and 60 with tail-ender Ashley Nurse before holing out with two balls remaining.
Tim Murtagh produced impressive bowling figures of 4-41 with spinner Andy McBrine also taking two dismissals but the Irish were left to rue a couple of dropped catches.
In Ireland's reply, Roach dismissed Paul Stirling and Andrew Balbirnie after Porterfield's duck to leave the Irish struggling on 32-3.
Joyce's 63-run partnership with Niall O'Brien steadied the Irish innings before the wicket-keeper holed out near the boundary to Evin Lewis off a Williams delivery for 34.
A repeat of Ireland's World Cup 2015 win over the Windies looked possible as Joyce and Kevin O'Brien scored freely but Roach dismissed both of them in the 37th over as Ireland were eventually dismissed for 205 in the 47th over.