England women defeated Ireland by six wickets in the first One Day International at the Uptonsteel County Ground, Leicester, securing their highest chase of 282 runs in the format.
The visitors reached 72-0 after powerplay before Maia Bouchier added 143 for the first wicket with Sophia Dunkley, who contributed a 47-ball fifty to reach 73 not out.
Bouchier struck 104 off 95 balls to guide England home, though she was dismissed caught at long-on following a moment of concentration lapse.
Ireland posted 281-5 in their allotted 50 overs with half-centuries for captain Gaby Lewis on 69, Amy Hunter on 62 and Rebecca Stokell on 54 not out from 48 deliveries.
Alice Capsey and Freya Kemp formed a quickfire partnership of 54 runs off 38 balls to put England within striking distance, with Capsey hitting the winning boundary to finish unbeaten on 41.
The English batting line-up featured five players who missed from the squad that started the World Cup semi-final last year, including the absence of injured captain Nat Sciver-Brunt.
Head coach Charlotte Edwards is building towards next summer's Ashes with places up for grabs in the top order following the retirements of Heather Knight and Tammy Beaumont.
England's bowling attack lacked threat in the middle overs without Lauren Bell and Sophie Ecclestone, who were rested during the match.
Ireland earlier impressed with the bat despite being poor with the ball and sloppy in the field throughout the contest.