Australia played New Zealand in their Champions Trophy opener where the Kiwis posted a total of 291 after the match was reduced to 46 overs-a-side after a downpour.
Electing to bat first, New Zealand made a solid start to their innings before opener Martin Guptill was dismissed by Josh Hazlewood for 26.
Josh Hazlewood was the pick of the Australian bowlers, finishing with 6-52, but Smith was unhappy with what was sent down for the first 40 overs as Kane Williamson scored a fine century before his run out for 100 sparked a stunning late collapse.
Williamson, who played the second fiddle till Ronchi was at the crease, then took the onus on himself to guide New Zealand's innings and together with Ross Taylor (46) played aggressively to share 99 runs in just 18.1 overs for the second wicket.
Crowd catches are always pretty special and this one is no different from Australia's washout Champions Trophy match against the Black Caps.
But further rain during the mid-innings break left Australia with a tough new target under the Duckworth-Lewis-Stern method for weather-affected limited-overs matches. Boult at No11 was his one classical wicket - caught behind to make it three in four balls at the end - as he became just the second bowler in the history of the Champions Trophy to take six.
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The day began well enough with New Zealand batting first after winning the toss, a counter-intuitive act in these days of bruising hitters but not for them.
It's expected to be a nail-biting match as both teams are considered tough contenders with some exciting and multi-talented players. We gave them a lot of freebies.
The top two in each of the two groups of four will go forward to the semi-finals.
"Jeetan Patel certainly has plenty of local knowledge and he says they produce the wickets the same way for County cricket and internationals, so he's certainly got some good insights for us".
Winless in an ODI at Edgbaston since 1993, with four of the past eight matches in Birmingham washed out, Australia was well behind par on the Duckworth Lewis system by the end of the eighth over.
Australia: A Finch, D Warner, S Smith (capt), M Henriques, T Head, G Maxwell, M Wade, J Hastings, P Cummins, M Starc, J Hazlewood.
In his first global outing since he returned home early from India in March with a foot injury, the dynamic left-armer, who averages fewer than 20 runs per wicket in his ODI career, looked threatening but meandered through his final overs and went wicketless.