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Rassolini is bred by Horst Hofmann and is by Rubioso N out of Sweetheart (by Silvano N). 

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He was initially started by Klarissa-Alexandra Liss, who rode him to an 8th place at the 2006 Bundeschampionate as a 3-year old. Owned by Detlef Ruddat and competed by Kathrin Meyer zu Strohen since 2008, Rassolini went to the 2008 World Young Horse Championships in Verden and the Bundeschampionate Finals in Warendorf, where he finished fourth at both events.

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In 2010 they won the Nurnberger Burgpokal Finals for Developing Prix St Georges horses at the 2010 CDI-W Frankfurt. In June 2012, Meyer zu Strohen and Rassolini made their national Intermediaire II debut at Isernhagen.

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In December 2013, Vantage Equestrian Group, a syndicate of 10 people around investors Ann Romney, Beth Meyer and Amy Ebeling, acquired Rassolini as the successor for Jan Ebeling's 2012 Olympic mount Rafalca and his new 2016 Rio hopeful. Ebeling and Rassolini made their international Grand Prix debut in 2014, and Ebeling last competed him at the CDI Del Mar in April 2017. 

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In January 2018 the horse sold to Christina Morgan as young rider horse for Christian Simonson, who at that time was a 2017 North American Junior & Young Riders Championships team gold, individual silver and freestyle bronze medalist. The new duo made its CDI debut in March 2018 in Del Mar and went to the 2018 North American Young Riders Championships, where they were 6th in the team test and won the team silver medal.

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In August, 2019, Rassolini moved to his new home in California, where he retired from competition and stands at stud at Peridot Equestrian Center.

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