In December 2018, Vrolijk tied for first place with grandmaster Ottomar Ladva in the Groningen Chess Festival.

[2] Vrolijk lost the championship to Ladva on tiebreaks, though defeated grandmaster Roeland Pruijssers in the final round.

[3] In February 2021, Vrolijk tied for 13th place with a score of 8.5/11 in the Titled Tuesday Blitz tournament.

[4] At the event, he managed draws against higher-rated players Mustafa Yılmaz and Rudik Makarian.

[1] Vrolijk competed in the Challengers section of the Tata Steel Chess Tournament 2024, where he defeated higher-rated grandmasters Leon Luke Mendonca and Mustafa Yılmaz.