Yannaphon, who had already made the finals in eighth position in the overseas pool with a moderate 1237, improved his lower 605 3-games series with a stunning 720 to take his 6-games tally to 1352.
His superb effort made him the second Thai to lead the standings after PBA-WBT Busan Cup champion, Annop Arromsaranon had led with 1321. 2018 Philippines Open first runner-up, Mike Chan of Hong Kong had led briefly with 1322 only to find 2018 Macao-China Open fourth runner-up and compatriot, James Lui moving into the lead with 1345.
But Lui's lead was also short-lived with Yannaphon claiming pole position. Annop slipped out of the top 3 bracket while a third Thai and last year's ABF Tour winner, Atchariya Cheng completing the top 5 with 1289.
2018 ABF Tour Thailand leg champion, Lai Pai-Feng remained unchallenged in the local pool with 1347. 2017 World Championships All Events gold medallist, Wu Hao-Ming made numerous attempts to eventually moved into second position with 1328.