The 10-year-old Ochoa from Bulacan attacked Camachos kingside relentlessly and went on to fashion out a 28-move victory in their Ruy Lopez game, his second straight victory for a 3.04 card after four rounds of play.
NM Oliver Barbosa of Cainta, Rizal blasted Argentinas Fabio Roisman in 35 moves of an English game to likewise post his second win and remain in contention in the 18-under category with 2.5/4 points.
WNM Catherine Pereña of Del Rey School in Caloocan City bounced back from a sorry setback in the previous round as she stunned local bet Belinda Vega Gutierrez in 33 moves of an Orangutan Opening in the girls 16-under class.
Joaquin Banawa, San Bedas top player, likewise outclassed Lithuanias Kestotis Labackao in 31 moves of a French Defense for an even score of 2.0/4 points in the boys 14-under division.
Meanwhile, Youth Team Philippines top bets IM Mark Paragua (boys 18-under), NM John Paul Gomez (boys 16-under) and WIM Arianne Caoili (girls 18-under) settled for draws and remained in the top 10 of their respective age divisions.