That left boards three and four to the two higher-rated Canadians, and both delivered. On board four, CM Andrew Yin faced an opposite-castling opening that burned out quickly once the queens came off; White then drifted into a passive defence, could not shake it in the endgame, and Black converted. Both Aiden and Andrew Yin remain on a perfect score after five rounds.
Position of the round
On board three, another Caro-Kann produced the highlight of the round.
Felipe Brunstein Hauyon played 28…Bc4 here, trying to hold on to the bishop, which proved to be the losing move. The correct continuation, 28…fxe5! 29.Nxb5 axb5 30.Rxb5 Qd7, followed by 31…e4, keeps everything under control.
After this erroneous move by Black, Aiden Yin, playing White, found 29.c6!. Following 29…bxc6? 30.b7!, the rook had to retreat to b8. Then, 31.Nxc6 forked the queen on e7 and the rook on b8. A piece up, with a passed pawn on b7 that was later joined by the a-pawn, White converted smoothly to score the decisive point of the match.
Columbus American School beat Creative Kids Learning Academy 3–1 to move into third place, with William Nicolás Rodríguez winning again on board one to maintain his perfect score. Colegio Madre del Divino Pastor beat Harrison College School 2½–1½, with Jasmany Shallom Castillo Romero defeating AIM Jeremiah Farley on the top board, and Charis Stuart losing for the first time, ending the last perfect score for a Barbadian player. Colegio Celta Internacional beat The Oxford School by the same margin, with CM Fernando Cortes Medina winning his fifth game out of five.
The best result for the hosts came further down the hall, where Colegio Bilingüe San Francisco de Asís swept Escuela Internacional Sampedrana 4–0, marking the first clean sweep by a Costa Rican school all week. Colegio Humboldt drew 2–2 with Red Bay Primary School, and the British School lost 1½–2½ to Martin Klein Schiller. St. Kitts International Academy, which had not won a match since joining the event, beat Projeto Vidançar 2–0.
Round 6