All four medals came in the blitz competitions of the event, which is being held across six age groups.
Ramtin Kakavand claimed the gold in the boys’ under-10 contests, with Mohammad-Taha Arkak and Seyyed Kan’an Pourmousavi taking double bronzes in the under-eight and under-12 categories respectively.
In the girls’ competitions, Niousha Mohammadi also settled for a third-spot finish in the under-14 class – a second medal for the Iranian girls in tournament following Rosha Akbari’s under-12 bronze in the rapid event.
Iran is being represented by 13 players in the tournament, which will come to an end on Friday.