De or het schaakolympiade?

The correct Dutch article is:

de schaakolympiade

Rule Words ending in -ade: always de. See the rule

How to use schaakolympiade

the schaakolympiadede schaakolympiade
this schaakolympiadedeze schaakolympiade
that schaakolympiadedie schaakolympiade
our schaakolympiadeonze schaakolympiade
your schaakolympiadejouw schaakolympiade
every schaakolympiadeelke schaakolympiade
which schaakolympiade?welke schaakolympiade?
a big schaakolympiade / the big schaakolympiadeeen grote schaakolympiade, de grote schaakolympiade