Htaccess Redirect if url conatin Brackets [ ]

[Lotanas]

Hello,
i wanna redirect this link :
http://domain.com/main2.php?t202id=2483&mnin=pubd&t202kw=[zone]

to http://domain.com/newpage.php

but only if the visitor hit the url with [zone] in the end of the url and in case he visit an url

like this for example http://domain.com/main2.php?t202id=2483&mnin=pubd&t202kw=XXXXXXXX
he must NOT be redirected




Thanks