> Can someone tell me what's the pali word Buddha used to indicate chess..

Dear ruwanr,

I am unable to determine with absolute certainty the exact word that
Gotama Buddha used for "chess." Nevertheless, in one Paali dictionary,
there exists an entry for the word you've inquired about. The
reference used is the "English-Pali Dictionary" by Metta Net. in Sri
Lanka.

chess : (f.) atthapadakila; caturangakila.