šah

1. chess
   Deda me je naučio da igram šah. — My grandpa taught me to play chess.
   Svake večeri igraju šah u parku. — They play chess in the park every evening.
2. (in chess) check
   Pomerio je lovca i rekao: „Šah!“ — He moved his bishop and said, "Check!"
3. shah
   Poslednji iranski šah napustio je zemlju 1979. — The last Shah of Iran left the country in 1979.

In the sense "chess" it is singular: igrati šah.