The first type of Khmer chess game is known to the Cambodians as Ouk Chaktrang (អុកចត្រង្គ).

The name “Ouk” was believed to come from imitating the sound made between the chessman and the chessboard while checking. As terminology and rule are concerned, the word “Ouk” means check, and it is required to say out loud by the player who checks the enemy King.
The game is also named “Chaktrang” is formal and derived from Indian, Sanskrit Chaturanga (चतुरङ्ग).