Cocoa inquires about the board and pieces sitting in front of Chino. Chino says it’s chess and gives a further explanation.

チノ：

「この温泉(おんせん)は強者(きょうしゃ)が集(あつ)まるのでおじいちゃんは白熱(はくねつ)していました」

“Grandpa would get excited because strong players gather at this hot spring spa.”