Go Board
noun
A Go tray is a tray for playing the game of Go. In other words, it's a Go board.
碁盤 refers to the gridded wooden game board where players place their Go stones and engage in tiny, polite battles.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
濡れ衣だよ。じいちゃんの碁盤を壊したのは俺じゃないよ。
That's a false accusation. I didn't break grandpa's Go board.