碁盤

1. Origins, structure, and basic meaning

• Structure: 碁盤, read ごばん, is the noun for the board on which Go stones are placed.
• Basic usage: 碁盤の上 locates a stone on the board, whereas 碁盤の表面 identifies the physical surface being wiped.

2. Common pitfalls and similar expressions

• 上 versus 表面 on a Go board
  • Both phrases use the board as their reference, but 上 describes position and 表面 emphasizes the material surface.