⚆

⚆	U+2686, ⚆ WHITE CIRCLE WITH DOT RIGHT

⚈	U+2688, ⚈ BLACK CIRCLE WITH WHITE DOT RIGHT

Translingual

English Wikipedia has an article on:

⚆

A dot marking a board position overlapping with a Go stone.

⚆

(go) An ad hoc notation that a white (⚆) or black (⚈) stone placed in this position is worth a point.^[1]

^ Elwyn Berlekamp & David Wolfe (1994) Mathematical Go: Chilling Gets the Last Point, A. K. Peters Ltd, p. 15ff