+/* Is the cell at (x,y) occupied by a piece. Returns FALSE for all
+ * out-of-bounds coordinates. */
+dvonn_bool_t
+dvonn_board_cell_occupied (dvonn_board_t *board,
+ int x, int y);
+
+/* Is the cell at (x,y) occupied by a piece (or stack) with the given
+ * player's piece at the top. Returns FALSE for all out-of-bounds
+ * coordinates. */
+dvonn_bool_t
+dvonn_board_cell_owned_by (dvonn_board_t *board,
+ int x, int y, dvonn_player_t player);
+
+/* Is the cell at (x,y) surrounded by other pieces, (such that it is
+ * not legal for a piece at (x,y) to move. */
+dvonn_bool_t
+dvonn_board_cell_surrounded (dvonn_board_t *board,
+ int x, int y);
+
+