diff --git a/kifu/kifu-gtk/src/main.rs b/kifu/kifu-gtk/src/main.rs
index 617ab45..6d5eb15 100644
--- a/kifu/kifu-gtk/src/main.rs
+++ b/kifu/kifu-gtk/src/main.rs
@@ -1,5 +1,6 @@
 use gtk::prelude::*;
 use kifu_core::{CoreApp, Request, Response};
+use kifu_gtk::ui::PlayingField;
 use std::{
     sync::{Arc, Mutex},
     time::Duration,
@@ -62,8 +63,14 @@ fn main() {
             let window = gtk::ApplicationWindow::new(app);
             window.present();
 
-            gtk_rx.attach(None, |message| {
+            gtk_rx.attach(None, move |message| {
                 println!("message: {:?}", message);
+                match message {
+                    Response::PlayingFieldView(view) => {
+                        let playing_field = PlayingField::new(view);
+                        window.set_child(Some(&playing_field));
+                    }
+                }
                 Continue(true)
             });
 
diff --git a/kifu/kifu-gtk/src/ui/goban.rs b/kifu/kifu-gtk/src/ui/goban.rs
index 7c82ded..de38732 100644
--- a/kifu/kifu-gtk/src/ui/goban.rs
+++ b/kifu/kifu-gtk/src/ui/goban.rs
@@ -56,8 +56,8 @@ impl ObjectImpl for GobanPrivate {
                 });
 
                 context.set_source_rgb(0.1, 0.1, 0.0);
-                vec![4, 9, 15].into_iter().for_each(|col| {
-                    vec![4, 9, 15].into_iter().for_each(|row| {
+                vec![3, 9, 15].into_iter().for_each(|col| {
+                    vec![3, 9, 15].into_iter().for_each(|row| {
                         pen.star_point(context, col, row);
                     });
                 });