info when clicking board

main.py

@@ -6,6 +6,7 @@
 from kivy.uix.boxlayout import BoxLayout
 from kivy.uix.stencilview import StencilView
 from kivy.uix.widget import Widget
+from kivy.uix.behaviors.button import ButtonBehavior
 
 from controller import Controls
 from kivyutils import *
@@ -23,6 +24,9 @@ def __init__(self, **kwargs):
     def on_size(self, *args):
         self.redraw()
 
+    def on_touch_down(self, touch):
+        self.controls.hint.text = "Ten Thousand Tsumego does not support 'clicking through' problems. Read out the problem in your head, and move on when you are done."
+
     def draw_stone(self, x, y, col, stone_size, outline_col=None, innercol=None):
         draw_circle((self.gridpos_x[x], self.gridpos_y[y]), stone_size, col)
         if outline_col: