look at the 4 icons in glchess' main window's lower-left corner. One of then is wrong ( gtk-help instead of gtk-go-forward! ) the following patch corrects that:

diff --git a/glchess/data/glchess.ui b/glchess/data/glchess.ui
index 7ec1644..9fd42fc 100644
--- a/glchess/data/glchess.ui
+++ b/glchess/data/glchess.ui
@@ -413,8 +413,7 @@
                         <child>
                           <object class="GtkImage" id="image8">
                             <property name="visible">True</property>
-                            <property name="stock">gtk-help</property>
-                            <property name="icon-size">1</property>
+                            <property name="stock">gtk-go-forward</property>
                           </object>
                         </child>
                       </object>