oh wow it's working

app/controllers/Coach.scala

@@ -16,6 +16,19 @@ object Coach extends LilaController {
     }
   }
 
+  def ask(username: String) = Open { implicit ctx =>
+    import lila.coach.{ Question, Dimension, Metric }
+    Accessible(username) { user =>
+      env.api.ask(Question[lila.coach.Ecopening, Dimension[lila.coach.Ecopening]](
+        xAxis = Dimension.Opening: Dimension[lila.coach.Ecopening],
+        yAxis = Metric.Movetime,
+        filters = Nil
+      ), user) map { answer =>
+        Ok(html.coach.answer(answer, user))
+      }
+    }
+  }
+
   private def Accessible(username: String)(f: lila.user.User => Fu[Result])(implicit ctx: Context) =
     lila.user.UserRepo named username flatMap {
       case None => notFound

app/views/coach/answer.scala.html

@@ -0,0 +1,6 @@
+@(answer: lila.coach.Answer[_, _], u: User)(implicit ctx: Context)
+
+@coach.layout(u, title = s"${u.username} coach") {
+
+@answer
+}

conf/routes

@@ -44,6 +44,7 @@ GET   /rel/blocks                      controllers.Relation.blocks
 
 # Coach
 POST  /coach/refresh/:username         controllers.Coach.refresh(username: String)
+GET   /coach/:username                 controllers.Coach.ask(username: String)
 
 # User
 GET   /@/:username/opponents           controllers.User.opponents(username: String)

modules/coach/src/main/CoachApi.scala

@@ -36,7 +36,7 @@ final class CoachApi(coll: Coll) {
       }
   }
 
-  private val unwindMoves = Unwind("$moves").some
+  private val unwindMoves = Unwind("moves").some
   private val sortNb = Sort(Descending("nb")).some
   private def limit(nb: Int) = Limit(nb).some