Improve contest view

app/controllers/puzzles_controller.rb

@@ -1,6 +1,6 @@
 class PuzzlesController < ApplicationController
   before_action :set_contest
-  before_action :set_puzzle, only: %i[ show destroy ]
+  before_action :set_puzzle, only: %i[ edit destroy show update]
 
   def index
     @puzzles = Puzzle.all
@@ -9,6 +9,10 @@ class PuzzlesController < ApplicationController
   def show
   end
 
+  def edit
+    @title = "Edit contest puzzle"
+  end
+
   def new
     @puzzle = Puzzle.new
     @title = "New contest puzzle"
@@ -25,6 +29,14 @@ class PuzzlesController < ApplicationController
     end
   end
 
+  def update
+    if @puzzle.update(puzzle_params)
+      redirect_to @contest
+    else
+      render :edit, status: :unprocessable_entity
+    end
+  end
+
   def destroy
     @puzzle.destroy
     redirect_to puzzles_path