diff --git a/contest.rb b/contest.rb
index 7125d6c..87c4e26 100644
--- a/contest.rb
+++ b/contest.rb
@@ -8,15 +8,15 @@ class Contest
 
   include Judge
 
-  def initialize
-    load_bots
+  def initialize(*names)
+    load_bots(*names)
     @results = []
     @win_counts = Hash.new(0)
   end
 
   def start
     @bots.each_with_index do |bot, index|
-      @bots.slice(index..(-1)).each do |opponent|
+      @bots.slice((index + 1)..(-1)).each do |opponent|
         fight! bot, opponent
       end
     end
@@ -25,11 +25,15 @@ def start
 
   private
 
-  def load_bots
+  def load_bots(*names)
     @bots = Dir['./bots/*.rb'].map do |path|
       require path
       File.basename(path).sub('.rb', '').classify.constantize
     end
+
+    if names.any?
+      @bots.select! { |bot| names.include?(bot.name) }
+    end
   end
 
   def fight!(botclass1, botclass2)
@@ -65,6 +69,4 @@ def print_avg_result(a, b, sums)
 
 end
 
-contest = Contest.new
-contest.start
 
diff --git a/script/fight b/script/fight
new file mode 100755
index 0000000..d47912e
--- /dev/null
+++ b/script/fight
@@ -0,0 +1,5 @@
+#!/usr/bin/env ruby
+
+require File.expand_path('../../contest.rb', __FILE__)
+
+Contest.new(*ARGV).start