First TwoPlayerTrueSkillCalculator unit test passed

PHPSkills/Elo/FideKFactor.php

@@ -0,0 +1,30 @@
+<?php
+namespace Moserware\Skills\Elo;
+
+require_once(dirname(__FILE__) . "/KFactor.php");
+
+// see http://ratings.fide.com/calculator_rtd.phtml for details
+class FideKFactor extends KFactor
+{
+    public function getValueForRating($rating)
+    {
+        if ($rating < 2400)
+        {
+            return 15;
+        }
+
+        return 10;
+    }    
+}
+
+/**
+ * Indicates someone who has played less than 30 games.
+ */
+class ProvisionalFideKFactor extends FideKFactor
+{
+    public function getValueForRating($rating)
+    {
+        return 25;
+    }
+}
+?>