From 3b5c015f8d906cda5a6723875807a25ee90745db Mon Sep 17 00:00:00 2001
From: melvin <unknown>
Date: Sat, 11 Jun 2011 16:25:23 +0800
Subject: [PATCH] amount of boosting for win/lose nodes configured by BOOST
 variable

---
 src/magic/ai/MCTSAI.java | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/magic/ai/MCTSAI.java b/src/magic/ai/MCTSAI.java
index 8673b8943b..3199f610ef 100644
--- a/src/magic/ai/MCTSAI.java
+++ b/src/magic/ai/MCTSAI.java
@@ -67,9 +67,13 @@ public class MCTSAI implements MagicAI {
     private long STARTTIME;
     private boolean USE_CACHE = true;
     private static final int MAXEVENTS = 1000;
+    
     //higher C -> more exploration less exploitation
     static final double C = 1.0;
 
+    //boost score of win nodes by BOOST and decrease scores of lost nodes by BOOST
+    static final int BOOST = 1000000;
+
     //store the top 10000 most used nodes
     private final CacheNode cache = null;// = new CacheNode(10000);
 
@@ -532,9 +536,9 @@ class MCTSGameTree implements Iterable<MCTSGameTree> {
 
     public double getRank() {
         if (isAIWin()) {
-            return 10000 + getNumSim();
+            return MCTSAI.BOOST + getNumSim();
         } else if (isAILose()) {
-            return -10000 + getNumSim();
+            return -MCTSAI.BOOST + getNumSim();
         } else {
             return getNumSim();
         }