Substantial refactoring to implement correct Naive, UCT Monte Carlo tree search methods.

Removed unnecessary distinction between policy and tree search (tree search is a special kind of policy).
Calculation of all valid moves / arbitrary sets of moves is now a seperate class, as it serves a different purpose than a policy.
Introduced regression error in AlphaBeta test.

test/net/woodyfolsom/msproj/CaptureTest.java

@@ -0,0 +1,86 @@
+package net.woodyfolsom.msproj;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import net.woodyfolsom.msproj.GameBoard;
+import net.woodyfolsom.msproj.GameConfig;
+import net.woodyfolsom.msproj.GameScore;
+import net.woodyfolsom.msproj.GameState;
+import net.woodyfolsom.msproj.StateEvaluator;
+
+import org.junit.Test;
+
+public class CaptureTest {
+	@Test
+	public void testCapture() {
+		GameState gameState = new GameState(5);
+		gameState.playStone('A', 2, GameBoard.BLACK_STONE);
+		gameState.playStone('B', 3, GameBoard.BLACK_STONE);
+		gameState.playStone('B', 1, GameBoard.BLACK_STONE);
+		assertTrue(gameState.playStone('B', 2, GameBoard.WHITE_STONE));
+		
+		assertEquals(0,gameState.getBlackPrisoners());
+		assertEquals(0,gameState.getWhitePrisoners());
+		
+		assertTrue(gameState.playStone('C', 2, GameBoard.BLACK_STONE));
+		
+		assertEquals(1,gameState.getBlackPrisoners());
+		assertEquals(0,gameState.getWhitePrisoners());
+		
+		System.out.println(gameState);
+	}
+	
+	@Test
+	public void testMultiGroupCapture() {
+		GameConfig gameConfig = new GameConfig();
+		GameState gameState = new GameState(5);
+		
+		gameState.playStone('A', 2, GameBoard.BLACK_STONE);
+		gameState.playStone('B', 3, GameBoard.BLACK_STONE);
+		gameState.playStone('B', 1, GameBoard.BLACK_STONE);
+		gameState.playStone('C', 4, GameBoard.BLACK_STONE);
+		gameState.playStone('D', 3, GameBoard.BLACK_STONE);
+		
+		assertTrue(gameState.playStone('B', 2, GameBoard.WHITE_STONE));
+		assertTrue(gameState.playStone('C', 3, GameBoard.WHITE_STONE));
+		
+		assertEquals(0,gameState.getBlackPrisoners());
+		assertEquals(0,gameState.getWhitePrisoners());
+		
+		assertTrue(gameState.playStone('C', 2, GameBoard.BLACK_STONE));
+		
+		assertEquals(2,gameState.getBlackPrisoners());
+		assertEquals(0,gameState.getWhitePrisoners());
+		
+		assertFalse(gameState.playStone('B', 2, GameBoard.WHITE_STONE));
+		assertFalse(gameState.playStone('C', 3, GameBoard.WHITE_STONE));
+		
+		System.out.println(gameState);
+		
+		GameScore gameScore = new StateEvaluator(gameConfig).scoreGame(gameState);
+		System.out.println(gameScore.getScoreReport());
+	}
+	
+	@Test
+	public void testCaptureFromEye() {
+		GameState gameState = new GameState(5);
+		
+		gameState.playStone('A', 1, GameBoard.BLACK_STONE);
+		gameState.playStone('B', 2, GameBoard.BLACK_STONE);
+		gameState.playStone('C', 1, GameBoard.BLACK_STONE);
+		gameState.playStone('A', 2, GameBoard.WHITE_STONE);
+		gameState.playStone('B', 3, GameBoard.WHITE_STONE);
+		gameState.playStone('C', 2, GameBoard.WHITE_STONE);
+		
+		//This capture should be allowed.
+		assertTrue("Capture from within single eye should have been allowed but move was rejected.",
+				gameState.playStone('B', 1, GameBoard.WHITE_STONE));
+
+		assertEquals(0,gameState.getBlackPrisoners());
+		assertEquals(2,gameState.getWhitePrisoners());
+		
+		System.out.println(gameState);
+	}
+}