Added en passant availability logging and FEN string export

src/dev/kske/chess/board/Board.java

@@ -458,11 +458,11 @@ public class Board implements Cloneable {
 		if (castlingSb.length() == 0) sb.append("-");
 		sb.append(castlingSb);
 
-		// TODO: en passant availability
-		sb.append(" -");
-
 		final LoggedMove lastMove = log.getLast();
 
+		// En passant availabillity
+		sb.append(" " + (lastMove == null || lastMove.enPassant == null ? "-" : lastMove.enPassant.toSAN()));
+
 		// Halfmove clock
 		sb.append(" " + String.valueOf(lastMove == null ? 0 : lastMove.halfmoveClock));
 

src/dev/kske/chess/board/Log.java

@@ -22,6 +22,11 @@ public class Log implements Cloneable {
 	}
 
 	public void add(Move move, Piece capturedPiece, boolean pawnMove) {
+		// En passant availability
+		Position enPassant = null;
+		if (pawnMove && move.yDist == 2) enPassant = new Position(move.pos.x, move.pos.y + move.ySign);
+
+		// Fullmove counter and halfmove clock
 		int fullmoveCounter, halfmoveClock;
 		if (moves.isEmpty()) {
 			fullmoveCounter	= 1;
@@ -32,7 +37,7 @@ public class Log implements Cloneable {
 			halfmoveClock = capturedPiece != null || pawnMove ? 0 : getLast().halfmoveClock + 1;
 		}
 		activeColor = activeColor.opposite();
-		moves.add(new LoggedMove(move, capturedPiece, fullmoveCounter, halfmoveClock));
+		moves.add(new LoggedMove(move, capturedPiece, enPassant, fullmoveCounter, halfmoveClock));
 	}
 
 	public LoggedMove getLast() { return moves.isEmpty() ? null : moves.get(moves.size() - 1); }
@@ -63,11 +68,13 @@ public class Log implements Cloneable {
 
 		public final Move	move;
 		public final Piece	capturedPiece;
+		public final Position	enPassant;
 		public final int	fullmoveCounter, halfmoveClock;
 
-		public LoggedMove(Move move, Piece capturedPiece, int fullmoveCounter, int halfmoveClock) {
+		public LoggedMove(Move move, Piece capturedPiece, Position enPassant, int fullmoveCounter, int halfmoveClock) {
 			this.move				= move;
 			this.capturedPiece		= capturedPiece;
+			this.enPassant			= enPassant;
 			this.fullmoveCounter	= fullmoveCounter;
 			this.halfmoveClock		= halfmoveClock;
 		}

src/dev/kske/chess/board/Move.java

@@ -30,9 +30,9 @@ public class Move {
 		this(new Position(xPos, yPos), new Position(xDest, yDest));
 	}
 
-	public static Move fromAlgebraicNotation(String move) {
+	public static Move fromSAN(String move) {
-		return new Move(Position.fromAlgebraicNotation(move.substring(0, 2)),
+		return new Move(Position.fromSAN(move.substring(0, 2)),
-				Position.fromAlgebraicNotation(move.substring(2)));
+				Position.fromSAN(move.substring(2)));
 	}
 
 	public boolean isHorizontal() { return yDist == 0; }

src/dev/kske/chess/board/Position.java

@@ -15,8 +15,12 @@ public class Position {
 		this.y	= y;
 	}
 
-	public static Position fromAlgebraicNotation(String pos) {
+	public static Position fromSAN(String pos) {
-		return new Position(pos.charAt(0) - 97, 7 - (Character.getNumericValue(pos.charAt(1)) - 1));
+		return new Position(pos.charAt(0) - 97, 8 - Character.getNumericValue(pos.charAt(1)));
+	}
+
+	public String toSAN() {
+		return String.valueOf((char) (x + 97)) + String.valueOf(8 - y);
 	}
 
 	@Override

src/dev/kske/chess/game/UCIPlayer.java

@@ -74,7 +74,7 @@ public class UCIPlayer extends Player implements UCIListener {
 
 	@Override
 	public void onBestMove(String move) {
-		Move moveObj = Move.fromAlgebraicNotation(move);
+		Move moveObj = Move.fromSAN(move);
 		game.onMove(this, moveObj);
 	}
 

test/dev/kske/chess/test/PositionTest.java

@@ -0,0 +1,52 @@
+package dev.kske.chess.test;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.IntStream;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import dev.kske.chess.board.Position;
+
+/**
+ * Project: <strong>Chess</strong><br>
+ * File: <strong>PositionTest.java</strong><br>
+ * Created: <strong>24.07.2019</strong><br>
+ * Author: <strong>Kai S. K. Engelbart</strong>
+ */
+class PositionTest {
+
+	List<Position>	positions;
+	List<String>	sans;
+
+	/**
+	 * @throws java.lang.Exception
+	 */
+	@BeforeEach
+	void setUp() throws Exception {
+		positions	= Arrays.asList(new Position(0, 0), new Position(7, 7), new Position(0, 7), new Position(7, 0));
+		sans		= Arrays.asList("a8", "h1", "a1", "h8");
+	}
+
+	/**
+	 * Test method for
+	 * {@link dev.kske.chess.board.Position#fromSAN(java.lang.String)}.
+	 */
+	@Test
+	void testFromSAN() {
+		IntStream.range(0, positions.size())
+			.forEach(i -> assertEquals(positions.get(i), Position.fromSAN(sans.get(i))));
+	}
+
+	/**
+	 * Test method for {@link dev.kske.chess.board.Position#toSAN()}.
+	 */
+	@Test
+	void testToSAN() {
+		IntStream.range(0, positions.size()).forEach(i -> assertEquals(sans.get(i), positions.get(i).toSAN()));
+	}
+
+}