AI

src/ai.cpp

@@ -0,0 +1,88 @@
+/***************************************************************************
+ *   Copyright (C) 2009 by Stefan Bühler                                   *
+ *   stbuehler@web.de                                                      *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+#include "ai.h"
+
+namespace toruschess {
+
+// 	NOPIECE = 0, PAWN = 1, KNIGHT = 2, BISHOP = 3, ROOK = 4, QUEEN = 5, KING = 6
+	static int piece_value[] = {
+		0, 1, 3, 3, 5, 9, 10
+	};
+	static const int MAXVAL = 10000;
+	static const int NOMOVE = -MAXVAL - 1;
+	static const int DRAWVAL = -7;
+
+	static int minimax(Field &field, int bal, Player curp, unsigned int depth, Move *move) {
+		if (depth == 0) return curp * bal;
+		
+		int mx = NOMOVE;
+		for (int x = 0; x < 8; x++)
+		for (int y = 0; y < 8; y++) {
+			Pos p(x, y);
+			if (field.player(p) != curp) continue;
+			int cbal = bal;
+			QList<Move> moves = field.validMoves(p);
+			foreach(Move m, moves) {
+				field.move_unchecked(m);
+				cbal -= m.prevTo();
+				int val = -minimax(field, cbal, Player(-curp), depth-1, NULL);
+				if (val > mx) {
+					mx = val;
+					if (move) *move = m;
+				}
+				field.undo_unchecked(m);
+				if (mx == MAXVAL) return mx;
+			}
+		}
+		if (mx == NOMOVE) {
+			if (field.inCheck(curp)) return -MAXVAL;
+			return curp * DRAWVAL;
+		}
+		return mx;
+	}
+
+
+	Move ai::getMove(const Game *game) {
+		Player curp = NOPLAYER;
+		switch (game->state()) {
+		case TURN_WHITE:
+			curp = WHITE;
+			break;
+		case TURN_BLACK:
+			curp = BLACK;
+			break;
+		default:
+			return Move();
+		}
+		
+		Field field = *game->field();
+		int balance = 0;
+		for (int x = 0; x < 8; x++)
+		for (int y = 0; y < 8; y++) {
+			Pos p(x,y);
+			balance += field.player(p) * piece_value[field.piece(p)];
+		}
+		
+		Move move;
+		minimax(field, balance, curp, 2, &move);
+		
+		return move;
+	}
+}

src/ai.h

@@ -0,0 +1,35 @@
+/***************************************************************************
+ *   Copyright (C) 2009 by Stefan Bühler                                   *
+ *   stbuehler@web.de                                                      *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+#ifndef TORUSCHESSAI_H
+#define TORUSCHESSAI_H
+
+#include "toruschess.h"
+
+/**
+	@author Stefan Bühler <stbuehler@web.de>
+*/
+namespace toruschess {
+	class ai{
+	public:
+		static Move getMove(const Game *game);
+	};
+}
+
+#endif

src/field2d.cpp

@@ -29,15 +29,22 @@
 namespace toruschess {
 	
 	Field2D::Field2D(Game *game, QWidget *parent)
-	: QWidget(parent), m_lib(new PieceLibrary(this)), m_game(game), m_fieldWidth(360), m_fieldHeight(360), m_originX(23), m_originY(23) {
+	: QWidget(parent), m_lib(new PieceLibrary(this)), m_game(game), m_fieldWidth(360), m_fieldHeight(360), m_originX(23), m_originY(23), m_fieldBuffer(0) {
 		for (int x = 0; x < 8; x++) for (int y = 0; y < 8; y++) m_marked[x][y] = false;
 		m_lib->setSize(m_fieldWidth / 8, m_fieldHeight / 8);
+		checkSizes();
+		connect(game, SIGNAL(updated()), this, SLOT(fieldUpdated()));
+	}
+	
+	Field2D::~Field2D() {
+		if (m_fieldBuffer) delete m_fieldBuffer;
 	}
 	
 	void Field2D::markMoves(const QList<Move> &moves) {
 		foreach(Move m, m_markedMoves) m_marked[m.to().x()][m.to().y()] = false;
 		m_markedMoves = moves;
 		foreach(Move m, m_markedMoves) m_marked[m.to().x()][m.to().y()] = true;
+		updateFieldBuffer();
 		update();
 	}
 	
@@ -47,27 +54,12 @@ namespace toruschess {
 	
 	void Field2D::paintEvent(QPaintEvent *) {
 		QPainter pt(this);
-		int pieceWidth = m_fieldWidth / 8, pieceHeight = m_fieldHeight / 8;
+		
 		int winWidth = width(), winHeight = height();
-		for (int x = 0; x < 8; x++)
+		
-		for (int y = 0; y < 8; y++) {
+		for (int px = m_originX - m_fieldWidth; px < winWidth; px += m_fieldWidth)
-			bool marked = m_marked[x][y];
+		for (int py = m_originY - m_fieldHeight; py < winHeight; py += m_fieldHeight) {
-			int place = m_game->field()->place(Pos(x, y));
+			pt.drawImage(QRect(px, py, m_fieldWidth, m_fieldHeight), *m_fieldBuffer);
-			/* #D18B47 for dark, #FFCE9E for white */
-			QBrush fieldBG = ((x+y) % 2 == 1) ? QBrush(QColor(0xD1, 0x8B, 0x47)) : QBrush(QColor(0xFF, 0xCE, 0x9E));
-
-			for (int px = m_originX - m_fieldWidth + x*pieceWidth; px < winWidth; px += m_fieldWidth)
-			for (int py = m_originY - m_fieldHeight + y*pieceHeight; py < winHeight; py += m_fieldHeight) {
-				QRect prect(px, py, pieceWidth - 1, pieceHeight - 1);
-				pt.fillRect(prect, fieldBG);
-				m_lib->paint(pt, place, prect);
-				if (marked) {
-					int r = qMax(1, (pieceWidth + pieceHeight) / 36);
-					pt.setBrush(place != 0 ? Qt::green : Qt::white);
-					pt.setPen(Qt::red);
-					pt.drawEllipse(QPoint(px + pieceWidth / 2, py + pieceHeight / 2), r, r);
-				}
-			}
 		}
 	}
 	
@@ -94,6 +86,8 @@ namespace toruschess {
 	}
 	
 	void Field2D::mouseReleaseEvent(QMouseEvent *event) {
+		m_mouseLastX = event->x();
+		m_mouseLastY = event->y();
 		if (event->button() == Qt::LeftButton) {
 			if (m_markedMoves.size() == 0) return;
 			Pos from = m_markedMoves[0].from();
@@ -103,8 +97,6 @@ namespace toruschess {
 			Move m(m_game->field(), from, p);
 			m_game->move(m);
 		}
-		m_mouseLastX = event->x();
-		m_mouseLastY = event->y();
 	}
 	
 	void Field2D::wheelEvent(QWheelEvent *event) {
@@ -122,10 +114,45 @@ namespace toruschess {
 		m_originY = m_originY % m_fieldHeight;
 		if (m_originX < 0) m_originX += m_fieldWidth;
 		if (m_originY < 0) m_originY += m_fieldHeight;
+		if (!m_fieldBuffer || m_fieldBuffer->width() != m_fieldWidth || m_fieldBuffer->height() != m_fieldHeight) {
+			if (m_fieldBuffer) delete m_fieldBuffer;
+			m_fieldBuffer = new QImage(QSize(m_fieldWidth, m_fieldHeight), QImage::Format_ARGB32_Premultiplied);
+			m_fieldBuffer->fill(Qt::black);
+			updateFieldBuffer();
+		}
+	}
+	
+	void Field2D::updateFieldBuffer() {
+		QPainter pt(m_fieldBuffer);
+		
+		int pieceWidth = m_fieldWidth / 8;
+		int pieceHeight = m_fieldHeight / 8;
+		for (int x = 0; x < 8; x++)
+		for (int y = 0; y < 8; y++) {
+			bool marked = m_marked[x][y];
+			int place = m_game->field()->place(Pos(x, y));
+			/* #D18B47 for dark, #FFCE9E for white */
+			QBrush fieldBG = ((x+y) % 2 == 1) ? QBrush(QColor(0xD1, 0x8B, 0x47)) : QBrush(QColor(0xFF, 0xCE, 0x9E));
+
+			QRect prect(x * pieceWidth, y * pieceHeight, pieceWidth - 1, pieceHeight - 1);
+			pt.fillRect(prect, fieldBG);
+			m_lib->paint(pt, place, prect);
+			if (marked) {
+				int r = qMax(1, (pieceWidth + pieceHeight) / 36);
+				pt.setBrush(place != 0 ? Qt::green : Qt::white);
+				pt.setPen(Qt::red);
+				pt.drawEllipse(QPoint(prect.x() + pieceWidth / 2, prect.y() + pieceHeight / 2), r, r);
+			}
+		}
+		update();
 	}
 	
 	Pos Field2D::findPos(int x, int y) {
 		return Pos(8 * ((x - m_originX) % m_fieldWidth) / m_fieldWidth, 8 * ((y - m_originY) % m_fieldHeight) / m_fieldHeight);
 	}
 	
+	void Field2D::fieldUpdated() {
+		markMoves(QList<Move>());
+	}
+	
 }

src/field2d.h

@@ -35,6 +35,7 @@ namespace toruschess {
 	Q_OBJECT
 	public:
 		Field2D(Game *game, QWidget *parent = 0);
+		virtual ~Field2D();
 		
 		void markMoves(const QList<Move> &moves);
 		
@@ -48,9 +49,13 @@ namespace toruschess {
 		virtual void wheelEvent(QWheelEvent *event);
 		
 		void checkSizes();
+		void updateFieldBuffer();
 		
 		Pos findPos(int x, int y);
 		
+	protected slots:
+		void fieldUpdated();
+		
 	private:
 		PieceLibrary *m_lib;
 		Game *m_game;
@@ -61,6 +66,8 @@ namespace toruschess {
 		int m_originX, m_originY;
 		
 		int m_mouseLastX, m_mouseLastY;
+		
+		QImage *m_fieldBuffer;
 	};
 
 }

src/piecelibrary.cpp

@@ -138,7 +138,7 @@ typedef size_t (*Lib3dsIoWriteFunc)(void *self, const void *buffer, size_t size)
 	}
 	
 	PieceLibrary::~PieceLibrary() {
-		lib3ds_file_free(m_pawn);
+		if (m_pawn) lib3ds_file_free(m_pawn);
 		delete [] m_pieces;
 		delete [] m_buffers;
 	}

src/src.pro

@@ -3,7 +3,8 @@ SOURCES += main.cpp \
  toruschess.cpp \
  field2d.cpp \
  piecelibrary.cpp \
- field3d.cpp
+ field3d.cpp \
+ ai.cpp
 TEMPLATE = app
 CONFIG += warn_on \
 	  thread \
@@ -20,8 +21,12 @@ HEADERS += testgame.h \
 toruschess.h \
  field2d.h \
  piecelibrary.h \
- field3d.h
+ field3d.h \
-CONFIG -= release
+ ai.h
 
 LIBS += -l3ds
 
+QMAKE_CXXFLAGS_RELEASE += -g
+
+CONFIG -= release
+

src/testgame.cpp

@@ -23,10 +23,13 @@
 #include <QResizeEvent>
 #include <QMouseEvent>
 #include <QPainter>
+#include <QStatusBar>
 
 #include "field2d.h"
 #include "field3d.h"
 
+#include "ai.h"
+
 namespace toruschess {
 
 	TestPlace::TestPlace(QWidget *parent, const PieceLibrary *lib, const Field *field, const Pos &p)
@@ -115,7 +118,21 @@ namespace toruschess {
 		setWindowTitle("Torus Chess");
 // 		PieceLibrary *lib = new PieceLibrary(this);
 // 		setCentralWidget(new TestField(this, lib, m_game));
-		setCentralWidget(new Field3D(m_game, this));
+		setCentralWidget(new Field2D(m_game, this));
+		statusBar()->show();
+		connect(m_game, SIGNAL(updated()), this, SLOT(gameUpdated()));
+		connect(m_game, SIGNAL(changed(GameState)), this, SLOT(gameChanged(GameState)));
+		m_game->restart();
+	}
+	
+	void TestGame::gameUpdated() {
+		if (m_game->state() == TURN_BLACK) {
+			Move m = ai::getMove(m_game);
+			if (m.valid()) m_game->move(m);
+		}
+	}
+	
+	void TestGame::gameChanged(GameState state) {
+		statusBar()->showMessage(state2string(state));
 	}
-
 }

src/testgame.h

@@ -80,6 +80,10 @@ namespace toruschess {
 	public:
 		TestGame(QWidget *parent = 0);
 	
+	private slots:
+		void gameUpdated();
+		void gameChanged(GameState state);
+	
 	private:
 		Game *m_game;
 	};

src/toruschess.cpp

@@ -35,6 +35,9 @@ namespace toruschess {
 	Move::Move(const Field* field, const Pos &from, const Pos &to)
 	: m_from(from), m_to(to), m_prevFrom(field->place(from)), m_prevTo(field->place(to)), m_player(field->player(from)) { }
 
+	Move::Move()
+	: m_from(), m_to(), m_prevFrom(0), m_prevTo(0), m_player(NOPLAYER) { }
+
 	static const int start_field[8][8] = {
 		{ -KNIGHT, -PAWN, -ROOK, 0, 0, 0, 0, 0 },
 		{ -BISHOP, -KING, -QUEEN, 0, 0, 0, 0, 0 },
@@ -46,11 +49,14 @@ namespace toruschess {
 		{ 0, 0, 0, 0, 0, 0, 0, 0 }
 	};
 
-	Field::Field() {
+	Field::Field()
+	: m_wking(5, 5), m_bking(1, 1) {
 		memcpy(m_places, start_field, sizeof(start_field));
 	}
 
 	void Field::reset() {
+		m_wking = Pos(5, 5);
+		m_bking = Pos(1, 1);
 		memcpy(m_places, start_field, sizeof(start_field));
 	}
 
@@ -102,7 +108,7 @@ namespace toruschess {
 	QList<Move> Field::simpleValidMoves(const Pos &from) const {
 		QList<Move> moves;
 		int thePlace = place(from);
-		Piece thePiece = (Piece) qAbs(thePlace);
+		Piece thePiece = place2piece(thePlace);
 // 		qDebug("simpleValidMoves: %i", thePiece);
 		switch (thePiece) {
 		case NOPIECE:
@@ -152,69 +158,163 @@ namespace toruschess {
 	
 	QList<Move> Field::validMoves(const Pos &from) const {
 		QList<Move> moves = simpleValidMoves(from);
-		int thePlace = place(from);
-		Pos pking(0,0);
-		/* find king */
-		for (int x = 0; x < 8; x++) for (int y = 0; y < 8; y++) {
-			if (piece(Pos(x, y)) == KING && 0 < place(Pos(x, y)) * thePlace) {
-				pking = Pos(x, y);
-				goto foundking;
-			}
-		}
-		return QList<Move>(); /* error, no king found */
-foundking:
 		QList<Move> resMoves;
 		Field testField(*this);
-		testField.place(from) = 0;
+		Player pl = player(from);
-		bool movedKing = (from == pking);
-		Player player = place2player(thePlace);
 		foreach(Move m, moves) {
-			testField.place(m.to()) = thePlace;
+			Q_ASSERT(validMove(m));
-			if (!testField.inCheck(player, movedKing ? m.to() : pking)) {
+			testField.move_unchecked(m);
+			if (!testField.inCheck(pl)) {
 				resMoves.push_back(m);
 			}
-			testField.place(m.to()) = m.prevTo();
+			testField.undo_unchecked(m);
 		}
 		return resMoves;
 	}
 	
+	static bool checkReach(const Field *field, const Pos &from, const Pos &dest, int dx, int dy) {
+		for (int d = 1; d < 8; d++) {
+			Pos to = Pos(from.x() + d*dx, from.y() + d*dy);
+			if (dest == to) return true;
+			int toPlace = field->place(to);
+			if (0 == toPlace) {
+				continue;
+			} else {
+				for (int c = 7; c > d; c--) {
+					to = Pos(from.x() + c*dx, from.y() + c*dy);
+					if (dest == to) return true;
+					toPlace = field->place(to);
+					if (0 == toPlace) {
+						continue;
+					} else {
+						return false;
+					}
+				}
+				return false;
+			}
+		}
+		return false;
+	}
+	
 	bool Field::validMove(const Move &m) const {
-		QList<Move> moves = validMoves(m.from());
+		if (player(m.from()) != m.player()) return false;
-		return moves.contains(m);
+		if (m.player() == NOPLAYER) return false;
+		if (place(m.from()) != m.prevFrom() || place(m.to()) != m.prevTo()) return false;
+		if (player(m.to()) == m.player()) return false;
+		switch (piece(m.from())) {
+		case NOPIECE:
+			return false;
+		case PAWN: {
+			int dx = (8 + m.from().x() - m.to().x()) % 8, dy = (8 + m.from().y() - m.to().y()) % 8;
+			if ((dx > 1 && dx < 7) || (dy > 1 && dy < 7)) return false;
+			if (dx != 0 && dy != 0) return player(m.to()) != NOPLAYER; /* beat */
+			return player(m.to()) == NOPLAYER; /* walk */
+		}
+		case KNIGHT: {
+			int dx = (8 + m.from().x() - m.to().x()) % 8, dy = (8 + m.from().y() - m.to().y()) % 8;
+			return ((dx == 2 || dx == 6) && (dy == 1 || dy == 7)) || ((dx == 1 || dx == 7) && (dy == 2 || dy == 6));
+		}
+		case BISHOP: {
+			int dx = (8 + m.from().x() - m.to().x()) % 8, dy = (8 + m.from().y() - m.to().y()) % 8;
+			if (dx == dy) {
+				if (dx == 4) {
+					return checkReach(this, m.from(), m.to(), 1, 1) || checkReach(this, m.from(), m.to(), 1, 7);
+				} else {
+					return checkReach(this, m.from(), m.to(), 1, 1);
+				}
+			} else if (dx + dy == 8) {
+				return checkReach(this, m.from(), m.to(), 1, 7);
+			} else {
+				return false;
+			}
+		}
+		case ROOK: {
+			int dx = (8 + m.from().x() - m.to().x()) % 8, dy = (8 + m.from().y() - m.to().y()) % 8;
+			if (dy == 0) {
+				return checkReach(this, m.from(), m.to(), 1, 0);
+			} else if (dx == 0) {
+				return checkReach(this, m.from(), m.to(), 0, 1);
+			} else {
+				return false;
+			}
+		}
+		case QUEEN: {
+			int dx = (8 + m.from().x() - m.to().x()) % 8, dy = (8 + m.from().y() - m.to().y()) % 8;
+			if (dx == dy) {
+				if (dx == 4) {
+					return checkReach(this, m.from(), m.to(), 1, 1) || checkReach(this, m.from(), m.to(), 1, 7);
+				} else {
+					return checkReach(this, m.from(), m.to(), 1, 1);
+				}
+			} else if (dx + dy == 8) {
+				return checkReach(this, m.from(), m.to(), 1, 7);
+			} else if (dy == 0) {
+				return checkReach(this, m.from(), m.to(), 1, 0);
+			} else if (dx == 0) {
+				return checkReach(this, m.from(), m.to(), 0, 1);
+			} else {
+				return false;
+			}
+		}
+		case KING: {
+			int dx = (8 + m.from().x() - m.to().x()) % 8, dy = (8 + m.from().y() - m.to().y()) % 8;
+			if ((dx > 1 && dx < 7) || (dy > 1 && dy < 7)) return false;
+			return true;
+		}
+		}
+		return false;
+	}
+	
+	void Field::move_unchecked(const Move &m) {
+		place(m.from()) = 0;
+		place(m.to()) = m.prevFrom();
+		if (m.prevFrom() == KING) {
+			m_wking = m.to();
+		} else if (m.prevFrom() == -KING) {
+			m_bking = m.to();
+		}
+	}
+	
+	void Field::undo_unchecked(const Move &m) {
+		place(m.from()) = m.prevFrom();
+		place(m.to()) = m.prevTo();
+		if (m.prevFrom() == KING) {
+			m_wking = m.from();
+		} else if (m.prevFrom() == -KING) {
+			m_bking = m.from();
+		}
 	}
 	
 	bool Field::move(const Move &m) {
+		if (!m.valid()) return false;
 		if (!validMove(m)) return false;
-		place(m.from()) = 0;
+		move_unchecked(m);
-		place(m.to()) = m.prevFrom();
+		if (inCheck(m.player())) {
+			undo_unchecked(m);
+			return false;
+		}
 		return true;
 	}
 	bool Field::undo(const Move &m) {
 		if (place(m.from()) != 0 || place(m.to()) != m.prevFrom()) return false;
-		place(m.from()) = m.prevFrom();
+		undo_unchecked(m);
-		place(m.to()) = m.prevTo();
+		return true;
-		return false;
 	}
 	
 	bool Field::inCheck(Player player, const Pos &pking) const {
 		for (int x = 0; x < 8; x++) for (int y = 0; y < 8; y++) {
 			Pos curp(x, y);
-			if (0 > place(curp) * player && simpleValidMoves(curp).contains(Move(this, curp, pking))) {
+			if (0 > place(curp) * player && validMove(Move(this, curp, pking))) {
 				return true;
 			}
 		}
 		return false;
 	}
 	
-	bool Field::inCheck(Player player) const {
+	bool Field::inCheck(Player p) const {
-		/* find king */
+		const Pos &pos = (p == WHITE) ? m_wking : m_bking;
-		for (int x = 0; x < 8; x++) for (int y = 0; y < 8; y++) {
+		if (player(pos) != p || piece(pos) != KING) return false;
-			Pos curp(x, y);
+		return inCheck(p, pos);
-			if (piece(curp) == KING && 0 < place(curp) * player) {
-				return inCheck(player, curp);
-			}
-		}
-		return false; /* error, no king found */
 	}
 	
 	Game::Game(QObject *parent)
@@ -225,6 +325,7 @@ foundking:
 	}
 	
 	bool Game::move(const Move &m) {
+		if (!m.valid()) return false;
 		switch (m_state) {
 		case TURN_WHITE:
 			if (m.player() != WHITE) return false;

src/toruschess.h

@@ -64,6 +64,7 @@ namespace toruschess {
 
 	class Move {
 	public:
+		Move();
 		Move(const Field* field, const Pos &from, const Pos &to);
 		
 		const Pos& from() const { return m_from; }
@@ -80,6 +81,8 @@ namespace toruschess {
 			/* player is included in m_prevFrom */
 		}
 		
+		bool valid() const { return m_prevFrom != 0; }
+		
 	private:
 		Pos m_from,m_to;
 		int m_prevFrom, m_prevTo;
@@ -98,16 +101,19 @@ namespace toruschess {
 		int& place(const Pos &p) { return m_places[p.y()][p.x()]; }
 		
 		QList<Move> validMoves(const Pos &from) const;
-		bool validMove(const Move &m) const;
+		bool validMove(const Move &m) const; /* does not check for inCheck */
 		bool move(const Move &m);
 		bool undo(const Move &m);
 		
 		bool inCheck(Player player, const Pos &pking) const;
 		bool inCheck(Player player) const;
 		
+		void move_unchecked(const Move &m);
+		void undo_unchecked(const Move &m);
 	private:
 		QList<Move> simpleValidMoves(const Pos &from) const;
-	
+		
+		Pos m_wking, m_bking;
 		int m_places[8][8];
 	};
 

toruschess.kdevelop

@@ -152,13 +152,13 @@
       <autokdesu>false</autokdesu>
       <envvars/>
       <runarguments>
-        <toruschess/>
+        <toruschess></toruschess>
       </runarguments>
       <cwd>
         <toruschess>/home/stefan/studium/7. semester/fapra_vis/src/toruschess/..</toruschess>
       </cwd>
       <debugarguments>
-        <toruschess/>
+        <toruschess></toruschess>
       </debugarguments>
     </run>
     <general>