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diff --git a/quacker/oppothread.h b/quacker/oppothread.h
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+/*
+ *  Quackle -- Crossword game artificial intelligence and analysis tool
+ *  Copyright (C) 2005-2006 Jason Katz-Brown and John O'Laughlin.
+ *
+ *  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., 51 Franklin Street, Fifth Floor, Boston, MA  
+ *  02110-1301  USA
+ */
+
+#ifndef QUACKER_OPPOTHREAD_H
+#define QUACKER_OPPOTHREAD_H
+
+#include <QMutex>
+#include <QThread>
+
+#include <computerplayer.h>
+#include <game.h>
+
+class QuackerDispatch : public QObject, public Quackle::ComputerDispatch
+{
+Q_OBJECT
+
+public:
+	QuackerDispatch(QObject *parent = 0);
+	virtual ~QuackerDispatch();
+
+	virtual bool shouldAbort() { return m_shouldAbort; }
+	virtual void setShouldAbort(bool shouldAbort) { m_shouldAbort = shouldAbort; }
+
+	virtual void signalFractionDone(double fraction);
+
+signals:
+	void fractionDone(double fractionDone);
+
+private:
+	bool m_shouldAbort;
+};
+
+class OppoThread : public QThread
+{
+Q_OBJECT
+
+public:
+	OppoThread(QObject *parent = 0);
+	~OppoThread();
+
+	void setPosition(const Quackle::GamePosition &position);
+	const Quackle::GamePosition &position() const;
+
+	void setPlayer(Quackle::ComputerPlayer *player);
+	Quackle::ComputerPlayer *player() const;
+
+	// starts the thread
+	void findBestMoves(int nmoves);
+
+	void abort();
+
+	const Quackle::MoveList &moves() const;
+
+protected:
+	void run();
+
+signals:
+	void fractionDone(double fraction, OppoThread *thread);
+
+private slots:
+	void signalFractionDone(double fractionDone);
+
+private:
+	Quackle::GamePosition m_position;
+	Quackle::MoveList m_moves;
+	int m_nmoves;
+	Quackle::ComputerPlayer *m_player;
+
+	QuackerDispatch *m_dispatch;
+
+	QMutex m_mutex;
+};
+
+inline const Quackle::GamePosition &OppoThread::position() const
+{
+	return m_position;
+}
+
+inline Quackle::ComputerPlayer *OppoThread::player() const
+{
+	return m_player;
+}
+
+#endif