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diff --git a/examples/tutorial/t13.py b/examples/tutorial/t13.py
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+#!/usr/bin/env python
+
+#############################################################################
+##
+## Copyright (C) 2016 The Qt Company Ltd.
+## Contact: http://www.qt.io/licensing/
+##
+## This file is part of the PySide examples of the Qt Toolkit.
+##
+## $QT_BEGIN_LICENSE:BSD$
+## You may use this file under the terms of the BSD license as follows:
+##
+## "Redistribution and use in source and binary forms, with or without
+## modification, are permitted provided that the following conditions are
+## met:
+##   * Redistributions of source code must retain the above copyright
+##     notice, this list of conditions and the following disclaimer.
+##   * Redistributions in binary form must reproduce the above copyright
+##     notice, this list of conditions and the following disclaimer in
+##     the documentation and/or other materials provided with the
+##     distribution.
+##   * Neither the name of The Qt Company Ltd nor the names of its
+##     contributors may be used to endorse or promote products derived
+##     from this software without specific prior written permission.
+##
+##
+## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+# PySide2 tutorial 13
+
+
+import sys
+import math
+import random
+from PySide2 import QtCore, QtGui, QtWidgets
+
+
+class LCDRange(QtWidgets.QWidget):
+    valueChanged = QtCore.Signal(int)
+    def __init__(self, text=None, parent=None):
+        if isinstance(text, QtWidgets.QWidget):
+            parent = text
+            text = None
+
+        QtWidgets.QWidget.__init__(self, parent)
+
+        self.init()
+
+        if text:
+            self.setText(text)
+
+    def init(self):
+        lcd = QtWidgets.QLCDNumber(2)
+        self.slider = QtWidgets.QSlider(QtCore.Qt.Horizontal)
+        self.slider.setRange(0, 99)
+        self.slider.setValue(0)
+        self.label = QtWidgets.QLabel()
+        self.label.setAlignment(QtCore.Qt.AlignHCenter | QtCore.Qt.AlignTop)
+        self.label.setSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
+
+        self.connect(self.slider, QtCore.SIGNAL("valueChanged(int)"),
+                     lcd, QtCore.SLOT("display(int)"))
+        self.connect(self.slider, QtCore.SIGNAL("valueChanged(int)"),
+                     self, QtCore.SIGNAL("valueChanged(int)"))
+
+        layout = QtWidgets.QVBoxLayout()
+        layout.addWidget(lcd)
+        layout.addWidget(self.slider)
+        layout.addWidget(self.label)
+        self.setLayout(layout)
+
+        self.setFocusProxy(self.slider)
+
+    def value(self):
+        return self.slider.value()
+
+    @QtCore.Slot(int)
+    def setValue(self, value):
+        self.slider.setValue(value)
+
+    def text(self):
+        return self.label.text()
+
+    def setRange(self, minValue, maxValue):
+        if minValue < 0 or maxValue > 99 or minValue > maxValue:
+            QtCore.qWarning("LCDRange::setRange(%d, %d)\n"
+                    "\tRange must be 0..99\n"
+                    "\tand minValue must not be greater than maxValue" % (minValue, maxValue))
+            return
+
+        self.slider.setRange(minValue, maxValue)
+
+    def setText(self, text):
+        self.label.setText(text)
+
+
+class CannonField(QtWidgets.QWidget):
+    angleChanged = QtCore.Signal(int)
+    forceChanged = QtCore.Signal(int)
+    hit = QtCore.Signal()
+    missed = QtCore.Signal()
+    canShoot = QtCore.Signal(bool)
+    def __init__(self, parent=None):
+        QtWidgets.QWidget.__init__(self, parent)
+
+        self.currentAngle = 45
+        self.currentForce = 0
+        self.timerCount = 0
+        self.autoShootTimer = QtCore.QTimer(self)
+        self.connect(self.autoShootTimer, QtCore.SIGNAL("timeout()"),
+                     self.moveShot)
+        self.shootAngle = 0
+        self.shootForce = 0
+        self.target = QtCore.QPoint(0, 0)
+        self.gameEnded = False
+        self.setPalette(QtGui.QPalette(QtGui.QColor(250, 250, 200)))
+        self.setAutoFillBackground(True)
+        self.newTarget()
+
+    def angle(self):
+        return self.currentAngle
+
+    @QtCore.Slot(int)
+    def setAngle(self, angle):
+        if angle < 5:
+            angle = 5
+        if angle > 70:
+            angle = 70;
+        if self.currentAngle == angle:
+            return
+        self.currentAngle = angle
+        self.update()
+        self.emit(QtCore.SIGNAL("angleChanged(int)"), self.currentAngle)
+
+    def force(self):
+        return self.currentForce
+
+    @QtCore.Slot(int)
+    def setForce(self, force):
+        if force < 0:
+            force = 0
+        if self.currentForce == force:
+            return
+        self.currentForce = force;
+        self.emit(QtCore.SIGNAL("forceChanged(int)"), self.currentForce)
+
+    @QtCore.Slot()
+    def shoot(self):
+        if self.isShooting():
+            return
+        self.timerCount = 0
+        self.shootAngle = self.currentAngle
+        self.shootForce = self.currentForce
+        self.autoShootTimer.start(5)
+        self.emit(QtCore.SIGNAL("canShoot(bool)"), False)
+
+    firstTime = True
+
+    def newTarget(self):
+        if CannonField.firstTime:
+            CannonField.firstTime = False
+            midnight = QtCore.QTime(0, 0, 0)
+            random.seed(midnight.secsTo(QtCore.QTime.currentTime()))
+
+        self.target = QtCore.QPoint(200 + random.randint(0, 190 - 1), 10 + random.randint(0, 255 - 1))
+        self.update()
+
+    def setGameOver(self):
+        if self.gameEnded:
+            return
+        if self.isShooting():
+            self.autoShootTimer.stop()
+        self.gameEnded = True
+        self.update()
+
+    def restartGame(self):
+        if self.isShooting():
+            self.autoShootTimer.stop()
+        self.gameEnded = False
+        self.update()
+        self.emit(QtCore.SIGNAL("canShoot(bool)"), True)
+
+    @QtCore.Slot()
+    def moveShot(self):
+        region = QtGui.QRegion(self.shotRect())
+        self.timerCount += 1
+
+        shotR = self.shotRect()
+
+        if shotR.intersects(self.targetRect()):
+            self.autoShootTimer.stop()
+            self.emit(QtCore.SIGNAL("hit()"))
+            self.emit(QtCore.SIGNAL("canShoot(bool)"), True)
+        elif shotR.x() > self.width() or shotR.y() > self.height():
+            self.autoShootTimer.stop()
+            self.emit(QtCore.SIGNAL("missed()"))
+            self.emit(QtCore.SIGNAL("canShoot(bool)"), True)
+        else:
+            region = region.united(QtGui.QRegion(shotR))
+
+        self.update(region)
+
+    def paintEvent(self, event):
+        painter = QtGui.QPainter(self)
+
+        if self.gameEnded:
+            painter.setPen(QtCore.Qt.black)
+            painter.setFont(QtGui.QFont("Courier", 48, QtGui.QFont.Bold))
+            painter.drawText(self.rect(), QtCore.Qt.AlignCenter, "Game Over")
+
+        self.paintCannon(painter)
+        if self.isShooting():
+            self.paintShot(painter)
+        if not self.gameEnded:
+            self.paintTarget(painter)
+
+    def paintShot(self, painter):
+        painter.setPen(QtCore.Qt.NoPen);
+        painter.setBrush(QtCore.Qt.black)
+        painter.drawRect(self.shotRect())
+
+    def paintTarget(self, painter):
+        painter.setPen(QtCore.Qt.black)
+        painter.setBrush(QtCore.Qt.red)
+        painter.drawRect(self.targetRect())
+
+    barrelRect = QtCore.QRect(33, -4, 15, 8)
+
+    def paintCannon(self, painter):
+        painter.setPen(QtCore.Qt.NoPen)
+        painter.setBrush(QtCore.Qt.blue)
+
+        painter.save()
+        painter.translate(0, self.height())
+        painter.drawPie(QtCore.QRect(-35, -35, 70, 70), 0, 90 * 16)
+        painter.rotate(-self.currentAngle)
+        painter.drawRect(CannonField.barrelRect)
+        painter.restore()
+
+    def cannonRect(self):
+        result = QtCore.QRect(0, 0, 50, 50)
+        result.moveBottomLeft(self.rect().bottomLect())
+        return result
+
+    def shotRect(self):
+        gravity = 4.0
+
+        time = self.timerCount / 40.0
+        velocity = self.shootForce
+        radians = self.shootAngle * 3.14159265 / 180
+
+        velx = velocity * math.cos(radians)
+        vely = velocity * math.sin(radians)
+        x0 = (CannonField.barrelRect.right() + 5) * math.cos(radians)
+        y0 = (CannonField.barrelRect.right() + 5) * math.sin(radians)
+        x = x0 + velx * time
+        y = y0 + vely * time - 0.5 * gravity * time * time
+
+        result = QtCore.QRect(0, 0, 6, 6)
+        result.moveCenter(QtCore.QPoint(round(x), self.height() - 1 - round(y)))
+        return result
+
+    def targetRect(self):
+        result = QtCore.QRect(0, 0, 20, 10)
+        result.moveCenter(QtCore.QPoint(self.target.x(), self.height() - 1 - self.target.y()))
+        return result
+
+    def gameOver(self):
+        return self.gameEnded
+
+    def isShooting(self):
+        return self.autoShootTimer.isActive()
+
+
+class GameBoard(QtWidgets.QWidget):
+    def __init__(self, parent=None):
+        QtWidgets.QWidget.__init__(self, parent)
+
+        quit = QtWidgets.QPushButton("&Quit")
+        quit.setFont(QtGui.QFont("Times", 18, QtGui.QFont.Bold))
+
+        self.connect(quit, QtCore.SIGNAL("clicked()"),
+                     QtWidgets.qApp, QtCore.SLOT("quit()"))
+
+        angle = LCDRange("ANGLE")
+        angle.setRange(5, 70)
+
+        force = LCDRange("FORCE")
+        force.setRange(10, 50)
+
+        self.cannonField = CannonField()
+
+        self.connect(angle, QtCore.SIGNAL("valueChanged(int)"),
+                     self.cannonField.setAngle)
+        self.connect(self.cannonField, QtCore.SIGNAL("angleChanged(int)"),
+                     angle.setValue)
+
+        self.connect(force, QtCore.SIGNAL("valueChanged(int)"),
+                     self.cannonField.setForce)
+        self.connect(self.cannonField, QtCore.SIGNAL("forceChanged(int)"),
+                     force.setValue)
+
+        self.connect(self.cannonField, QtCore.SIGNAL("hit()"), self.hit)
+        self.connect(self.cannonField, QtCore.SIGNAL("missed()"), self.missed)
+
+        shoot = QtWidgets.QPushButton("&Shoot")
+        shoot.setFont(QtGui.QFont("Times", 18, QtGui.QFont.Bold))
+
+        self.connect(shoot, QtCore.SIGNAL("clicked()"), self.fire)
+        self.connect(self.cannonField, QtCore.SIGNAL("canShoot(bool)"),
+                     shoot, QtCore.SLOT("setEnabled(bool)"))
+
+        restart = QtWidgets.QPushButton("&New Game")
+        restart.setFont(QtGui.QFont("Times", 18, QtGui.QFont.Bold))
+
+        self.connect(restart, QtCore.SIGNAL("clicked()"), self.newGame)
+
+        self.hits = QtWidgets.QLCDNumber(2)
+        self.shotsLeft = QtWidgets.QLCDNumber(2)
+        hitsLabel = QtWidgets.QLabel("HITS")
+        shotsLeftLabel = QtWidgets.QLabel("SHOTS LEFT")
+
+        topLayout = QtWidgets.QHBoxLayout()
+        topLayout.addWidget(shoot)
+        topLayout.addWidget(self.hits)
+        topLayout.addWidget(hitsLabel)
+        topLayout.addWidget(self.shotsLeft)
+        topLayout.addWidget(shotsLeftLabel)
+        topLayout.addStretch(1)
+        topLayout.addWidget(restart)
+
+        leftLayout = QtWidgets.QVBoxLayout()
+        leftLayout.addWidget(angle)
+        leftLayout.addWidget(force)
+
+        gridLayout = QtWidgets.QGridLayout()
+        gridLayout.addWidget(quit, 0, 0)
+        gridLayout.addLayout(topLayout, 0, 1)
+        gridLayout.addLayout(leftLayout, 1, 0)
+        gridLayout.addWidget(self.cannonField, 1, 1, 2, 1)
+        gridLayout.setColumnStretch(1, 10)
+        self.setLayout(gridLayout)
+
+        angle.setValue(60)
+        force.setValue(25)
+        angle.setFocus()
+
+        self.newGame()
+
+    @QtCore.Slot()
+    def fire(self):
+        if self.cannonField.gameOver() or self.cannonField.isShooting():
+            return
+        self.shotsLeft.display(self.shotsLeft.intValue() - 1)
+        self.cannonField.shoot()
+
+    @QtCore.Slot()
+    def hit(self):
+        self.hits.display(self.hits.intValue() + 1)
+        if self.shotsLeft.intValue() == 0:
+            self.cannonField.setGameOver()
+        else:
+            self.cannonField.newTarget()
+
+    @QtCore.Slot()
+    def missed(self):
+        if self.shotsLeft.intValue() == 0:
+            self.cannonField.setGameOver()
+
+    @QtCore.Slot()
+    def newGame(self):
+        self.shotsLeft.display(15)
+        self.hits.display(0)
+        self.cannonField.restartGame()
+        self.cannonField.newTarget()
+
+
+app = QtWidgets.QApplication(sys.argv)
+board = GameBoard()
+board.setGeometry(100, 100, 500, 355)
+board.show()
+sys.exit(app.exec_())