diff --git a/.gitignore b/.gitignore
index 5cecb10..4adf5dc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,8 @@
 Spieleabend.psd
 manual.pdf
 manual_compressed.pdf
+raetsel/picross.pdf
+raetsel/network.pdf
 zeitplan.pdf
 faltblatt.pdf
 PoSo/
diff --git a/.latexmkrc b/.latexmkrc
index 1ebef42..15cc73f 100644
--- a/.latexmkrc
+++ b/.latexmkrc
@@ -1,4 +1,9 @@
-@default_files = ('timetable/zeitplan.tex', 'manual.tex');
+@default_files = (
+	'raetsel/picross.tex',
+	'raetsel/network.tex',
+	'timetable/zeitplan.tex',
+	'manual.tex',
+);
 
 # descriptions stolen from https://collaborating.tuhh.de/alex/latex-git-cookbook/-/blob/4174942b6674588d016189c708327dccbaac5b8d/.latexmkrc
 
diff --git a/manual.tex b/manual.tex
index db5b570..99c7625 100644
--- a/manual.tex
+++ b/manual.tex
@@ -69,10 +69,11 @@
 \include{texte/veranstaltungen}
 \include{texte/studienalltag}
 \include{texte/moduluebersicht}
+\include{texte/scrumwitch}
+\include{texte/raetsel}
 \include{texte/werbung}
 \include{texte/links}
 % \addchap{Notizen}\mbox{}
-\include{texte/raetsel}
 \include{texte/campusplan}
 \include{cover/back}
 
diff --git a/raetsel/network.tex b/raetsel/network.tex
new file mode 100644
index 0000000..3ff85d6
--- /dev/null
+++ b/raetsel/network.tex
@@ -0,0 +1,56 @@
+\documentclass[class=minimal,border=0pt]{standalone}
+
+\usepackage{tikz}
+\usepackage{fontspec}
+
+\setmainfont[
+  Scale=0.90,
+  BoldFeatures={Scale=1.0}
+]{Open Sans}
+
+\begin{document}
+
+\begin{tikzpicture}[
+    every node/.style={circle, fill=black, minimum size=3mm},
+    start/.style={draw=black, very thick, fill=none, minimum size=6mm, node font=\bfseries},
+    end/.style={draw=black, double, very thick, fill=none, minimum size=7mm, node font=\bfseries}
+]
+  \node [start] (S) at  (0,-2)     {?};
+
+  \node [draw]  (a) at  (0,-1)     {}  edge    [dashed]    (S);
+  \node [draw]  (b) at  (0,-0)     {}  edge    [-]         (a);
+  \node [draw]  (c) at  (1,-1)     {}  edge    [-]         (a);
+  \node [draw]  (d) at  (2,0)      {}  edge    [-]         (b)
+                                       edge    [-]         (c);
+
+  \node [draw]  (e) at  (0,-3)     {}  edge    [dashed]    (S);
+  \node [draw]  (f) at  (0,-5.5)   {}  edge    [-]         (e);
+  \node [draw]  (g) at  (4.5,-5.5) {}  edge    [-]         (f);
+  \node [draw]  (h) at  (4.5,-2)   {}  edge    [-]         (g);
+  \node [draw]  (i) at  (4.5,-1)   {}  edge    [-]         (h);
+
+  \node [draw]  (j) at  (1,-3)     {}  edge    [dashed]    (S)
+                                       edge    [-]         (e);
+  \node [draw]  (k) at  (1,-5)     {}  edge    [-]         (j);
+  \node [draw]  (l) at  (2,-4)     {}  edge    [-]         (k);
+  \node [draw]  (m) at  (3,-5)     {}  edge    [-]         (k);
+  \node [draw]  (n) at  (3,-4)     {}  edge    [-]         (l)
+                                       edge    [-]         (m);
+  \node [draw]  (o) at  (3,-3)     {}  edge    [-]         (n);
+  \node [draw]  (p) at  (4,-3)     {}  edge    [-]         (n);
+  \node [draw]  (q) at  (3,-2)     {}  edge    [-]         (o)
+                                       edge    [-]         (p);
+  \node [draw]  (v) at  (4,-5)     {}  edge    [-]         (p);
+  \node [draw]  (r) at  (1,-2)     {}  edge    [-]         (e)
+                                       edge    [-]         (n);
+  \node [draw]  (t) at  (2,-1)     {}  edge    [-]         (r);
+  \node [draw]  (u) at  (2,-2)     {}  edge    [-]         (t)
+                                       edge    [-]         (q);
+  
+  \node [end]   (end) at (3,-1)    {}  edge    [-]         (d)
+                                       edge    [-]         (i)
+                                       edge    [-]         (q);
+  \node [draw]  (w) at  (4,0)      {}  edge    [-]         (end);
+\end{tikzpicture}
+
+\end{document}
diff --git a/raetsel/picross.tex b/raetsel/picross.tex
new file mode 100644
index 0000000..249a3c2
--- /dev/null
+++ b/raetsel/picross.tex
@@ -0,0 +1,73 @@
+\documentclass[class=minimal,border=0pt]{standalone}
+
+\usepackage{tikz}
+\usepackage{fontspec}
+
+\setmainfont[
+  Scale=0.90,
+  BoldFeatures={Scale=1.0}
+]{Open Sans}
+
+\def\cols{
+    {},
+    {},
+    {},
+    {2},
+    {5},
+    {1,2,1},
+    {2,1,2},
+    {16},
+    {2,1,2},
+    {1,3,1},
+    {5},
+    {3},
+    {},
+    {},
+    {},
+    {}
+}
+
+% (sublists have to be REVERSED so the for loop makes sense!!!)
+\def\rows{
+    {1},
+    {3},
+    {5},
+    {1},
+    {3,1},
+    {3,1,1},
+    {3,1,3},
+    {1,1,3},
+    {1,1,1},
+    {1,1,1},
+    {2,1},
+    {2},
+    {1},
+    {3},
+    {3},
+    {1}
+}
+
+\begin{document}
+
+\begin{tikzpicture}[
+    every node/.style={rectangle, draw=black, semithick, minimum size=5mm, node font=\bfseries},
+    num/.style={draw=none, minimum size=4mm}
+]
+  \node
+    foreach \list [count=\x] in \cols
+      foreach \val [count=\y] in \list
+        [num] at (\x/2, 0.35*\y+0.15) {\val};
+  \node
+    foreach \list [count=\y] in \rows
+      foreach \val [count=\x] in \list
+        [num] at (-0.3*\x-0.2, 0.5-\y/2) {\val};
+
+  % grid
+  \node
+    foreach \a [count=\y] in \rows
+      foreach \b [count=\x] in \cols
+        at (\x/2-0.5, 0.5-\y/2) {};
+
+\end{tikzpicture}
+
+\end{document}
diff --git a/texte/raetsel.tex b/texte/raetsel.tex
index e69de29..6968e1c 100644
--- a/texte/raetsel.tex
+++ b/texte/raetsel.tex
@@ -0,0 +1,137 @@
+%\cleardoubleevenemptypage
+
+\ifcase\numexpr \modulo{\value{page}}{2} \relax
+% don't add any extra pages
+\or
+\hbox{}
+\vspace{5mm}
+\begin{center}
+\tiny
+--- This page is unintentionally left blank ---
+\vfill
+:P
+\end{center}
+\newpage
+\fi
+
+
+\addchap{Rätsel}
+
+Kennst du Picross oder Nonogramm (oder eine ganze Sammlung von weiteren Begriffen)?
+In diesem Logikrätsel ist ein Pixelbild versteckt.
+An jeder Zeile und Spalte steht nur, wie viele aufeinanderfolgende ausgefüllte Pixel es in der Reihe gibt.
+Dazwischen können jeweils beliebig viele unausgefüllte liegen.
+
+\vfill
+% no centering, the image is already off center because the numbers are only on one side of the grid
+\includegraphics[width=.95\textwidth]{raetsel/picross}
+
+\vspace{3mm}
+
+
+\pagebreak
+
+Es sind die 1960er Jahre, du arbeitest mit einem Kommilitonen an einem ersten Prototypen für miteinander vernetzte Computer.
+Der Algorithmus ist noch recht simpel.
+Zu simpel: denn jeder Rechner schickt von einer Verbindung in der einen Sekunde empfangene Nachrichten in der nächsten Sekunde einfach blind an alle anderen Verbindungen weiter.
+Wenn eine Nachricht aber gleichzeitig aus mehr als einer Verbindung eingeht,
+ crasht der Rechner und ist erst in der nächsten Sekunde wieder einsatzfähig --
+ ohne das soeben Empfangene weiterzusenden.
+\\
+Du versuchst natürlich, deinem Kommilitonen das als Nachricht auf den einzigen Rechner mit aktivierten Logs zu schicken.
+Aber den zu erreichen gestaltet sich erstaunlich schwierig,
+ denn du hast nur ein Kabel, und es reicht nur zu drei anderen Rechnern...
+Mit welcher Verbindung kommt die Nachricht sicher ans Ziel -- ohne dieses zu crashen?
+
+\vfill%
+
+\begin{minipage}{.2\textwidth}
+\vfill
+
+\[t\]
+
+\begin{tikzpicture}[
+    every node/.style={circle, draw, fill=black, inner sep=1pt, minimum size=2.5mm},
+]
+  \node [double] (a) at  (0.5, 0.25)  {}  edge    [<-]        (0,0.25);
+  \node []       (b) at  (1.25,0   )  {}  edge    [-]         (a)
+                                          edge    [-]         (1.75,0);
+  \node []       (c) at  (1.25,0.5 )  {}  edge    [-]         (a)
+                                          edge    [-]         (1.75,0.5);
+\end{tikzpicture}
+
+\vspace{1mm}
+
+\[t+1\]
+
+\begin{tikzpicture}[
+    every node/.style={circle, draw, fill=black, inner sep=1pt, minimum size=2.5mm},
+]
+  \node []       (a) at  (0.5, 0.25)  {}  edge    [-]         (0,0.25);
+  \node [double] (b) at  (1.25,0   )  {}  edge    [<-]        (a)
+                                          edge    [-]         (1.75,0);
+  \node [double] (c) at  (1.25,0.5 )  {}  edge    [<-]        (a)
+                                          edge    [-]         (1.75,0.5);
+\end{tikzpicture}
+
+
+\vspace{6mm}
+
+
+\[t\]
+
+\begin{tikzpicture}[
+    every node/.style={circle, draw, fill=black, inner sep=1pt, minimum size=2.5mm},
+]
+  \node [double]   (b) at  (0.5, 0   )  {}  edge    [<-]        (0,0);
+  \node [double]   (c) at  (0.5, 0.5 )  {}  edge    [<-]        (0,0.5);
+  \node []         (d) at  (1.25,0.25)  {}  edge    [-]         (b)
+                                            edge    [-]         (c);
+  \node []         (e) at  (1.75,0.25)  {}  edge    [-]         (d)
+                                            edge    [-]         (2.25,0.25);
+\end{tikzpicture}
+
+\vspace{1mm}
+
+\[t+1\]
+
+\begin{tikzpicture}[
+    every node/.style={circle, draw, fill=black, inner sep=1pt, minimum size=2.5mm},
+    cross/.style={path picture={
+      \draw[black]
+    (path picture bounding box.south east) -- (path picture bounding box.north west) (path picture bounding box.south west) -- (path picture bounding box.north east);
+	}},
+    crashed/.style={draw, cross, thick, fill=none},
+]
+  \node []         (b) at  (0.5, 0   )  {}  edge    [-]         (0,0);
+  \node []         (c) at  (0.5, 0.5 )  {}  edge    [-]         (0,0.5);
+  \node [crashed]  (d) at  (1.25,0.25)  {}  edge    [<-]        (b)
+                                            edge    [<-]        (c);
+  \node []         (e) at  (1.75,0.25)  {}  edge    [-]         (d)
+                                            edge    [-]         (2.25,0.25);
+\end{tikzpicture}
+
+\vspace{1mm}
+
+\[t+2\]
+
+\begin{tikzpicture}[
+    every node/.style={circle, draw, fill=black, inner sep=1pt, minimum size=2.5mm},
+]
+  \node []         (b) at  (0.5, 0   )  {}  edge    [-]         (0,0);
+  \node []         (c) at  (0.5, 0.5 )  {}  edge    [-]         (0,0.5);
+  \node []         (d) at  (1.25,0.25)  {}  edge    [-]         (b)
+                                            edge    [-]         (c);
+  \node []         (e) at  (1.75,0.25)  {}  edge    [-]         (d)
+                                            edge    [-]         (2.25,0.25);
+\end{tikzpicture}
+
+
+\vfill
+
+\end{minipage}%
+%
+\hfill%
+\begin{minipage}{.75\textwidth}
+\includegraphics[width=\textwidth]{raetsel/network}
+\end{minipage}
diff --git a/texte/scrumwitch.tex b/texte/scrumwitch.tex
new file mode 100644
index 0000000..ac0f7bc
--- /dev/null
+++ b/texte/scrumwitch.tex
@@ -0,0 +1,63 @@
+
+\newcommand\scrumwitch{
+	\thispagestyle{empty}
+	\hbox{}
+	\vfill
+	\begin{center}
+	\begin{minipage}{.7\textwidth}
+	\centering
+	In the beginning God created the heaven and the earth.
+	And the earth was without form, and void;
+	 and it was a static void, and it was private.
+	And God said: \enquote{It is not good that the void should be private;
+	 I will make it protected,
+	 so it can be enjoyed by everyone, and no harm shall befall it.}
+
+	[...]
+
+	And God said: \enquote{Let the earth sprout a great many paradigms and programming patterns,
+	 and binary trees bearing random number generators in which is their seed,
+	 each according to its kind.}
+	And it was so.
+	And God saw that it was good.
+	And there was evening and there was morning; the third sprint.
+	\end{minipage}
+	\end{center}
+
+	\hfill\textit{--- the SCRUM--Witch, citing her scripture}
+	\vfill
+}
+
+\newcommand\unintentional{
+	\hbox{}
+	\vspace{5mm}
+	\begin{center}
+	\tiny
+	--- This page is unintentionally left blank ---
+	\vfill
+	:P
+	\end{center}
+}
+
+% Fill with empty pages here so we don't have empty pages immediately before the cover
+% Assuming there are n*4 pages of content left before the back cover,
+% our target is {page num mod 4 = 0} – if it is anything else,
+% fill the empty space with nonsense and a cheeky quote
+\ifcase\numexpr \modulo{\value{page}}{4} \relax
+% don't add any extra pages
+\or
+
+\unintentional
+\newpage
+\scrumwitch
+\newpage
+\thispagestyle{empty}
+\unintentional
+\or
+\thispagestyle{empty}
+\unintentional
+\newpage
+\scrumwitch
+\or
+\scrumwitch
+\fi