diff --git a/README.md b/README.md
index 59f7965..74a06ea 100644
--- a/README.md
+++ b/README.md
@@ -33,9 +33,12 @@ If you find mistakes, please open an issue or fix them yourself and open a PR.
 - [Systems Programming and Computer Architecture Summary (EN)](./semester3/spca/spca-summary.pdf) Authors: Robin Bacher, Janis Hutz
 
 ### Semester 4
+#### Probability & Statistics
+- [Probability & Statistics Cheat-Sheet (TBD)](./semester4/ps/ps-jh/probability-and-statistics-cheatsheet.pdf) Author: Janis Hutz
+- [Probability & Statistics Cheat-Sheet (TBD)](./semester4/ps/ps-rb/main.pdf) Author: Robin Bacher
+#### Other Courses
 - [Formal Methods & Functional Programming Summary (EN)](./semester4/fmfp/formal-methods-functional-programming-summary.pdf)
 - [Data Modelling & Databases Summary (EN)](./semester4/dmdb/data-modelling-databases-summary.pdf)
-- [Probability & Statistics Cheat-Sheet (TBD)](./semester4/ps/probability-and-statistics-cheatsheet.pdf)
 - [Computer Networks (EN)](./semester4/cn/computer-networks-summary.pdf)
 
 
diff --git a/semester3/analysis-ii/cheat-sheet-rb/main.pdf b/semester3/analysis-ii/cheat-sheet-rb/main.pdf
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diff --git a/semester4/ps/probability-and-statistics-cheatsheet.pdf b/semester4/ps/ps-jh/probability-and-statistics-cheatsheet.pdf
similarity index 100%
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rename to semester4/ps/ps-jh/probability-and-statistics-cheatsheet.pdf
diff --git a/semester4/ps/probability-and-statistics-cheatsheet.tex b/semester4/ps/ps-jh/probability-and-statistics-cheatsheet.tex
similarity index 100%
rename from semester4/ps/probability-and-statistics-cheatsheet.tex
rename to semester4/ps/ps-jh/probability-and-statistics-cheatsheet.tex
diff --git a/semester4/ps/ps-rb/main.pdf b/semester4/ps/ps-rb/main.pdf
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diff --git a/semester4/ps/ps-rb/main.tex b/semester4/ps/ps-rb/main.tex
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@@ -0,0 +1,15 @@
+\documentclass[a4paper,10pt]{article}
+\usepackage[landscape, left=0.75cm, top=1cm, right=0.75cm, bottom=1.5cm, footskip=15pt]{geometry}
+\input{util/setup.tex}
+\input{util/helpers.tex}
+
+\title{Probability \& Statistics}
+\author{Robin Bacher}
+\date{HS 2026}
+
+\begin{document}
+
+\section{Intro}
+\input{parts/00_intro.tex}
+
+\end{document}
diff --git a/semester4/ps/ps-rb/parts/00_intro.tex b/semester4/ps/ps-rb/parts/00_intro.tex
new file mode 100644
index 0000000..e69de29
diff --git a/semester4/ps/ps-rb/util/helpers.tex b/semester4/ps/ps-rb/util/helpers.tex
new file mode 100644
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--- /dev/null
+++ b/semester4/ps/ps-rb/util/helpers.tex
@@ -0,0 +1,77 @@
+% TC boxes
+\tcbset {
+  base/.style={
+    boxrule=0mm,
+    left=1.75mm,
+    arc=2mm,
+    colbacktitle=black!10!white, 
+    coltitle=black, 
+    fonttitle=\bfseries,
+    toptitle=0.75mm, 
+    bottomtitle=0.25mm,
+    title={#1}
+  }
+}
+\newtcolorbox{subbox}[1]{
+  colframe=black!20!white,
+  base={#1}
+}
+
+% Math helpers
+\def\limxo{\lim_{x\to 0}}
+\def\limxi{\lim_{x\to\infty}}
+\def\limxn{\lim_{x\to-\infty}}
+\def\sumk{\sum_{k=1}^\infty}
+\def\sumn{\sum_{n=0}^\infty}
+\def\dx{\text{ d}x}
+
+\def\R{\mathbb{R}}
+\def\Q{\mathbb{Q}}
+\def\N{\mathbb{N}}
+\def\C{\mathbb{C}}
+\def\Z{\mathbb{Z}}
+
+\def\S{\mathcal{S}}
+
+\def\Def{\overset{\text{def.}}{\iff}}
+
+\def \cgeq{\succcurlyeq}
+\def \cleq{\preccurlyeq}
+
+\def \limn{\lim\limits_{n \to \infty}}
+\def \limi{\liminf\limits_{n \to \infty}}
+\def \lims{\limsup\limits_{n \to \infty}}
+
+\def \ord{\text{ord}}
+\def \tr{\text{Tr}}
+\def \sep{\ |\ }
+
+\def \iffdef{\overset{\text{def}}{\iff}}
+
+\def \dfd#1{\frac{\partial f}{\partial x_#1}}
+\def \sdfd#1{\partial_{x_#1}f}
+\def \ssdfd#1{\partial_#1f}
+\def \dd#1#2{\frac{\partial_#1}{\partial x_#2}}   % to replace f
+
+% Titles
+\def \definition{\colorbox{lightgray}{Def} }
+\def \notation{\colorbox{lightgray}{Notation} }
+\def \remark{\colorbox{lightgray}{Remark} }
+\def \theorem{\colorbox{lightgray}{Th.} }
+\def \lemma{\colorbox{lightgray}{Lem.} }
+\def \method{\colorbox{lightgray}{Method} }
+
+
+% For intuiton and less important notes
+\def \subtext#1{
+    \color{gray}\footnotesize
+    #1
+    \color{black}\normalsize
+}
+
+% inside tc boxes
+\def \smalltext#1{
+    \footnotesize
+    #1
+    \normalsize
+}
diff --git a/semester4/ps/ps-rb/util/setup.tex b/semester4/ps/ps-rb/util/setup.tex
new file mode 100644
index 0000000..290f538
--- /dev/null
+++ b/semester4/ps/ps-rb/util/setup.tex
@@ -0,0 +1,41 @@
+\usepackage{flowfram}
+\ffvadjustfalse
+\setlength{\columnsep}{1cm}
+\Ncolumn{3}
+
+% TCB boxes for important stuff
+\usepackage[many]{tcolorbox}
+
+% Mathematical typesetting & symbols
+\usepackage{amsthm, mathtools, amssymb} 
+\usepackage{marvosym, wasysym}
+\allowdisplaybreaks
+
+% Tables
+\usepackage{tabularx, multirow}
+\usepackage{booktabs}
+\renewcommand*{\arraystretch}{2}
+
+% Make enumerations more compact
+\usepackage{enumitem}
+\setitemize{itemsep=0.5pt}
+\setenumerate{itemsep=0.75pt}
+
+% To include sketches & PDFs
+\usepackage{graphicx}
+
+% For hyperlinks
+\usepackage{hyperref}
+\hypersetup{ colorlinks=true }
+
+% Fomatting
+\usepackage{multicol}
+\usepackage{parskip}    % Disables new paragraph indent
+
+% Custom resets
+\renewcommand{\arraystretch}{1.3}           % Decrease row height
+\renewcommand{\familydefault}{\sfdefault}
+
+% Flexible graphs / visualisations inside latex
+\usepackage{tikz}
+\usetikzlibrary{positioning, arrows.meta, calc, matrix}
\ No newline at end of file