Added retrograde handout

Advanced/Retrograde Analysis/main.tex

@@ -0,0 +1,130 @@
+% use [nosolutions] flag to hide solutions.
+% use [solutions] flag to show solutions.
+\documentclass[
+	solutions,
+	shortwarning
+]{../../resources/ormc_handout}
+
+\usepackage{chessfss}
+\usepackage{chessboard}
+\usepackage{xcolor}
+\usepackage{anyfontsize}
+\usepackage{afterpage}
+\usepackage[hang]{footmisc}
+
+
+\def\stars#1#2{%
+	\def\oncolor{\color{purple}}%
+	\def\offcolor{\color{black!40!white}}%
+	%
+	\count255=1%
+	\count254=#2%
+	\advance\count254 by -1%
+	\ifnum #1 > 0
+		% The $$ are required around \bigstar.
+		% the special \odot chess piece breaks
+		% star sizing if they are ommited.
+		\loop
+			{\oncolor $\bigstar$}%
+		\ifnum\count255 < #1
+		\advance\count255 by 1
+		\repeat%
+	\else%
+		{\oncolor $\bigstar$}%
+	\fi%
+	%
+	\ifnum \count255 < #2%
+		\loop
+			{\offcolor $\bigstar$}%
+		\ifnum\count255 < \count254
+		\advance\count255 by 1
+		\repeat%
+	\fi%
+}
+
+\def\difficulty#1#2{
+	\textbf{Difficulty:} \stars{#1}{#2} \par
+	\vspace{1mm}
+}
+
+\def\difficultynote#1#2#3{
+	\textbf{Difficulty:} \stars{#1}{#2} ~ #3\par
+	\vspace{1mm}
+}
+
+
+\setchessboard{
+	showmover=false,
+	borderwidth=0.5mm,
+	label=false,
+	labelleft=true,
+	labelbottom=true,
+	normalboard,
+	hlabelformat=\arabic{ranklabel},
+	vlabelformat=\Alph{filelabel}
+}
+
+\makeatletter
+\cbDefineNewPiece{white}{U}
+{\raisebox{1.75mm}{\cfss@whitepiececolor
+$\odot$}}
+{\BlackEmptySquare%
+\makebox[0pt][r]{\cfss@whitepiececolor
+\raisebox{1.75mm}{\makebox[1em]{$\odot$}}}}
+
+\long\def\manyboards#1{
+	\if@solutions
+		\chessboard[setpieces = {#1}]
+		\hfill
+		\chessboard[setpieces = {#1}]
+	\else
+		\vfill
+		\chessboard[setpieces = {#1}]
+		\hfill
+		\chessboard[setpieces = {#1}]
+		\vfill
+		\chessboard[setpieces = {#1}]
+		\hfill
+		\chessboard[setpieces = {#1}]
+	\fi
+}
+\makeatother
+
+
+
+
+\uptitlel{Advanced 2}
+\uptitler{Winter 2022}
+\title{Retrograde Analysis}
+\subtitle{
+	Prepared by Mark on \today{} \\
+	Based on books\footnotemark{} by Raymond Smullyan
+}
+
+\begin{document}
+
+	\maketitle
+
+	\footnotetext[1]{
+		Most of the easy problems in this handout are from \textit{The Chess Mysteries of Sherlock Holmes}.\\
+		The rest are from \textit{The Chess Mysteries of the Arabian Knights}.
+	}
+
+
+	\input{parts/intro}
+
+
+	\section{Simple problems}
+	\input{parts/easy}
+
+
+	\section{Harder problems}
+	\input{parts/medium}
+
+	\section{Very difficult problems}
+	\input{parts/hard}
+
+	\chessboard \hfill \chessboard \par
+	\chessboard \hfill \chessboard \par
+	\chessboard \hfill \chessboard \par
+\end{document}