I have problems rebuilding a complex table for my training plan.
A filled macrocycle from the book Training for Climbing looks like:

I tried to use tabularx and subtables for the fine grid lines, but it crashs. Here is a code example (without the subtables):
\documentclass[11pt,a4paper,landscape]{scrartcl}
\usepackage[left=1.5cm,right=1cm,top=2cm,bottom=1cm]{geometry}
\usepackage{tabularx}
\usepackage{array,booktabs,pgffor}
\newcommand{\numarr}[1]{%
\foreach \n in {1,...,#1}{\footnotesize\ \n}
}
\newcommand{\emarr}[1]{%
\foreach \n in {1,...,#1}{\footnotesize\ \phantom{x}}
}
\newcolumntype{Y}{>{\centering\arraybackslash}X}
\renewcommand{\arraystretch}{1.3}
\begin{document}
\begin{tabularx}{.4\textwidth}{@{}r|Y|Y|Y@{}}
Year & \multicolumn{3}{c}{Header} \
\hline
\phantom{x2022x}%
& \multicolumn{3}{c}{}%
\[1cm]
\hline
month & Jan & Feb & Mär
\
\hline
weak%
&\numarr{5}%
&\numarr{4}%
&\numarr{4}%
\
\hline
Fokus
&grid&grid&grid
\[3em]
\hline
&grid&grid&grid
\[3em]
\hline
&&&
\[8em]
\hline
\end{tabularx}
\end{document}
I would be really happy if someone has a hint or a similar example.
Thank in advance! Tommy

