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%!TEX program=xelatex

\documentclass{oblivoir}

\usepackage{tikz}

\usetikzlibrary{calc}

\tikzstyle{solid node}=[circle,draw,inner sep=.75,fill=black]

\begin{document}

tikz로 그리기:

%% Delek game: variation

\begin{tikzpicture}[>=stealth,font=\scriptsize]

\tikzstyle{level 1}=[level distance=15mm,sibling distance=30mm]

%\tikzstyle{level 2}=[level distance=15mm,sibling distance=30mm]

\tikzstyle{level 3}=[level distance=10mm,sibling distance=20mm]

% tree

\node(0)[solid node]{}

child[grow=left,level distance=25mm]{

  edge from parent [->] node [above,yshift=-1pt] {$A$}

}

child[grow=down]{node(1)[solid node]{}

  child{node(1-1)[solid node]{}

    child{edge from parent [->] node [left] {$\ell$}}

    child{edge from parent [->] node [right] {$r$}}

    edge from parent [->] node [left] {$L$}

  }

  child{node(1-2)[solid node]{}

    child{edge from parent [->] node [left] {$\ell$}}

    child{edge from parent [->] node [right] {$r$}}

    edge from parent [->] node [right] {$R$}

  }

  edge from parent [->] node [right,xshift=-2pt] {$D$}

}

;

% information sets                        %% ----->  \usetikzlibrary{calc}

\draw [thick,dotted] (1-1) to (1-2) node [yshift=5pt] at ($(1-1)!.5!(1-2)$) {2};

% owners

\node [right] at (0) {1};

\node [left,yshift=3pt] at (1) {1};

% payoffs

\node[left]at(0-1){(2,2)};

\node [below] at (1-1-1) {(4,2)};

\node [below] at (1-1-2) {(1,1)};

\node [below] at (1-2-1) {(3,2)};

\node [below] at (1-2-2) {(0,3)};

\end{tikzpicture}

\end{document}