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+\def\startposition{
+\inifulldiagram
+\gofontsize{10}
+\pos{d}{5}=\black{.}
+\pos{d}{4}=\white{.}
+\pos{e}{5}=\white{.}
+\pos{e}{4}=\black{.}
+\centerline{\showfulldiagram}\caption{Othello start position}
+}
+
+\def\cornerpositions{
+\inifulldiagram
+\gofontsize{10}
+\pos{b}{2}=\neutral{65}
+\pos{b}{7}=\neutral{65}
+\pos{g}{2}=\neutral{65}
+\pos{g}{7}=\neutral{65}
+\pos{a}{2}=\neutral{66}
+\pos{a}{7}=\neutral{66}
+\pos{b}{1}=\neutral{66}
+\pos{b}{8}=\neutral{66}
+\pos{g}{8}=\neutral{66}
+\pos{g}{1}=\neutral{66}
+\pos{h}{7}=\neutral{66}
+\pos{h}{2}=\neutral{66}
+\centerline{\showfulldiagram}\caption{Special positions around the corners} \label{cornerpositions}
+}
+
+\def\makingamove{
+\inifulldiagram
+\gofontsize{10}
+\pos{d}{5}=\black{.}
+\pos{d}{4}=\white{.}
+\pos{e}{5}=\white{.}
+\pos{e}{4}=\black{.}
+\pos{c}{4}=\neutral{65}
+\pos{d}{3}=\neutral{65}
+\pos{e}{6}=\neutral{65}
+\pos{f}{5}=\neutral{65}
+\centerline{\showfulldiagram}\caption{Black can place his first stone at these
+places}\label{makingamove}
+}
+
+\def\validmoves{
+\inifulldiagram
+\gofontsize{10}
+\pos{d}{5}=\black{.}
+\pos{d}{4}=\white{.}
+\pos{e}{5}=\white{.}
+\pos{e}{4}=\black{.}
+\pos{d}{3}=\black{.}
+\pos{c}{3}=\white{.}
+\centerline{\showfulldiagram}\label{validmoves}\caption{Opening
+c4,c3}
+}
+
+\def\fliponlyonce{
+\inifulldiagram \gofontsize{10} \pos{c}{3}=\white{.}
+\pos{d}{3}=\white{.} \pos{e}{3}=\white{.} \pos{f}{3}=\white{.}
+\pos{f}{4}=\white{.} \pos{f}{5}=\white{.} \pos{f}{6}=\white{.}
+\pos{e}{6}=\white{.} \pos{d}{6}=\white{.} \pos{c}{6}=\white{.}
+\pos{d}{4}=\black{.} \pos{e}{4}=\black{.} \pos{d}{5}=\black{.}
+\pos{e}{5}=\black{.}
+\centerline{\showfulldiagram}\caption{Stones do not flip recursively}\label{fliponlyonce} }
+
+\def\stablestones{
+\inifulldiagram \gofontsize{10} \pos{a}{1}=\black{.}
+\pos{b}{1}=\black{.} \pos{a}{2}=\black{.} \pos{a}{3}=\black{.}
+\pos{b}{2}=\black{.} \pos{a}{4}=\black{.} \pos{h}{1}=\white{.}
+\pos{h}{2}=\white{.} \pos{g}{1}=\white{.} \pos{g}{2}=\white{.}
+\pos{g}{3}=\white{.} \pos{h}{3}=\white{.} \pos{f}{1}=\white{.}
+\centerline{\showfulldiagram}\caption{Example of stable
+stones}\label{stablestones} }
+
+\def\maximumdisk{
+\inifulldiagram
+\gofontsize{10}
+\pos{a}{3}=\white{.}
+\pos{a}{4}=\white{.}
+\pos{a}{5}=\white{.}
+\pos{a}{6}=\white{.}
+\pos{b}{3}=\white{.}
+\pos{b}{4}=\white{.}
+\pos{b}{5}=\white{.}
+\pos{b}{6}=\white{.}
+\pos{c}{1}=\white{.}
+\pos{c}{2}=\white{.}
+\pos{c}{3}=\white{.}
+\pos{c}{4}=\white{.}
+\pos{c}{5}=\white{.}
+\pos{c}{6}=\white{.}
+\pos{c}{7}=\white{.}
+\pos{c}{8}=\white{.}
+\pos{d}{1}=\white{.}
+\pos{d}{2}=\white{.}
+\pos{d}{3}=\white{.}
+\pos{d}{4}=\black{.}
+\pos{d}{5}=\black{.}
+\pos{d}{6}=\white{.}
+\pos{d}{7}=\white{.}
+\pos{d}{8}=\white{.}
+\pos{e}{1}=\white{.}
+\pos{e}{2}=\white{.}
+\pos{e}{3}=\white{.}
+\pos{e}{4}=\white{.}
+\pos{e}{5}=\white{.}
+\pos{e}{6}=\white{.}
+\pos{e}{7}=\white{.}
+\pos{e}{8}=\white{.}
+\pos{f}{1}=\white{.}
+\pos{f}{2}=\white{.}
+\pos{f}{3}=\white{.}
+\pos{f}{4}=\white{.}
+\pos{f}{5}=\white{.}
+\pos{f}{6}=\white{.}
+\pos{f}{7}=\white{.}
+\pos{f}{8}=\white{.}
+\pos{g}{3}=\white{.}
+\pos{g}{4}=\white{.}
+\pos{g}{5}=\white{.}
+\pos{g}{6}=\white{.}
+\pos{h}{3}=\white{.}
+\pos{h}{4}=\white{.}
+\pos{h}{5}=\white{.}
+\pos{h}{6}=\white{.}
+\centerline{\showfulldiagram}\caption{Maximum disk strategy: black to play and win (46-18)}\label{maximumdisk}
+}
+
+\def\stabledisks{
+\inifulldiagram \gofontsize{10} \pos{a}{1}=\white{.}
+\pos{a}{2}=\white{.} \pos{a}{3}=\white{.} \pos{a}{4}=\white{.}
+\pos{a}{5}=\white{.} \pos{a}{6}=\white{.} \pos{b}{1}=\white{.}
+\pos{b}{2}=\white{.} \pos{b}{3}=\white{.} \pos{b}{4}=\white{.}
+\pos{b}{5}=\white{.} \pos{b}{6}=\white{.} \pos{c}{1}=\white{.}
+\pos{c}{2}=\white{.} \pos{c}{3}=\white{.} \pos{c}{4}=\white{.}
+\pos{c}{5}=\white{.} \pos{c}{6}=\white{.} \pos{c}{7}=\white{.}
+\pos{c}{8}=\white{.} \pos{d}{1}=\white{.} \pos{d}{2}=\white{.}
+\pos{d}{3}=\white{.} \pos{d}{4}=\black{.} \pos{d}{5}=\black{.}
+\pos{d}{6}=\white{.} \pos{d}{7}=\white{.} \pos{d}{8}=\white{.}
+\pos{e}{1}=\white{.} \pos{e}{2}=\white{.} \pos{e}{3}=\white{.}
+\pos{e}{4}=\white{.} \pos{e}{5}=\white{.} \pos{e}{6}=\white{.}
+\pos{e}{7}=\white{.} \pos{e}{8}=\white{.} \pos{f}{1}=\white{.}
+\pos{f}{2}=\white{.} \pos{f}{3}=\white{.} \pos{f}{4}=\white{.}
+\pos{f}{5}=\white{.} \pos{f}{6}=\white{.} \pos{f}{7}=\white{.}
+\pos{f}{8}=\white{.} \pos{g}{3}=\white{.} \pos{g}{4}=\white{.}
+\pos{g}{5}=\white{.} \pos{g}{6}=\white{.} \pos{h}{3}=\white{.}
+\pos{h}{4}=\white{.} \pos{h}{5}=\white{.} \pos{h}{6}=\white{.}
+\centerline{\showfulldiagram}\caption{Examples of stable disks in an end game}\label{stabledisks} }
+
+
+
+\def\quietmove{\inifulldiagram
+\gofontsize{10}
+\pos{b}{5}=\black{.}
+\pos{c}{2}=\black{.}
+\pos{d}{2}=\black{.}
+\pos{e}{2}=\black{.}
+\pos{f}{2}=\black{.}
+\pos{f}{3}=\black{.}
+\pos{g}{3}=\black{.}
+\pos{g}{4}=\black{.}
+\pos{b}{3}=\white{.}
+\pos{b}{4}=\white{.}
+\pos{c}{3}=\white{.}
+\pos{c}{4}=\white{.}
+\pos{c}{5}=\white{.}
+\pos{d}{3}=\white{.}
+\pos{d}{4}=\white{.}
+\pos{d}{5}=\white{.}
+\pos{e}{3}=\white{.}
+\pos{e}{5}=\white{.}
+\pos{f}{4}=\white{.}
+\pos{f}{5}=\white{.}
+\pos{g}{5}=\white{.}
+\centerline{\showfulldiagram}\caption{Example of a quiet move}\label{quietmove}}
+
+\def\frontiermovetwo{\inifulldiagram
+\gofontsize{10}
+\pos{b}{4}=\black{.}
+\pos{b}{5}=\black{.}
+\pos{c}{2}=\black{.}
+\pos{c}{3}=\black{.}
+\pos{d}{2}=\black{.}
+\pos{d}{3}=\black{.}
+\pos{e}{2}=\black{.}
+\pos{e}{3}=\black{.}
+\pos{f}{3}=\black{.}
+\pos{f}{4}=\black{.}
+\pos{c}{4}=\white{.}
+\pos{c}{5}=\white{.}
+\pos{d}{4}=\white{.}
+\pos{d}{5}=\white{.}
+\pos{e}{4}=\white{.}
+\pos{e}{5}=\white{.}
+\centerline{\showfulldiagram}\caption{}\label{frontiermovetwo}}
+
+\def\frontierstones{\inifulldiagram
+\gofontsize{10}
+\pos{b}{3}=\black{.}
+\pos{c}{3}=\black{.}
+\pos{c}{4}=\black{.}
+\pos{d}{3}=\black{.}
+\pos{d}{4}=\black{.}
+\pos{d}{5}=\black{.}
+\pos{d}{6}=\black{.}
+\pos{d}{7}=\black{.}
+\pos{e}{3}=\black{.}
+\pos{e}{4}=\black{.}
+\pos{e}{5}=\black{.}
+\pos{f}{3}=\black{.}
+\pos{f}{4}=\black{.}
+\pos{f}{5}=\black{.}
+\pos{b}{4}=\white{.}
+\pos{b}{5}=\white{.}
+\pos{c}{5}=\white{.}
+\pos{c}{6}=\white{.}
+\pos{c}{7}=\white{.}
+\pos{e}{6}=\white{.}
+\pos{e}{7}=\white{.}
+\pos{f}{6}=\white{.}
+\centerline{\showfulldiagram}\caption{Frontiers in the beginning of the game}\label{frontierstones}}
+
+\def\mobilityexampletwo{\inifulldiagram
+\gofontsize{10}
+\pos{a}{4}=\black{.}
+\pos{b}{3}=\black{.}
+\pos{b}{4}=\black{.}
+\pos{b}{5}=\black{.}
+\pos{b}{6}=\black{.}
+\pos{c}{3}=\black{.}
+\pos{c}{6}=\black{.}
+\pos{d}{3}=\black{.}
+\pos{d}{4}=\black{.}
+\pos{d}{5}=\black{.}
+\pos{d}{6}=\black{.}
+\pos{e}{3}=\black{.}
+\pos{e}{4}=\black{.}
+\pos{e}{5}=\black{.}
+\pos{c}{4}=\white{.}
+\pos{c}{5}=\white{.}
+\centerline{\showfulldiagram}\caption{White to play and win a corner}\label{mobilityexampletwo}}
+
+\def\mobiuitween{\inifulldiagram
+\gofontsize{10}
+\pos{a}{4}=\white{.}
+\pos{b}{3}=\black{.}
+\pos{b}{4}=\black{.}
+\pos{b}{5}=\black{.}
+\pos{b}{6}=\black{.}
+\pos{c}{3}=\black{.}
+\pos{c}{6}=\black{.}
+\pos{d}{3}=\black{.}
+\pos{d}{4}=\black{.}
+\pos{d}{5}=\black{.}
+\pos{d}{6}=\black{.}
+\pos{e}{3}=\black{.}
+\pos{e}{4}=\black{.}
+\pos{e}{5}=\black{.}
+\pos{c}{4}=\white{.}
+\pos{c}{5}=\white{.}
+\pos{b}{7}=\black{.}
+\pos{a}{2}=\white{.}
+\pos{a}{3}=\white{.}
+\pos{a}{7}=\white{.}
+\pos{a}{5}=\white{.}
+\pos{a}{6}=\white{.}
+\centerline{\showfulldiagram}\caption{}\label{mobiuitween}}
+
+\def\frontiermoveone{\inifulldiagram
+\gofontsize{10}
+\pos{a}{2}=\black{.}
+\pos{b}{3}=\black{.}
+\pos{c}{1}=\black{.}
+\pos{c}{2}=\black{.}
+\pos{d}{1}=\black{.}
+\pos{d}{2}=\black{.}
+\pos{e}{1}=\black{.}
+\pos{e}{2}=\black{.}
+\pos{f}{1}=\black{.}
+\pos{f}{2}=\black{.}
+\pos{a}{4}=\white{.}
+\pos{a}{5}=\white{.}
+\pos{a}{6}=\white{.}
+\pos{a}{7}=\white{.}
+\pos{b}{4}=\white{.}
+\pos{b}{5}=\white{.}
+\pos{b}{6}=\white{.}
+\pos{b}{8}=\white{.}
+\pos{c}{3}=\white{.}
+\pos{c}{4}=\white{.}
+\pos{c}{5}=\white{.}
+\pos{c}{6}=\white{.}
+\pos{c}{7}=\white{.}
+\pos{c}{8}=\white{.}
+\pos{d}{3}=\white{.}
+\pos{d}{4}=\white{.}
+\pos{d}{5}=\white{.}
+\pos{d}{6}=\white{.}
+\pos{d}{7}=\white{.}
+\pos{d}{8}=\white{.}
+\pos{e}{3}=\white{.}
+\pos{e}{4}=\white{.}
+\pos{e}{5}=\white{.}
+\pos{e}{6}=\white{.}
+\pos{e}{7}=\white{.}
+\pos{f}{3}=\white{.}
+\pos{f}{4}=\white{.}
+\pos{f}{5}=\white{.}
+\pos{f}{6}=\white{.}
+\pos{f}{7}=\white{.}
+\centerline{\showfulldiagram}\caption{Frontier moves: h6 is devastating for black}\label{frontiermoveone}
+}
+
+\def\wedge{
+\inifulldiagram
+\gofontsize{10}
+\pos{a}{2}=\black{.}
+\pos{a}{3}=\black{.}
+\pos{a}{4}=\black{.}
+\pos{a}{5}=\black{.}
+\pos{a}{6}=\black{.}
+\pos{b}{1}=\black{.}
+\pos{b}{3}=\black{.}
+\pos{b}{4}=\black{.}
+\pos{b}{5}=\black{.}
+\pos{b}{6}=\black{.}
+\pos{c}{1}=\black{.}
+\pos{c}{2}=\black{.}
+\pos{c}{3}=\black{.}
+\pos{c}{6}=\black{.}
+\pos{d}{2}=\black{.}
+\pos{d}{5}=\black{.}
+\pos{d}{6}=\black{.}
+\pos{e}{1}=\black{.}
+\pos{e}{2}=\black{.}
+\pos{e}{4}=\black{.}
+\pos{f}{1}=\black{.}
+\pos{g}{1}=\black{.}
+\pos{c}{4}=\white{.}
+\pos{c}{5}=\white{.}
+\pos{d}{3}=\white{.}
+\pos{d}{4}=\white{.}
+\pos{e}{3}=\white{.}
+\pos{e}{5}=\white{.}
+\pos{e}{6}=\white{.}
+\pos{f}{2}=\white{.}
+\pos{f}{3}=\white{.}
+\pos{f}{4}=\white{.}
+\pos{f}{5}=\white{.}
+\centerline{\showfulldiagram}\caption{White plays a4, wedging the first column}\label{wedge}}
+
+\def\wedgetwo{\inifulldiagram
+\gofontsize{10}
+\pos{a}{3}=\black{.}
+\pos{a}{4}=\black{.}
+\pos{a}{5}=\black{.}
+\pos{a}{6}=\black{.}
+\pos{a}{7}=\black{.}
+\pos{b}{1}=\black{.}
+\pos{b}{3}=\black{.}
+\pos{b}{4}=\black{.}
+\pos{b}{5}=\black{.}
+\pos{b}{6}=\black{.}
+\pos{c}{1}=\black{.}
+\pos{c}{2}=\black{.}
+\pos{c}{3}=\black{.}
+\pos{c}{6}=\black{.}
+\pos{d}{1}=\black{.}
+\pos{d}{5}=\black{.}
+\pos{d}{6}=\black{.}
+\pos{e}{1}=\black{.}
+\pos{e}{4}=\black{.}
+\pos{f}{1}=\black{.}
+\pos{f}{2}=\black{.}
+\pos{g}{1}=\black{.}
+\pos{c}{4}=\white{.}
+\pos{c}{5}=\white{.}
+\pos{d}{2}=\white{.}
+\pos{d}{3}=\white{.}
+\pos{d}{4}=\white{.}
+\pos{e}{2}=\white{.}
+\pos{e}{3}=\white{.}
+\pos{e}{5}=\white{.}
+\pos{e}{6}=\white{.}
+\pos{f}{3}=\white{.}
+\pos{f}{4}=\white{.}
+\pos{f}{5}=\white{.}
+\centerline{\showfulldiagram}\caption{Wedging by sacrificing a corner}\label{wedgetwo}
+}
+
+\def\tempo{
+\inifulldiagram
+\gofontsize{10}
+\pos{b}{3}=\black{.}
+\pos{b}{4}=\black{.}
+\pos{b}{5}=\black{.}
+\pos{b}{6}=\black{.}
+\pos{c}{2}=\black{.}
+\pos{c}{3}=\black{.}
+\pos{c}{6}=\black{.}
+\pos{d}{2}=\black{.}
+\pos{d}{4}=\black{.}
+\pos{d}{5}=\black{.}
+\pos{d}{6}=\black{.}
+\pos{e}{2}=\black{.}
+\pos{e}{4}=\black{.}
+\pos{e}{5}=\black{.}
+\pos{e}{6}=\black{.}
+\pos{f}{2}=\black{.}
+\pos{f}{6}=\black{.}
+\pos{a}{3}=\white{.}
+\pos{a}{4}=\white{.}
+\pos{a}{5}=\white{.}
+\pos{c}{4}=\white{.}
+\pos{c}{5}=\white{.}
+\pos{d}{3}=\white{.}
+\pos{e}{3}=\white{.}
+\pos{f}{3}=\white{.}
+\pos{f}{4}=\white{.}
+\pos{f}{5}=\white{.}
+\centerline{\showfulldiagram}\caption{White to move: gaining tempo}\label{tempo}
+}
+
+\def\parity{
+\inifulldiagram
+\gofontsize{10}
+\pos{b}{5}=\black{.}
+\pos{b}{6}=\black{.}
+\pos{d}{4}=\black{.}
+\pos{d}{6}=\black{.}
+\pos{e}{3}=\black{.}
+\pos{e}{5}=\black{.}
+\pos{f}{2}=\black{.}
+\pos{f}{4}=\black{.}
+\pos{g}{1}=\black{.}
+\pos{g}{6}=\black{.}
+\pos{a}{3}=\white{.}
+\pos{a}{4}=\white{.}
+\pos{a}{5}=\white{.}
+\pos{a}{6}=\white{.}
+\pos{a}{7}=\white{.}
+\pos{b}{1}=\white{.}
+\pos{b}{3}=\white{.}
+\pos{b}{4}=\white{.}
+\pos{c}{1}=\white{.}
+\pos{c}{2}=\white{.}
+\pos{c}{3}=\white{.}
+\pos{c}{4}=\white{.}
+\pos{c}{5}=\white{.}
+\pos{c}{6}=\white{.}
+\pos{c}{7}=\white{.}
+\pos{c}{8}=\white{.}
+\pos{d}{1}=\white{.}
+\pos{d}{2}=\white{.}
+\pos{d}{3}=\white{.}
+\pos{d}{5}=\white{.}
+\pos{d}{7}=\white{.}
+\pos{d}{8}=\white{.}
+\pos{e}{1}=\white{.}
+\pos{e}{2}=\white{.}
+\pos{e}{4}=\white{.}
+\pos{e}{6}=\white{.}
+\pos{e}{7}=\white{.}
+\pos{e}{8}=\white{.}
+\pos{f}{1}=\white{.}
+\pos{f}{3}=\white{.}
+\pos{f}{5}=\white{.}
+\pos{f}{6}=\white{.}
+\pos{f}{7}=\white{.}
+\pos{f}{8}=\white{.}
+\pos{g}{2}=\white{.}
+\pos{g}{3}=\white{.}
+\pos{g}{4}=\white{.}
+\pos{g}{5}=\white{.}
+\pos{g}{8}=\white{.}
+\pos{h}{1}=\white{.}
+\pos{h}{2}=\white{.}
+\pos{h}{3}=\white{.}
+\pos{h}{4}=\white{.}
+\pos{h}{5}=\white{.}
+\pos{h}{6}=\white{.}
+\pos{h}{7}=\white{.}
+\centerline{\showfulldiagram}\caption{Black to play and win}\label{parity}}
+
+\def\paritytwo{
+\inifulldiagram
+\gofontsize{10}
+\pos{c}{5}=\black{.}
+\pos{c}{7}=\black{.}
+\pos{d}{1}=\black{.}
+\pos{d}{2}=\black{.}
+\pos{d}{3}=\black{.}
+\pos{d}{4}=\black{.}
+\pos{e}{1}=\black{.}
+\pos{e}{2}=\black{.}
+\pos{f}{2}=\black{.}
+\pos{f}{3}=\black{.}
+\pos{f}{6}=\black{.}
+\pos{f}{8}=\black{.}
+\pos{g}{3}=\black{.}
+\pos{g}{4}=\black{.}
+\pos{g}{5}=\black{.}
+\pos{g}{8}=\black{.}
+\pos{h}{3}=\black{.}
+\pos{h}{4}=\black{.}
+\pos{h}{5}=\black{.}
+\pos{h}{6}=\black{.}
+\pos{h}{7}=\black{.}
+\pos{h}{8}=\black{.}
+\pos{a}{2}=\white{.}
+\pos{a}{3}=\white{.}
+\pos{a}{4}=\white{.}
+\pos{a}{5}=\white{.}
+\pos{a}{6}=\white{.}
+\pos{a}{7}=\white{.}
+\pos{a}{8}=\white{.}
+\pos{b}{3}=\white{.}
+\pos{b}{4}=\white{.}
+\pos{b}{5}=\white{.}
+\pos{b}{6}=\white{.}
+\pos{b}{7}=\white{.}
+\pos{b}{8}=\white{.}
+\pos{c}{1}=\white{.}
+\pos{c}{2}=\white{.}
+\pos{c}{3}=\white{.}
+\pos{c}{4}=\white{.}
+\pos{c}{6}=\white{.}
+\pos{c}{8}=\white{.}
+\pos{d}{5}=\white{.}
+\pos{d}{6}=\white{.}
+\pos{d}{7}=\white{.}
+\pos{d}{8}=\white{.}
+\pos{e}{3}=\white{.}
+\pos{e}{4}=\white{.}
+\pos{e}{5}=\white{.}
+\pos{e}{6}=\white{.}
+\pos{e}{7}=\white{.}
+\pos{e}{8}=\white{.}
+\pos{f}{1}=\white{.}
+\pos{f}{4}=\white{.}
+\pos{f}{5}=\white{.}
+\pos{f}{7}=\white{.}
+\pos{g}{6}=\white{.}
+\centerline{\showfulldiagram}\caption{Black to play and draw}\label{paritytwo}}
+
+\def\overviewboard{
+\inifulldiagram
+\gofontsize{10}
+\pos{d}{5}=\black{.}
+\pos{d}{4}=\white{.}
+\pos{e}{5}=\white{23}
+\pos{e}{4}=\black{62}
+\pos{d}{3}=\neutral{43}
+\pos{b}{2}=\neutral{65}
+\pos{b}{1}=\neutral{66}
+\centerline{\showfulldiagram}\caption{All possible characters using  the Othello package}
+}
+
+\def\overviewboardcorner{
+\inifulldiagram
+\gofontsize{10}
+\pos{d}{5}=\black{.}
+\pos{d}{4}=\white{.}
+\pos{e}{5}=\white{23}
+\pos{e}{4}=\black{62}
+\pos{d}{3}=\neutral{43}
+\pos{b}{2}=\neutral{65}
+\pos{b}{1}=\neutral{66}
+\centerline{\showdiagram a-d:1-4 }\caption{The northwest corner of the overview board}
+}