Richard Fortman
... that checkers champion Richard Fortman learned the game from his father, a telegraphist who would play the game with other operators by memorizing the board to avoid detection?
... that <a href="./English_draughts" id="mwGeI" rel="mw:WikiLink" title="English draughts">checkers</a> champion <b id="mwGeM"><a href="./Richard_Fortman" id="mwGeQ" rel="mw:WikiLink" title="Richard Fortman">Richard Fortman</a></b> learned the game from his father, a <a href="./Telegraphist" id="mwGeU" rel="mw:WikiLink" title="Telegraphist">telegraphist</a> who would play the game with other operators by memorizing the board to avoid detection?