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afterthewaterloocampaign,napoleonwasbanished(流放)ontoalonelyislandnamedsthelenainsouthatlantic.hebecameaprisonerforlife.facingthevastsea,healwaysthoughtofescapingfromtheisland,butthatwasimpossible.heknewnothingaboutthetopography(地形)oftheisland!
onceagoodfriendofhiswenttoseehim.sincetherewaalwayssomeonekeepingwatchonthem,theytalkedaboutonlytheolddays.whentheyparted,thefriendtookoutasetofchessmadeoftuskandnephrite(软玉),andsaidtonapoleon,"igivethistoyou.maybeitwillbeofsomehelp."napoleonlikeditverymuch.heusedtoplaywiththechessmen(棋子)andstudychessmanuals(棋谱),topassthelastdaysofhislife.
afterhisdeath,manyofthethingshehadeverusedwereauctioned(拍卖).thesetofchesswasalsosoldandresoldseveraltimesatveryhighprices.finallyitwasthenationalmuseuminfrance.whenthestaffmemberswerecleaningthechessmen,theyfoundthebottomofblackkingcouldbetwistedoff(拧开).theyopeneditand,totheirgreatsurprise,inittherewasadetailedmapabouthowtoescapefromtheisland.itwasagreatpitythatnapoleonhadneverdiscoveredthesecret,andthushenulified(使......无用)hisfriend'seffort.