JOY 5X]hYkIz k phL9̪I Y%z kZ-KiZ-KL$ЦIz {x UL$ЦIz zx UL$ЦIz yx UL$ЦIz xx UL$ЦIz x UL$ЦIz ~x UL$ЦIz }x UL$ЦIz |x UL$ЦIz sx UL$ЦIz rx U xLayout 0x U pHomeoftheFree LChapter8 xLayout 0x U P ,p>>>x xLayout 0x U x xLayout 0x U  xLayout 1x U  $Layout 1xP #(-27butthereareanumberofPDsourcesforthesamegame.Thereis  evenaversionwrittenin'C',butthebestPDversioncomesfromtheSIG/Mcatalogue.Itiscalled,simply,ADVENTURE! Px$Layout 1xP #(-27'bechosenafteryouhavehadanincarnationasaweakercharacter.  Herealso,thecharactersinteractmuchmoreanditisquitefeasible  6tofindyourselfplayingarolewhich,inapreviousgame,wasthatofanadversary! K4Bothtypesofgamehavetheirsupporters.ADVENTURE!ismuch  E.akintoamysterystory,whereasDNDowesmoretoChessandothergamesofstrategy.Ifyouhaven'tplayedeither,thentryboth! x$Layout 1xP #(-27willnothavethatmuchtroubledefeatingthemachine,ifyouare  ;$reasonablyadeptatchess.Thegameiswritteninmachine-codeand dMpotentialgameprogrammerswilllearnmuch,bydisassemblingthe  code.(What?Look,ifyoucanprogramachessalgorithm,you'regoingtohavenotroubleatallinunderstandingadisassembly!).  [DCHECKERS(orDraughtstonormalmortals)isanotherprogramlthat'saround.It'sinBasicanddoesn'tputupmuchofafight! 1However,OTHELLO(orReversi,togiveititspropername)does  K4giveyouaworthyopponent.Ifyouexaminethestrategyforthese  R;games,thiswillnotcomeastoomuchofasurprise,sinceagood  D-OTHELLOalgorithmisonethatplaysCHECKERStolose!(Thinkaboutit!).Bothprogramsgiveyouareasonableon-screendisplay. xx$Layout 1xP #(-27outbills!Whatissurprisingaboutthisprogramisthenumberof peoplewhoarepreparedtoacceptELIZA'svanilla-flavouredresponsesastherealthing! Thereisastory(probablyapocryphal)thatWeitzenbaumleftthe  programrunningonelunchtimeonhisofficecomputer.Whenhe  returned,hefoundthathissecretary,whoknewthatthiswasjusta   languageanalysisprogram,waspouringherheartouttoELIZA!Itis  nWwellknownthatsomepeoplearepreparedtodivulgethingstoa  G0machine,thattheywouldnottelltoahuman,butIamcontinuallyBastonishedbythenumberofthosetakeninbyELIZA. R;ELIZAlooksgood,butwhatisactuallyhappeningisthatthe  kTprogramistakingtheuser'skeyboardinputandanalysingitfor  S<certain'key'words.Thesekeysproducesetresponses,whichELIZA iwillparseinto,mostlyreasonablesounding,sentences.IfELIZA  pcannotfindakeywordmatch,thenitproducesanon-committalresponseandhopesthatyouwillsaysomethingmeaningfulnexttime!   Onceyouunderstandhowthiskindofprogramworks,itiseasy  $ toexpanditandthereareanumberofELIZAprogramsaroundinPD,ofvaryingsizesanddegreesofsophistication.  fOWAFFLEisrecentoffering,fromAndrewClarke.Thisprogram  generatesvastamountsof'waffle'('flim-flam'forthebenefitofour"Americancousins)onallsortsoftopics! Writtenin'C',WAFFLEworksonasimilarprincipletoELIZA,but  *takesasitsinputatextfile,containinganumberofx$Layout 1xP #(-27