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CXQChineseChessBasicRules Onecanmovethepiecesaccordingtothefollowingrules: TheKingmovesonlyonespaceatatime,eitherhorizontallyorvertically.Furthermore,theKingmustalwaysstaywithinthepalace,whichisasquaremarkedwithanX. TheGuards(Advisor)moveonlyonespaceatatimediagonally.SimilartotheKing,theguardsmuststaywithinthepalace. TheMinisters(Elephants)movetwospacesatatimediagonally(i.e.2spacesleft/rightand2spacesup/downinamove).Theymuststaywithintheirownsideoftheriver.Ifthereisapiecemidwaybetweentheoriginalandfinalintendedpositionofaminister,theministerisblockedandthemoveisnotallowed. TheRooks(Cars)moveoneormorespaceshorizontallyorverticallyprovidedthatallpositionsbetweentheoriginalandfinalpositionsareempty. TheKnights(Horses)movetwospaceshorizontallyandonespacevertically(orrespectively2spacesverticallyandonespacehorizontally).Ifthereisapiecenexttothehorseinthehorizontal(vertical)direction,thehorseisblockedandthemoveisnotallowed. TheCannonsmoveoneormorespaceshorizontallyorverticallylikeaRook.However,inacapturemove,theremustbeexactlyonenon-emptyspaceinbetweentheoriginalandfinalposition.Inanon-capturemove,allspacesinbetweenmustbeempty. ThePawns(orSoldiers)moveonespaceatatime.Ifapawndoesnotcrosstheriveryet,itcanonlymoveforwardvertically.Oncecrossingtheriver,thepawncanalsomovehorizontally. Capture:Whenapiecemovestoapositioncurrentlyheldbyanopponent'spiece,itcapturesthatopponent'spiece.Thecapturedpieceisremovedfromtheboard. King'slineofsight:ThetwoKingsintheboardmustneverbeonthesamefile(verticalline)withoutanypiecesinbetweenthem.AmovethatputsthetwoKingsinsuchasettingisillegal. Kingsafety:OnemustneverleavetheKingtobecapturedbytheopponentinthenextmove.AnymovesthatputtheKinginsuchasettingisillegal. Endgamecondition:Thegameendswhenoneofthefollowingsituationshappens: Checkmate:Ifonethreatenstocapturetheopponent'sKingandtheopponenthasnowaytoresolvethethreat,onewins. Stalemate:Ifonedoesnothaveanyvalidmove,oneloses. OneorbothsidesviolatetheAdvancedRules. CXQChineseChessAdvancedRules Tomakethegamesfair,certainpaternofmovementsarerestricted.Inthenutshell,CXQRulesprohibitaplayertocontinuouslythreatentocaptureoneopponent'spieceusingoneormorepieces.Suchmovementsareeitherperpetualchecks(iftheKingisthreatened)orperpetualchases(ifanunprotectedpieceotherthantheKingisthreatened). Terminology:Tomaketherulesprecise,thefollowingtermsareused: Check:Amoveofanypiecethatcausestheopponent'sKingtobethreatenedwithcaptureinthenextmove. Sametypesacrifice/trade:Apiecemovestoapositionwhereitcancaptureanopponent'spieceofthesametypeinsuchawaythattheopponentpiececanalsocaptureitinthenextmove. Chase:Apiecemovestoapositionwhereitcancaptureanopponent'spiece,whichisnottheKing,inthenextmove.Itisalsoachasewhenapiecemovesandresultsinacannonattackinganopponent'spiece.Thereareafewexceptions: ItisnotachasewhenaKingoraPawnthreatenstocaptureanypiece. ItisnotachasetothreatentocaptureaPawnwhenitisyettocrosstheriver. Sametypesacrifice/tradeisnotachase. Protected:Apieceisprotectedifthereisapiecethatcancaptureanypiecethattakestheprotectedpiece.Anexceptionisthatacarisneverconsideredprotectedwhenitisthreatenedbyanopponent'scannonorknight. TheCXQAdvancedRules:Allmovesfollowingthebasicrulesareallowedexcept: PerpetualCheck:Continuouslycheckingopponentusingoneormorepiecesisnotallowed. PerpetualChase:Continuouslychasingoneunprotectedopponentpieceusingoneormorepiecesisnotallowed. WhenonesideviolatestheAdvancedRuleswhiletheotherdoesnot,theonewhoviolatestheruleloses.Itisadrawwhenbothsidesperpetualcheckorbothperpetualchase.Ifonesideperpetualchecksandtheothersideperpetualchases,theonewhoperpetualchecksloses. CXQallowsaplayertocheck/chase6consecutivetimesusingonepiece,12timesusing2pieces,and18timesusing3piecesbeforeconsideringthecheck/chaseaperpetualcheck/chase. CXQAutomaticDrawingRules Whenthegameisnotwinnable,itisstronglyrecommendedthatbothplayersdrawthegamebythemselves.Topreventoneorbothplayersfromdraggingthegamesforalongtime,CXQimposesthefollowing3rulesforautomaticdrawing: MovesRule:Whenthetotalnumberofmovesmadebyeachsidereaches300. EffectiveRule:Whenthetotalnumberofeffectivemoves,movesmadebyeachsideexcludingchecking/chasingmovesormovestorespondtochecking/chasing,reaches120. ProgressRule:Whenthetotalnumberofmovesbyeachsidesincethelasttimeaprogressismade,i.e.since(1)thelastcaptureor(2)thelastadvanceofapawnalreadycrossedtheriver,reaches30. Notes CXQAdvancedRulesaresimilartoAsianChineseChessRules.CXQ'sgoalistomaketherulesaseasilyunderstandablebyanaverageplayeraspossible.ThosewhowishtolearntherulesmoreindetailarestronglyrecommendedtocheckoutAsianRules. FollowingarethejudgementcallsforcommonscenariosusingtheAdvancedRules: One(ormany)checksoneidleisallowed. One(ormany)checksonechaseisallowed. One(ormany)chasesonecheckisallowed. One(ormany)chasesoneidleisallowed. One(ormany)checksonethreatentocheckmateisallowed. Perpetualchasetwoormorepiecesisallowed. Perpetualblockingisallowed. NotethatamoveisaviolationifitviolatestheAdvancedRulesinanyway.Forexample,aperpetualblocking,ifitisalsoaperpetualchase,isaviolationeventhoughperpetualblockingisallowedingeneral. http://www./xiangqi.html |
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