Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
All monsters your opponent controls must attack, if able. During either player's Main Phase or Battle Phase: You can send this face-up card from your Spell & Trap Zone to the GY; immediately after this effect resolves, Synchro Summon 1 Synchro Monster using materials you control, including a "Yang Zing" monster. * The above text is unofficial and describes the card's functionality in the OCG.
--竜星の極み
--Yang Zing Unleashed
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--must attack
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_MUST_ATTACK)
	e2:SetRange(LOCATION_SZONE)
	e2:SetTargetRange(0,LOCATION_MZONE)
	c:RegisterEffect(e2)
	--synchro effect
	local e4=Effect.CreateEffect(c)
	e4:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e4:SetType(EFFECT_TYPE_QUICK_O)
	e4:SetCode(EVENT_FREE_CHAIN)
	e4:SetHintTiming(0,TIMING_BATTLE_START|TIMING_BATTLE_END)
	e4:SetRange(LOCATION_SZONE)
	e4:SetCondition(s.sccon)
	e4:SetCost(s.sccost)
	e4:SetTarget(s.sctg)
	e4:SetOperation(s.scop)
	c:RegisterEffect(e4)
end
s.listed_series={SET_YANG_ZING}
function s.sccon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsMainPhase() or Duel.IsBattlePhase()
end
function s.sccost(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return c:IsAbleToGraveAsCost() and c:IsStatus(STATUS_EFFECT_ENABLED) end
	Duel.SendtoGrave(c,REASON_COST)
end
function s.mfilter(c)
	return c:IsSetCard(SET_YANG_ZING) and c:IsMonster()
end
function s.checkaddition(tp,sg,sc)
	return sg:IsExists(s.mfilter,1,nil)
end
function s.sctg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then
		Synchro.CheckAdditional=s.checkaddition
		local res=Duel.IsExistingMatchingCard(Card.IsSynchroSummonable,tp,LOCATION_EXTRA,0,1,nil)
		Synchro.CheckAdditional=nil
		return res
	end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_EXTRA)
end
function s.scop(e,tp,eg,ep,ev,re,r,rp)
	Synchro.CheckAdditional=s.checkaddition
	local g=Duel.GetMatchingGroup(Card.IsSynchroSummonable,tp,LOCATION_EXTRA,0,nil)
	if #g>0 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local sg=g:Select(tp,1,1,nil)
		Duel.SynchroSummon(tp,sg:GetFirst())
	else
		Synchro.CheckAdditional=nil
	end
end