帮会灯谜：谜面竞猜的三次机会

local RIDDLES = {
    {q = "一口咬掉牛尾巴", a = "告"},
    {q = "十五天", a = "胖"},
    {q = "半真半假", a = "值"},
}
local function answer(actor, idx, guess)
    local r = RIDDLES[idx]
    if r == nil then return end
    local key = "riddle" .. idx
    local tries = getplayvar(actor, key) or 0
    if tries >= 3 then
        sendmsg(actor, 1, "该题机会已用完")
        return
    end
    setplayvar(actor, key, tries + 1)
    if guess == r.a then
        giveitem(actor, 7601 + idx, 1)
        sendmsg(actor, 1, "答对，奖励已发")
    else
        sendmsg(actor, 1, "不对，还剩 "
            .. 3 - tries - 1 .. " 次机会")
    end
end

local function pushRiddle(actor, idx)
    local r = RIDDLES[idx]
    sendmsg(actor, 1, "谜面 " .. idx .. "：" .. r.q)
end