When was Master Key last played? Has it been retired? Was the game won last time it had been played?
First, I have to admit to curiosity: why do you think Master Key has been retired?
Second, just so you know, you can see what games have been played when at the excellent TPiR stats website:
http://tpirstats.com/As you can see there, it was played approximately its usual number of times in season 47 so there's no reason to believe it's retired. It's currently on a two game losing streak; the last time it was won was on April 15 when an extremely savvy contestant who is so good looking he makes Brad Pitt jealous got both the master key and the car key. That was the first time that happened in almost 10 years.
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