In this fiendishly difficult puzzle, which may perhaps owe some inspiration to a certain BBC Radio panel game (1967-), a list is used as a set of actions to help enforce the rule that the player must keep going for ten turns without hesitation, repetition, or deviating from the subject on the card.

There is very little to this, in fact. The tricky rule to enforce is Repetition: the player is forbidden to repeat any previously tried action. We keep track of this by keeping a set of past actions, which for want of a better term is called the "tally". All we need to do is:

if the current action is listed in the tally, challenge for "Repetition of [the current action]!";
otherwise add the current action to the tally.

Note that the tally can never contain duplicates, and that when, at the end of the round, we print it out, we sort it first – this makes a more natural-looking sentence. (Sorting a list of actions uses the natural order for actions: compare the sequence on the Actions page of the Index.) The full text, then, is:

"I Didn't Come All The Way From Great Portland Street"
The Paris Theatre is a room. An instrument is a kind of thing. The violin, the tuba, the xylophone and the triangle are instruments. The violin is inside the case. The tuba, the xylophone, the radish, the case, the bust of Nicholas Parsons, the purple felt hat and the triangle are in the Paris Theatre.
The Round is a scene. The Round begins when play begins. The Round ends when the turn count is 10.
The tally is a list of stored actions that varies.
When the Round begins:
   say "'And the subject on the card is... musical instruments. Will you carry out for us something to do with that, please, for ten turns starting - now!'"
When the Round ends:
   sort the tally;
   say "Phweeep![paragraph break]'So, when the whistle goes ten turns are up, you get a point for acting when the whistle blows, and in that round you entertained us by [the tally], and you also get a bonus point for keeping going until the whistle went.'";
   end the story finally.
To challenge for (infraction - text):
   say "Bzzzzt! 'And [one of]Clement Freud[or]Derek Nimmo[or]Kenneth Williams[or]Peter Jones[at random] has challenged.'[paragraph break]'[infraction]'[paragraph break]'Well, as it's your first time playing the game, and the audience was enjoying your contribution so much, I will disallow the challenge, you have [10 minus the turn count] turn[s] left on musical instruments, starting... now!"
Before doing something:
   if the current action is listed in the tally, challenge for "Repetition of [the current action]!" instead;
   otherwise add the current action to the tally;
   if waiting, challenge for "Hesitation!" instead;
   if not looking and not waiting and the noun is not an instrument and the second noun is not an instrument, challenge for "Deviation!" instead.
Test me with "look / wait / examine bust / take tuba / get triangle / hit xylophone / get tuba / examine tuba / get violin".
Test me with "look / wait / examine bust / take tuba / get triangle / hit xylophone / get tuba / examine tuba / get violin".
Paris Theatre
You can see a tuba, a xylophone, a triangle, a case (in which is a violin), a radish, a bust of Nicholas Parsons and a purple felt hat here.

>(Testing.)

>[1] look
Bzzzzt! "And Peter Jones has challenged."

"Repetition of looking!"

"Well, as it's your first time playing the game, and the audience was enjoying your contribution so much, I will disallow the challenge, you have 9 turns left on musical instruments, starting... now!

>[2] wait
Bzzzzt! "And Clement Freud has challenged."

"Hesitation!"

"Well, as it's your first time playing the game, and the audience was enjoying your contribution so much, I will disallow the challenge, you have 8 turns left on musical instruments, starting... now!

>[3] examine bust
Bzzzzt! "And Derek Nimmo has challenged."

"Deviation!"

"Well, as it's your first time playing the game, and the audience was enjoying your contribution so much, I will disallow the challenge, you have 7 turns left on musical instruments, starting... now!

>[4] take tuba
Taken.

>[5] get triangle
Taken.

>[6] hit xylophone
Violence isn't the answer to this one.

>[7] get tuba
Bzzzzt! "And Clement Freud has challenged."

"Repetition of taking the tuba!"

"Well, as it's your first time playing the game, and the audience was enjoying your contribution so much, I will disallow the challenge, you have 3 turns left on musical instruments, starting... now!

>[8] examine tuba
You see nothing special about the tuba.

>[9] get violin
Taken.

Phweeep!

"So, when the whistle goes ten turns are up, you get a point for acting when the whistle blows, and in that round you entertained us by waiting, taking the tuba, taking the triangle, taking the violin, looking, examining the tuba, examining the bust of Nicholas Parsons and attacking the xylophone, and you also get a bonus point for keeping going until the whistle went."



*** The End ***

(The Paris Theatre in Lower Regent Street, London, was for many years the home of BBC radio panel games.)