Here’s a link to the Wiki site with rules: Botticelli (game) - Wikipedia
We have a few idiosyncracies, of course.
Basically, the game goes like this:
The Host, who won the previous round, picks a person, real or fictional, and provides an initial letter from the name. (Isaac Asimov could be I or A. John Quincy Adams could be J, Q or A. Socrates is just going to be an S. Queen Elizabeth II, however, is an E. Titles don’t count UNLESS they’re part of the name. Queen Latifah could be a Q or an L.)
Players then ask Indirect Questions (IQs). An IQ has to reference someone who has the same initial as the Host is asking for. (If the letter is A, then you could ask “Were you the second POTUS’s wife?” for Abigail Adams.) All IQs (and DQs) have to come from your own noggin, however. There is no researching for answers. This goes for the Host as well, but he or she is allowed to research the person he’s hosting in order to answer questions. But ONLY that person.
Every asked IQ that the Host cannot answer earns the player a DQ, which is a 20 Questions-like question that can be answered yes or no. (The first DQ is usually, and needs to be, “Real?” because otherwise it can be a real stretch answering some questions if the person is fictional.)
It is our practice to allow 3 IQs to be asked per round. There’s no limit to the number of DQs one can store up to ask later, but see below.
When 20 DQs have been asked and answered, the Host declares an end to the IQs. He or she may also call an end to DQs if he or she likes, but it’s more often the case that he or she lets any outstanding DQs be asked. There will be a time limit.
Then, when the DQs are cut off, everyone who has earned one DQ or more during the game gets to ask one “Are you Firstname Lastname?” question. Whoever gets it right gets to host the next round. If no one gets it right, then the Host gets to go again.
Except that: in order to prevent people coming up with truly obscure persons, it is our practice that at least one of the other players must have heard of this person. If no one has, then the Hosting duties fall back to whoever Hosted the game before the present Host.
There are a few other peculiarities we use:
“American” in a DQ refers to the United States of America. It doesn’t refer to Canada, Mexico, Central or South America, which would have to be asked separately.
“The Arts” come in three flavors: performing, visual and writing. Plays are not considered prose writing.
Other players may add to this, and I may have forgotten something, but that’s basically it.