YACHT
[source: Richard L. Frey, According To Hoyle]

Any number may play.Five dice are used.Each player in
rotation may cast the dice three times in each round, and
there are twelve rounds in all.

After each of his first two casts in each round a player may
pick up and cast over as many of the dice as he wishes.The
faces of the five dice showing on the table at the end of his
third cast (or at the end of a previous cast, if he chooses to
stand on what he has) must be scored in whichever of the
following categories the player chooses:

Yacht (five of a kind) scores 50.
Big Straight (2, 3, 4, 5, 6) scores 30.
Little Straight (1, 2, 3, 4, 5) scores 30.
Full House (three of one kind and two of another); Four
  of a Kind, and Choice (any five dice): each scores the
  total number of pipes showing on the five dice cast in
  that turn.
Sizes scores as many times six as there are sixes among
  the five dice; likewise with Fives, Fours, Threes, Twos
  and Aces.

In each turn a player must select a category not previously
selected; therefore at the end of the game he will have se-
lected each category once. He may select a category even
though it will make his score zero for that turn; thus, having
tried for Little Straight and missed, he may select Aces even
though his dice show 2-2-3-4-5, because the most he could
ever score for Aces would be 5 and it is the cheapest category
to forego. Having wound up with 6-6-5-4-3 when trying for
Big Straight, he may select Choice and score 24, which is
close to the maximum he could make with five dice in any
case.

A special score sheet is usually ruled off, to keep track of
the categories each player has previously selected and the
scores he has made. The maximum scores possible are:

Yacht             50       Full house   28       Fours    20
Big Straight      30       Choice       30       Threes   15
Little Straight   30       Sixes        30       Twos     10
Four of a Kind    29       Fives        25       Aces      5