Enact a rule, titled "Igora":
The Sensei is an office; its holder is responsible for keeping
track of the state of Igora.
Stones are a fixed asset whose recordkeepor is the Sensei. At
the beginning of each week, every active first-class player is
awarded 3 Stones. If a person ever owns more than 10 off-board
Stones, they lose off-board Stones until they have only 10.
The Board is an entity consisting of a nine-by-nine grid of
Points. The columns of Points are numbered A through J
(skipping I), and the rows are numbered 1 through 9. A Point
should be referred to using its column letter followed by its
row number.
Position is a Stone switch, tracked by the Sensei, whose
possible values are off-board (default) and every Point. It is
IMPOSSIBLE for two Stones to occupy the same Point. The Sensei
SHALL report Stone Positions by publishing a diagram of the
Board.
Stones with the same owner and Position are fungible.
A person CAN, by announcement, play any Stone that e owns on any
unoccupied Point.
A chain is a connected set of Stones, all owned by the same
Alliance, such that there is no Stone owned by that Alliance
that is adjacent to the set but not in the set. A chain is in
jeopardy if there are no unoccupied Points adjacent to it. If a
person owns a Stone that is part of a chain that is in jeopardy,
then e CANNOT Play a Stone, the above notwithstanding. If a
chain is in jeopardy, then any person who owns a Stone in it CAN
capture the chain by announcement. If a chain has been in
jeopardy continuously for three days, anyone CAN capture it by
announcement. When a chain is captured, all Stones in it are
destroyed.
An alliance is a set of persons. Each person is in exactly one
alliance. By default, each person is in an alliance that
contains no other persons. A person CAN join an alliance With
the Support of all its existing members; this causes em to cease
to be a member of eir previous alliance. A person CAN leave eir
alliance by announcement; this causes em to become a member of a
new alliance containing no other persons. If an alliance is
ever empty, it ceases to exist. The Sensei's report includes
all alliances that have more than one member.
If a player has at least seven Stones on the board, and no other
player has at least seven Stones on the board, then that player
satisfies the Victory Condition of Shori, and all Stones are
destroyed. When this happens, the Sensei SHOULD announce who
the winner was.
—Machiavelli
