Last Updated：2025/11/23
(game theory) Informally, a representation of a game as a tree of decision nodes, with the game beginning at a unique initial node, and flowing through the tree along a path determined by the players until a terminal node is reached, where play ends and payoffs are assigned to all players; each non-terminal node belongs to a player; that player chooses among the possible moves at that node, each possible move is an edge leading from that node to another node.
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extensive form game
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Source Word
extensive form game
Noun
(game
theory)
Informally,
a
representation
of
a
game
as
a
tree
of
decision
nodes,
with
the
game
beginning
at
a
unique
initial
node,
and
flowing
through
the
tree
along
a
path
determined
by
the
players
until
a
terminal
node
is
reached,
where
play
ends
and
payoffs
are
assigned
to
all
players;
each
non-terminal
node
belongs
to
a
player;
that
player
chooses
among
the
possible
moves
at
that
node,
each
possible
move
is
an
edge
leading
from
that
node
to
another
node.
Japanese Meaning
拡張形ゲーム：ゲーム理論において、ゲームの進行を意思決定ノードの木構造で表現する方法。 / 唯一の初期ノードから開始し、プレイヤーの選択により枝分かれした経路をたどって進行し、終端ノードに到達した時点でゲームが終了して各プレイヤーへ報酬が割り当てられる。 / 各非終端ノードはあるプレイヤーに属し、そのプレイヤーが可能な動きの中から選択し、その結果が別のノードへとつながる。
Sense（1）
(game
theory)
Informally,
a
representation
of
a
game
as
a
tree
of
decision
nodes,
with
the
game
beginning
at
a
unique
initial
node,
and
flowing
through
the
tree
along
a
path
determined
by
the
players
until
a
terminal
node
is
reached,
where
play
ends
and
payoffs
are
assigned
to
all
players;
each
non-terminal
node
belongs
to
a
player;
that
player
chooses
among
the
possible
moves
at
that
node,
each
possible
move
is
an
edge
leading
from
that
node
to
another
node.
（ plural ）
