Seki means to possess or to occupy. If two opposing
chains that have no closed eyes are so situated with respect to each
other that only two free places remain, then Seki arises, that is,
the opponent's stones cannot be taken because the one who first occupies
one of the free points can be taken by the other. Among skilled players
Seki seldom or never occurs.
as Upperhand: a play to which the opponent must either answer or else
suffer a severe lost.
players try to strengthen their own Ji
but it's still unstable, this state called Shuban.
So they have to stabilize it until a whole fortress is created, and
this is called Yose. At last when the
Ji is stable and the fortress boundaries is set, the game
is over, and it is called Shukyoku.
Shichou refers to ladder tactics whereby an opponent's stones are
check alternately right and left and forced into a diagonal flight
leading to the edge of the board and final capture. If the ladder
leads to a previous placed opponent's stone, this tactic will not
work and in fact will turn against the attackers.
It's a stone to be sacrificed. There are sometime we need to sacrifice
our stones in order to narrow the opponent position and enlarge our
Watari refers to tactics whereby two nearby emplacements are connected
by a play between them.