WEITUWEIQI (a game sample)

Oshiqi mechanics with both players playing "x"s. Chicken start.
Moves are mandatory, and if the game ends by stalemate then
the winner is determined by whether the boundary has been reached.
Any boundary hit is a win for an ESCAPER, otherwise BLOCKER wins.

Unlur or "chicken" starting:-  both sides play moves as ESCAPERS.
If at any time a player feels a blocker is now certain to win,
he announces "I Block!", but does not make a move. The other player
remains the sole escaper and plays the first move in regular alternation.

Note: If, still on the first phase, a player makes a stalemate position
he loses, (opponent chooses "block" and stalemater cannot continue).

Game sample
                             B    J
abcdefghijklmnopqrstu       ----------
     . . . x . .        1.  i6    s6
    . . . x . . .       2.  j5e   q6
   . . . . . x x .      3.  j7n   l1
  . x . . . . . . .     4.  p3    k2
 . . . x x . . . . .    5.  q8    o8
. . . . x . . . x x .   6.  n3!  block
 . . . O x . . . . .    7.  h5se  p11
  . . . : . . x x .     8.  p9    g10
   . . . X . . x .      9.  l11   e4
    . x . . . . .      10.  j9    l9 (forced)
     . . . x . x       11.  i2   1-0
abcdefghijklmnopqrstu