in pachi_py/cypachi.pyx [0:0]
def __hash__(self):
# Not sure if this is the best hash implementation, but it seems to work
cdef long h = 0
cdef int i, j
for i in range(self._size):
for j in range(self._size):
h = 101*h + board_atij(self._b.pachiboard(), i, j)
return h