sbwiecko

#matrix map of the board is not a real matrix ;-)
#initialized to 0 <-> empty board
mat=[0, 0, 0,
     0, 0, 0,
     0, 0, 0]

#map_board to map the index of the input in the matrix map
map_board=['A1', 'B1', 'C1',
           'A2', 'B2', 'C2',
           'A3', 'B3', 'C3']