print ("Welcome to Checkers!", "\n")
#Display the board
board= [ [" - " , " x " , " - " , " x " , " - " , " x ", " - ", " x " ,  8 ] ,
      [" x " , " - " , " x " , " - " , " x ", " - " , " x " , " - " , 7 ],
      [" - " , " x " , " - " , " x " , " - " , " x ", " - ", " x " ,  6 ],
      [" - " , " - " , " - " , " - " , " - " , " - ", " - ", " - " ,  5 ],
      [" - " , " - " , " - " , " - " , " - " , " - ", " - ", " - " ,  4 ],
      [" o " , " - " , " o " , " - " , " o " , " - ", " o ", " - " ,  3 ],
      [" - " , " o " , " - " , " o " , " - " , " o ", " - ", " o " ,  2 ],
      [" o " , " - " , " o " , " - " , " o " , " - ", " o ", " - " ,  1 ],
      [" A " , " B " , " C " , " D " , " E " , " F ", " G ", " H "] ]
for i in range (len(board)) :
    for j in range (len(board[i])) :
        print (board[i][j], end = " ")
    print ()
#Assign values for movements
letter = {"A":0, "B":1 , "C":2 , "D":3 , "E":4 , "F":5 , "G":6, "H":7}
number = {"8":0, "7":1, "6":2, "5":3, "4":4, "3":5, "2":6, "1":7}
a = move[0]
b = move[1]
c = move[3]
d = move[4]
e = move[6]
f = move[7]
g = move[9]
h = move[10]
x1 = number[b]
x1 = int(x1)
y1 = letter[a]
y1 = int(y1)
x2 = number[d]
x2 = int(x2)
y2 = letter[c]
y2 = int(y2)
x3 = number[f]
x3 = int(x3)
y3 = letter[e]
y3 = int(y3)
x4 = number[h]
x4 = int(x4)
y4 = letter[g]
y4 = int(y4)
def movement(board,x1,y1,x2,y2):
    board[x1][y1],board[x2][y2]=board[x2][y2],board[x1][y1]
    return board
def darkcapture(board,x1,y1,x2,y2,x3,y3):
    board[x1][y1] = " - "
    board[x2][y2] = " - "
    board[x3][y3] = " x "
def lightcapture(board,x1,y1,x2,y2,x3,y3):
    board[x1][y1] = " - "
    board[x2][y2] = " - "
    board[x3][y3] = " o "
def darkmove(board,x1,y1,x2,y2):
    global move
    move = input("Dark pieces to play. Enter your move:")
    movement(board,x1,y1,x2,y2)
    for i in range (len(board)) :
        for j in range (len(board[i])) :
            print (board[i][j], end = " ")
        print ()
    print ("\n","Dark player played:", move)
def lightmove(board,x1,y1,x2,y2):
    global move
    move = input("Light pieces to play. Enter your move:") #PLayer 1 is the always the first one to move
    movement(board,x1,y1,x2,y2)
    for i in range (len(board)) :
        for j in range (len(board[i])) :
            print (board[i][j], end = " ")
        print ()
    print ("\n","Light player played:", move)
turn = 1
while turn>=1:
    if turn%2==0:
            darkmove(board,x1,y1,x2,y2)
    else:
            lightmove(board,x1,y1,x2,y2)
    turn +=1