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```# Chess Game

board = ["r", "n", "b", "q", "k", "b", "n", "r", "x", "x", "x", "x", "x", "x", "x", "x", " ", " ",
" ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ",
" ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", "X", "X", "X", "X", "X", "X",
"X", "X", "R", "N", "B", "Q", "K", "B", "N", "R"]

# Black and White squares will be useful when checking bishop moves
blackSquares = [0,2,4,6,9,11,13,15,16,18,20,22,25,27,29,31,32,34,36,38,41,43,45,47,48,50,
52,54,57,59,61,63]
whiteSquares = [1,3,5,7,8,10,12,14,17,19,21,23,24,26,28,30,33,35,37,39,40,42,44,46,49,51,
53,55,56,58,60,62]
# 0 for white and 1 for black
player = 0
destination = 0
origin = 0
movingPiece = ""

def introScreen():
print("Hello, welcome to the Chess Notation Viewer")
print("This allows you to view every stage of a notated chess")
print("match as it would appear on the board.")
input()
print("The lower  case letters represent White pieces and the")
print("upper case letters represent Black pieces.")
input()
print("Enter the notations and the board will show the moves.")
print("Here is the original position.")

# translates a letter-number coordinate such as e4 to a position on the board, eg 28
def coordinate(letter, number,notation):
location = (ord(notation[letter]) - 97) + 8 * (int(notation[number]) - 1)
return location

def calculateInput():
notation = input()
origin = 0
if player == 0:
# This is for moves made by pawns
if notation[0].islower() == True:
if notation[1] == "x":
destination = coordinate(2,3,notation)
origin = coordinate(0,3,notation) - 8
else:
destination = coordinate(0,1,notation)
if board[destination - 8] == "x":
origin = destination - 8
if board[destination - 16] == "x":
origin = destination - 16
movingPiece = "x"

# This is for moves made by bishops
if notation[0] == "B":
if notation[1] == "x":
destination = coordinate(2,3,notation)
else:
destination = coordinate(1,2,notation)
if destination in whiteSquares:
for i in range(31):
if board[whiteSquares[i]] =="b":
origin = whiteSquares[i]
else:
for i in range(31):
if board[blackSquares[i]] =="b":
origin = blackSquares[i]
movingPiece = "b"

# This is for moves made by Queens
if notation[0] == "Q":
if notation[1] == "x":
destination = coordinate(2,3,notation)
else:
destination = coordinate(1,2,notation)
for i in range(63):
if board[1] == "q":
origin = i
movingPiece = "q"

# This is for moves made by kings
if notation[0] == "K":
if notation[1] == "x":
destination = coordinate(2,3,notation)
else:
destination = coordinate(1,2,notation)
for i in range(63):
if board[1] == "k":
origin = i
movingPiece = "k"

if notation[0] == "N":
knightMoves = [15,17,6,10,-10,-6,-17,-15]
destination = coordinate(len(notation)-2, len(notation) - 1,notation)
if len(notation) > 3 and notation[1] != "x":
if notation[1].isalpha() == True:
for i in range(7):
if board[(ord(notation[1]) - 97)+8*i] == "n":
origin = (ord(notation[1]) - 97)+8*i
else:
for i in range(7):
if board[8*(int(notation[1])-1)+i] == "n":
origin = 8*(int(notation[1])-1)+i
else:
if destination <= 15:
if knightMoves.count(-17) == 1:
knightMoves.remove(-17)
if knightMoves.count(-15) == 1:
knightMoves.remove(-15)
if destination <= 7:
if knightMoves.count(-10) == 1:
knightMoves.remove(-10)
if knightMoves.count(-6) == 1:
knightMoves.remove(-6)
if destination >= 48:
if knightMoves.count(15) == 1:
knightMoves.remove(15)
if knightMoves.count(17) == 1:
knightMoves.remove(17)
if destination >= 56:
if knightMoves.count(6) == 1:
knightMoves.remove(6)
if knightMoves.count(10) == 1:
knightMoves.remove(10)
if destination % 8 == 0 or destination % 8 == 1:
if knightMoves.count(6) == 1:
knightMoves.remove(6)
if knightMoves.count(-10) == 1:
knightMoves.remove(-10)
if destination % 8 == 0:
if knightMoves.count(15) == 1:
knightMoves.remove(15)
if knightMoves.count(-17) == 1:
knightMoves.remove(-17)
if destination % 8 == 6 or destination % 8 == 7:
if knightMoves.count(10) == 1:
knightMoves.remove(10)
if knightMoves.count(-6) == 1:
knightMoves.remove(-6)
if destination % 8 == 7:
if knightMoves.count(17) == 1:
knightMoves.remove(17)
if knightMoves.count(-15) == 1:
knightMoves.remove(-15)
for i in range(len(knightMoves)):
if board[destination + knightMoves[i]] == "n":
origin = destination + knightMoves[i]
movingPiece = "n"

if notation[0] == "R":
destination = coordinate(len(notation)-2, len(notation) - 1,notation)
if len(notation) > 3 and notation[1] != "x":
if notation[1].isalpha() == True:
for i in range(7):
if board[(ord(notation[1]) - 97)+8*i] == "r":
origin = (ord(notation[1]) - 97)+8*i
else:
for i in range(7):
if board[8*(int(notation[1])-1)+i] == "r":
origin = 8*(int(notation[1])-1)+i
else:
for i in range(int(((destination % 8 + 56) - destination)/8 - 1)):
if board[destination + 8 * (i+1)] == "r":
origin = destination + 8 * (i+1)
break
elif board[destination + 8 * (i+1)] == " ":
pass
else:
break
for i in range(int((destination - (destination % 8))/8 - 1)):
if board[destination - 8 * (i+1)] == "r":
origin = destination - 8 * (i+1)
break
elif board[destination + 8 * (i+1)] == " ":
pass
else:
break
for i in range(int(destination % 8 - 1)):
if board[destination - (i+1)] == "r":
origin = destination -(i+1)
break
elif board[destination - (i+1)] == " ":
pass
else:
break
for i in range(int(6 - destination % 8)):
if board[destination + (i+1)] == "r":
origin = destination + (i+1)
break
elif board[destination + (i+1)] == " ":
pass
else:
break
movingPiece = "r"

if player == 1:
# This is for moves made by pawns
if notation[0].islower() == True:
if notation[1] == "x":
destination = coordinate(2,3,notation)
origin = coordinate(0,3,notation) + 8
else:
destination = coordinate(0,1,notation)
if board[destination + 8] == "X":
origin = destination + 8
if board[destination + 16] == "X":
origin = destination + 16
movingPiece = "X"

# This is for moves made by bishops
if notation[0] == "B":
if notation[1] == "x":
destination = coordinate(2,3,notation)
else:
destination = coordinate(1,2,notation)
if destination in whiteSquares:
for i in range(31):
if board[whiteSquares[i]] =="B":
origin = whiteSquares[i]
else:
for i in range(31):
if board[blackSquares[i]] =="B":
origin = blackSquares[i]
movingPiece = "B"

# This is for moves made by Queens
if notation[0] == "Q":
if notation[1] == "x":
destination = coordinate(2,3,notation)
else:
destination = coordinate(1,2,notation)
for i in range(63):
if board[i] == "Q":
origin = i
movingPiece = "Q"

# This is for moves made by kings
if notation[0] == "K":
if notation[1] == "x":
destination = coordinate(2,3,notation)
else:
destination = coordinate(1,2,notation)
for i in range(63):
if board[i] == "K":
origin = i
movingPiece = "K"

if notation[0] == "N":
knightMoves = [15,17,6,10,-10,-6,-17,-15]
destination = coordinate(len(notation)-2, len(notation) - 1,notation)
if len(notation) > 3 and notation[1] != "x":
if notation[1].isalpha() == True:
for i in range(7):
if board[(ord(notation[1]) - 97)+8*i] == "N":
origin = (ord(notation[1]) - 97)+8*i
else:
for i in range(7):
if board[8*(int(notation[1])-1)+i] == "N":
origin = 8*(int(notation[1])-1)+i
else:
if destination <= 15:
if knightMoves.count(-17) == 1:
knightMoves.remove(-17)
if knightMoves.count(-15) == 1:
knightMoves.remove(-15)
if destination <= 7:
if knightMoves.count(-10) == 1:
knightMoves.remove(-10)
if knightMoves.count(-6) == 1:
knightMoves.remove(-6)
if destination >= 48:
if knightMoves.count(15) == 1:
knightMoves.remove(15)
if knightMoves.count(17) == 1:
knightMoves.remove(17)
if destination >= 56:
if knightMoves.count(6) == 1:
knightMoves.remove(6)
if knightMoves.count(10) == 1:
knightMoves.remove(10)
if destination % 8 == 0 or destination % 8 == 1:
if knightMoves.count(6) == 1:
knightMoves.remove(6)
if knightMoves.count(-10) == 1:
knightMoves.remove(-10)
if destination % 8 == 0:
if knightMoves.count(15) == 1:
knightMoves.remove(15)
if knightMoves.count(-17) == 1:
knightMoves.remove(-17)
if destination % 8 == 6 or destination % 8 == 7:
if knightMoves.count(10) == 1:
knightMoves.remove(10)
if knightMoves.count(-6) == 1:
knightMoves.remove(-6)
if destination % 8 == 7:
if knightMoves.count(17) == 1:
knightMoves.remove(17)
if knightMoves.count(-15) == 1:
knightMoves.remove(-15)
for i in range(len(knightMoves) - 1):
if board[destination + knightMoves[i]] == "N":
origin = destination + knightMoves[i]
movingPiece = "N"

if notation[0] == "R":
destination = coordinate(len(notation)-2, len(notation) - 1,notation)
if len(notation) > 3 and notation[1] != "x":
if notation[1].isalpha() == True:
for i in range(7):
if board[(ord(notation[1]) - 97)+8*i] == "R":
origin = (ord(notation[1]) - 97)+8*i
else:
for i in range(7):
if board[8*(int(notation[1])-1)+i] == "R":
origin = 8*(int(notation[1])-1)+i
else:
for i in range(int(((destination % 8 + 56) - destination)/8 - 1)):
if board[destination + 8 * (i+1)] == "R":
origin = destination + 8 * (i+1)
break
elif board[destination + 8 * (i+1)] == " ":
pass
else:
break
for i in range(int((destination - (destination % 8))/8 - 1)):
if board[destination - 8 * (i+1)] == "R":
origin = destination - 8 * (i+1)
break
elif board[destination + 8 * (i+1)] == " ":
pass
else:
break
for i in range(int(destination % 8 - 1)):
if board[destination - (i+1)] == "R":
origin = destination -(i+1)
break
elif board[destination - (i+1)] == " ":
pass
else:
break
for i in range(int(6 - destination % 8)):
if board[destination + (i+1)] == "R":
origin = destination + (i+1)
break
elif board[destination + (i+1)] == " ":
pass
else:
break
movingPiece = "R"

if notation == "0-0" or notation == "O-O":
if player == 0:
board[6] = "k"
board[5] = "r"
board[7] = " "
board[4] = " "
if player == 1:
board[62] = "K"
board[61] = "R"
board[63] = " "
board[60] = " "
elif notation == "0-0-0" or notation == "O-O-O":
if player == 0:
board[2] = "k"
board[3] = "r"
board[0] = " "
board[4] = " "
if player == 1:
board[58] = "K"
board[59] = "R"
board[56] = " "
board[60] = " "

else:
board[destination] = movingPiece
board[origin] = " "

def showScreen():
print(" ---------------------------------")
print(" |   |   |   |   |   |   |   |   |")
print("8| " + board[56] + " | " + board[57] + " | " + board[58] + " | " + board[59] +
" | " + board[60] + " | " + board[61] + " | " + board[62] + " | " + board[63] + " |")
print(" |   |   |   |   |   |   |   |   |")
print(" ---------------------------------")
print(" |   |   |   |   |   |   |   |   |")
print("7| " + board[48] + " | " + board[49] + " | " + board[50] + " | " + board[51] +
" | " + board[52] + " | " + board[53] + " | " + board[54] + " | " + board[55] + " |")
print(" |   |   |   |   |   |   |   |   |")
print(" ---------------------------------")
print(" |   |   |   |   |   |   |   |   |")
print("6| " + board[40] + " | " + board[41] + " | " + board[42] + " | " + board[43] +
" | " + board[44] + " | " + board[45] + " | " + board[46] + " | " + board[47] + " |")
print(" |   |   |   |   |   |   |   |   |")
print(" ---------------------------------")
print(" |   |   |   |   |   |   |   |   |")
print("5| " + board[32] + " | " + board[33] + " | " + board[34] + " | " + board[35] +
" | " + board[36] + " | " + board[37] + " | " + board[38] + " | " + board[39] + " |")
print(" |   |   |   |   |   |   |   |   |")
print(" ---------------------------------")
print(" |   |   |   |   |   |   |   |   |")
print("4| " + board[24] + " | " + board[25] + " | " + board[26] + " | " + board[27] +
" | " + board[28] + " | " + board[29] + " | " + board[30] + " | " + board[31] + " |")
print(" |   |   |   |   |   |   |   |   |")
print(" ---------------------------------")
print(" |   |   |   |   |   |   |   |   |")
print("3| " + board[16] + " | " + board[17] + " | " + board[18] + " | " + board[19] +
" | " + board[20] + " | " + board[21] + " | " + board[22] + " | " + board[23] + " |")
print(" |   |   |   |   |   |   |   |   |")
print(" ---------------------------------")
print(" |   |   |   |   |   |   |   |   |")
print("2| " + board[8] + " | " + board[9] + " | " + board[10] + " | " + board[11] +
" | " + board[12] + " | " + board[13] + " | " + board[14] + " | " + board[15] + " |")
print(" |   |   |   |   |   |   |   |   |")
print(" ---------------------------------")
print(" |   |   |   |   |   |   |   |   |")
print("1| " + board[0] + " | " + board[1] + " | " + board[2] + " | " + board[3] +
" | " + board[4] + " | " + board[5] + " | " + board[6] + " | " + board[7] + " |")
print(" |   |   |   |   |   |   |   |   |")
print(" ---------------------------------")
print("   a   b   c   d   e   f   g   h  ")

introScreen()
showScreen()
while 1 == 1:
calculateInput()
player = (player + 1) % 2
showScreen()
```