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chess_logic.py
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chess_logic.py
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import sys
import serial
def isLegal(row1, col1, row2, col2):
#(row1,col1) where piece is starting
#(row2,col2) where piece is going
piece = board[row1][col1]
drow = row2 - row1
dcol = col2 - col1
#there's nothing there!
if piece==None:
return False
#starting with the wrong color
if (isWTurn == True) and (piece[0] == 'b'): return False
if (isWTurn == False) and (piece[0] == 'w'): return False
if board[row2][col2] != None: #check that it isn't taking own piece
if (isWTurn == True) and (board[row2][col2][0] == 'w'): return False
elif (isWTurn == False) and (board[row2][col2][0] == 'b'): return False
if "Pawn" in piece: return isPawnLegal(row1,col1,row2,col2,drow,dcol)
elif "Knight" in piece: return isKnightLegal(drow,dcol)
elif "Bishop" in piece: return isBishopLegal(row1,col1,drow,dcol)
elif "Rook" in piece: return isRookLegal(row1,col1,drow,dcol)
elif "Queen" in piece: return isQueenLegal(row1,col1,drow,dcol)
elif "King" in piece: return isKingLegal(drow,dcol,row2,col2)
def isPawnLegal(row1, col1, row2, col2, drow, dcol):
#have to en passant in the next turn
if isWTurn:
#moves 2 if it is on first move
if (row1 == 6) and (board[row2][col2] == None) and (drow == -2 and dcol == 0\
and board[row1 - 1][col1] == None):
return True
#single move
elif (board[row2][col2] == None) and (drow == -1) and (dcol == 0):
return True
#captures piece
elif (board[row2][col2] != None) and (drow == -1) and (abs(dcol) == 1):
return True
else:
if (row1 == 1) and (board[row2][col2] == None) and (drow == 2) and (dcol == 0)\
and (board[row1 + 1][col2] == None):
return True
elif (board[row2][col2] == None) and (drow == 1) and (dcol == 0):
return True
elif (board[row2][col2] != None) and (drow == 1) and (abs(dcol) == 1):
return True
return False
def isKnightLegal(drow, dcol):
if (abs(drow) == 2 and abs(dcol) == 1) or (abs(drow) == 1 and abs(dcol) == 2):
return True
else: return False
def isBishopLegal(row1, col1, drow, dcol):
if abs(drow) != abs(dcol): return False
elif abs(drow)>1:
#need to make sure nothing in the middle
if drow>0 and dcol>0: #midrow and midcol are equal
for midrow in xrange(1,drow):
if board[row1+midrow][col1+midrow]!=None:
return False
if drow>0 and dcol<0:
for midrow in xrange(1,drow):
for midcol in xrange(dcol+1,0):
if midrow==abs(midcol):
if board[row1+midrow][col1+midcol]!=None:
return False
if drow<0 and dcol>0:
for midrow in xrange(drow+1,0):
for midcol in xrange(1,dcol):
if abs(midrow)==midcol:
if board[row1+midrow][col1+midcol]!=None:
return False
if drow<0 and dcol<0:
for midrow in xrange(drow+1,0): #midrow and midcol are equal
if board[row1+midrow][col1+midrow]!=None:
return False
return True
def isRookLegal(row1, col1, drow, dcol):
if drow==0 or dcol==0:
if drow==0 and abs(dcol)>1:
if dcol<0:
for midcol in xrange(dcol+1,0):
if board[row1][col1+midcol]!=None:
return False
else:
for midcol in xrange(1,dcol):
if board[row1][col1+midcol]!=None:
return False
elif dcol==0 and abs(drow)>1:
if drow<0:
for midrow in xrange(drow+1,0):
if board[row1+midrow][col1]!=None:
return False
else:
for midrow in xrange(1,drow):
if board[row1+midrow][col1]!=None:
return False
return True
return False
def isQueenLegal(row1, col1, drow, dcol):
#queen basically combines rook and bishop
if isRookLegal(row1,col1,drow,dcol): return True
elif isBishopLegal(row1,col1,drow,dcol): return True
else: return False
def isKingLegal(drow, dcol, row2, col2):
if abs(drow)>1 or abs(dcol)>1:
return False
if check(row2,col2)==True:
return False
else: return True
def check(row2, col2):
for row in xrange(rows):
for col in xrange(cols):
#checks legal moves for all of the pieces
if board[row][col]!=None:
if "King" not in board[row][col]:
#checking for black pieces
if isWTurn and board[row][col][0]!='w':
checkForLegalMovesB(row,col)
legalMoves=copy.deepcopy(legalMovesB)
if (row2,col2) in legalMoves:
return True
elif isWTurn==False and board[row][col][0]!='b':
checkForLegalMovesB(row,col)
legalMoves=copy.deepcopy(legalMovesB)
if (row2,col2) in legalMoves:
return True
#if a pawn is in a position to capture the king
if isWTurn:
if row2>0:
if col2>0 and board[row2-1][col2-1]!=None:
if "bPawn" in board[row2-1][col2-1]:
return True
if col2<7 and board[row2-1][col2+1]!=None:
if "bPawn" in board[row2-1][col2+1]:
return True
else:
if row2<7:
if col2>0 and board[row2+1][col2-1]!=None:
if "wPawn" in board[row2+1][col2-1]:
return True
if col2<7 and board[row2+1][col2+1]!=None:
if "wPawn" in board[row2+1][col2+1]:
return True
return False
def checkForEndGame():
#checks if king has been captured
wKing=bKing=False
for row in xrange(rows):
for col in xrange(cols):
if board[row][col]=='wKing':
wKing=True
if board[row][col]=='bKing':
bKing=True
if wKing==False:
isGameOver=True
winner='black'
return
elif bKing==False:
isGameOver=True
winner='white'
return
def performMove(row1, col1, row2, col2):
#moves piece to target
board[row2][col2] = board[row1][col1]
board[row1][col1] = None #empties source
#change players
global isWTurn
isWTurn = not isWTurn
def wordToCol(word):
if word == "AZKABAN":
return 0
elif word == "BUTTERBEER":
return 1
elif word == "CENTAUR":
return 2
elif word == "DEMENTOR":
return 3
elif word == "EXPELLIARMUS":
return 4
elif word == "FIREBOLT":
return 5
elif word == "GRYFFINDOR":
return 6
elif word == "HOGWARTS":
return 7
else:
return -1
# Initialize chess software
board = [['bRook1','bKnight1','bBishop1','bQueen1',
'bKing','bBishop2','bKnight2','bRook2',],
['bPawn1','bPawn2','bPawn3','bPawn4',
'bPawn5','bPawn6','bPawn7','bPawn8'],
[None,None,None,None,None,None,None,None],
[None,None,None,None,None,None,None,None],
[None,None,None,None,None,None,None,None],
[None,None,None,None,None,None,None,None],
['wPawn1','wPawn2','wPawn3','wPawn4',
'wPawn5','wPawn6','wPawn7','wPawn8'],
['wRook1','wKnight1','wBishop1','wQueen1',
'wKing','wBishop2','wKnight2','wRook2']]
#board = [['bRook1', None, None, None, 'bKing', None, 'bKnight2', None],
# [None,None,None,'bPawn4',None,None,None,None],
# [None,None,None,None,None,None,None,None],
# [None,None,None,None,None,None,None,None],
# [None,None,None,None,None,None,None,None],
# [None,None,None,None,None,None,None,None],
# ['wPawn1',None,None,None,None,None,None,None],
# [None, None, 'wBishop1', 'wQueen1', 'wKing', None, None, None]]
isGameOver=False
isWTurn=True
isBlackChecked=False
isWhiteChecked=False
rows=8
cols=8
#init()
# Initialize serial connection
ser = serial.Serial('/dev/ttyACM0', 9600)
# Continuously listen for voice input!
while True:
input_string = sys.stdin.readline()
print "Decoder received: " + input_string
if not input_string.startswith('Wizard Chess:'):
print "Bad input!"
continue
input_string = input_string[14:]
print "Processed input: " + input_string
input_words = input_string.split();
print "Input length: " + str(len(input_words))
for item in input_words:
print "item = " + item
if len(input_words) != 5:
print "Bad input!"
continue
row1, col1, row2, col2 = int(input_words[1]) - 1, wordToCol(input_words[0]), int(input_words[4]) - 1, wordToCol(input_words[3])
#if not isLegal(row1, col1, row2, col2, board):
# print "Illegal move!"
# continue
# perform move software-side (including changing players)
#performMove(row1, col1, row2, col2)
# perform move hardware-side
##kill_piece = 0 if (board[row2][col2] == None) else 1
ser.write(str(row1) + " " + str(col1) + " " + str(row2) + " " + str(col2) + " " + "0")
# check for check(mate)?