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higher depth accuracy #5

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81 changes: 44 additions & 37 deletions chesslib/board.py
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,6 @@ class NotYourTurn(ChessError): pass
FEN_STARTING = 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1'
RANK_REGEX = re.compile(r"^[A-Z][1-8]$")
total_time=0
count_moves=0
class Board(dict):
'''
Board
Expand Down Expand Up @@ -148,65 +147,72 @@ def all_possible_moves(self, color):

#minmax algo
def minmax(self, count_turns, p1, p2, alpha ,beta):
#tmp = deepcopy(self)
# print p1,p2
global total_time

global count_moves
count_moves+=1
#print count_moves
st=time.time()
self._do_move(p1,p2)
if count_turns==2:
value=self.state_value()
return value
if count_turns%2==0:
self.player_turn="white"
valid_move=self.check()
for i in range(0,len(valid_move)):
p3,p4=valid_move[i].split("+")
piece2=self[p4]
k=self.minmax(count_turns+1,p3,p4,alpha,beta)
self.player_turn="white"
self._do_move(p4, p3)
if piece2 is not None:
self[p4]=piece2
if k<beta:
beta=k
if alpha>=beta:
break;
return beta

else:
self.player_turn="black"
start=time.time()
valid_move=self.check()
end=time.time()
for i in range(0,len(valid_move)):
p3,p4=valid_move[i].split("+")
piece2=self[p4]
if alpha>=beta:
break;
k=self.minmax(count_turns+1,p3,p4,alpha,beta)
self._do_move(p4, p3)
if piece2 is not None:
self[p4]=piece2
if count_turns%2==0:
self.player_turn="white"
if k>alpha:
alpha=k
else:
valid_move=self.check()
for i in range(0,len(valid_move)):
p3,p4=valid_move[i].split("+")
piece2=self[p4]
k=self.minmax(count_turns+1,p3,p4,alpha,beta)
self.player_turn="black"
if k<beta:
beta=k
total_time+=end-start
print(total_time)
if count_turns%2==0:
self._do_move(p4, p3)
if piece2 is not None:
self[p4]=piece2
if k > alpha:
alpha=k
if alpha>=beta:
break
return alpha
else:
return beta

def check(self):
global total_time
valid_moves=[]
v_m=[]
for i in range (0,8):
for j in range (0,8):
pos = self.letter_notation((i,j))
st1=time.time()
temp_moves=self.occupied(self.player_turn)
#print(len(temp_moves))
for pos in temp_moves:
piece = self[pos]
#print(piece)
if piece is not None and (piece.color == self.player_turn):
st3=time.time()
all_moves=piece.possible_moves(pos)
start=time.time()
end3=time.time()
st2=time.time()
for k in range(0,len(all_moves)):
pos1=all_moves[k]
valid_moves.append(pos+'+'+pos1)
piece2=self[pos1]
if piece2 is not None:
v_m.append(pos+'+'+pos1)
end = time.time()
#print(total_time)
v_m.append(pos+'+'+pos1)
end2=time.time()
#print(end2-st2)
end1=time.time()
print(end1-st1,end3-st3)
if len(v_m)>0:
return v_m
else:
Expand All @@ -220,6 +226,7 @@ def state_value(self):
piece = self[pos]
if piece is not None:
sum+=self.assign_val(piece.abbriviation)
print(sum)
return sum

#assign value to piece
Expand Down