1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
import re
from .BCalcWrapper import BCalcWrapper as bcw
from .ParContract import ParContract
from .Exceptions import FieldNotFoundException
class ParScore(object):
_pbn_contract_pattern = re.compile(r'(\d)([CDHSN])(X?)\s+([NESW])')
_pbn_score_pattern = re.compile(r'(NS|EW)\s+(-?\d})')
_jfr_contract_pattern = re.compile(r'^(\d)([CDHSN])(D?)([NESW])(-?\d+)$')
def __init__(self, board):
self._board = board
def get_pbn_par_contract(self):
contract_field = self._board.get_optimum_result()
if 'Pass' == contract_field:
return ParContract()
contract_match = self._pbn_contract_pattern.match(contract_field)
if not contract_match:
raise ParScoreInvalidException(
'Invalid format for OptimumResult field: ' + contract_field)
score_field = self._board.get_optimum_score()
score_match = self._pbn_score_pattern.match(score_field)
if not score_match:
raise ParScoreInvalidException(
'Invalid format for OptimumScore field: ' + scoreField)
score = int(score_match.group(2))
if 'EW' == score_match.group(1):
score = -score
contract = ParContract(
int(contract_match.group(1)),
contract_match.group(2)[0],
contract_match.group(4)[0],
'X' == contract_match.group(3),
score)
return contract.validate()
def get_jfr_par_contract(self):
par_string = self._board.get_minimax()
par_match = self._jfr_contract_pattern.match(par_string)
if not par_match:
raise ParScoreInvalidException(
'Invalid format for Minimax field: ' + par_string)
if '0' == par_match.group(4):
return ParContract() # pass-out
contract = ParContract(
int(par_match.group(1)),
par_match.group(2)[0],
par_match.group(4)[0],
'D' == par_match.group(3),
int(par_match.group(5)))
return contract.validate()
def _determine_vulnerability(self, vulnerability, declarer):
vulnerability = vulnerability.upper()
return vulnerability in ['ALL', 'BOTH'] \
or (vulnerability not in ['LOVE', 'NONE'] \
and declarer in vulnerability)
def _get_highest_makeable_contract(self, dd_table,
for_ns=True, for_ew=True):
contract = ParContract()
tricks = 0
for i in range(3, -1, -1):
if ((i % 2 == 0) and for_ns) \
or ((i % 2 == 1) and for_ew):
for j in range(0, 5):
level = dd_table[i][j] - 6
denomination = bcw.DENOMINATIONS.index(
contract.denomination) \
if contract.denomination in bcw.DENOMINATIONS \
else -1
if (level > contract.level) \
or ((level == contract.level) \
and (j > denomination)):
contract.level = level
contract.denomination = bcw.DENOMINATIONS[j]
contract.declarer = bcw.PLAYERS[i]
tricks = dd_table[i][j]
vulnerability = self._board.get_vulnerable().upper()
vulnerable = self._determine_vulnerability(
vulnerability, contract.declarer)
contract.score = contract.calculate_score(tricks, vulnerable)
return contract
def get_dd_table_par_contract(self, dd_table):
dealer = self._board.get_dealer()
vulnerability = self._board.get_vulnerable().upper()
ns_highest = self._get_highest_makeable_contract(
dd_table, True, False);
ew_highest = self._get_highest_makeable_contract(
dd_table, False, True)
if ns_highest == ew_highest:
return ns_highest.validate() \
if dealer in ['N', 'S'] else ew_highest.validate()
highest = max(ns_highest, ew_highest)
other_side_highest = min(ew_highest, ns_highest)
ns_playing = highest.declarer in ['N', 'S']
defense_vulnerability = self._determine_vulnerability(
vulnerability, 'E' if ns_playing else 'N')
highest_defense = highest.get_defense(dd_table, defense_vulnerability)
if highest_defense is not None:
# Highest contract has profitable defense
return highest_defense.validate()
denomination_index = bcw.DENOMINATIONS.index(highest.denomination) \
if highest.denomination in bcw.DENOMINATIONS \
else -1
declarer_index = bcw.PLAYERS.index(highest.declarer) \
if highest.declarer in bcw.PLAYERS else -1
player_indexes = [declarer_index, (declarer_index + 2) % 4]
vulnerable = self._determine_vulnerability(
vulnerability, highest.declarer)
score_squared = highest.score * highest.score
possible_optimums = []
for i in range(0, 5):
for player in player_indexes:
level = highest.level
if i > denomination_index:
level -= 1
while level > 0:
contract = ParContract(
level,
bcw.DENOMINATIONS[i],
bcw.PLAYERS[player],
False, 0)
contract.score = contract.calculate_score(
dd_table[player][i], vulnerable)
if other_side_highest > contract:
# Contract is lower than other side's contract
break
if (highest.score * contract.score) > 0:
# Contract makes
if abs(contract.score) >= abs(highest.score):
# Contract is profitable
defense = contract.get_defense(
dd_table, defense_vulnerability)
if defense is not None \
and (contract.score * contract.score) \
> (contract.score * defense.score):
# Contract has defense
possible_optimums.append(defense)
# So lower contracts will too.
break
else:
# Contract does not have defense
possible_optimums.append(contract)
else:
# Contract is not profitable
break
level -= 1
for contract in possible_optimums:
if abs(contract.score) > abs(highest.score):
# Contract is more profitable
highest = contract
else:
if contract.score == highest.score:
if highest > contract:
# Equally profitable, but lower
highest = contract
return highest.validate()
def get_par_contract(self, dd_table):
try:
return self.get_jfr_par_contract()
except FieldNotFoundException:
try:
return self.get_pbn_par_contract()
except FieldNotFoundException:
return self.get_dd_table_par_contract(dd_table)
|
