def tip_mobility(model, ply, phase):
board = model.getBoardAtPly(ply).board
colorBackup = board.color
# People need a chance to get developed
# if model.ply < 16:
# return
board.setColor(WHITE)
wmoves = len([
move for move in genAllMoves(board)
if KNIGHT <= board.arBoard[FCORD(move)] <= QUEEN
and bitPosArray[TCORD(move)]
& brank48[WHITE] and staticExchangeEvaluate(board, move) >= 0
])
board.setColor(BLACK)
bmoves = len([
move for move in genAllMoves(board)
if KNIGHT <= board.arBoard[FCORD(move)] <= QUEEN
and bitPosArray[TCORD(move)]
& brank48[BLACK] and staticExchangeEvaluate(board, move) >= 0
])
board.setColor(colorBackup)
if wmoves - phase >= (bmoves + 1) * 7:
yield wmoves - bmoves, _("Black has a rather cramped position")
elif wmoves - phase >= (bmoves + 1) * 3:
yield wmoves - bmoves, _("Black has a slightly cramped position")
elif bmoves - phase >= (wmoves + 1) * 7:
yield wmoves - bmoves, _("White has a rather cramped position")
elif bmoves - phase >= (wmoves + 1) * 3:
yield wmoves - bmoves, _("White has a slightly cramped position")
def tip_mobility(model, ply, phase):
board = model.getBoardAtPly(ply).board
colorBackup = board.color
# People need a chance to get developed
# if model.ply < 16:
# return
board.setColor(WHITE)
wmoves = len([move for move in genAllMoves(board) if
KNIGHT <= board.arBoard[FCORD(move)] <= QUEEN and
bitPosArray[TCORD(move)] & brank48[WHITE] and
staticExchangeEvaluate(board, move) >= 0])
board.setColor(BLACK)
bmoves = len([move for move in genAllMoves(board) if
KNIGHT <= board.arBoard[FCORD(move)] <= QUEEN and
bitPosArray[TCORD(move)] & brank48[BLACK] and
staticExchangeEvaluate(board, move) >= 0])
board.setColor(colorBackup)
if wmoves - phase >= (bmoves + 1) * 7:
yield wmoves - bmoves, _("Black has a rather cramped position")
elif wmoves - phase >= (bmoves + 1) * 3:
yield wmoves - bmoves, _("Black has a slightly cramped position")
elif bmoves - phase >= (wmoves + 1) * 7:
yield wmoves - bmoves, _("White has a rather cramped position")
elif bmoves - phase >= (wmoves + 1) * 3:
yield wmoves - bmoves, _("White has a slightly cramped position")
def attack_type(model, ply, phase):
# We set bishop value down to knight value, as it is what most people expect
bishopBackup = PIECE_VALUES[BISHOP]
PIECE_VALUES[BISHOP] = PIECE_VALUES[KNIGHT]
board = model.getBoardAtPly(ply).board
oldboard = model.getBoardAtPly(ply - 1).board
if ply - model.lowply >= 2:
oldmove = model.getMoveAtPly(ply - 2).move
oldboard3 = model.getBoardAtPly(ply - 2).board
else:
oldmove = None
move = model.getMoveAtPly(ply - 1).move
tcord = TCORD(move)
if oldboard.arBoard[tcord] != EMPTY:
if not (board.variant == FISCHERRANDOMCHESS and FLAG(move) in (KING_CASTLE, QUEEN_CASTLE)):
if oldmove and oldboard3.arBoard[TCORD(oldmove)] != EMPTY and TCORD(oldmove) == tcord:
yield _("takes back material")
else:
see = staticExchangeEvaluate(oldboard, move)
if see < 0:
yield _("sacrifies material")
elif see == 0:
yield _("exchanges material")
elif see > 0:
yield _("captures material")
PIECE_VALUES[BISHOP] = bishopBackup
def attack_type(model, ply, phase):
# We set bishop value down to knight value, as it is what most people expect
bishopBackup = PIECE_VALUES[BISHOP]
PIECE_VALUES[BISHOP] = PIECE_VALUES[KNIGHT]
board = model.getBoardAtPly(ply).board
oldboard = model.getBoardAtPly(ply - 1).board
if ply - model.lowply >= 2:
oldmove = model.getMoveAtPly(ply - 2).move
oldboard3 = model.getBoardAtPly(ply - 2).board
else:
oldmove = None
move = model.getMoveAtPly(ply - 1).move
tcord = TCORD(move)
if oldboard.arBoard[tcord] != EMPTY:
if not (board.variant == FISCHERRANDOMCHESS and \
FLAG(move) in (KING_CASTLE, QUEEN_CASTLE)):
if oldmove and oldboard3.arBoard[TCORD(oldmove)] != EMPTY and \
TCORD(oldmove) == tcord:
yield _("takes back material")
else:
see = staticExchangeEvaluate(oldboard, move)
if see < 0:
yield _("sacrifies material")
elif see == 0:
yield _("exchanges material")
elif see > 0:
yield _("captures material")
PIECE_VALUES[BISHOP] = bishopBackup
def defencive_moves_tactic(model, ply, phase):
# ------------------------------------------------------------------------ #
# Test if we threat something, or at least put more pressure on it #
# ------------------------------------------------------------------------ #
# We set bishop value down to knight value, as it is what most people expect
bishopBackup = PIECE_VALUES[BISHOP]
PIECE_VALUES[BISHOP] = PIECE_VALUES[KNIGHT]
board = model.getBoardAtPly(ply).board
oldboard = model.getBoardAtPly(ply - 1).board
move = model.getMoveAtPly(ply - 1).move
fcord = FCORD(move)
tcord = TCORD(move)
found_threatens = []
found_increases = []
# What do we attack now?
board.setColor(1 - board.color)
for ncap in genCaptures(board):
# getCaptures also generate promotions
if FLAG(ncap) in PROMOTIONS:
continue
# We are only interested in the attacks of the piece we just moved
if FCORD(ncap) != TCORD(move):
continue
# We don't want to move back
if TCORD(ncap) == FCORD(move):
continue
# We don't thread the king. We check him! (in another function)
if board.arBoard[TCORD(ncap)] == KING:
continue
# If we also was able to attack that cord last time, we don't care
if validateMove(oldboard, newMove(FCORD(move), TCORD(ncap))):
continue
# Test if we threats our enemy, at least more than before
see0 = staticExchangeEvaluate(oldboard, TCORD(ncap),
1 - oldboard.color)
see1 = staticExchangeEvaluate(board, TCORD(ncap), 1 - oldboard.color)
if see1 > see0:
# If a new winning capture has been created
if see1 > 0:
# Find the easiest attack
attacks = getAttacks(board, TCORD(ncap), board.color)
v, cord = min((PIECE_VALUES[board.arBoard[fc]], fc)
for fc in iterBits(attacks))
easiestAttack = newMove(cord, TCORD(ncap))
found_threatens.append(toSAN(board, easiestAttack, True))
# Even though we might not yet be strong enough, we might still
# have strengthened another friendly attack
else:
found_increases.append(reprCord[TCORD(ncap)])
board.setColor(1 - board.color)
# -------------------------------------------------------------------- #
# Test if we defend a one of our pieces #
# -------------------------------------------------------------------- #
found_defends = []
# Test which pieces were under attack
used = []
for ncap in genCaptures(board):
# getCaptures also generate promotions
if FLAG(ncap) in PROMOTIONS:
continue
# We don't want to know about the same cord more than once
if TCORD(ncap) in used:
continue
used.append(TCORD(ncap))
# If the attack was poining on the piece we just moved, we ignore it
if TCORD(ncap) == FCORD(move) or TCORD(ncap) == TCORD(move):
continue
# If we were already defending the piece, we don't send a new
# message
if defends(oldboard, FCORD(move), TCORD(ncap)):
continue
# If the attack was not strong, we ignore it
see = staticExchangeEvaluate(oldboard, ncap)
if see < 0:
continue
v = defends(board, TCORD(move), TCORD(ncap))
# If the defend didn't help, it doesn't matter. Like defending a
# bishop, threatened by a pawn, with a queen.
# But on the other hand - it might still be a defend...
# newsee = staticExchangeEvaluate(board, ncap)
# if newsee <= see: continue
if v:
found_defends.append(reprCord[TCORD(ncap)])
# ------------------------------------------------------------------------ #
# Test if we are rescuing an otherwise exposed piece #
# ------------------------------------------------------------------------ #
# Rescuing is only an option, if our own move wasn't an attack
if oldboard.arBoard[tcord] == EMPTY:
see0 = staticExchangeEvaluate(oldboard, fcord, oldboard.color)
see1 = staticExchangeEvaluate(board, tcord, oldboard.color)
if see1 > see0 and see1 > 0:
yield _("rescues a %s") % reprPiece[board.arBoard[tcord]].lower()
if found_threatens:
yield _("threatens to win material by %s") % join(found_threatens)
if found_increases:
yield _("increases the pressure on %s") % join(found_increases)
if found_defends:
yield _("defends %s") % join(found_defends)
PIECE_VALUES[BISHOP] = bishopBackup
def defencive_moves_tactic(model, ply, phase):
# ------------------------------------------------------------------------ #
# Test if we threat something, or at least put more pressure on it #
# ------------------------------------------------------------------------ #
# We set bishop value down to knight value, as it is what most people expect
bishopBackup = PIECE_VALUES[BISHOP]
PIECE_VALUES[BISHOP] = PIECE_VALUES[KNIGHT]
board = model.getBoardAtPly(ply).board
oldboard = model.getBoardAtPly(ply - 1).board
move = model.getMoveAtPly(ply - 1).move
fcord = FCORD(move)
tcord = TCORD(move)
found_threatens = []
found_increases = []
# What do we attack now?
board.setColor(1 - board.color)
for ncap in genCaptures(board):
# getCaptures also generate promotions
if FLAG(ncap) in PROMOTIONS:
continue
# We are only interested in the attacks of the piece we just moved
if FCORD(ncap) != TCORD(move):
continue
# We don't want to move back
if TCORD(ncap) == FCORD(move):
continue
# We don't thread the king. We check him! (in another function)
if board.arBoard[TCORD(ncap)] == KING:
continue
# If we also was able to attack that cord last time, we don't care
if validateMove(oldboard, newMove(FCORD(move), TCORD(ncap))):
continue
# Test if we threats our enemy, at least more than before
see0 = staticExchangeEvaluate(oldboard, TCORD(ncap),
1 - oldboard.color)
see1 = staticExchangeEvaluate(board, TCORD(ncap), 1 - oldboard.color)
if see1 > see0:
# If a new winning capture has been created
if see1 > 0:
# Find the easiest attack
attacks = getAttacks(board, TCORD(ncap), board.color)
v, cord = min((PIECE_VALUES[board.arBoard[fc]], fc)
for fc in iterBits(attacks))
easiestAttack = newMove(cord, TCORD(ncap))
found_threatens.append(toSAN(board, easiestAttack, True))
# Even though we might not yet be strong enough, we might still
# have strengthened another friendly attack
else:
found_increases.append(reprCord[TCORD(ncap)])
board.setColor(1 - board.color)
# -------------------------------------------------------------------- #
# Test if we defend a one of our pieces #
# -------------------------------------------------------------------- #
found_defends = []
# Test which pieces were under attack
used = []
for ncap in genCaptures(board):
# getCaptures also generate promotions
if FLAG(ncap) in PROMOTIONS:
continue
# We don't want to know about the same cord more than once
if TCORD(ncap) in used:
continue
used.append(TCORD(ncap))
# If the attack was poining on the piece we just moved, we ignore it
if TCORD(ncap) == FCORD(move) or TCORD(ncap) == TCORD(move):
continue
# If we were already defending the piece, we don't send a new
# message
if defends(oldboard, FCORD(move), TCORD(ncap)):
continue
# If the attack was not strong, we ignore it
see = staticExchangeEvaluate(oldboard, ncap)
if see < 0:
continue
v = defends(board, TCORD(move), TCORD(ncap))
# If the defend didn't help, it doesn't matter. Like defending a
# bishop, threatened by a pawn, with a queen.
# But on the other hand - it might still be a defend...
# newsee = staticExchangeEvaluate(board, ncap)
# if newsee <= see: continue
if v:
found_defends.append(reprCord[TCORD(ncap)])
# ------------------------------------------------------------------------ #
# Test if we are rescuing an otherwise exposed piece #
# ------------------------------------------------------------------------ #
# Rescuing is only an option, if our own move wasn't an attack
if oldboard.arBoard[tcord] == EMPTY:
see0 = staticExchangeEvaluate(oldboard, fcord, oldboard.color)
see1 = staticExchangeEvaluate(board, tcord, oldboard.color)
if see1 > see0 and see1 > 0:
yield _("rescues a %s") % reprPiece[board.arBoard[tcord]].lower()
if found_threatens:
yield _("threatens to win material by %s") % join(found_threatens)
if found_increases:
yield _("increases the pressure on %s") % join(found_increases)
if found_defends:
yield _("defends %s") % join(found_defends)
PIECE_VALUES[BISHOP] = bishopBackup
