def defencive_moves_safety(model, ply, phase):
board = model.getBoardAtPly(ply).board
oldboard = model.getBoardAtPly(ply - 1).board
if board.arBoard[TCORD(model.getMoveAtPly(ply - 1).move)] != KING:
return
color = oldboard.color
opcolor = 1 - color
delta_eval_king = leval.evalKing(board, color, phase) - \
leval.evalKing(oldboard, color, phase)
# PyChess points tropism to queen for phase <= 3. Thus we set a high phase
delta_eval_tropism = leval.evalKingTropism(board, opcolor, 10) - \
leval.evalKingTropism(oldboard, opcolor, 10)
# Notice, that tropism was negative
delta_score = delta_eval_king - delta_eval_tropism / 2
if delta_score > 35:
yield _("improves king safety")
elif delta_score > 15:
yield _("slightly improves king safety")
def defencive_moves_safety (model, ply, phase):
board = model.getBoardAtPly(ply).board
oldboard = model.getBoardAtPly(ply-1).board
if board.arBoard[TCORD(model.getMoveAtPly(ply-1).move)] != KING:
return
color = oldboard.color
opcolor = 1-color
delta_eval_king = leval.evalKing(board, color, phase) - \
leval.evalKing(oldboard, color, phase)
# PyChess points tropism to queen for phase <= 3. Thus we set a high phase
delta_eval_tropism = leval.evalKingTropism(board, opcolor, 10) - \
leval.evalKingTropism(oldboard, opcolor, 10)
# Notice, that tropism was negative
delta_score = delta_eval_king - delta_eval_tropism/2
if delta_score > 35:
yield _("improves king safety")
elif delta_score > 15:
yield _("slightly improves king safety")
def simple_tropism(model, ply, phase):
board = model.getBoardAtPly(ply).board
oldboard = model.getBoardAtPly(ply - 1).board
color = oldboard.color
move = model.getMoveAtPly(ply - 1).move
fcord = FCORD(move)
tcord = TCORD(move)
arBoard = board.arBoard
if arBoard[tcord] != PAWN:
score = leval.evalKingTropism(board, color, phase)
oldscore = leval.evalKingTropism(oldboard, color, phase)
else:
if color == WHITE:
rank23 = brank67[BLACK]
else:
rank23 = brank67[WHITE]
if bitPosArray[fcord] & rank23:
yield 2, _("develops a pawn: %s") % reprCord[tcord]
else: yield 1, _("brings a pawn closer to the backrow: %s") % \
reprCord[tcord]
return
king = board.kings[color]
opking = board.kings[1 - color]
if score > oldscore:
# in FISCHERRANDOMCHESS unusual casting case the tcord is
# the involved rook's position, not the king's destination!
flag = move >> 12
if flag in (KING_CASTLE, QUEEN_CASTLE):
piece = KING
else:
piece = arBoard[tcord]
if phase >= 5 or distance[piece][fcord][opking] < \
distance[piece][fcord][king]:
yield score - oldscore, _(
"brings a %(piece)s closer to enemy king: %(cord)s") % {
'piece': reprPiece[piece],
'cord': reprCord[tcord]
}
else:
yield (score -
oldscore) * 2, _("develops a %(piece)s: %(cord)s") % {
'piece': reprPiece[piece].lower(),
'cord': reprCord[tcord]
}
def simple_tropism (model, ply, phase):
board = model.getBoardAtPly(ply).board
oldboard = model.getBoardAtPly(ply-1).board
color = oldboard.color
move = model.getMoveAtPly(ply-1).move
fcord = FCORD(move)
tcord = TCORD(move)
arBoard = board.arBoard
if arBoard[tcord] != PAWN:
score = leval.evalKingTropism(board, color, phase)
oldscore = leval.evalKingTropism(oldboard, color, phase)
else:
if color == WHITE:
rank23 = brank67[BLACK]
else: rank23 = brank67[WHITE]
if bitPosArray[fcord] & rank23:
yield 2, _("develops a pawn: %s") % reprCord[tcord]
else: yield 1, _("brings a pawn closer to the backrow: %s") % \
reprCord[tcord]
return
king = board.kings[color]
opking = board.kings[1-color]
if score > oldscore:
# in FISCHERRANDOMCHESS unusual casting case the tcord is
# the involved rook's position, not the king's destination!
flag = move >> 12
if flag in (KING_CASTLE, QUEEN_CASTLE):
piece = KING
else:
piece = arBoard[tcord]
if phase >= 5 or distance[piece][fcord][opking] < \
distance[piece][fcord][king]:
yield score-oldscore, _("brings a %(piece)s closer to enemy king: %(cord)s") % {
'piece': reprPiece[piece], 'cord': reprCord[tcord]}
else:
yield (score-oldscore)*2, _("develops a %(piece)s: %(cord)s") % {
'piece': reprPiece[piece].lower(), 'cord': reprCord[tcord]}
def simple_tropism (model, phase):
board = model.boards[-1].board
oldboard = model.boards[-2].board
color = oldboard.color
move = model.moves[-1].move
fcord = FCORD(move)
tcord = TCORD(move)
arBoard = board.arBoard
if arBoard[tcord] != PAWN:
score = leval.evalKingTropism(board)
oldboard.setColor(1-oldboard.color)
oldscore = leval.evalKingTropism(oldboard)
oldboard.setColor(1-oldboard.color)
else:
if color == WHITE:
rank23 = brank67[BLACK]
else: rank23 = brank67[WHITE]
if bitPosArray[fcord] & rank23:
yield 2, _("develops a %s: %s") % (reprPiece[PAWN], reprCord[tcord])
else: yield 1, _("brings a pawn closer to the backrow: %s") % \
reprCord[tcord]
return
king = board.kings[color]
opking = board.kings[1-color]
if score > oldscore:
if phase >= 5 or distance[fcord][opking] < distance[fcord][king]:
yield score-oldscore, _("brings a %s closer to enemy king: %s") % \
(reprPiece[arBoard[tcord]], reprCord[tcord])
else:
yield (score-oldscore)*2, _("develops a %s: %s") % \
(reprPiece[arBoard[tcord]], reprCord[tcord])
