def get_children(pos, mtm): # mtm true if i am moving
if pos not in childrens:
relevant = bb.get_relevant(pos)
pos_score = get_score(pos)
m_bb = bb.pos_to_m_bb(pos)
o_bb = bb.pos_to_o_bb(pos)
children = [
do_placement(pos, i, mtm, pos_score, m_bb, o_bb) for i in range(64)
if bb.get_i(relevant, i)
]
#for i in range(64):
# if bb.get_i(relevant, i):
# n_pos = bb.pos_place_i(pos, i, mtm)
# if n_pos not in scores:
# n_m_bb, n_o_bb = bb.pos_to_bb(n_pos)
# pre_prow_score = bb.score_prow_i(m_bb, o_bb, i) - bb.score_prow_i(o_bb, m_bb, i)
# post_prow_score = bb.score_prow_i(n_m_bb, n_o_bb, i) - bb.score_prow_i(n_o_bb, n_m_bb, i)
# scores[n_pos] = pos_score - pre_prow_score + post_prow_score
# children.append(n_pos)
children.sort(key=lambda c: scores[c], reverse=mtm)
childrens[pos] = children
return childrens[pos]
def do_placement(pos, i, mtm, pos_score, m_bb, o_bb):
n_pos = bb.pos_place_i(pos, i, mtm)
if n_pos not in scores:
n_m_bb = bb.pos_to_m_bb(n_pos)
n_o_bb = bb.pos_to_o_bb(n_pos)
pre_prow_score = bb.score_prow_i(m_bb, o_bb, i) - bb.score_prow_i(
o_bb, m_bb, i)
post_prow_score = bb.score_prow_i(n_m_bb, n_o_bb, i) - bb.score_prow_i(
n_o_bb, n_m_bb, i)
scores[n_pos] = pos_score - pre_prow_score + post_prow_score
return n_pos
def score_move(pos, i, mtm): # mtm true if i am moving
new_m_score = m_scores[pos]
new_o_score = o_scores[pos]
m_bb = bitboard.pos_to_m_bb(pos)
o_bb = bitboard.pos_to_o_bb(pos)
new_m_score -= score_i(m_bb, o_bb, i)
new_o_score -= score_i(o_bb, m_bb, i)
if mtm:
m_bb = bitboard.place_i(m_bb, i)
else:
o_bb = bitboard.place_i(o_bb, i)
new_m_score += score_i(m_bb, o_bb, i)
new_o_score += score_i(o_bb, m_bb, i)
new_pos = bitboard.bb_to_pos(m_bb, o_bb)
m_scores[new_pos] = new_m_score
o_scores[new_pos] = new_o_score
return new_m_score - new_o_score
def get_score(pos):
if pos not in scores:
m_bb = bb.pos_to_m_bb(pos)
o_bb = bb.pos_to_o_bb(pos)
scores[pos] = bb.score_bb(m_bb, o_bb) - bb.score_bb(o_bb, m_bb)
return scores[pos]
