Moves MoveGenerator::generateOpening(const Board& board) const
{
Moves result;
if(board.getIdleCount() == 0)
{
QMessageBox::critical(0, "error", "idle == 0");
return result;
}
for(int i=0; i<23; ++i)
{
if(board.isEmpty(i))
{
Board next = board.makeChild(); // a clone
next.setManAt(i, board.getSelfColor());
if(next.closeMill(i))
{
Moves removeMoves = generateRemove(next, board.getOpponentColor()); // remove 1 opponent chessman
copy(removeMoves.begin(), removeMoves.end(), back_inserter(result));
}
else
result.push_back(next);
}
}
return result;
}
/*-----------------------------------------------------------------------------*/
void Notation::DeleteBranch(int no)
{
MoveKif* move = this->move_current_; // 一旦カレントに対する操作にしておく
Moves* moves = this->current_moves_;
int num = this->number();
if (no == -1)
{
int pos = num - (*moves)[0].number();
// 次の要素から最後までを削除
moves->erase(moves->begin() + pos + 1, moves->end());
if (move->branches().size() != 0)
{
// ブランチをずらす
moves->insert(moves->end(), move->branches()[0]->begin(), move->branches()[0]->end());
move->DeleteBranch(0);
}
}
else
{
move->DeleteBranch(no);
}
}
void ConsoleManager::showMoves() const {
Moves moves;
MoveGenerator::generate(record_.getBoard(), moves);
for (auto ite = moves.begin(); ite != moves.end(); ite++) {
if (record_.getBoard().isValidMoveStrict(*ite)) {
std::cout << ite->toString() << ' ';
}
}
std::cout << std::endl;
}
Move bestMove(const Moves& moves)
{
if (!moves.empty())
{
return *min_element(moves.begin(), moves.end());
}
else
{
return Move(Cost::infinity());
}
}
void build_path(ull_t v, const Searched & searched, Moves & steps) {
Searched::const_iterator it = searched.find(v);
while (it != searched.end()) {
const State & s = it->second;
steps.push_back(s.step);
it = searched.find(s.parent);
}
//pop up the first step, which must be 0, rather than one of U,D,L,R
steps.pop_back();
reverse(steps.begin(), steps.end());
}
/*-----------------------------------------------------------------------------*/
void Notation::AddBranch(const Moves& src_moves)
{
Moves* dest_moves = this->current_moves_; // 一旦カレントで作成
MoveKif* dest_move = this->move_current_;
const MoveKif& last_move = dest_moves->back();
if (&last_move == dest_move)
{
// 追加先が末尾の場合
dest_moves->insert(dest_moves->end(), src_moves.begin(), src_moves.end());
}
else
{
// 追加先が途中の場合
dest_move->AddBranch(dest_moves, src_moves);
}
}
Moves MoveGenerator::generateHopping(const Board& board) const
{
Moves result;
for(int from=0; from<23; ++from)
if(board.getManAt(from) == board.getSelfColor())
{
for(int to=0; to<23; ++to)
if(board.isEmpty(to))
{
Board next = board.makeChild();
next.move(from, to);
if(next.closeMill(to))
{
Moves removeMoves = generateRemove(next, board.getOpponentColor());
copy(removeMoves.begin(), removeMoves.end(), back_inserter(result));
}
else
result.push_back(next);
}
}
return result;
}
Moves MoveGenerator::generateMove(const Board& board) const
{
Moves result;
for(int from=0; from<23; ++from)
if(board.getManAt(from) == board.getSelfColor())
{
Neighbors neighbors = Board::getNeighbors(from);
for(Neighbors::iterator it = neighbors.begin(); it != neighbors.end(); ++it)
if(board.isEmpty(*it))
{
Board next = board.makeChild();
next.move(from, *it);
if(next.closeMill(*it))
{
Moves removeMoves = generateRemove(next, board.getOpponentColor());
copy(removeMoves.begin(), removeMoves.end(), back_inserter(result));
}
else
result.push_back(next);
}
}
return result;
}
int ChessBoard::alphaBetaSearch(int depth, int alpha, int beta)
{
//1.到达水平线返回
if (depth==0)
{
return evaluate();
}
m_searchCallTimes++;
//2.初使化最佳值,最佳走法
int vlBest = -MATE_VALUE;
int mvBest = 0;
//3.生成走法,根据历史表排序
Moves mvs;
generateMoves(mvs);
//PrintMoves(mvs);
qSort(mvs.begin(), mvs.end(), compareLessTan);
//PrintMoves(mvs);
//qDebug()<<"----------------------";
// 4. 逐一走这些走法，并进行递归
for(int i=0; i<mvs.count(); i++)
{
//列出走法
int pcCaptured;
if (makeMove(mvs[i], pcCaptured))
{
int vl = -alphaBetaSearch(depth - 1, -beta, -alpha);
undoMakeMove(mvs[i], pcCaptured);
//qDebug()<<mvString(mvs[i])<<" vl="<<vl;
//进行Alpha-Beta大小判断和截断
if (vl > vlBest)
{
// 找到最佳值(但不能确定是Alpha、PV还是Beta走法)
vlBest = vl; // "vlBest"就是目前要返回的最佳值，可能超出Alpha-Beta边界
if (vl >= beta)
{
// 找到一个Beta走法
mvBest = mvs[i]; // Beta走法要保存到历史表
break; // Beta截断
}
if (vl > alpha)
{
// 找到一个PV走法
mvBest = mvs[i]; // PV走法要保存到历史表
alpha = vl; // 缩小Alpha-Beta边界
}
}
}
}
// 5. 所有走法都搜索完了，把最佳走法(不能是Alpha走法)保存到历史表，返回最佳值
if (vlBest == -MATE_VALUE)
{
// 如果是杀棋，就根据杀棋步数给出评价
return m_distance - MATE_VALUE;
}
//qDebug()<<"mvBest="<<mvBest<<" distance="<<m_distance;
if (mvBest != 0)
{
// 如果不是Alpha走法，就将最佳走法保存到历史表
m_historyTable[mvBest] += depth * depth;
if (m_distance==0)
{
// 搜索根节点时，总是有一个最佳走法(因为全窗口搜索不会超出边界)，将这个走法保存下来
m_mvComputer = mvBest;
}
}
return vlBest;
}