void GoGame::PlaceHandicap(const SgVector<SgPoint>& stones)
{
SG_ASSERT(GoBoardUtil::IsBoardEmpty(m_board));
SgNode* node = m_current;
if (node->HasSon())
node = node->NewRightMostSon();
SgPropAddStone* addBlack = new SgPropAddStone(SG_PROP_ADD_BLACK);
for (SgVectorIterator<SgPoint> it(stones); it; ++it)
addBlack->PushBack(*it);
node->Add(addBlack);
SgPropInt* handicap = new SgPropInt(SG_PROP_HANDICAP, stones.Length());
node->Add(handicap);
node->Add(new SgPropPlayer(SG_PROP_PLAYER, SG_WHITE));
m_board.Rules().SetHandicap(stones.Length());
GoToNode(node);
}
/** Generates a move using WolveSearch. */
HexPoint WolvePlayer::Search(const HexState& state, const Game& game,
HexBoard& brd, const bitset_t& consider,
double maxTime, double& outScore)
{
UNUSED(game);
m_search.SetRootMovesToConsider(consider);
m_search.SetWorkBoard(&brd);
m_search.SetHashTable(m_hashTable.get());
m_search.SetToPlay(HexSgUtil::HexColorToSgColor(state.ToPlay()));
SgVector<SgMove> PV;
WolveSearchControl timeControl(maxTime, m_useEarlyAbort, PV);
m_search.SetSearchControl(&timeControl);
std::size_t minDepth = MinDepth();
std::size_t maxDepth = MaxDepth();
if (!m_search.SpecificPlyWidths().empty())
{
LogInfo() << "Using specific plywidths!!\n";
if (maxDepth > m_search.SpecificPlyWidths().size())
{
maxDepth = m_search.SpecificPlyWidths().size();
LogWarning() << "Max depth exceeds depth specified in ply_width!\n"
<< "Capping maxDepth to be safe.\n";
}
}
LogInfo() << "minDepth=" << minDepth << ' '
<< "maxDepth=" << maxDepth << '\n';
int score = m_search.IteratedSearch(int(minDepth), int(maxDepth),
-SgSearchValue::MIN_PROVEN_VALUE,
+SgSearchValue::MIN_PROVEN_VALUE, &PV,
false);
if (m_search.GuiFx())
WolveSearchUtil::DumpGuiFx(state, *m_hashTable);
LogInfo() << PrintStatistics(score, PV);
outScore = score;
if (PV.Length() > 0)
return static_cast<HexPoint>(PV[0]);
LogWarning() << "**** WolveSearch returned empty sequence!\n"
<< "**** Returning random move!\n";
return BoardUtil::RandomEmptyCell(state.Position());
}
/** Play prey move and update all the relevant information.
Extend the prey by playing at its only liberty, or capture a block
adjacent to the prey. */
int GoLadder::PlayPreyMove(int depth, SgPoint move, SgPoint lib1,
const GoPointList& adjBlk,
SgVector<SgPoint>* sequence)
{
int result = 0;
GoPointList newAdj(adjBlk);
SgVector<SgPoint> newLib;
SgVector<SgPoint> newStones;
SgVector<SgPoint> neighbors;
if (move == lib1)
{
NeighborsOfColor(*m_bd, move, m_preyColor, &neighbors);
for (SgVectorIterator<SgPoint> iter(neighbors); iter; ++iter)
{
SgPoint block = *iter;
if (! m_partOfPrey[block])
{
MarkStonesAsPrey(block, &newStones);
GoPointList temp =
GoBoardUtil::AdjacentStones(*m_bd, block);
newAdj.PushBackList(temp);
for (GoBoard::LibertyIterator it(*m_bd, block); it; ++it)
newLib.Include(*it);
}
}
m_partOfPrey.Include(move);
}
if (PlayIfLegal(*m_bd, move, m_preyColor))
{
if (move == lib1)
{
NeighborsOfColor(*m_bd, move, SG_EMPTY, &neighbors);
for (SgVectorIterator<SgPoint> iter(newLib); iter; ++iter)
{
SgPoint point = *iter;
// Test for Empty is necessary because newLib will include
// the move just played.
if (m_bd->IsEmpty(point))
neighbors.Include(point);
}
}
else
{
neighbors.PushBack(lib1);
}
if (m_bd->CapturingMove())
{ // Add the points at the captured stones that are adjacent to the
// prey to the liberties, at least if exactly one stone captured.
for (GoPointList::Iterator it(m_bd->CapturedStones()); it;
++it)
{
SgPoint stone = *it;
if (PointIsAdjToPrey(stone))
neighbors.Include(stone);
}
}
SG_ASSERT(! neighbors.IsEmpty());
lib1 = neighbors[0];
SG_ASSERT(m_bd->IsEmpty(lib1));
SgArrayList<SgPoint,4> temp =
NeighborsOfColor(*m_bd, move, m_hunterColor);
newAdj.PushBackList(temp);
FilterAdjacent(newAdj);
if (neighbors.Length() == 1)
result = HunterLadder(depth + 1, lib1, newAdj, sequence);
else if (neighbors.Length() == 2)
{
SgPoint lib2 = neighbors[1];
SG_ASSERT(m_bd->IsEmpty(lib2));
result = HunterLadder(depth + 1, lib1, lib2, newAdj, sequence);
}
else // 3 <= numLib
{
if (sequence)
sequence->Clear();
result = GOOD_FOR_PREY - (depth + 1);
}
if (sequence)
sequence->PushBack(move);
m_bd->Undo();
}
else
{
if (sequence)
sequence->Clear();
result = GOOD_FOR_HUNTER + depth;
}
m_partOfPrey.Exclude(move);
m_partOfPrey.Exclude(newStones);
return result;
}
