/// <summary>
/// Obtains the frequency of a board in the history.
/// </summary>
/// <param name="board">Board to return frequency for.</param>
/// <returns>Frequency of board.</returns>
public int BoardFrequency(Board board)
{
int count;
m_gameHashHistory.TryGetValue(board.BoardHash(false), out count);
return(count);
}
/// <summary>
/// Adds a position to the opening book.
/// </summary>
/// <param name="board">Board with position to add.</param>
/// <param name="adjustValue">value to adjust the boards value with.</param>
public void AddPosition(Board board, int adjustValue)
{
int currentValue = 0;
ZobristHash boardHash = board.BoardHash(true);
m_positionTable.TryGetValue(boardHash, out currentValue);
m_positionTable[boardHash] = currentValue + adjustValue;
}
/// <summary>
/// Adds a board to the history. If the board already exists the frequency is increased.
/// </summary>
/// <param name="board">Board to add.</param>
public void AddBoard(Board board)
{
int count;
ZobristHash hash = board.BoardHash(true);
m_gameHashHistory.TryGetValue(hash, out count);
m_gameHashHistory[hash] = count + 1;
}
/// <summary>
/// Adds a board to the history. If the board already exists the frequency is increased.
/// </summary>
/// <param name="board">Board to add.</param>
public void AddBoard(Board board)
{
int count;
ZobristHash hash = board.BoardHash(true);
m_gameHashHistory.TryGetValue(hash, out count);
m_gameHashHistory[hash] = count + 1;
}
/// <summary>
/// Removes a board from the history. If the frequency for
/// the board is larger then one the frequency is decreased.
/// </summary>
/// <param name="board">Board to remove.</param>
public void RemoveBoard(Board board)
{
int count;
ZobristHash hash = board.BoardHash(true);
m_gameHashHistory.TryGetValue(hash, out count);
if (count > 1)
m_gameHashHistory[hash] = count - 1;
else
m_gameHashHistory.Remove(hash);
}
/// <summary>
/// Removes a board from the history. If the frequency for
/// the board is larger then one the frequency is decreased.
/// </summary>
/// <param name="board">Board to remove.</param>
public void RemoveBoard(Board board)
{
int count;
ZobristHash hash = board.BoardHash(true);
m_gameHashHistory.TryGetValue(hash, out count);
if (count > 1)
{
m_gameHashHistory[hash] = count - 1;
}
else
{
m_gameHashHistory.Remove(hash);
}
}
public Move Query(Board board, MoveOrganizer moveOrganizer)
{
int totalQuaryVal = 0;
m_queryMoves.Clear();
foreach (Move move in moveOrganizer)
{
if (move.Execute(board))
{
int currentQueryVal = 0;
if (board.State.NonHitAndPawnMovesPlayed < 100 &&
board.BoardHistoryFrequency() < 3 &&
m_positionTable.TryGetValue(board.BoardHash(false), out currentQueryVal))
{
totalQuaryVal += currentQueryVal;
m_queryMoves.Add(new QueryEntry(move, currentQueryVal));
}
move.UnExecute(board);
}
}
//select a move using probabilety based on the quary value
int selectValueCurrent = 0;
int selectValueTarget = (int)Math.Round(m_moveSelector.NextDouble() * totalQuaryVal);
for (int i = 0; i < m_queryMoves.Count; ++i)
{
selectValueCurrent += m_queryMoves[i].QueryScore;
if (selectValueCurrent >= selectValueTarget)
{
OutputWriter.Write("Book moves: " + m_queryMoves.Count + ", Selecting: " + Math.Round((float)m_queryMoves[i].QueryScore / (float)totalQuaryVal, 6));
return m_queryMoves[i].QueryMove;
}
}
return null;
}
/// <summary>
/// Obtains the frequency of a board in the history.
/// </summary>
/// <param name="board">Board to return frequency for.</param>
/// <returns>Frequency of board.</returns>
public int BoardFrequency(Board board)
{
int count;
m_gameHashHistory.TryGetValue(board.BoardHash(false), out count);
return count;
}