search_ab.h

Go to the documentation of this file.

/*---------------------------------------------------------------------+
 * File: search_ab.h
 * Project: part of belofte - A Promising Chess Program
 * Author: yves
 * SPDX-License-Identifier: GPL-2.0-only
+----------------------------------------------------------------------*/
 
#if !defined(SEARCH_AB_H)
#define SEARCH_AB_H
 
//-----------------------------------------------------------------------
 
class SearchAlphaBeta : public bSearchAlgorithm {
protected:
  explicit SearchAlphaBeta(std::string const& s)
    : bSearchAlgorithm(s)
    , m_nBetaCutOffMargin{SCORE_BETAMARGIN}
    { m_iterativesearch = true; }
 
public:
  explicit SearchAlphaBeta()
    : bSearchAlgorithm(ALPHABETA)
    , m_nBetaCutOffMargin{SCORE_BETAMARGIN}
    { m_iterativesearch = true; }
  ~SearchAlphaBeta() override
    {}
 
  // no copy or move ctor nor assignment defined
  SearchAlphaBeta(SearchAlphaBeta const&) = delete;
  SearchAlphaBeta(SearchAlphaBeta&&) = delete;
  SearchAlphaBeta& operator=(SearchAlphaBeta const&) = delete;
  SearchAlphaBeta& operator=(SearchAlphaBeta&&) = delete;
 
protected:
  bScore CalcBestMove(bBoard& b, bMoveList& ml) override;
  virtual bScore CalcBestMove(bBoard& b,
          bMoveList& ml, depth_t const nDepth,
          bSearchScore alpha, bSearchScore beta);
  bScore Quiescence(bBoard& b,
          depth_t const nDepth,
          bSearchScore alpha, bSearchScore beta, uint8_t nCheckCount);
 
  bScore m_nBetaCutOffMargin;
};
 
//-----------------------------------------------------------------------
 
#endif // defined SEARCH_AB_H
 
// eof