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  Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
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  Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
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  Copyright (C) 2015-2018 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
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  Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
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  Stockfish is free software: you can redistribute it and/or modify
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  Stockfish is free software: you can redistribute it and/or modify
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  it under the terms of the GNU General Public License as published by
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  it under the terms of the GNU General Public License as published by
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  the Free Software Foundation, either version 3 of the License, or
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  the Free Software Foundation, either version 3 of the License, or
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  (at your option) any later version.
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  (at your option) any later version.
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/// to the pawn hash table (performed by calling the probe function) returns a
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/// to the pawn hash table (performed by calling the probe function) returns a
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/// pointer to an Entry object.
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/// pointer to an Entry object.
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struct Entry {
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struct Entry {
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  Score pawns_score() const { return score; }
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  Score pawn_score(Color c) const { return scores[c]; }
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  Bitboard pawn_attacks(Color c) const { return pawnAttacks[c]; }
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  Bitboard pawn_attacks(Color c) const { return pawnAttacks[c]; }
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  Bitboard passed_pawns(Color c) const { return passedPawns[c]; }
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  Bitboard passed_pawns(Color c) const { return passedPawns[c]; }
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  Bitboard pawn_attacks_span(Color c) const { return pawnAttacksSpan[c]; }
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  Bitboard pawn_attacks_span(Color c) const { return pawnAttacksSpan[c]; }
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  int weak_unopposed(Color c) const { return weakUnopposed[c]; }
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  int weak_unopposed(Color c) const { return weakUnopposed[c]; }
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  int pawn_asymmetry() const { return asymmetry; }
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  int pawn_asymmetry() const { return asymmetry; }
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  int open_files() const { return openFiles; }
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  int open_files() const { return openFiles; }
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  int semiopen_file(Color c, File f) const {
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  int semiopen_file(Color c, File f) const {
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    return semiopenFiles[c] & (1 << f);
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    return semiopenFiles[c] & (1 << f);
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  }
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  int semiopen_side(Color c, File f, bool leftSide) const {
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    return semiopenFiles[c] & (leftSide ? (1 << f) - 1 : ~((1 << (f + 1)) - 1));
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  }
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  }
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  int pawns_on_same_color_squares(Color c, Square s) const {
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  int pawns_on_same_color_squares(Color c, Square s) const {
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    return pawnsOnSquares[c][bool(DarkSquares & s)];
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    return pawnsOnSquares[c][bool(DarkSquares & s)];
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  }
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  }
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  template<Color Us>
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  template<Color Us>
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  Score king_safety(const Position& pos, Square ksq) {
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  Score king_safety(const Position& pos) {
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    return  kingSquares[Us] == ksq && castlingRights[Us] == pos.can_castle(Us)
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    return  kingSquares[Us] == pos.square<KING>(Us) && castlingRights[Us] == pos.can_castle(Us)
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          ? kingSafety[Us] : (kingSafety[Us] = do_king_safety<Us>(pos, ksq));
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          ? kingSafety[Us] : (kingSafety[Us] = do_king_safety<Us>(pos));
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  }
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  }
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  template<Color Us>
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  template<Color Us>
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  Score do_king_safety(const Position& pos, Square ksq);
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  Score do_king_safety(const Position& pos);
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  template<Color Us>
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  template<Color Us>
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  Value shelter_storm(const Position& pos, Square ksq);
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  Value evaluate_shelter(const Position& pos, Square ksq);
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  Key key;
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  Key key;
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  Score score;
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  Score scores[COLOR_NB];
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  Bitboard passedPawns[COLOR_NB];
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  Bitboard passedPawns[COLOR_NB];
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  Bitboard pawnAttacks[COLOR_NB];
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  Bitboard pawnAttacks[COLOR_NB];
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  Bitboard pawnAttacksSpan[COLOR_NB];
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  Bitboard pawnAttacksSpan[COLOR_NB];
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  Square kingSquares[COLOR_NB];
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  Square kingSquares[COLOR_NB];
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  Score kingSafety[COLOR_NB];
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  Score kingSafety[COLOR_NB];