Merge official-stockfish/master

No functional change.

diff --cc src/endgame.cpp
index f29292e,16c072b..4cc1340
--- 1/src/endgame.cpp
--- 2/src/endgame.cpp
+++ b/src/endgame.cpp
@@@ -86,17 -73,10 +86,17 @@@ namespace 
  
      assert(pos.count<PAWN>(strongSide) == 1);
  
 -    if (file_of(pos.square<PAWN>(strongSide)) >= FILE_E)
 -        sq = flip_file(sq);
 +    if (file_of(pos.square<PAWN>(strongSide)) > pos.max_file() / 2)
-         sq = Square(sq + pos.max_file() - 2 * file_of(sq)); // Mirror SQ_H1 -> SQ_A1
++        sq = flip_file(sq, pos.max_file());
 +
-     return relative_square(strongSide, sq, pos.max_rank());
++    return strongSide == WHITE ? sq : flip_rank(sq, pos.max_rank());
 +  }
  
 -    return strongSide == WHITE ? sq : flip_rank(sq);
 +  // Map the square to an 8x8 board
 +  Square map_to_standard_board(const Position& pos, Square s) {
 +    File f = file_of(s) > pos.max_file() / 2 ? File(FILE_H - pos.max_file() + file_of(s)) : file_of(s);
 +    Rank r = rank_of(s) > pos.max_rank() / 2 ? Rank(RANK_8 - pos.max_rank() + rank_of(s)) : rank_of(s);
 +    return Square(r * 8 + f);
    }
  
  } // namespace

diff --cc src/psqt.cpp
index 9c44cd1,f6f5933..7797261
--- 1/src/psqt.cpp
--- 2/src/psqt.cpp
+++ b/src/psqt.cpp
@@@ -106,94 -103,19 +106,94 @@@ Score psq[PIECE_NB][SQUARE_NB + 1]
  // init() initializes piece-square tables: the white halves of the tables are
  // copied from Bonus[] adding the piece value, then the black halves of the
  // tables are initialized by flipping and changing the sign of the white scores.
 -void init() {
 +void init(const Variant* v) {
  
 -  for (Piece pc = W_PAWN; pc <= W_KING; ++pc)
 +  PieceType strongestPiece = NO_PIECE_TYPE;
 +  for (PieceType pt : v->pieceTypes)
 +      if (PieceValue[MG][pt] > PieceValue[MG][strongestPiece])
 +          strongestPiece = pt;
 +
 +  Value maxPromotion = VALUE_ZERO;
 +  for (PieceType pt : v->promotionPieceTypes)
 +      maxPromotion = std::max(maxPromotion, PieceValue[EG][pt]);
 +
 +  for (PieceType pt = PAWN; pt <= KING; ++pt)
    {
 +      Piece pc = make_piece(WHITE, pt);
 +
        Score score = make_score(PieceValue[MG][pc], PieceValue[EG][pc]);
  
 -      for (Square s = SQ_A1; s <= SQ_H8; ++s)
 +      // Consider promotion types in pawn score
 +      if (pt == PAWN)
 +          score -= make_score(0, (QueenValueEg - maxPromotion) / 100);
 +
 +      // Scale slider piece values with board size
 +      const PieceInfo* pi = pieceMap.find(pt)->second;
 +      bool isSlider = pi->sliderQuiet.size() || pi->sliderCapture.size() || pi->hopperQuiet.size() || pi->hopperCapture.size();
 +      bool isPawn = !isSlider && pi->stepsQuiet.size() && !std::any_of(pi->stepsQuiet.begin(), pi->stepsQuiet.end(), [](Direction d) { return d < SOUTH / 2; });
 +      bool isSlowLeaper = !isSlider && !std::any_of(pi->stepsQuiet.begin(), pi->stepsQuiet.end(), [](Direction d) { return dist(d) > 1; });
 +
 +      if (isSlider)
 +      {
 +          constexpr int lc = 5;
 +          constexpr int rm = 5;
 +          constexpr int r0 = rm + RANK_8;
 +          int r1 = rm + (v->maxRank + v->maxFile) / 2;
 +          int leaper = pi->stepsQuiet.size() + pi->stepsCapture.size();
 +          int slider = pi->sliderQuiet.size() + pi->sliderCapture.size() + pi->hopperQuiet.size() + pi->hopperCapture.size();
 +          score = make_score(mg_value(score) * (lc * leaper + r1 * slider) / (lc * leaper + r0 * slider),
 +                             eg_value(score) * (lc * leaper + r1 * slider) / (lc * leaper + r0 * slider));
 +      }
 +
 +      // Increase leapers' value in makpong
 +      if (v->makpongRule)
 +      {
 +          if (std::any_of(pi->stepsCapture.begin(), pi->stepsCapture.end(), [](Direction d) { return dist(d) > 1; })
 +                  && !pi->lameLeaper)
 +              score = make_score(mg_value(score) * 4200 / (3500 + mg_value(score)),
 +                                 eg_value(score) * 4700 / (3500 + mg_value(score)));
 +      }
 +
 +      // For drop variants, halve the piece values
 +      if (v->capturesToHand)
 +          score = make_score(mg_value(score) * 3500 / (7000 + mg_value(score)),
 +                             eg_value(score) * 3500 / (7000 + eg_value(score)));
 +      else if (!v->checking)
 +          score = make_score(mg_value(score) * 2000 / (3500 + mg_value(score)),
 +                             eg_value(score) * 2200 / (3500 + eg_value(score)));
 +      else if (v->twoBoards)
 +          score = make_score(mg_value(score) * 7000 / (7000 + mg_value(score)),
 +                             eg_value(score) * 7000 / (7000 + eg_value(score)));
 +      else if (v->checkCounting)
 +          score = make_score(mg_value(score) * (40000 + mg_value(score)) / 41000,
 +                             eg_value(score) * (30000 + eg_value(score)) / 31000);
 +      else if (pt == strongestPiece)
 +              score += make_score(std::max(QueenValueMg - PieceValue[MG][pt], VALUE_ZERO) / 20,
 +                                  std::max(QueenValueEg - PieceValue[EG][pt], VALUE_ZERO) / 20);
 +
 +      // For antichess variants, use negative piece values
 +      if (   v->extinctionValue == VALUE_MATE
 +          && v->extinctionPieceTypes.find(ALL_PIECES) != v->extinctionPieceTypes.end())
 +          score = -make_score(mg_value(score) / 8, eg_value(score) / 8 / (1 + !pi->sliderCapture.size()));
 +
 +      for (Square s = SQ_A1; s <= SQ_MAX; ++s)
        {
 -          File f = map_to_queenside(file_of(s));
 -          psq[ pc][ s] = score + (type_of(pc) == PAWN ? PBonus[rank_of(s)][file_of(s)]
 -                                                      : Bonus[pc][rank_of(s)][f]);
 -          psq[~pc][flip_rank(s)] = -psq[pc][s];
 +          File f = std::max(std::min(file_of(s), File(v->maxFile - file_of(s))), FILE_A);
 +          Rank r = rank_of(s);
 +          psq[ pc][ s] = score + (  pt == PAWN  ? PBonus[std::min(r, RANK_8)][std::min(file_of(s), FILE_H)]
 +                                  : pt == KING  ? KingBonus[std::min(r, RANK_8)][std::min(f, FILE_D)] * (1 + v->capturesToHand)
 +                                  : pt <= QUEEN ? Bonus[pc][std::min(r, RANK_8)][std::min(f, FILE_D)]
 +                                  : pt == HORSE ? Bonus[KNIGHT][std::min(r, RANK_8)][std::min(f, FILE_D)]
 +                                  : isSlider    ? make_score(5, 5) * (2 * f + std::max(std::min(r, Rank(v->maxRank - r)), RANK_1) - v->maxFile - 1)
 +                                  : isPawn      ? make_score(5, 5) * (2 * f - v->maxFile)
 +                                                : make_score(10, 10) * (1 + isSlowLeaper) * (f + std::max(std::min(r, Rank(v->maxRank - r)), RANK_1) - v->maxFile / 2));
 +          if (pt == SOLDIER && r < v->soldierPromotionRank)
 +              psq[pc][s] -= score * (v->soldierPromotionRank - r) / (4 + f);
-           psq[~pc][rank_of(s) <= v->maxRank ? relative_square(BLACK, s, v->maxRank) : s] = -psq[pc][s];
++          psq[~pc][rank_of(s) <= v->maxRank ? flip_rank(s, v->maxRank) : s] = -psq[pc][s];
        }
 +      // pieces in pocket
 +      psq[ pc][SQ_NONE] = score + make_score(45, 10);
 +      psq[~pc][SQ_NONE] = -psq[pc][SQ_NONE];
    }
  }
  

diff --cc src/syzygy/tbprobe.cpp
index 90c53aa,6f36945..c20beb1
--- 1/src/syzygy/tbprobe.cpp
--- 2/src/syzygy/tbprobe.cpp
+++ b/src/syzygy/tbprobe.cpp
@@@ -66,11 -66,9 +66,10 @@@ enum TBType { KEY, WDL, DTZ }; // Used 
  enum TBFlag { STM = 1, Mapped = 2, WinPlies = 4, LossPlies = 8, Wide = 16, SingleValue = 128 };
  
  inline WDLScore operator-(WDLScore d) { return WDLScore(-int(d)); }
- inline Square operator^=(Square& s, int i) { return s = Square(int(s) ^ i); }
  inline Square operator^(Square s, int i) { return Square(int(s) ^ i); }
  
 -const std::string PieceToChar = " PNBRQK  pnbrqk";
 +const std::string PieceToChar(  " PNBRQ" + std::string(KING - QUEEN - 1, ' ') + "K" + std::string(PIECE_TYPE_NB - KING - 1, ' ')
 +                              + " pnbrq" + std::string(KING - QUEEN - 1, ' ') + "k" + std::string(PIECE_TYPE_NB - KING - 1, ' '));
  
  int MapPawns[SQUARE_NB];
  int MapB1H1H7[SQUARE_NB];

diff --cc src/types.h
index 3d8dd05,d4937fd..6b52fc0
--- 1/src/types.h
--- 2/src/types.h
+++ b/src/types.h
@@@ -647,12 -358,12 +647,12 @@@ constexpr Color operator~(Color c) 
    return Color(c ^ BLACK); // Toggle color
  }
  
- constexpr Square operator~(Square s) {
- #ifdef LARGEBOARDS
-   return Square(s - FILE_NB * (s / FILE_NB * 2 - RANK_MAX)); // Vertical flip SQ_A1 -> SQ_A10
- #else
-   return Square(s ^ SQ_A8); // Vertical flip SQ_A1 -> SQ_A8
- #endif
 -constexpr Square flip_rank(Square s) {
 -  return Square(s ^ SQ_A8);
++constexpr Square flip_rank(Square s, Rank maxRank = RANK_8) {
++  return Square(s + NORTH * (maxRank - 2 * (s / NORTH)));
+ }
+ 
 -constexpr Square flip_file(Square s) {
 -  return Square(s ^ SQ_H1);
++constexpr Square flip_file(Square s, File maxFile = FILE_H) {
++  return Square(s + maxFile - 2 * (s % NORTH));
  }
  
  constexpr Piece operator~(Piece pc) {