Merge official-stockfish/master

bench: 4755489

diff --cc src/evaluate.cpp
index 9763547,be39f8a..d123f0c
--- 1/src/evaluate.cpp
--- 2/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@@ -179,9 -167,8 +179,9 @@@ namespace 
      template<Color Us> Score threats() const;
      template<Color Us> Score passed() const;
      template<Color Us> Score space() const;
 +    template<Color Us> Score variant() const;
      ScaleFactor scale_factor(Value eg) const;
-     Score initiative(Score score) const;
+     Score initiative(Score score, Score materialScore) const;
  
      const Position& pos;
      Material::Entry* me;
@@@ -1000,21 -696,13 +1000,18 @@@
    // known attacking/defending status of the players.
  
    template<Tracing T>
-   Score Evaluation<T>::initiative(Score score) const {
- 
-     Value mg = mg_value(score);
-     Value eg = eg_value(score);
+   Score Evaluation<T>::initiative(Score score, Score materialScore) const {
  
 -    int outflanking =  distance<File>(pos.square<KING>(WHITE), pos.square<KING>(BLACK))
 -                     - distance<Rank>(pos.square<KING>(WHITE), pos.square<KING>(BLACK));
 +    // No initiative bonus for extinction variants
 +    if (pos.extinction_value() != VALUE_NONE || pos.captures_to_hand() || pos.connect_n())
 +      return SCORE_ZERO;
  
 -    bool infiltration =   rank_of(pos.square<KING>(WHITE)) > RANK_4
 -                       || rank_of(pos.square<KING>(BLACK)) < RANK_5;
 +    int outflanking = !pos.count<KING>(WHITE) || !pos.count<KING>(BLACK) ? 0
 +                     :  distance<File>(pos.square<KING>(WHITE), pos.square<KING>(BLACK))
 +                      - distance<Rank>(pos.square<KING>(WHITE), pos.square<KING>(BLACK));
 +
 +    bool infiltration =   (pos.count<KING>(WHITE) && rank_of(pos.square<KING>(WHITE)) > RANK_4)
 +                       || (pos.count<KING>(BLACK) && rank_of(pos.square<KING>(BLACK)) < RANK_5);
  
      bool pawnsOnBothFlanks =   (pos.pieces(PAWN) & QueenSide)
                              && (pos.pieces(PAWN) & KingSide);
@@@ -1104,9 -791,12 +1106,12 @@@
  
      // Early exit if score is high
      Value v = (mg_value(score) + eg_value(score)) / 2;
 -    if (abs(v) > LazyThreshold + pos.non_pawn_material() / 64)
 +    if (abs(v) > LazyThreshold + pos.non_pawn_material() / 64 && Options["UCI_Variant"] == "chess")
         return pos.side_to_move() == WHITE ? v : -v;
  
+     // Remember this score
+     Score materialScore = score;
+ 
      // Main evaluation begins here
  
      initialize<WHITE>();
@@@ -1128,10 -813,9 +1133,10 @@@
      score +=  king<   WHITE>() - king<   BLACK>()
              + threats<WHITE>() - threats<BLACK>()
              + passed< WHITE>() - passed< BLACK>()
 -            + space<  WHITE>() - space<  BLACK>();
 +            + space<  WHITE>() - space<  BLACK>()
 +            + variant<WHITE>() - variant<BLACK>();
  
-     score += initiative(score);
+     score += initiative(score, materialScore);
  
      // Interpolate between a middlegame and a (scaled by 'sf') endgame score
      ScaleFactor sf = scale_factor(eg_value(score));

diff --cc src/search.cpp
index a781aad,1490a26..14e53d6
--- 1/src/search.cpp
--- 2/src/search.cpp
+++ b/src/search.cpp
@@@ -886,13 -825,9 +886,13 @@@ namespace 
          &&  eval <= alpha - RazorMargin)
          return qsearch<NT>(pos, ss, alpha, beta);
  
-     improving =  (ss-2)->staticEval == VALUE_NONE ? (ss->staticEval >= (ss-4)->staticEval
-               || (ss-4)->staticEval == VALUE_NONE) : ss->staticEval >= (ss-2)->staticEval;
+     improving =  (ss-2)->staticEval == VALUE_NONE ? (ss->staticEval > (ss-4)->staticEval
+               || (ss-4)->staticEval == VALUE_NONE) : ss->staticEval > (ss-2)->staticEval;
  
 +    // Skip early pruning in case of mandatory capture
 +    if (pos.must_capture() && MoveList<CAPTURES>(pos).size())
 +        goto moves_loop;
 +
      // Step 8. Futility pruning: child node (~50 Elo)
      if (   !PvNode
          &&  depth < 6
@@@ -1102,8 -1027,12 +1102,12 @@@ moves_loop: // When in check, search st
                if (!pos.see_ge(move, Value(-(32 - std::min(lmrDepth, 18)) * lmrDepth * lmrDepth)))
                    continue;
            }
 -          else if (!pos.see_ge(move, Value(-194) * depth)) // (~25 Elo)
 +          else if (!pos.see_ge(move, Value(-194 - 120 * pos.captures_to_hand()) * depth)) // (~25 Elo)
-                   continue;
+           {
+               if (captureOrPromotion && captureCount < 32)
+                   capturesSearched[captureCount++] = move;
+               continue;
+           }
        }
  
        // Step 14. Extensions (~75 Elo)
@@@ -1242,12 -1164,12 +1246,12 @@@
                // hence break make_move(). (~2 Elo)
                else if (    type_of(move) == NORMAL
                         && !pos.see_ge(reverse_move(move)))
-                   r -= 2;
+                   r -= 2 + ttPv;
  
                ss->statScore =  thisThread->mainHistory[us][from_to(move)]
 -                             + (*contHist[0])[movedPiece][to_sq(move)]
 -                             + (*contHist[1])[movedPiece][to_sq(move)]
 -                             + (*contHist[3])[movedPiece][to_sq(move)]
 +                             + (*contHist[0])[history_slot(movedPiece)][to_sq(move)]
 +                             + (*contHist[1])[history_slot(movedPiece)][to_sq(move)]
 +                             + (*contHist[3])[history_slot(movedPiece)][to_sq(move)]
                               - 4926;
  
                // Reset statScore to zero if negative and most stats shows >= 0