Simplify SEE verfication logic

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 10844746ccc88de74362ddf30d65c4dbb5896280..653cbf339a6343625108bd462d7112035784fb6b 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -996,9 +996,7 @@ moves_loop: // When in check, search starts here
               // SEE based pruning (~11 Elo)
               if (!pos.see_ge(move, occupied, Value(-205) * depth))
               {
-                  if (depth < 2 - capture)
-                      continue;
-                  // Don't prune the move if opp. King/Queen/Rook gets a discovered attack during or after the exchanges
+                  // Don't prune the move if opponent King/Queen/Rook gets a discovered attack during or after the exchanges
                   Bitboard leftEnemies = pos.pieces(~us, KING, QUEEN, ROOK);
                   Bitboard attacks = 0;
                   occupied |= to_sq(move);
@@ -1006,7 +1004,7 @@ moves_loop: // When in check, search starts here
                   {
                       Square sq = pop_lsb(leftEnemies);
                       attacks = pos.attackers_to(sq, occupied) & pos.pieces(us) & occupied;
-                      // Exclude Queen/Rook(s) which were already threatened before SEE (opp King can't be in check when it's our turn)
+                      // Exclude Queen/Rook(s) which were already threatened before SEE (opponent King can't be in check when it's our turn)
                       if (attacks && sq != pos.square<KING>(~us) && (pos.attackers_to(sq, pos.pieces()) & pos.pieces(us)))
                           attacks = 0;
                   }