X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fsearch.cpp;h=ec443bef92d090b9b92176a4b15fccdd0ababd7d;hb=cf5d683408a2ef8a1c80be9bf7d6790a38b16277;hp=2678f7d5d9bae66685e3a108ec1868bdfde5d014;hpb=4a0db9ea3c34d7663a039c40ce810ba9cb743cca;p=stockfish

diff --git a/src/search.cpp b/src/search.cpp
index 2678f7d5..ec443bef 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -2,7 +2,7 @@
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
   Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
-  Copyright (C) 2015-2018 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
+  Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -187,6 +187,7 @@ void Search::clear() {
   Time.availableNodes = 0;
   TT.clear();
   Threads.clear();
+  Tablebases::init(Options["SyzygyPath"]); // Free up mapped files
 }
 
 
@@ -368,7 +369,6 @@ void Thread::search() {
 
       size_t pvFirst = 0;
       pvLast = 0;
-      Depth adjustedDepth = rootDepth;
 
       // MultiPV loop. We perform a full root search for each PV line
       for (pvIdx = 0; pvIdx < multiPV && !Threads.stop; ++pvIdx)
@@ -405,7 +405,7 @@ void Thread::search() {
           int failedHighCnt = 0;
           while (true)
           {
-        	  adjustedDepth = std::max(ONE_PLY, rootDepth - failedHighCnt * ONE_PLY);
+              Depth adjustedDepth = std::max(ONE_PLY, rootDepth - failedHighCnt * ONE_PLY);
               bestValue = ::search<PV>(rootPos, ss, alpha, beta, adjustedDepth, false);
 
               // Bring the best move to the front. It is critical that sorting
@@ -428,7 +428,7 @@ void Thread::search() {
                   && multiPV == 1
                   && (bestValue <= alpha || bestValue >= beta)
                   && Time.elapsed() > 3000)
-                  sync_cout << UCI::pv(rootPos, adjustedDepth, alpha, beta) << sync_endl;
+                  sync_cout << UCI::pv(rootPos, rootDepth, alpha, beta) << sync_endl;
 
               // In case of failing low/high increase aspiration window and
               // re-search, otherwise exit the loop.
@@ -463,15 +463,15 @@ void Thread::search() {
 
           if (    mainThread
               && (Threads.stop || pvIdx + 1 == multiPV || Time.elapsed() > 3000))
-              sync_cout << UCI::pv(rootPos, adjustedDepth, alpha, beta) << sync_endl;
+              sync_cout << UCI::pv(rootPos, rootDepth, alpha, beta) << sync_endl;
       }
 
       if (!Threads.stop)
-          completedDepth = adjustedDepth;
+          completedDepth = rootDepth;
 
       if (rootMoves[0].pv[0] != lastBestMove) {
          lastBestMove = rootMoves[0].pv[0];
-         lastBestMoveDepth = adjustedDepth;
+         lastBestMoveDepth = rootDepth;
       }
 
       // Have we found a "mate in x"?
@@ -944,6 +944,10 @@ moves_loop: // When in check, search starts from here
                &&  pos.see_ge(move))
           extension = ONE_PLY;
 
+      else if (   pos.can_castle(us) // Extension for king moves that change castling rights
+               && type_of(movedPiece) == KING)
+          extension = ONE_PLY;
+
       // Calculate new depth for this move
       newDepth = depth - ONE_PLY + extension;