Minimal thinking time, even if only one rootMove.

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 1e133447d381b547f97d9ea93ab7aa7321d862f7..35110538170c5cb03732a955b1cbe4b616eb7dc2 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -556,9 +556,11 @@ void Thread::search() {
           }
           double bestMoveInstability = 1 + totBestMoveChanges / Threads.size();
 
-          // Stop the search if we have only one legal move, or if available time elapsed
-          if (   rootMoves.size() == 1
-              || Time.elapsed() > Time.optimum() * fallingEval * reduction * bestMoveInstability)
+          double totalTime = rootMoves.size() == 1 ? 0 :
+                             Time.optimum() * fallingEval * reduction * bestMoveInstability;
+
+          // Stop the search if we have exceeded the totalTime, at least 1ms search.
+          if (Time.elapsed() > totalTime)
           {
               // If we are allowed to ponder do not stop the search now but
               // keep pondering until the GUI sends "ponderhit" or "stop".
@@ -569,7 +571,7 @@ void Thread::search() {
           }
           else if (   Threads.increaseDepth
                    && !mainThread->ponder
-                   && Time.elapsed() > Time.optimum() * fallingEval * reduction * bestMoveInstability * 0.6)
+                   && Time.elapsed() > totalTime * 0.6)
                    Threads.increaseDepth = false;
           else
                    Threads.increaseDepth = true;