Update 7 eval and optimism params

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index e322a1c99aa5ca094c05ec186ce54dcfe55f862b..8ce9c56e42d0849e2caf9b2528d463faf524fe21 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -353,7 +353,7 @@ void Thread::search() {
           beta  = std::min(prev + delta, VALUE_INFINITE);
 
           // Adjust optimism based on root move's previousScore
-          int opt = 120 * prev / (std::abs(prev) + 161);
+          int opt = 102 * prev / (std::abs(prev) + 147);
           optimism[ us] = Value(opt);
           optimism[~us] = -optimism[us];
 
@@ -1169,6 +1169,9 @@ moves_loop: // When in check, search starts here
       if ((ss+1)->cutoffCnt > 3)
           r++;
 
+      else if (move == ttMove)
+          r--;
+
       ss->statScore =  2 * thisThread->mainHistory[us][from_to(move)]
                      + (*contHist[0])[movedPiece][to_sq(move)]
                      + (*contHist[1])[movedPiece][to_sq(move)]