Correctly track down pv even in fail-high case

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 54839f536b7ad9452c5f7a93c53c51338c36e6f1..5445256f3a85d0a0537f985c987674729a995c86 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1125,6 +1125,8 @@ moves_loop: // When in check, search starts from here
                   break;
               }
           }
+          else if (PvNode && !rootNode && value == alpha)
+              update_pv(ss->pv, move, (ss+1)->pv);
       }
 
       if (move != bestMove)