Better document fail-high condition

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 55d815c4b5530359e4d7dbf1269116cd7497138e..4915b502848f746a211063562724a48a7d54d4dd 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -218,7 +218,7 @@ void Search::think() {
   if (Options["Use Search Log"])
   {
       Log log(Options["Search Log Filename"]);
-      log << "\nSearching: "  << RootPos.to_fen()
+      log << "\nSearching: "  << RootPos.fen()
           << "\ninfinite: "   << Limits.infinite
           << " ponder: "      << Limits.ponder
           << " time: "        << Limits.time[RootColor]
@@ -1003,8 +1003,10 @@ split_point_start: // At split points actual search starts from here
                   alpha = value; // Update alpha here! Always alpha < beta
                   if (SpNode) sp->alpha = value;
               }
-              else // Fail high
+              else
               {
+                  assert(value >= beta); // Fail high
+
                   if (SpNode) sp->cutoff = true;
                   break;
               }