X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=3fb1345a892a9f7937135290fc60146a86ec8e33;hp=ff10ba5d036b33df1aa3a4d56eb9d6bf89a0a092;hb=1b69910865a4add283ba32626acce4e03553a51c;hpb=94b1bbb68be6b0bc3aaf1cb804841a022bcc7007

diff --git a/src/search.cpp b/src/search.cpp
index ff10ba5d..3fb1345a 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -94,9 +94,9 @@ namespace {
   string uci_pv(const Position& pos, int depth, Value alpha, Value beta);
 
   struct Skill {
-    Skill(int l, int rootSize) : level(l),
-                                 candidates(l < 20 ? std::min(4, rootSize) : 0),
-                                 best(MOVE_NONE) {}
+    Skill(int l, size_t rootSize) : level(l),
+                                    candidates(l < 20 ? std::min(4, (int)rootSize) : 0),
+                                    best(MOVE_NONE) {}
    ~Skill() {
       if (candidates) // Swap best PV line with the sub-optimal one
           std::swap(RootMoves[0], *std::find(RootMoves.begin(),
@@ -301,7 +301,7 @@ namespace {
             RootMoves[i].prevScore = RootMoves[i].score;
 
         // MultiPV loop. We perform a full root search for each PV line
-        for (PVIdx = 0; PVIdx < multiPV && PVIdx < RootMoves.size() && !Signals.stop; ++PVIdx)
+        for (PVIdx = 0; PVIdx < std::min(multiPV, RootMoves.size()) && !Signals.stop; ++PVIdx)
         {
             // Reset aspiration window starting size
             if (depth >= 5)
@@ -358,7 +358,7 @@ namespace {
                 else
                     break;
 
-                delta += delta / 2;
+                delta += 3 * delta / 8;
 
                 assert(alpha >= -VALUE_INFINITE && beta <= VALUE_INFINITE);
             }
@@ -366,7 +366,7 @@ namespace {
             // Sort the PV lines searched so far and update the GUI
             std::stable_sort(RootMoves.begin(), RootMoves.begin() + PVIdx + 1);
 
-            if (PVIdx + 1 == multiPV || Time::now() - SearchTime > 3000)
+            if (PVIdx + 1 == std::min(multiPV, RootMoves.size()) || Time::now() - SearchTime > 3000)
                 sync_cout << uci_pv(pos, depth, alpha, beta) << sync_endl;
         }