X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fevaluate.cpp;h=45c5b0a8c83fda889adb15d9a61cfc3a42585a55;hp=8416162d357aa0f0d5740ea9b05f41ee652adb14;hb=fe4fda474fb8b0cb582c8232be602e2d323c87eb;hpb=91cc82aa2566e6b6fa60cf82298250d6e4e2dd46

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 8416162d..45c5b0a8 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -1,7 +1,7 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008-2014 Marco Costalba, Joona Kiiski, Tord Romstad
+  Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -198,7 +198,7 @@ namespace {
 
   // KingDanger[attackUnits] contains the actual king danger weighted
   // scores, indexed by a calculated integer number.
-  Score KingDanger[128];
+  Score KingDanger[512];
 
   // apply_weight() weighs score 's' by weight 'w' trying to prevent overflow
   Score apply_weight(Score s, const Weight& w) {
@@ -476,7 +476,7 @@ namespace {
 
         // Finally, extract the king danger score from the KingDanger[]
         // array and subtract the score from evaluation.
-        score -= KingDanger[std::max(std::min(attackUnits / 4, 99), 0)];
+        score -= KingDanger[std::max(std::min(attackUnits, 399), 0)];
     }
 
     if (Trace)
@@ -534,7 +534,7 @@ namespace {
 
         b = weak & ~ei.attackedBy[Them][ALL_PIECES];
         if (b)
-            score += more_than_one(b) ? Hanging * popcount<Max15>(b) : Hanging;
+            score += Hanging * popcount<Max15>(b);
 
         b = weak & ei.attackedBy[Us][KING];
         if (b)
@@ -891,13 +891,14 @@ namespace Eval {
 
   void init() {
 
-    const double MaxSlope = 30;
+    const double MaxSlope = 7.5;
     const double Peak = 1280;
+    double t = 0.0;
 
-    for (int t = 0, i = 1; i < 100; ++i)
+    for (int i = 1; i < 400; ++i)
     {
-        t = int(std::min(Peak, std::min(0.4 * i * i, t + MaxSlope)));
-        KingDanger[i] = apply_weight(make_score(t, 0), Weights[KingSafety]);
+        t = std::min(Peak, std::min(0.025 * i * i, t + MaxSlope));
+        KingDanger[i] = apply_weight(make_score(int(t), 0), Weights[KingSafety]);
     }
   }