Simplify king danger

[stockfish] / src / evaluate.cpp

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 4c876820d060e58862c6e132c6010cb2809585e5..116d5d6616838696d1b6787a85d8fc2f029e7c40 100644 (file)
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -449,13 +449,13 @@ namespace {
                  + 148 * popcount(unsafeChecks)
                  +  98 * popcount(pos.blockers_for_king(Us))
                  +  69 * kingAttacksCount[Them]
-                 +   4 * (kingFlankAttack - kingFlankDefense)
                  +   3 * kingFlankAttack * kingFlankAttack / 8
                  +       mg_value(mobility[Them] - mobility[Us])
                  - 873 * !pos.count<QUEEN>(Them)
                  - 100 * bool(attackedBy[Us][KNIGHT] & attackedBy[Us][KING])
                  -   6 * mg_value(score) / 8
-                 -   7;
+                 -   4 * kingFlankDefense
+                 +  37;
 
     // Transform the kingDanger units into a Score, and subtract it from the evaluation
     if (kingDanger > 100)