Elo Worth in King Danger

[stockfish] / src / evaluate.cpp

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 030d10175790190033a41be8ba67b35f2c0fe176..4ade46fa4a1d3d18631fd5db8a6496bd2582951b 100644 (file)
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -582,18 +582,18 @@ namespace {
     int kingFlankAttack  = popcount(b1) + popcount(b2);
     int kingFlankDefense = popcount(b3);
 
-    kingDanger +=        kingAttackersCount[Them] * kingAttackersWeight[Them]
-                 + 185 * popcount(kingRing[Us] & weak)
-                 + 148 * popcount(unsafeChecks)
-                 +  98 * popcount(pos.blockers_for_king(Us))
-                 +  69 * kingAttacksCount[Them]
-                 +   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
-                 -   4 * kingFlankDefense
-                 +  37;
+    kingDanger +=        kingAttackersCount[Them] * kingAttackersWeight[Them] // (~10 Elo)
+                 + 185 * popcount(kingRing[Us] & weak)                        // (~15 Elo)
+                 + 148 * popcount(unsafeChecks)                               // (~4 Elo)
+                 +  98 * popcount(pos.blockers_for_king(Us))                  // (~2 Elo)
+                 +  69 * kingAttacksCount[Them]                               // (~0.5 Elo)
+                 +   3 * kingFlankAttack * kingFlankAttack / 8                // (~0.5 Elo)
+                 +       mg_value(mobility[Them] - mobility[Us])              // (~0.5 Elo)
+                 - 873 * !pos.count<QUEEN>(Them)                              // (~24 Elo)
+                 - 100 * bool(attackedBy[Us][KNIGHT] & attackedBy[Us][KING])  // (~5 Elo)
+                 -   6 * mg_value(score) / 8                                  // (~8 Elo)
+                 -   4 * kingFlankDefense                                     // (~5 Elo)
+                 +  37;                                                       // (~0.5 Elo)
 
     // Transform the kingDanger units into a Score, and subtract it from the evaluation
     if (kingDanger > 100)