From 0620ce11a74ae000a5d24ca8dae31687fc0a7258 Mon Sep 17 00:00:00 2001
From: Terje <tkirstihagen@gmail.com>
Date: Mon, 25 Sep 2023 23:43:30 +0200
Subject: [PATCH] Bench: 20247146

---
 src/evaluate.c    | 12 ++++++++++++
 src/psqt.c        |  2 +-
 src/tuner/tuner.c |  4 ++++
 src/tuner/tuner.h |  3 ++-
 4 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/evaluate.c b/src/evaluate.c
index af1d34f4..797d092c 100644
--- a/src/evaluate.c
+++ b/src/evaluate.c
@@ -63,6 +63,7 @@ const int PushThreat   = S( 25,  6);
 const int PawnOpen     = S(-14,-19);
 const int BishopPair   = S( 33,110);
 const int KingAtkPawn  = S(-16, 45);
+const int KingNoAdv    = S(  3,-34);
 const int OpenForward  = S( 28, 31);
 const int SemiForward  = S( 17, 15);
 const int NBBehindPawn = S(  9, 32);
@@ -316,6 +317,8 @@ INLINE int EvalPiece(const Position *pos, EvalInfo *ei, const Color color, const
 // Evaluates kings
 INLINE int EvalKings(const Position *pos, EvalInfo *ei, const Color color) {
 
+    const Direction up = color == WHITE ? NORTH : SOUTH;
+
     int eval = 0;
 
     Square kingSq = kingSq(color);
@@ -334,6 +337,15 @@ INLINE int EvalKings(const Position *pos, EvalInfo *ei, const Color color) {
         TraceIncr(KingAtkPawn);
     }
 
+    if (RelativeRank(color, RankOf(kingSq)) == RANK_1) {
+        Bitboard forward = AttackBB(KING, kingSq, 0) & RankBB[RankOf(kingSq + up)];
+
+        if (!(forward & ~(colorBB(color) | ei->attackedBy[!color][ALL]))) {
+            eval += KingNoAdv;
+            TraceIncr(KingNoAdv);
+        }
+    }
+
     // King safety
     ei->attackPower[!color] += (count - 3) * 8;
 
diff --git a/src/psqt.c b/src/psqt.c
index 158093c7..02911911 100644
--- a/src/psqt.c
+++ b/src/psqt.c
@@ -81,7 +81,7 @@ const int PieceSqValue[6][64] = {
       S( 25, 31), S(114, 68), S(119,107), S( 36,146), S( 79,134), S(114,108), S(111, 74), S(-41, 68),
       S( 32, 25), S(117, 55), S( 86, 83), S( 63,103), S( 81, 99), S( 69, 90), S( 86, 67), S( -3, 52),
       S( 85, 25), S( 84, 50), S( 72, 66), S( 19, 86), S( 31, 86), S( 47, 75), S( 84, 50), S( 60, 25),
-      S( 37,-41), S( 89, -1), S( 64, 30), S(-39, 43), S( 33, 17), S(-18, 50), S( 66,  3), S( 36,-41) },
+      S( 37,-40), S( 97, -8), S( 71, 25), S(-40, 45), S( 38, 16), S( -8, 46), S( 72, -1), S( 34,-35) },
 };
 
 // Initialize the piece square tables with piece values included
diff --git a/src/tuner/tuner.c b/src/tuner/tuner.c
index dd974906..a320df6b 100644
--- a/src/tuner/tuner.c
+++ b/src/tuner/tuner.c
@@ -51,6 +51,7 @@ extern const int PushThreat;
 extern const int PawnOpen;
 extern const int BishopPair;
 extern const int KingAtkPawn;
+extern const int KingNoAdv;
 extern const int OpenForward;
 extern const int SemiForward;
 extern const int NBBehindPawn;
@@ -178,6 +179,7 @@ static void InitBaseParams(TVector tparams) {
     InitBaseSingle(PawnOpen);
     InitBaseSingle(BishopPair);
     InitBaseSingle(KingAtkPawn);
+    InitBaseSingle(KingNoAdv);
     InitBaseSingle(OpenForward);
     InitBaseSingle(SemiForward);
     InitBaseSingle(NBBehindPawn);
@@ -250,6 +252,7 @@ static void PrintParameters(TVector updates, TVector base) {
     PrintSingle(PawnOpen, "    ");
     PrintSingle(BishopPair, "  ");
     PrintSingle(KingAtkPawn, " ");
+    PrintSingle(KingNoAdv, "   ");
     PrintSingle(OpenForward, " ");
     PrintSingle(SemiForward, " ");
     PrintSingle(NBBehindPawn, "");
@@ -317,6 +320,7 @@ static void InitCoefficients(TCoeffs coeffs) {
     InitCoeffSingle(PawnOpen);
     InitCoeffSingle(BishopPair);
     InitCoeffSingle(KingAtkPawn);
+    InitCoeffSingle(KingNoAdv);
     InitCoeffSingle(OpenForward);
     InitCoeffSingle(SemiForward);
     InitCoeffSingle(NBBehindPawn);
diff --git a/src/tuner/tuner.h b/src/tuner/tuner.h
index ba1e34ae..b70f417c 100644
--- a/src/tuner/tuner.h
+++ b/src/tuner/tuner.h
@@ -49,7 +49,7 @@
 // #define NPOSITIONS   (14669229) // Total FENS in the book
 
 
-#define NTERMS       (     552) // Number of terms being tuned
+#define NTERMS       (     553) // Number of terms being tuned
 #define MAXEPOCHS    (   10000) // Max number of epochs allowed
 #define REPORTING    (      50) // How often to print the new parameters
 #define NPARTITIONS  (      64) // Total thread partitions
@@ -80,6 +80,7 @@ typedef struct EvalTrace {
     int PawnOpen[COLOR_NB];
     int BishopPair[COLOR_NB];
     int KingAtkPawn[COLOR_NB];
+    int KingNoAdv[COLOR_NB];
     int OpenForward[COLOR_NB];
     int SemiForward[COLOR_NB];
     int NBBehindPawn[COLOR_NB];