Add impl for KnightAttacksQueenBonus

src/Lynx/Attacks.cs

@@ -30,7 +30,15 @@ public static class Attacks
     /// [2 (B|W), 64 (Squares)]
     /// </summary>
     public static BitBoard[][] PawnAttacks { get; }
+
+    /// <summary>
+    /// [64]
+    /// </summary>
     public static BitBoard[] KnightAttacks { get; }
+
+    /// <summary>
+    /// [64]
+    /// </summary>
     public static BitBoard[] KingAttacks { get; }
 
     static Attacks()

src/Lynx/Generated/Lynx.Generator/Lynx.Generator.GeneratedPackGenerator/EvaluationParams.g.cs

@@ -47,4 +47,9 @@ static partial class EvaluationParams
     /// </summary>
     public const int PieceAttackedByPawnPenalty = -2162735;
 
+    /// <summary>
+    /// <see cref="Utils.Pack(1, 2)"/>
+    /// </summary>
+    public const int QueenAttackedByKnightBonus = 131073;
+
 }

src/Lynx/Model/Position.cs

@@ -726,12 +726,19 @@ private int KnightAdditionalEvaluation(int squareIndex, int pieceSide, int oppos
 
         var packedBonus = KnightMobilityBonus[attacksCount];
 
+        var knightAttacks = Attacks.KnightAttacks;
+
         // Checks
-        var enemyKingCheckThreats = Attacks.KnightAttacks[oppositeSideKingSquare];
+        var enemyKingCheckThreats = knightAttacks[oppositeSideKingSquare];
         var checks = (attacks & enemyKingCheckThreats).CountBits();
-
         packedBonus += CheckBonus[(int)Piece.N] * checks;
 
+        // Attacks to enemy queens
+        if ((attacks & PieceBitBoards[(int)Piece.q - Utils.PieceOffset(pieceSide)]) != 0)
+        {
+            packedBonus += KnightAttacksQueenBonus;
+        }
+
         return packedBonus;
     }
 

src/Lynx/TunableEvalParameters.cs

@@ -6043,6 +6043,9 @@ public static partial class EvaluationParams
     [GeneratedPack(-47, -33)]
     private static readonly int _PieceAttackedByPawnPenalty;
 
+    [GeneratedPack(1, 2)]
+    private static readonly int _KnightAttacksQueenBonus;
+
 #pragma warning restore IDE0051, IDE0052, CS0169 // Remove unread private members
 
     public static readonly TaperedEvaluationTermByRank PawnPhalanxBonus =