fix: correctly calculate king tropism

1 files changed, 3 insertions, 3 deletions

diff --git a/src/board/engine.rs b/src/board/engine.rs
index ed533df..65851cf 100644
--- a/src/board/engine.rs
+++ b/src/board/engine.rs
@@ -153,7 +153,7 @@ impl Board {
     }
 
     /// Returns the weighted sum of distances from attacking pieces to a king
-    /// The higher this value, the more likely the king is to be in danger
+    /// The higher this value, the safer is the king
     pub fn king_tropism(&self, color: Color) -> f32 {
         let mut result = 0.0;
 
@@ -169,7 +169,7 @@ impl Board {
                         (king_square.rank() as f32 - square.rank() as f32).abs() +
                         (king_square.file() as f32 - square.file() as f32).abs();
 
-                    result += distance * PieceType::from(piece_type).static_eval();
+                    result += distance / PieceType::from(piece_type).static_eval();
                 }
             }
         }
@@ -195,7 +195,7 @@ impl Board {
 
         let king_tropism_penalty = self.king_tropism(color) - self.king_tropism(opponent_color);
 
-        material_advantage + 0.1 * mobility_advantage - 0.5 * pawn_structure_penalty - king_tropism_penalty * opponent_material / 3000.0
+        material_advantage + 0.1 * mobility_advantage - 0.5 * pawn_structure_penalty + king_tropism_penalty * opponent_material / 100.0
     }
 
     /// Evaluate move for move ordering, prioritizing efficient captures