Increase search margins by 5%

src/search/alphabeta.rs

@@ -4,7 +4,7 @@ use crate::{
     types::{Move, Score, MAX_PLY},
 };
 
-const DEEPER_SEARCH_MARGIN: i32 = 80;
+const DEEPER_SEARCH_MARGIN: i32 = 84;
 const IIR_DEPTH: i32 = 4;
 
 impl super::SearchThread<'_> {
@@ -32,7 +32,7 @@ impl super::SearchThread<'_> {
                 return alpha;
             }
         }
-    
+
         // Prevent overflows
         if self.board.ply >= MAX_PLY - 1 {
             return self.board.evaluate();

src/search/quiescence.rs

@@ -5,7 +5,7 @@ use crate::{
     types::{Move, Piece, Score, MAX_PLY},
 };
 
-const PIECE_VALUES: [i32; 5] = [400, 750, 800, 1200, 1900];
+const PIECE_VALUES: [i32; 5] = [420, 787, 840, 1260, 1995];
 
 impl super::SearchThread<'_> {
     /// Performs a search until the position becomes stable enough for static evaluation.

src/search/selectivity.rs

@@ -1,15 +1,15 @@
 use crate::types::{Move, Score};
 
-const RFP_MARGIN: i32 = 75;
+const RFP_MARGIN: i32 = 78;
 const RFP_DEPTH: i32 = 7;
 
 const NMP_DEPTH: i32 = 3;
 const NMP_REDUCTION: i32 = 3;
 const NMP_DIVISOR: i32 = 4;
 
 const RAZORING_DEPTH: i32 = 4;
-const RAZORING_MARGIN: i32 = 220;
-const RAZORING_FIXED_MARGIN: i32 = 135;
+const RAZORING_MARGIN: i32 = 231;
+const RAZORING_FIXED_MARGIN: i32 = 141;
 
 const LMR_MOVES_PLAYED: i32 = 3;
 const LMR_DEPTH: i32 = 3;
@@ -21,8 +21,8 @@ const QLMP_DEPTH: i32 = 4;
 const QLMP_QUIETS_PLAYED: i32 = 3;
 
 const FUTILITY_DEPTH: i32 = 5;
-const FUTILITY_MARGIN: i32 = 130;
-const FUTILITY_FIXED_MARGIN: i32 = 45;
+const FUTILITY_MARGIN: i32 = 136;
+const FUTILITY_FIXED_MARGIN: i32 = 47;
 
 impl super::SearchThread<'_> {
     /// If the static evaluation of the position is significantly higher than beta