Merge pull request #143 from dsekercioglu/ltc-spsa

Ltc spsa
jnlt3 · Aug 4, 2022 · 4c9f1b8 · 4c9f1b8
2 parents 40d6096 + cab65f3
commit 4c9f1b8
Show file tree

Hide file tree

Showing 2 changed files with 18 additions and 23 deletions.
diff --git a/src/bm/bm_runner/ab_runner.rs b/src/bm/bm_runner/ab_runner.rs
@@ -390,13 +390,13 @@ impl AbRunner {
                     if depth == 0 || mv == 0 {
                         0
                     } else {
-                        (2.01 + (depth as f32).ln() * (mv as f32).ln() / 1.79) as u32
+                        (2.03 + (depth as f32).ln() * (mv as f32).ln() / 1.84) as u32
                     }
                 })),
                 lmp_lookup: Arc::new(LookUp2d::new(|depth, improving| {
-                    let mut x = 2.94 + depth as f32 * depth as f32;
+                    let mut x = 3.02 + depth as f32 * depth as f32;
                     if improving == 0 {
-                        x /= 2.07;
+                        x /= 2.03;
                     }
                     x as usize
                 })),

diff --git a/src/bm/bm_search/search.rs b/src/bm/bm_search/search.rs
@@ -40,15 +40,15 @@ impl SearchType for NoNm {
     type Zw = NoNm;
 }
 
-const RFP: i16 = 55;
-const RFP_IMPR: i16 = 48;
+const RFP: i16 = 54;
+const RFP_IMPR: i16 = 49;
 const RFP_DEPTH: u32 = 8;
-const FP: i16 = 63;
-const FP_DEPTH: u32 = 6;
-const SEE_FP: i16 = 89;
-const SEE_FP_DEPTH: u32 = 8;
-const D_EXT: i16 = 18;
-const HP: i32 = 70;
+const FP: i16 = 62;
+const FP_DEPTH: u32 = 5;
+const SEE_FP: i16 = 81;
+const SEE_FP_DEPTH: u32 = 7;
+const D_EXT: i16 = 19;
+const HP: i32 = 71;
 const HP_DEPTH: u32 = 7;
 
 fn threats(board: &Board, threats_of: Color) -> BitBoard {
@@ -147,12 +147,7 @@ const fn hp(depth: u32) -> i32 {
 
 #[inline]
 const fn history_lmr(history: i16) -> i16 {
-    history / 82
-}
-
-#[inline]
-const fn q_see_threshold() -> i16 {
-    200
+    history / 92
 }
 
 pub fn search<Search: SearchType>(
@@ -403,7 +398,7 @@ pub fn search<Search: SearchType>(
                 let s_beta = entry.score() - depth as i16 * 3;
                 local_context.search_stack_mut()[ply as usize].skip_move = Some(make_move);
 
-                let multi_cut = depth >= 4;
+                let multi_cut = depth >= 5;
                 let s_score = if multi_cut {
                     search::<Search::Zw>(
                         pos,
@@ -752,10 +747,10 @@ pub fn q_search(
             SEE beta cutoff: (Koivisto)
             If SEE considerably improves evaluation above beta, we can return beta early
             */
-            if stand_pat + see - q_see_threshold() >= beta {
+            if stand_pat + see - 193 >= beta {
                 return beta;
             }
-            if stand_pat + see + q_see_threshold() <= alpha {
+            if stand_pat + see + 196 <= alpha {
                 continue;
             }
             pos.make_move(make_move);
@@ -851,11 +846,11 @@ pub fn see<const N: usize>(board: &Board, make_move: Move) -> i16 {
 
 fn piece_pts(piece: Piece) -> i16 {
     match piece {
-        Piece::Pawn => 98,
+        Piece::Pawn => 96,
         Piece::Knight => 323,
         Piece::Bishop => 323,
-        Piece::Rook => 559,
-        Piece::Queen => 863,
+        Piece::Rook => 551,
+        Piece::Queen => 864,
         Piece::King => 20000,
     }
 }