stuff

src/config.rs

@@ -20,4 +20,4 @@ pub const INFO: Info = Info {
 };
 
 // FIXME: this needs to be configurable via UCI
-pub const DEPTH: u8 = 8;
+pub const DEPTH: u8 = 7;

src/eval.rs

@@ -106,7 +106,12 @@ fn evaluate_piece_square(board: ChessBoard, square: Square, playing_as: Color) -
     (mg_value, eg_value, gamephase)
 }
 
-fn static_board_eval(board: ChessBoard, playing_as: Color, move_history: Vec<ChessBoard>) -> f64 {
+fn static_board_eval(
+    board: ChessBoard,
+    playing_as: Color,
+    move_history: Vec<ChessBoard>,
+    last_move: ChessMove,
+) -> f64 {
     // basic material counting + midgame or endgame determination
     let mut our_mg_value: f64 = 0.0;
     let mut our_eg_value: f64 = 0.0;
@@ -160,21 +165,17 @@ fn static_board_eval(board: ChessBoard, playing_as: Color, move_history: Vec<Che
             }
         });
 
-    /* // deprioritize king movement
-    if board.piece_on(mov.get_source()).unwrap_or(Piece::Pawn) == Piece::King && !are_we_in_check {
-        current_eval -= 12.5;
+    // ripoff quiescence search except way worse (makes eval go down if opossing side can make any captures on the next move)
+    let iter = MoveGen::new_legal(&board);
+    if board.side_to_move() != playing_as {
+        for mov in iter {
+            if let Some(_) = board.piece_on(mov.get_dest()) {
+                current_eval -= 10.0;
+                break;
+            }
+        }
     }
 
-    // incentivize capturing if material value of capturer is lower than material value of captured
-    // FIXME: this should take into account whether a piece is protected at all (and if so let pieces be captured by ones of equal and above importance)
-    if let (Some(captured_piece), Some(capturing_piece)) = (
-        old_board.piece_on(mov.get_dest()),
-        old_board.piece_on(mov.get_source()),
-    ) {
-        current_eval +=
-            (get_piece_value(Some(captured_piece)) - get_piece_value(Some(capturing_piece)))
-    } */
-
     current_eval
 }
 
@@ -182,6 +183,7 @@ fn static_board_eval(board: ChessBoard, playing_as: Color, move_history: Vec<Che
 pub struct Board {
     pub current_board: ChessBoard,
     pub board_history: Vec<ChessBoard>,
+    pub last_move: ChessMove,
 }
 
 pub struct Game;
@@ -211,6 +213,7 @@ impl minimax::Game for Game {
         Some(Board {
             current_board: b.current_board.make_move_new(m),
             board_history: new_board_history,
+            last_move: m,
         })
     }
 
@@ -230,6 +233,7 @@ impl minimax::Evaluator for Evaluator {
             b.current_board,
             b.current_board.side_to_move(),
             b.board_history.clone(),
+            b.last_move.clone(),
         ) as i16
     }
 }

src/main.rs

@@ -105,6 +105,7 @@ fn main() {
                         .choose_move(&EvalBoard {
                             current_board: board,
                             board_history: move_history.clone(),
+                            last_move: Default::default(),
                         })
                         .unwrap();