From b3b6fa6959332a3b1ed8a8e8efb0c08cd3693c85 Mon Sep 17 00:00:00 2001
From: eug-vs <eugene@eug-vs.xyz>
Date: Sun, 29 Jan 2023 09:01:30 +0300
Subject: test: add weird bishop sacrifice test-case

---
 src/board/engine.rs | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/board/engine.rs b/src/board/engine.rs
index 5f64c39..3977258 100644
--- a/src/board/engine.rs
+++ b/src/board/engine.rs
@@ -197,7 +197,7 @@ 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 / 150.0
+        material_advantage + 0.1 * mobility_advantage - 0.4 * pawn_structure_penalty + king_tropism_penalty * opponent_material / 150.0
     }
 
     /// Evaluate move for move ordering, prioritizing efficient captures
@@ -508,6 +508,19 @@ mod tests {
         );
     }
 
+    #[test]
+    fn weird_bishop_sac() {
+        let fen = String::from("r1b1k1nr/p4pp1/1pp1p3/4n2p/1b1qP3/1B1P3N/PPPBQPPP/RN2K2R w KQkq - 7 10");
+        let mut board = Board::from_FEN(fen);
+
+        let (_, pv) = board.iterative_deepening(5, Duration::from_secs(60));
+        assert_eq!(
+            pv[0],
+            Move { source: Square::C2, target: Square::C3, kind: MoveKind::Quiet },
+            "You should fork this bastard!"
+        );
+    }
+
     mod evaluation {
         use crate::{moves::{Move, MoveKind}, square::Square};
 
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