From a30ee34ef6de2ed1374ca9e8650c8bb3877b67a5 Mon Sep 17 00:00:00 2001
From: Michael Whiteley <protonspring@gmail.com>
Date: Wed, 3 Jun 2026 16:09:32 -0600
Subject: [PATCH] Faster is_noisy.

bench 3634130
---
 src/types/moves.rs | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/src/types/moves.rs b/src/types/moves.rs
index 5d66d7f5a..f2e8098a5 100644
--- a/src/types/moves.rs
+++ b/src/types/moves.rs
@@ -65,17 +65,10 @@ impl Move {
         self.is_present() && !self.is_noisy()
     }
 
+    // Sneaky bit-twidling.  If we just look at the last 3 bits (& 7), anything
+    // greater than Castling is a queen push promotion or a capture.
     pub const fn is_noisy(self) -> bool {
-        matches!(
-            self.kind(),
-            MoveKind::Capture
-                | MoveKind::EnPassant
-                | MoveKind::PromotionQ
-                | MoveKind::PromotionCaptureN
-                | MoveKind::PromotionCaptureB
-                | MoveKind::PromotionCaptureR
-                | MoveKind::PromotionCaptureQ
-        )
+        (self.kind() as u8 & 7) > MoveKind::Castling as u8
     }
 
     pub const fn is_special(self) -> bool {