From f9beec5fa56540ee088a9c9e03a6444b4ec26af6 Mon Sep 17 00:00:00 2001
From: zungur <zungur@users.noreply.github.com>
Date: Sun, 14 Jun 2026 09:50:31 +0200
Subject: [PATCH] Reuse computed ray bitboard in update_piece_threats

Reuse the already-computed ray instead of calling ray_pass_bb a second time with identical arguments.

closes https://github.com/official-stockfish/Stockfish/pull/6899

No functional change
---
 src/position.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/position.cpp b/src/position.cpp
index a481286aa..d13f8472e 100644
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -1218,7 +1218,7 @@ void Position::update_piece_threats(Piece               pc,
             const Bitboard discovered = ray & (rAttacks | bAttacks) & occupiedNoK;
 
             assert(!more_than_one(discovered));
-            if (discovered && (ray_pass_bb(sliderSq, s) & noRaysContaining) != noRaysContaining)
+            if (discovered && (ray & noRaysContaining) != noRaysContaining)
             {
                 const Square threatenedSq = lsb(discovered);
                 const Piece  threatenedPc = piece_on(threatenedSq);