From 92fe6b6f4cf081c12d00ad4feba2868af491baf1 Mon Sep 17 00:00:00 2001
From: dav1312 <63931154+dav1312@users.noreply.github.com>
Date: Sat, 6 Jun 2026 10:13:46 +0200
Subject: [PATCH] Simplify RankAttacks initialization

Simplify by replacing the manual ray-casting loop with a single call to the canonical sliding_attack() helper.

closes https://github.com/official-stockfish/Stockfish/pull/6869

No functional change
---
 src/attacks.cpp | 17 +----------------
 1 file changed, 1 insertion(+), 16 deletions(-)

diff --git a/src/attacks.cpp b/src/attacks.cpp
index 6a35dc548..df0f81aa0 100644
--- a/src/attacks.cpp
+++ b/src/attacks.cpp
@@ -80,22 +80,7 @@ constexpr auto RankAttacks = []() {
     std::array<std::array<uint8_t, 256>, FILE_NB> table{};
     for (int file = 0; file < 8; ++file)
         for (int occ = 0; occ < 256; ++occ)
-        {
-            uint8_t attacks = 0;
-            for (int f = file + 1; f <= 7; ++f)
-            {
-                attacks |= uint8_t(1 << f);
-                if (occ & (1 << f))
-                    break;
-            }
-            for (int f = file - 1; f >= 0; --f)
-            {
-                attacks |= uint8_t(1 << f);
-                if (occ & (1 << f))
-                    break;
-            }
-            table[file][occ] = attacks;
-        }
+            table[file][occ] = uint8_t(sliding_attack(ROOK, Square(file), occ));
     return table;
 }();