From e9c96e83daa5d2a3a73ee64bac43bccd58c2a403 Mon Sep 17 00:00:00 2001
From: Karma Riuk <riukkarma@gmail.com>
Date: Tue, 4 Feb 2025 21:50:30 +0100
Subject: [PATCH] fixed en passant offset

---
 cpp/src/board.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/cpp/src/board.cpp b/cpp/src/board.cpp
index 6e65fd1..b8c1f43 100644
--- a/cpp/src/board.cpp
+++ b/cpp/src/board.cpp
@@ -183,7 +183,8 @@ Board Board::make_move(Move move) const {
 
     // -- Handle en passant target being eaten
     if (move.en_passant)
-        ret.squares[move.target_square - 8] = Piece::None;
+        ret.squares[move.target_square + (white_to_play ? -8 : 8)] =
+            Piece::None;
 
     // -- Handle promotion
     if (move.promoting_to != Piece::None)