From 7e021a821b49306eaa8b0688e4b91d2db25d4878 Mon Sep 17 00:00:00 2001
From: Aargh Rai <aargh.rai+git@gmail.com>
Date: Tue, 26 May 2026 14:07:15 +0530
Subject: rook moves

---
 src/bitboard.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'src/bitboard.h')

diff --git a/src/bitboard.h b/src/bitboard.h
index a3735d1..912cad0 100644
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -50,11 +50,13 @@ enum {
 #define BITMASK_FILE_G 4629771061636907072ULL
 #define BITMASK_FILE_H 9259542123273814144ULL
 
+#define occupied_by(bitboard, index) (bitboard & ((bitboard_t)1 << index))
+
 typedef struct {
   bitboard_t bitboards[PIECE_TYPE_COUNT];
   u8 castling;
   u8 turn;
-  u8 passantable_column;
+  u8 passantable_file;
 } position_t;
 
 position_t position_starting();
@@ -64,4 +66,4 @@ bitboard_t blacks(position_t position);
 
 void print_bitboard(bitboard_t bitboard);
 
-#endif // !BITBOARD_H
+#endif // BITBOARD_H
-- 
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