From 1104c8e6c57c79369d1af0f0dcfb130fdb11efdd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Varga=20D=C3=A1vid=20Lajos?=
 <vargadavidlajos@mailbox.unideb.hu>
Date: Sat, 15 Nov 2025 10:21:00 +0100
Subject: [PATCH] added helper method for fen parsing to utils.rs

---
 engine/src/bitboard/utils.rs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/engine/src/bitboard/utils.rs b/engine/src/bitboard/utils.rs
index a30e503..25d7ba8 100644
--- a/engine/src/bitboard/utils.rs
+++ b/engine/src/bitboard/utils.rs
@@ -27,6 +27,27 @@ pub fn notation_from_square_number(sq: u8) -> String {
   return notation;
 }
 
+pub fn try_get_square_number_from_notation(notation: &str) -> Result<u8, ()> {
+
+  let file = match notation.chars().nth(0).unwrap() {
+    'a' => 0,
+    'b' => 1,
+    'c' => 2,
+    'd' => 3,
+    'e' => 4,
+    'f' => 5,
+    'g' => 6,
+    'h' => 7,
+     _  => { return Result::Err(()); }
+  };
+  if let Some(rank) = notation.chars().nth(1) {
+    return Result::Ok(file + 8 * (rank.to_digit(10).unwrap() as u8) - 8);
+  }
+  else {
+    return Result::Err(());
+  }
+}
+
 
 // <----- TESTS ----->