feat: basic En Passant implementation

1 files changed, 16 insertions, 0 deletions

diff --git a/src/square.rs b/src/square.rs
index ed2877c..1adca83 100644
--- a/src/square.rs
+++ b/src/square.rs
@@ -19,6 +19,22 @@ impl Square {
     pub fn to_bitboard(&self) -> Bitboard {
         1u64 << *self as u8
     }
+    /// 0-based rank
+    pub fn rank(&self) -> u8 {
+        *self as u8 / 8
+    }
+    /// 0-based file
+    pub fn file(&self) -> u8 {
+        *self as u8 % 8
+    }
+
+    pub fn nort_one(&self) -> Self {
+        Self::from(*self as u8 + 8)
+    }
+
+    pub fn sout_one(&self) -> Self {
+        Self::from(*self as u8 - 8)
+    }
 }