Board: add random

src/repr/board.rs

@@ -5,6 +5,7 @@ use super::{
     CoordAxis, CoordPair,
 };
 use const_fn::const_fn;
+use rand::{seq::IteratorRandom, Rng};
 use std::{cmp::Ordering, fmt, sync::LazyLock};
 
 #[derive(PartialEq, Eq, Copy, Clone, Debug)]
@@ -97,6 +98,21 @@ impl Board {
         }
     }
 
+    pub fn random(steps: usize) -> Self {
+        let mut new = Self::new().starting_pos();
+        let mut p = Piece::Black;
+        let mut rng = rand::rng();
+        for _ in 0..steps {
+            if let Some(m) = new.possible_moves(p).choose(&mut rng) {
+                new.place_unchecked(m, p);
+            }
+
+            p = !p;
+        }
+
+        new
+    }
+
     /// Starting position
     pub fn starting_pos(mut self) -> Self {
         self.place_unchecked(