From 559f0db891b73eaf115d57d26e0fe2376a4a5ed2 Mon Sep 17 00:00:00 2001
From: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
Date: Sat, 15 Nov 2014 02:56:31 +0100
Subject: [PATCH] Slightly better diagnostics.

---
 Board.pm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Board.pm b/Board.pm
index 2edc07d..39c8134 100644
--- a/Board.pm
+++ b/Board.pm
@@ -200,8 +200,11 @@ sub parse_pretty_move {
 			push @squares, [ $row, $col ];
 		}
 	}
+	if (scalar @squares == 0) {
+		die "Impossible move $move";
+	}
 	if (scalar @squares != 1) {
-		die "Ambigious or impossible move $move";
+		die "Ambigious move $move";
 	}
 	return (@{$squares[0]}, $to_row, $to_col, $promo);
 }
-- 
2.39.2