diff -r f1b6a0388d85 -r 231e5f07a657 src/chess/rules.c
--- a/src/chess/rules.c	Tue Jul 21 14:09:55 2026 +0200
+++ b/src/chess/rules.c	Thu Jul 23 11:37:35 2026 +0200
@@ -141,7 +141,7 @@
                     }
                     /* ambiguous file, name row */
                     if (ambfiles > 1) {
-                        string[idx++] = filechr(move->fromrow);
+                        string[idx++] = rowchr(move->fromrow);
                     }
                 }
             }