# HG changeset patch
# User Mike Becker <universe@uap-core.de>
# Date 1784890438 -7200
# Node ID 835776e0338f4476fb80a08ac94d0d74e2e8d268
# Parent  5336e985bd6988215e4a18dce6015c9fadda6e92
fix: disambiguation by row while capturing was not implemented

fixes #934

diff -r 5336e985bd69 -r 835776e0338f src/chess/rules.c
--- a/src/chess/rules.c	Fri Jul 24 12:44:42 2026 +0200
+++ b/src/chess/rules.c	Fri Jul 24 12:53:58 2026 +0200
@@ -804,8 +804,14 @@
             if (mstr[2] == 'x') {
                 move->capture = 1;
                 if (move->piece) {
-                    /* capture (e.g. "Ndxf3") */
-                    move->fromfile = fileidx(mstr[1]);
+                    /* capture (e.g. "Ndxf3" or "R1xh3") */
+                    if (isfile(mstr[1])) {
+                        move->fromfile = fileidx(mstr[1]);
+                    } else if (isrow(mstr[1])) {
+                        move->fromrow = rowidx(mstr[1]);
+                    } else {
+                        return INVALID_MOVE_SYNTAX;
+                    }
                 } else {
                     /* long notation capture (e.g. "e5xf6") */
                     move->piece = PAWN;