This patch updates gnuchess from 6.2.9 to 6.2.11.

Tested on amd64.

Index: Makefile
===================================================================
RCS file: /cvs/ports/games/gnuchess/Makefile,v
diff -u -p -r1.52 Makefile
--- Makefile	26 Sep 2023 09:41:36 -0000	1.52
+++ Makefile	21 Apr 2025 05:20:57 -0000
@@ -1,6 +1,6 @@
 COMMENT=	chess program
 
-DISTNAME=	gnuchess-6.2.9
+DISTNAME=	gnuchess-6.2.11
 DISTFILES=	${DISTNAME}.tar.gz book_1.02.pgn.gz
 
 CATEGORIES=	games
Index: distinfo
===================================================================
RCS file: /cvs/ports/games/gnuchess/distinfo,v
diff -u -p -r1.16 distinfo
--- distinfo	14 Jul 2021 12:54:35 -0000	1.16
+++ distinfo	21 Apr 2025 05:20:57 -0000
@@ -1,4 +1,4 @@
 SHA256 (book_1.02.pgn.gz) = 3qx37bBhpZJJoZ3rA9o0nK4FHlJSemy1r4CNk5jTLUQ=
-SHA256 (gnuchess-6.2.9.tar.gz) = 3fzCC911aQCpq2xCx9r5CiiTv38ZzjR0IM42uuvEGJA=
+SHA256 (gnuchess-6.2.11.tar.gz) = 2BFA7qXGnRSwz7Y4FtS0yeGPulH1Jn3lsVOfRok56b0=
 SIZE (book_1.02.pgn.gz) = 26265281
-SIZE (gnuchess-6.2.9.tar.gz) = 802697
+SIZE (gnuchess-6.2.11.tar.gz) = 811399