diff --git a/TODO.org b/TODO.org
index ead1fcb..50a1a64 100644
--- a/TODO.org
+++ b/TODO.org
@@ -1,5 +1,31 @@
 #+OPTIONS: toc:nil
 
+**This is not a working chess program !!**
+/I am only experimenting some chess programming concepts./
+
+* Installation (don't do it until version 0.9)
+** clone repos
+*** user...
+#+BEGIN_EXAMPLE
+$ git clone https://git.raoult.com:bruno/brchess.git
+#+END_EXAMPLE
+or
+#+BEGIN_EXAMPLE
+$ git clone https://git.raoult.com:bruno/brchess.git
+#+END_EXAMPLE
+
+*** ... or developer
+#+BEGIN_EXAMPLE
+$ git clone https@git.raoult.com:bruno/brchess.git
+$ cd brchess
+$ git remote add github git@github.com:braoult/brchess.git
+#+END_EXAMPLE
+** add "brlib" submodule
+#+BEGIN_EXAMPLE
+$ git submodule init
+$ git submodule update --remote --merge
+#+END_EXAMPLE
+
 * NFSv4 with Kerberos on Debian from scratch
 #+BEGIN_QUOTE
 /(C)2022 Bruno Raoult./