diff --git a/.gitmodules b/.gitmodules
index f8fbcb6..863bb52 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -36,3 +36,6 @@
 	path = sudoku/moul
 	url = https://github.com/moul/sudoku
 	branch = master
+[submodule "sudoku/zigazou"]
+	path = sudoku/zigazou
+	url = https://github.com/zigazou/Sudoku
diff --git a/sudoku/zigazou b/sudoku/zigazou
new file mode 160000
index 0000000..c6e8af4
--- /dev/null
+++ b/sudoku/zigazou
@@ -0,0 +1 @@
+Subproject commit c6e8af473fb8a58d13a9746b79cb571cbb0cda27