diff --git a/samples/data/chessboard.png b/samples/data/chessboard.png
index 39bb399e89ffe43397125f457fad252fcc746ffc..1f9112c3a45c8191c969c20649aafb528803a6f6 100644
Binary files a/samples/data/chessboard.png and b/samples/data/chessboard.png differ