Ridiculous
Lacking
Use for practice
There’s a difference…
When you know how to do something you can improve your skill through practice.
Amateurs practice until they get it right and professionals practice until they never get it wrong.
If you have no idea how to go about learning how to play blindfolded then this is not the best way to learn; it’s ok to practice if you already have an idea about chess notation and visualisation and memory techniques but on its own I think ‘beginners’ will struggle.