user4277: I have been looking at corresponding squares recently. 
It can be pretty hard to visually calculate and imagine them in your mind. 
What I was wondering, would you ever be allowed to draw your plans on paper? 
I know in tournaments you are allowed pen & paper for your moves, could you scribble on that or under what circumstances would this not be allowed? I would have assumed in world championships you would not be allowed to do this. Is my assumption correct and what about club level / school players etc?
Example of what I mean by calculation: http://www.chess.com/forum/view/chess-mentor/tricky-chess-problem-elo1700---corresponding-squares?ncc=3

user7500: This is never allowed in an actual, over-the-board tournament.
National chess federations ban analysis notes, and local chess organization follow their national rules for rating.

4277: <p>I have been looking at corresponding squares recently. </p>

<p>It can be pretty hard to visually calculate and imagine them in your mind. </p>

<p>What I was wondering, would you ever be allowed to draw your plans on paper? 
I know in tournaments you are allowed pen &amp; paper for your moves, could you scribble on that or under what circumstances would this not be allowed? I would have assumed in world championships you would not be allowed to do this. Is my assumption correct and what about club level / school players etc?</p>

<p><strong>Example of what I mean by calculation:</strong> <br><a href="http://www.chess.com/forum/view/chess-mentor/tricky-chess-problem-elo1700---corresponding-squares?ncc=3" rel="noreferrer">http://www.chess.com/forum/view/chess-mentor/tricky-chess-problem-elo1700---corresponding-squares?ncc=3</a></p>
 7500: <p>This is never allowed in an actual, over-the-board tournament.</p>

<p>National chess federations ban analysis notes, and local chess organization follow their national rules for rating.</p>
