[Retros] rights & ocassions

[Nicolas Dupont]

Hi Roberto,

I'm not sure to have fully understood your appoach, if not please forgive me.

You want to link the words "having the right to castle" with the words  
"being able to castle in the future". To my eyes such a link doesn't  
exist, even in real life: I have the right to win against Carlsen otb,  
although it will never appear!

Best,

Nicolas.