I heard that on Tisha bi'Av the rules of not learning Torah also apply on Ches Av (the eighth of Av).
So I have a few questions on Chess Bi'Av.
Is there a source for this
This question What can one learn on Tisha B'Av? says some things you can learn on Tisha B'av, so my question is: Does all of these things apply to Ches B'av or some things are more lenient and you can learn different/more things?