In a daily game, it's entirely permissible to study the previous games of your opponent. You can't use an engine to do any analysis that is relevant to an ongoing game, but you could use an analysis board with the engine turned off.
Of course, that only helps you so long as they follow the same line as in a previous game.
Hello, I don't know if the discussion is still followed, but I'll try anyway XD
I think I already know the answer, I am going to ask out of curiosity. Sometimes, in daily chess, happens that an opponent generally plays according to specific patterns. So, I believe it is allowed studying the available previous games if one wants to knows better his/her opponent, with the relative analysis as well. And then, one could try to benefit from the opponent's previous mistakes (if he/she is not careful in learning from his/her mistakes). But in principle, it could be possible moving following the best moves played in the opponent's previous games (by him/her and against him/her). Am I right? Thank you in advance.