Curious on some rules/courtesy in real league or club face to face games,
Outside aid: I assume we are supposed to calculate everything in our minds without any outside help, such as simulating moves and variations in a tool like OGS Analyze game.
Self note: how about writing down some thoughts in a piece of paper like I often do with OGS Malkovich? For example, on OGS, I write down things like O6 urgent point to remind myself to consider before next move. This is helpful especially in correspondent games, where it is typical my next move may be in hours and even days. In face to face game, it does not seem to be that useful, but still I am curious if it is allowed or considered abnormal.
Break: I was told people cheat in chess games by going to restroom and plug in their games in software for the next move. It is not a rule, but courtesy, players typically ask “permission” from their opponents to take breaks. I am curious in a formal GO tournament. What is the rule or courtesy?
Anything else around this topic to share?