> For me, my opening choices should get me into a position I am comfortable in and understand rather than one which offers the greatest advantage according to the engine.
Thank you for using bold face. This is my philosophy of chess studying, which is my only ambition, in itself, plus some iota of being outside comfort, but with some clues or hypotheses.
But if I were to play for performance, that is probably what time control pressure might push me toward, just to avoid confusing the game with a studying game. I would rather understand, and rely on external knowledge because it is likely not my forte to reproduce things I do not understand. Whether the opponent does or not, if I do not myself, It won't help to rely on a line.
Not exactly your point, as understanding, for me, is likely to not just be about one move in one line, but about board issues that might be in many lines, even though I would not know the lines.
That perspective might also is behind your "personal repertoire" being very personal: made of positions which likely are in some lines out there, but that you chose for the understanding, likely to have you do that in many "unrelated" line prefixes. Or would eventually, as you play different "pools" not synchronized, or not expert enough to not make errors in their own lines.
What is a repertoire anyway?
dont worry ono my friends didnt play their tournament games and even watched the euros during the tournament
Well done making it in that must have been INTENSE!!
Actual Zombie!