@9357
"Once 7 men are reached castling rights are forfeited. I never heard of such a rule."
++ It is no rule, it is a practical observation. You cannot construct a reasonable game that reaches a 7-men position with castling rights intact. Players castle, or move a king, or the rooks.
"there is no proof chess is a draw with best play"
++ I presented an inductive proof as well as a deductive proof. Ii took care to explain in simple terms, but If you still do not understand either, then you do not need to be ashamed.
"There's a high percentage of GM draws. But - that doesn't mean no mistake was made."
++ At the 2024 Toronto Candidates' Tournament they made 1.1 error / game average.
However, an engine at 3 minutes / move is much stronger than a grandmaster at 3 minutes / move. An ICCF (grand)master with engine at 5 days/move average is much stronger than an engine at 3 minutes / move. At this year's ICCF World Championship Finals they have reached no mistakes as proven.
"It can mean nobody made a big enough mistake" ++ There are no small or big mistakes.
Per GM Hübner there are only errors (?) that change the game state from a draw to a loss, or back from a win to a draw, or blunders or double mistakes (??) that change a win to a loss.
@9358
"There is no such thing as 'weakly solved'."
++ There is, e.g. Schaeffer's proof how to draw Checkers.
Please read Prof. van den Herik's scientific paper Games solved: Now and in the future.
https://www.sciencedirect.com/science/article/pii/S0004370201001527