@6599
"Post your 10/10 wins against SF15. You should have no difficulty if there's no uncertainty."
++ This shows a complete lack of understanding. A position being analytically drawn, won, or lost has nothing to do with that position being empirically drawn, won, or lost in a contest between two human or engine players.
1 e4 e5 2 Ba6? is analytically lost for white. It is a checkmate in 53. That does not mean a human cannot draw or even lose it as black against an engine, just like a human may even lose a game with queen odds against a grandmaster.
1 e4 e5 2 Ba6? loses. That is 100% certain and not 99.99% certain. Probalility is inappropriate for deterministic events. You can ask about the probability that player A wins position X against player B. That is empirical, not analytical. Probability is always linked to an experiment, i.e. empirical. The experiment can be coin tosses, or detecting radioactive decays, or playing chess games.
A player may know that KBN vs. K is a forced checkmate in less than 50 moves. That is 100% certain. He may however fail to do so in a game against an engine or human. His inability to checkmate does not make it less than 100% certain that the position is a forced checkmate in less than 50 moves.
^^ Very grown up.