Hi, I was doing puzzles on lichess, I’m 2200 elo, and I had this puzzle. I thought about it and found that Rb8 was a winner because it wins the lady, (she is obliged to take otherwise we have Qf5).
I would like to know why it counted it wrong when it is -5 on the evaluation bar and it is one of the two moves that wins, the second move also wins the queen and it is at -5.5, it is counted as a blunder while it is an extreme winner. (Problem #FJtVd)