Have you ever seen (or been in, in my case) a position where your evaluation is high around the 4.0 mark? And then... any move you play will turn the position negative.
#1 This is clearly winning for white: just exf6. Bc8 is bad, Ra8 and especially Rh8 are out of play. The black king is insecure. Pawn e6 is backward on an open file.
Have you ever seen (or been in, in my case) a position where your evaluation is high around the 4.0 mark? And then... any move you play will turn the position negative.