Can you tell me why this is not a blunder? : r/chess

My opponent lost the game with this blunder. : r/chess

Can someone explain to me why this was a blunder? He had a possible fork on c2 if I hadn't moved my rook. If I did the best move recommended I would've

I don't know how they do their rankings for Mistake, Miss, and Blunder, but I think revealing a checkmate should be classified as a blunder : r/chess

Can anyone explain this end-game blunder? : r/chess

why is this considered a mistake and not a blunder? black mates next turn? : r/chess

b5, played in over 50% of games, is a blunder! Can you find why ? : r/chess

How is this a blunder? : r/chess

Blunder - Chess Terms

Why is this a blunder? : r/AnarchyChess

I don't understand it. Why is this move a blunder? Does it break some general principle in opposite side castling, or is there a concrete idea for black it allows? : r/chess

How is this a blunder? It set up mate in 3 : r/chess

After Black's blunder, there is an only move for White to win on the spot. Can you find the knock out? : r/chess

why is this a blunder? rook to e8 might be good but it sacrifices the rook so i think blunder is a bit too rough, as i was pretty proud of this move :( : r/chess

Stockfish consider this move as inaccuracy. Can anyone explain to me why this move is not good ? : r/chess