Why is this move a blunder, cuz even though he moves his rook one square right and capture the pawn, and capture it, I can capture with the king and then make a one rook mate.
nothing special actually. it's a blunder, because if you took his rook before a queen promotion, you would have queen, and in a case moving a pawn, he takes it,and you have to mate with rook, wich is slower than with a queen
Of course it's not really a blunder (more like an "inaccuracy").
Don't take machine evaluations like that too literally for practical play. Use machine analysis as a tool, but use it intelligently and don't lose sight of the fact that it plays totally differently to human players. It seems that having to mate with K+R vs K instead of K+Q vs K pushes the forced checkmate over the engine look-ahead horizon in this case, but that isn't how humans play.
@Chess-King90
Just because the 3500 rated engine found a better option at higher depth.
The rule is: Never use engine in opening or simple endgame where it is pretty obvious about the moves. Any move that wins can be played without any issue.
Just because the 3500 rated engine found a better option at higher depth.
The rule is: Never use engine in opening or simple endgame where it is pretty obvious about the moves. Any move that wins can be played without any issue.