Why is castling a bad move?

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I_sell_pelicans
I am beginner/intermediate at chess. I was wondering if someone could please explain why castling to the right is a bad idea, and why king d2 is the winning move. My thoughts are that by castling to the right, the king is able to defend against a possible check from rook e8 and at the same time protect the 2 pawns in f and g. Moving the king to d2 leaves these pawns unprotected so how is this the best move? thanks. [Event "Vs. Computer"] [Site "Chess.com"] [Date "2023-12-22"] [White "I_sell_pelicans"] [Black "Deadlost"] [Result "*"] [WhiteElo "712"] [BlackElo "1300"] [TimeControl "-"] [Termination "*"] 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 Bb4 5. Nxe5 Bxc3+ 6. bxc3 O-O 7. Bg5 d6 8. Nxc6 bxc6 9. Qf3 h6 10. Bxf6 Qxf6 11. Qxf6 gxf6 12. Bd3 f5 13. exf5 Kh7 14. f6+ Kg8 *
KeSetoKaiba
KeSetoKaiba

Kingside castling is a fine move in that position. After castling that way, the engine gives +1.78 with the advantage for white. With Kd2, the engine gives +2.18 with a smidge of an advantage more. Both moves are winning though, so I wouldn't say "castling to the right is a bad idea."

What I will say though is that the purpose of castling is usually to protect the King and develop the Rook out of the corner. In this case, "protect" from what? Most pieces have been exchanged off and there is little danger of checkmate. In the endgame, the King has more freedom to leave its shelter and it is a common idea to march the King activity towards the center of the board.

In this position, Kd2 decides the King is safe enough that it doesn't need to get castled. It is safe enough on d2 and because this is an endgame, it might be more active towards the center.

I_sell_pelicans

@KeSetoKaiba great response thank you for the comment

KeSetoKaiba

You're welcome happy.png

KeSetoKaiba

Yes @ChessIsLikeFire I've said the same in similar forum threads, but didn't feel like expanding in this exact thread. Thanks for saying it for me grin.png

magipi

The main point is that there are a lot of moves that are okay here. Including castling.

"Why is castling a bad move" is a bad question and a total misunderstanding of what the engine is saying. "Why Kd2 is the best option" is a good question.