Here’s an interesting example of when castling is bad and not castling is good. In this game castling was a blunder for my opponent and not doing so was best for me. Also, as Nelson says, just wait for them to make a mistake. Patience won this game: https://www.chess.com/game/live/123980399685

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Chess: TeddyElBorador vs crashmondojr

TeddyElBorador (1271) vs crashmondojr (1321). crashmondojr won by checkmate in 24 moves. Click to review the game, move by move.