Can someone explain to me how castling into a queen here made this game a draw?
The position is a stalemate - a special drawing position. Black has no legal moves, and the Black king is not in check.
You can learn all about it here: https://www.chess.com/terms/stalemate-chess
Can someone explain to me how castling into a queen here made this game a draw?
https://www.chess.com/c/YcbvpdXt