[Event "Castling: Example 2"] [Site "https://lichess.org/study/uVEdX3P4/fvbTZzdD"] [Result "*"] [Variant "Standard"] [ECO "B40"] [Opening "Sicilian Defense: Four Knights Variation, Exchange Variation"] [Annotator "https://lichess.org/@/Juggernaunt"] [UTCDate "2022.06.21"] [UTCTime "02:12:28"] [Source "https://lichess.org/study/uVEdX3P4/fvbTZzdD"] [Orientation "white"] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 Qc7 9. f4 Qb6 10. c4 Bb4+ 11. Ke2! (11. Bd2? Qe3+! { [%csl Re1,Rf4][%cal Re3e1,Rb4e1,Re3f4] }) *