411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e5/2. Bc4/2...Bc5/3. Qh5/3...Kf8
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
rnbq1knr/pppp1ppp/8/2b1p2Q/2B1P3/8/PPPP1PPP/RNB1K1NR
3...Kf8??
This will be Black's last move. Black's desperate attempt to save his king by moving it aside does not protect against White's queen, and White can still deliver checkmate with 4.Qxf7#.