411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e5/2. Nf3/2...f5/3. Bc4/3...fxe4/4. Nxe5/4...d5/5. Qh5
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Polerio-Svedenborg variation C40 Latvian gambit → Mayet attack → Polerio-Svedenborg variation
5. Qh5
White brings their queen out and checks Black's king.
5...Ke7?? would lose to a forced mate in 9 after 6. Qf7+, so Black has to find the surprising 5...g6!?, sacrificing the exchange after 6. Nxg6 hxg6 7. Qxh8, but after 7...Kf7! White's queen is trapped in the corner and White's bishop on c4 is still attacked.