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A pretty exercise in the co-ordination of queen and knights.
1.Sfe7 threatens 2.Qf4+ Ke6 3.Qf5. The two full-length thematic variations end in echoed sideboard mates: 1...g5 2.Sc6+ Ke6 3.Qe4+ Kd7 4.Qe8+ Kxe8 5.Sf6 and 1...Kd4 2.Sc6+ Kc4 3.Qe4+ Kb5 4.Qa4+ Kxa4 5.Sc3. There is an unfortunate dual after 1...g6 2.Sc6+ Ke6 3.Qe4+ Kd7 4.Qe8+ or 4.Sa7 any 5.Qe7, but this is a small flaw in an otherwise excellent Bohemian more-mover.
Peter Niehoff: Queen sacrifices, with echoed model mates. “The lady vanishes" (Hitchcock)!
Jacob Hoover: Two variations result in echo mates. There is also a short mate with 1 ... Sg6 2 Sc6+ Ke6 3 Qf7, but this is relatively unimportant, though I find it interesting that White's second move is the same in all three variations.
Dafydd Johnston: Marvellous correspondence between the two queen sacrifices.
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