As shown above, White captures the queen at ply 7 after 1.Qe7+ Qg5 (else 2.Qe1+ and mate) 2.Qe4 Qg4 3.Qe3 since Black must sacrifice its queen now. This forced variation will be seen very quickly by most engines (maybe in iteration 4 or even earlier), and with an EGTB lookup at ply 8 the perfect solution is easy to obtain.jwes wrote:I suspect that Naum sees it very quickly, not instantly. White can apparently force an exchange in a few ply and then see the mate with egtbs.
Sven