1.Nd7+
Revealing how overworked the e6-bishop is; it was needed to cover both
d5 and d7, but just like man, he may serve but one master at a time.
Here, Black chooses to move the king, allowing the e6-bishop to
continue supporting d5.
1...Ke7
If instead Black abandons d5 by 1...Bxd7 then 2.Nxd5
Analysis Diagram: after 2.Nxd5
...and as Black must protect against the threatened mate on h8 (now
that the knight controls e7, heretofore the black king's escape
square), she lacks the time to save her queen.
2.Nxf6
Once again, Black was unable to save her queen. White wins.
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