Wicc
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Well, by the way, yes, it seems that the whole trick lies in this check – Black doesn’t have enough moves to reinforce the pawn on e6 with the rook. If the king were on f8, then, on the contrary, it would be necessary to sacrifice the rook on g6 and then take with the knight on g6 with check. And if the black rook was initially on e8, then no sacrifices would work.
