Chess problem by A. G. Kopnin - Russian notation explanation needed [Title &quot;Alexey Grigorievich Kopnin - mate in two - 1948&quot;]
[FEN &quot;nR1rB3/2PPPN2/bbk1N3/1p2p3/1p2P1nq/1K1Pp3/7B/8 w - - 0 1&quot;]

(source)
In this problem, it’s white to move and mate in two. What is the solution?
In the link (source) there is also a solution but it is in Russian notation and I do not understand it. (Maybe I would not understand it even if it was in English notation) I need to see the exact moves explicitly.
Here is the Russian solution:
1.d4! (угроза 2.d5#)
1…ed 2.Kfd8#
1…K:c7 2.Ked8#
1…C:d4 2.cdK#
1…Kf6 2.edK#
1…Л:b8 2.d8K#
(1…Л:e8 2.deФ/C#)

What move is the &quot;1…ed&quot; for example? There are just two columns &quot;ed&quot; but what is the row number and what piece should be moved and where?
What move is the &quot;1…ed&quot; for example?

&quot;ed&quot; indicates that an e pawn takes a d pawn.

Maybe I would not understand it even if it was in English notation

It is actually in algebraic notation. If you follow the link you will find that it even tells you what the Russian abbreviations are for the pieces!
From there it is easy to work out that this is what it means:
[Title &quot;Alexey Grigorievich Kopnin - mate in two - 1948&quot;]
[FEN &quot;nR1rB3/2PPPN2/bbk1N3/1p2p3/1p2P1nq/1K1Pp3/7B/8 w - - 0 1&quot;]

1. d4 {threat d5#} exd4 (1...Nxc7 2. Nexd8#) (1...Bxd4 2. cxd8=N#) (1...Nf6 2. exd8=N#) (1...Rxb8 2. d8=N#) (1...Rxe8 2. dxe8=B#) 2. Nfxd8# 

Note that &quot;mate in 2&quot; means that white mates in 2 moves exactly against any defence. Hence listing all the possible black replies to the first move.