Helpmate in 2 - retro

Helpmate in 2.

Black moves; White mates on his 2nd move. Black and White cooperate to achieve the goal.

Bxd4, Rxb3, Rc5, Nd2#?

Originally posted by doodinthemood
Bxd4, Rxb3, Rc5, Nd2#?

What was White's last move?

d2-d4?

Originally posted by doodinthemood
d2-d4?

So does that yield any other solutions?

Originally posted by SwissGambit
So does that yield any other solutions?

i couldnt find any after the e.p. move

Also, Exd3, Kxh3, d4, Na3#

And the last move could also have been Kg3-h4

Originally posted by doodinthemood
Also, Exd3, Kxh3, d4, Na3#

And the last move could also have been Kg3-h4

Yeah...that's the try. Kg3-h4 is a possible last move. Can anyone else see why?

Originally posted by SwissGambit
Yeah...that's the try. Kg3-h4 is a possible last move. Can anyone else see why?

Last moves could have been -1.Kg3-h4 g4xf3ep! -2.f2-f4 Qb8+. The possibility of one en passant [g4xf3] disproves another [e4xd3].