Endgame Study - M. Liburkin, 1931, 2nd prize

Drag the pieces to solve!

Sorry, but this puzzle might be wrong. How bout 1. Rd5+

We need to check this.

I think it's OK. It's one of my all-time favorite endgames!

Yes Indeed but the question must be answered. 

I have added the solution on 1... Rd5 thanks to Dude for the vigilance.

Not sure it's enough though...

Wrong line! 3. .. Rc3! wins for black! Winning though is: 2. Kc2! Rc5+ 3. Kd3! Rxc1 4. Kd4 and a white pawn promotes.

Actually, I always mix up the variations of this study myself. Tells you why it is a great one!

Thank you (!) this is fixed now.

quick question about this study: why is it 1. Nc1 and not 1. Nb4?

1.Nb4 leads to a draw, all black must do is capture both pawns with his Rook to draw.

Appaluse!