Black to move. How can Black save this game? No computer analysis please! 
Chess Daily News from Susan Polgar
Endgame Lesson
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Black to move. How can Black save this game? No computer analysis please!
1. Rd1 with the idea of Rc1+. It’s then a perpetual check, or Black will be able to lop off one pawn with the King, the other with the Rook.
1. Rd1 f7
2. Rc1+ Kd6
3. Rd1+ Kc6
4. Rc1+ Kd5
5. Rf7 f8(Q)
6. Rxf7
followed by Kxc6 =
ac
Hmmm…sacrificing the rook for the white queenside pawn…but I don’t think K+N+KBP vs. lone king is a draw.
I admit it: I’m lost in a lot of endgames. 🙁
1…Rd1?
2.f7 Rc1+
3.Kd5 Rd1+
4.Ke6! …
A)
4… Re1+
5.Kf5! Rf1+
6.Nf4 and under protection of the “bridge” the white f pawn promotes
B)
4… Rf1
5.Ne7 Re1+
6.Kf6 Rf1+
7.Nf5 … the bridge again …
By my guess the only way to save the game is:
1… Ra8 (idea is to force the white king to move back from the 5th rank)
A)
2.f7 Ra5+
3.Kd4 Rf5
4.Ne5 Rxf7
5.Nxf7 Kxc6 with a draw
B)
2.Kd5 Ra5+
3.Ke6 Kxc6
4.Ne7+ Kb7 (threatening 5…Ra6+)
5.f7 Ra8
6.Ng6 Rd8
7.Ke7 Kc7 with a draw
greetings, Vohaul
correct is Ra8!
Ra8! That’s how GM Boris Gelfand could save the game against GM Mickey Adams!
But in a deep time trouble he couldn’t find it…
by the way – at a first glance – and for the sake of completeness
1…Rd6 looks very promising, but it fails due to
2.Ne7! … because 2… Rxf6 is refuted by the knight fork after 3.Nd5+
1… Ra8 2.Kb5 Rb8+ 3.Kc5 Ra8
4.Ne7 Ra5+ 5.Kd4 Kd6 6.Kd3 Ke6
7.c7 Rc5 8.Nd5 Rxc7 9. Nxc7+ Kxf6 1/2-1/2