1. Kc3!

Thematic try: 1. Kc4? Kd2 2. Rd3 + Ke2 3. Rh3 Nb8 (c7) 4. Rxh4 Kf3! =

1 .... Kd1

2. Rh3 Ke2

3. Rxh4

A) 3 .... Kf3!

4. Rc4!

4. Kd4? Nb4! 5. Rh2 Nc6 + =

4 .... Nb8

5. Kd4!

5. Rd4? Nc6 =

5 .... Nd7

6. Rc7!

Thematic try: 6. Rc6? Kg4!! (6 ... Kf4? 7. Rd6! Nf8 8. Rf6 + + -) 7. Rd6 Nf8 8. Rf6 Nh7! (8 ... Nd7?9. Rf7! + -) 9. Rf7 Ng5 =

6 .... Nf6

7. Rf7! + -

B) 3 .... Ke3!

4. Kc4!

4. Rc4? Nb8! 5. Rc7 Ke4 6. Kc4 Ke5 7. Rc8 Nd7! =

4 .... Nc7

5. Rh7!

Thematic try: 5. Rh6? KF4!! (5 .... Ke4? 6. Rc6! Ne8 7. Re6 + + -) 6. Rc6 Ne8 =

5 .... Ne6

6. Re7! + -

In both lines black Knight is pinned (echo on two adjacent files)