Nice Endgame Problem

[Pressie]

Here is an endgame where the white knight battles against the black queen and wins.

How long does it take your engine to find the win?

[d] 5k2/7p/p2p4/3P4/3N3p/5P1q/P4P2/1R4K1 w - - 0 1

[Jouni]

Analysis by Fritz 10 (P4 2400 from 2003):

1.Ne6+ Ke7 2.Rb7+ Ke8 3.Ng7+ Kd8 4.Ne6+ Kc8 5.Rf7 h6 6.Ng7 Kd8
= (0.00) Depth: 15/38 00:00:07 7568kN
1.Ne6+ Ke7 2.Rb7+ Kf6 3.Rf7+ Ke5 4.Re7 Kf6 5.Rf7+
= (0.00) Depth: 16/40 00:00:18 17754kN
1.Ne6+
² (0.28) Depth: 17/42 00:00:34 33829kN
1.Ne6+
² (0.56) Depth: 17/47 00:00:38 37264kN
1.Ne6+
± (1.13) Depth: 17/47 00:00:38 37513kN
1.Ne6+ Ke7 2.Rb7+ Kf6 3.Rf7+ Kxf7 4.Ng5+ Kf6 5.Nxh3 Ke5 6.f4+ Kxd5 7.Ng5 h6
+- (2.80) Depth: 17/47 00:00:49 47109kN
1.Ne6+ Ke7 2.Rb7+ Kf6 3.Rf7+ Kxf7 4.Ng5+ Kf6 5.Nxh3 Ke5 6.Kg2 h6 7.f4+ Kxd5 8.Kf3 Ke6 9.Kg4 d5 10.f5+ Kf6 11.Nf4 d4 12.Nd5+
+- (2.80) Depth: 18/42 00:01:26 77199kN, tb=1

Jouni