Can your engine crack this puzzle

[Nordlandia]

[d]1rk1br1q/1pbp1n2/5p2/4P3/PpQR1PPN/4R1p1/1PK4n/6B1 w - - 0 0

Forced mate in 13!

Please share time it require before the engine spot the winning move 1. Rc3.

[Sean Evans]

Hi, this is a human chess players forum, your post should be in CCC.

Sean

[fern]

Beautiful.
After pxR, QxB check follows, then Rc4 chek, then the bishop, etc
beautiful indeed.
It took me 20 seconds to solve it once I had the key first move. Without it I doubt It would take me less than half an hour.
Fern,

[neelbasant]

[d]1rk1br1q/1pbp1n2/5p2/4P3/PpQR1PPN/4R1p1/1PK4n/6B1 w - - 0 0

Forced mate in 13!

Please share time it require before the engine spot the winning move 1. Rc3.

Houdini 3 Tactical finds it in less than 1 minutes.

[Nordlandia]

Both Stockfish and Komodo fails to find the winning move!

Houdini 4 Pro Tactical find it under 1 minute.

Analysis by Houdini 4 Pro x64:

1.Rc3 bxc3 2.Qxc7+ Kxc7 3.Rc4+ Kd8 4.Bb6+ Ke7 5.Ng6+ Ke6 6.f5+ Kd5 7.Ne7+ Kxe5 8.Bc7+ d6 9.Kd3 Ng5 10.Ba5 Nhf3 11.Ke3 Nd4 12.Rc5+ dxc5 13.Bc7#
+- (#13) Depth: 25/63 00:00:53 1187MN, tb=11

[Terry McCracken]

It's a brilliant combination. Who were the players?

[Nordlandia]

It's a composition by Otto Blathy.

[Terry McCracken]

Ah..Okay, thanks! 1. Rc3!! is very nice.