Eliud Kipchoge tackles Ineos's 159 Challenge on Saturday in his second bid to break the two-hour barrier in the marathon.

The Kenyan is feeling confident he can succeed two years after his narrow miss in 2017 at the Nike Breaking2 project, where he failed by just 26 seconds.

This time it will be in Vienna, with the project carefully managed to obstract every last advantage possible, no matter how small.

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The world record holder will be running in the same weekend as the Chicago Marathon, where Mo Farah will race. 

Here's how you can watch Kipchoge take on the 159 Challenge.

Eliud Kipchoge hopes to break the two-hour barrier (AP)

How can I watch it and is there a live stream?

Ineos will broadcast the challenge on their official YouTube channel here, meaning it can be live streamed from mobile devices.

But the BBC will also show the challenge live on the red button, as well as through the BBC Sport website.

Who is Kipchoge?

Kipchoge is perhaps the best candidate in the world to attempt such a historic achievement in breaking the two-hour barrier for the marathon. 

A four-time champion of the London marathon, having won the last two editions, as well as a two-time winner in Berlin and a solitary victory in Chicago to go with his Olympic gold medal.

What is the 1:59 challenge?

Ineos have sponsored the event, which will take place around the 4.3km stretch on the Prater Hauptallee in Vienna, Austria, with 4.4 laps required to complete the marathon distance.

Elevation will remain comfortably flat, though it will fluctuate between 1.8 and 4.0 metres. One request of Kipchoge since Nike Breaking2 was to involve fans, meaning the route will be lined by spectators in order to provide him with support.

Kipchoge poses with his pacemakers Jonathan Korir, Augustine Choge and Gideon Kipketer (PA)

Will it be a world record? 

No, there are no other entrants for the challenge (though Jonathan Korir, Augustine Choge and Gideon Kipketer will act as pacemakers), meaning Kipchoge’s attempt will contravene IAAF rules, as there will be 41 athletes providing him with the requisite pace, rotating in and out, as well as protecting him from the wind.

A world record attempt could be valid if the pacers did not rejoin the race, but this is not the case here.

When is the attempt?

The challenge will take place on Saturday 12 October.

The final start time is 08:15 CEST (07:15 BST).

Kipchoge prefers the weather to be between seven and 14 C, with humidity beneath 80 per cent, meaning it should start in the early hours of the morning.

The numbers

Here are the numbers Kipchoge must hit in order to break 2:00:00. Kipchoge will need to sustain a 4:34 minutes per mile pace over the distance to complete the challenge.

100m: 17.08s

200m: 34.17s

400m: 1 minute, 8 seconds

800m: 2 minutes, 16 seconds

1,500m: 4 minutes, 16 seconds

5,000m: 14 minutes, 13 seconds

10,000m: 28 minutes, 26 seconds

Half-marathon: 59 minutes, 59 seconds

What Kipchoge’s saying

“I want to unlock that thought that there are limitations in the human being,” Kipchoge told The Associated Press upon the challenge’s launch.

“There are no barriers when you believe in yourself and try and trust in what you are doing.” 

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