Cape crusader is Argento King
Cape Tribulation put himself in the Gold Cup picture with a last-gasp success in the Argento Chase at Cheltenham.
In an attritional renewal, only the winner, Hunt Ball and Imperial Commander were in contention from quite some way out as gruelling conditions took a toll.
Hunt Ball and Imperial Commander were going powerfully at the head of affairs, but Cape Tribulation was all the while in their slipstream under a superb waiting ride from Denis O'Regan.
Hunt Ball gave way in the straight and just as Imperial Commander, the 2010 Gold Cup winner having his start for 680 days, looked like he had done enough, the Malcolm Jefferson-trained Cape Tribulation (7-1) dramatically got up on the line.
O'Regan said: "He jumped well, he travelled great and he enjoyed the ground.
"He's a different horse this year and I'm delighted.
"I missed the second-last and I had to give him a chance to get rolling again.
"He loves Cheltenham and he tried his heart out. He's a very tough horse when it comes down to it."