Reigning Caulfield Cup winner Best Solution has been retired from racing with stud plans for the Godolphin-owned horse yet to be announced.

Trained by Saeed bin Suroor, Best Solution won nine races including three at Group One level.

After back-to-back Group One victories in Germany last year, Best Solution travelled to Australia and carried top weight of 57.5kg to win the $5 million Caulfield Cup (2400m).

He was unplaced in the Melbourne Cup and again in his two starts since in the Group Three September Stakes at Kempton and the Group One Preis von Europa at Cologne.

"Best Solution won Pattern races at two, three and four, and gave us three fantastic days with his Group One victories in Germany and Australia last year," bin Suroor said.

"He was a brilliant horse to train and represented Godolphin with great credit throughout the world.

"He was a very brave horse, who always gave his all in his races, and we had some great times with him. We will miss him at Godolphin Stables but hopefully we can look forward to training some of his sons and daughters in the future."