Mystery Island has provided Grand Annual Steeplechase winning jockey Shane Jackson with his biggest win as a trainer.

A brilliantly judged ride by Harry Coffey aboard Excelleration denied South Australia and The Map a fairytale victory in the $350,000 Group 2 TAB Adelaide Cup (3200m) at Morphettville on Monday.

Excelleration has won a drama-filled edition of the Adelaide Cup.

Excelleration aiming to be first horse to win Launceston Cup/Adelaide Cup double in 15 years on Monday.

Caulfield inner track set to debut in March.