The last three winners feature among 31 entries for the 2020 Magners Cheltenham Gold Cup at Cheltenham on Friday, 13 March.
In 2019 Al Boum Photo ended Willie Mullins' long and agonising wait for a first victory in jump racing's Blue Riband, with Ireland's multiple champion trainer having saddled the runner-up on six occasions.
The great Best Mate (2002, 2003, 2004) is the most recent horse to successfully defend the Magners Cheltenham Gold Cup and Al Boum Photo is likely to head straight to Cheltenham following a convincing victory in at Tramore on New Year's Day.
Mullins accounts for four of the 16 Irish-trained entries in total, with Al Boum Photo joined by his Punchestown Gold Cup conqueror Kemboy, Bellshill and Real Steel.
Two other winners of the Magners Cheltenham Gold Cup are engaged - 2018 victor Native River (Colin Tizzard) and 2017 scorer Sizing John (Jessica Harrington). They are aiming to emulate Kauto Star (2007 & 2009), who is the only horse to regain the crown.
Ireland's challenge also includes multiple Grade One winners Delta Work (Gordon Elliott) and Road To Respect (Noel Meade), who are among six entries for ownership powerhouse Gigginstown House Stud, as well as 2018 RSA Insurance Novices' Chase victor Presenting Percy (Pat Kelly), who started the 100/30 favourite in 2019 when finishing eighth.
No current trainer has enjoyed more success in the race than Paul Nicholls, thanks to the triumphs of See More Business (1999), Kauto Star and Denman (2008). The Ditcheat handler has two entries in 2020 - last year's fifth Clan Des Obeaux, who captured the G1 King George VI Chase for a second time at Kempton Park on Boxing Day, and Frodon, who scored a memorable success in the 2019 G1 Ryanair Chase under Bryony Frost.
Lostintranslation (Colin Tizzard) was pulled up behind Clan Des Obeaux at Kempton Park and has since undergone a wind operation, but had impressed previously when narrowly outgunning Bristol de Mai (Nigel Twiston-Davies) in the Betfair Chase at Haydock Park.
Bristol de Mai, who finished third in last year's Magners Cheltenham Gold Cup, has been kept fresh since the Betfair Chase and is likely to run next in the £100,000 G2 Cotswold Chase on Festival Trials Day, 25 January, the final meeting at Cheltenham before The Festival.
Anthony Bromley, racing manager for owners Simon Munir & Isaac Souede, said: "Bristol de Mai has been pleasing Nigel and is on schedule for the Cotswold Chase at the end of the month, in preparation hopefully for another tilt at the Magners Cheltenham Gold Cup.
"The idea after the Betfair Chase was to always go Cotswold Chase and then Gold Cup, and Nigel has been particularly happy with him of late. There wasn't really a race for him over Christmas, as we did not want to take him to Kempton because he hasn't really fired there for the last couple of years.
"He finished third in the Gold Cup last year and, although he is fairly big odds as things stand, we are looking forward to having another crack at it. Maybe his odds are a touch too big, but we are not kidding ourselves because it is going to be a tough ask. I suppose if he goes and wins the Cotswold Chase, he will shorten, won't he?
"We have put him in the Ryanair Chase as well, just to give us that option, but it is more than likely that he goes for the Gold Cup."
In the Cotswold Chase, Bristol de Mai is likely to clash with Santini (Nicky Henderson), runner-up last season at The Festival in what looked a strong renewal of the RSA Insurance Novices' Chase, and Ladbrokes Trophy hero De Rasher Counter (Emma Lavelle).
Other Magners Cheltenham Gold Cup entries to note are the in-form Henry de Bromhead-trained pair of Monalee and Chris's Dream. Monalee finished second behind Delta Work in the G1 Savills Chase at Leopardstown over Christmas, while Chris's Dream captured the Troytown Handicap Chase impressively at Navan when last seen out in November.
The scratchings deadline for the Magners Cheltenham Gold Cup is at noon on Tuesday, 11 February, with the details revealed the following day. The six-day confirmation and £31,250 supplementary entry stage takes place on Saturday, March 7.
