A 50-1 stunner, Carrickboy kicked clear away with two to jump to win the 4pm Byrne Group Plate, in the hands of Liam Treadwell.
Our racing editor Jonathan Herbert's choice Vino Griego ridden by Jamie Moore was suited to the softer ground and finished second with a great effort to close the winning horse down.
Tartak was third and Hunt Ball was fourth.
Solwhit, in the hands of Paul Carberry, won the 3.20pm World Hurdle and a record £275,000 in prize money two and a half lengths clear of Celestial Halo in second.
Smad Place was third, after a photo finish.
Reve du Sivola was fourth while pre-race favourite Oscar Whisky, trained by Nicky Henderson did not feature much to the disappointment of race-goers
Cue Card ridden by Joe Tizzard and tipped by our racing editor Jonathan Herbert, sailed over the jumps to win the 2.40 RyanAir Chase ahead of of pre-race favourite First Lieutenant, ridden by today's first winner Bryan Cooper.
Third placed was For Non Stop.
Riverside Theatre, co-owned by actor James Nesbitt, was fourth.
Holywell, ridden by Richie McLernon and trained by Jonjo O'Neill, was a deserving winner in the Pertemps Final at 2.05, seeing off Captain Sunshine and Jetson.
A P McCoy's Shutthfrontdoor was fourth, while pre-race favourite Sam Winner ridden by Ruby Walsh could not make his mark on the race.
Benefficient, in the hands of Bryan Cooper, won the 1.30pm Jewson Novices' Chase, the first race of St. Patrick's Thursday.
This is Cooper's first ever Cheltenham Festival win. Dynaste the pre-race favourite, took the lead with three to jump but could not hold on.
Twenty-four runners will go in the 4.40pm Fulke Walwyn Kim Muir Challenge Cup, run over an extended three miles and a furlong for amateur riders. Super Duty is Herbert's next best bet of the St. Patrick's Day Thursday.
At 13/2 odds, Super Duty is also the bookies' favourite.
Arabella Boy is Herbert's pick for the 5.15 Cross-Country Handicap Chase, rescheduled for this afternoon after being postponed from the opening day after sub zero temperatures left parts of the course frozen. Sixteen runners are confirmed for the three mile and seven furlong race.
The St. Patrick's Day Derby, a charity race for Cancer Research UK, will be run at 5.45.
