Chase, playing only his second Test match, joined three illustrious West Indies players -- Sir Garfiled Sobers, Collie Smith and Dennis Atkinson -- who scored a century and claimed a five-wicket haul in same test.
The tall batsman, who took five for 121 in India's first innings, was batting at 112 along with his skipper Jason Holder (21) at the tea break.
Chase put on 144 runs with Dowrich for the sixth wicket after a raising a 93-run stand with Blackwood in the opening session as they now lead by 15 runs with one session to go.
Post-lunch, Chase and Dowrich looked to bat on for time, but they were not subdued. They looked to attack the Indian bowlers who erred in line and length.
First up, Dowrich reached his third Test fifty off 78 balls and in doing so brought up the 100-partnership with Chase off 162 balls. The West Indies' 250-mark also came up within an hour's play, in the 54th over.
He had skipper Holder for company, and by tea time the two weren't looking uncomfortable at the crease at all as the West Indies crossed the 300-mark in the 79th over.
India did take the new ball immediately after the 80th over, but that too didn't provide them any breakthroughs, as the hosts negated the lead and went ahead thereafter. There are now 29 overs remaining in the match, for the visitors to force a result.
The visitors started off with Mohammed Shami (2/63) and Amit Mishra (2-85), but Blackwood attacked them both and hit them out of the attack.
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It didn't work as Blackwood smacked his second fifty in the Test off only 41 balls, bringing it up in the 31st over as 79 runs came in the first hour's play. West Indies also crossed the 100-mark earlier in the 25th over.
Blackwood hit a straight six in his second over but Ashwin got his revenge as he squeezed the batsman for runs bowling from round the wicket. The plan worked and Cheteshwar Pujara too a brilliant diving catch at forward short leg in the 34th over to send Blackwood back to the pavilion.
The Indian bowling didn't really trouble the duo as they brought up the 50-partnership off 82 balls, and the 200-mark came up for the West Indies in the 50th over. Yadav and Shami did get the ball to reverse later in the session, but couldn't get another success before the lunch break as the two batsmen looked comfortable at the crease.
