Karnataka pacer Abhimanyu Mithun scalped six wickets, as the hosts bundled out Uttar Pradesh for 281 on the second day of their Elite Group B game.
Mithun (6-60), who had taken three wickets on the opening day, ran through their lower order to scuttle UP out for 281.
In reply, Karnataka openers Devdutt Padikkal (74 off 108 balls, 10x4) and Dega Nischal (36 off 90 balls; 4x4) conjured a strong 91-run stand for the first wicket.
However, later in the day, UP bowlers made inroads and left Karnataka teetering at 168/4 despite a strong opening stand by Karnataka openers, as the hosts still trail by 113 runs with six wickets in hand.
The fight today will be to grab the crucial first-innings lead.
In another game at Visakhapatnam, Test specialist Cheteshwar Pujara stuck a patient unbeaten half century against Railways for Saurashtra.
Pujara is batting on 69 off 136 balls with Arpit Vasavada (11 not out)as their side trails by only 37 runs after dismissing Railways for a paltry 248.
Andhra over Delhi
Ongole: Ricky Bhui cracked an unbeaten 70 to guide Andhra Pradesh to 249 for six against Delhi at stumps on day two of their Group A game.
Resuming at 16 for 2, Andhra rode on Ricky’s unconquered 164-ball 70 and some useful contributions from Manish Golamaru (42), skipper G H Vihari (38) and Karan Shinde (48) to take a first innings lead of 34 runs.
In other Group A matches, opener Abhishek Raman (110) scored a century while Manoj Tiwary (51) hit a fifty as Bengal reached 236 for 6 in reply to Kerala’s first innings score of 239.
Bengal thus trailed Kerala by just three runs with four wickets remaining in their first innings at stumps.
TN out for 96
Dindigul: Himachal Pradesh hit back strongly to bundle out Tamil Nadu for 96 and reached 133 for 7 in the second innings to seize the advantage at stumps on day two the Group B match.
At stumps, Himachal extended the lead to 195 runs.
Vaibhav Arora (3/21) was the best bowler for HP, while Rishi Dhawan (2/30), Mayank Dagar (2/17) and A P Vashist (2/22) chipped in with wickets.
Test star Ravichandran Ashwin (24) was the top-scorer with his 60-ball knock.
Haryana win big
Rohtak: Skipper Harshal Patel returned with career-best figures of 12 for 53 as Haryana inflicted an innings and 125 run defeat on Tripura inside two days in their group C match.
Patel followed his first innings effort of 7 for 29 with a five-wicket haul in the second, while his pace colleague Ashish Hooda also returned with figures of 8-3-21-5 as Tripura folded for 49 all out to hand Haryana seven points.
In Pune, Jammu & Kashmir shot out Maharashtra for 109 in the first innings and made 155 for 4 in the second innings at stumps on day two, to gain an overall lead of 255 runs.
Resuming at 51 for 3, Maharashtra was bundled out for 109 in 41.1 overs as medium-pacer Umar Nazir picked up five wickets.