Yorkshire had to settle for a draw at Headingley on the final day of their Division Two tussle aganst Derbyshire.
A pulsating first half-hour's play had seen table-topping Derbyshire follow-on 152 runs adrift and two quick wickets for Tim Bresnan put Yorkshire on course for victory.
But Usman Khawaja led a spirited fightback in the last two sessions with a sparkling unbeaten 110 to help the visitors to 190-5, 38 ahead, and bring about the stalemate.
Derbyshire resumed on 233-8, requiring a further 38 to avoid batting again, but David Wainright (50) was run out and Tim Groenewald (21) was caught behind off Bresnan and Yorkshire skipper Andrew Gale enforced the follow-on.
Bresnan was on the money again early in Derbyshire's second innings, removing Wayne Madsen and Matt Lineker to leave the visitors wobbling on 18-2.
Wes Durston (39) put on 90 with Khawaja until he was trapped lbw to Patterson and Dan Redfern fell soon after to make it 111 for four.
Ross Whiteley (17) held things up until he was caught by Gale and soon after the sides called it off with 14 overs remaining in the day.
Ryan Sidebottom took three wickets and Azeem Rafiq two as Yorkshire pushed to enforce the follow-on on day three of their County Championship clash with table-toppers Derbyshire at Headingley.
The visitors eventually closed on 233-8 which left them 187 runs in arrears and requiring a further 38 to make Yorkshire bat again.
Resuming on 28-1 in the morning session, Derbyshire lost three quick wickets as Sidebottom and newly-signed wicketkeeper Andy Hodd combined to superb effect to send Usman Khawaja, Matt Lineker and Dan Redfern back to pavilion.
At 42-4 Derbyshire were wobbling, but Wesley Durston (84) led a fine counter-attack and was ably supported by Ross Whiteley (35) as the duo put on 112 before the former became the first of Rafiq's two victims.
Whiteley produced another good alliance with David Wainwright before being removed by Steve Patterson, eding behind to give Hodd his fourth catch of the innings.
Rain then ensured 25 overs of play was lost, but Yorkshire gave themselves renewed hope of enforcing the follow-on as they picked up the late wickets of Tom Poyton and Tony Palladino to leave the visitors eight down, although Wainwright (45 not out) continued to defy them.
Anthony McGrath's 35th first-class hundred helped Yorkshire claim maximum batting points against Division Two table-toppers Derbyshire at Headingley.
The former Tykes captain hit 104 from 189 balls, including 18 fours and a six, to help the hosts amass 420 before they were finally bowled out on day two.
Opener Adam Lyth and Gary Ballance also weighed in with runs in a crucial game in the battle for promotion, the pair carrying their overnight stand to 116 before the the former fell to Ross Whiteley for 93.
Ballance was next to go for 79 and Adil Rashid only added 12, but McGrath and debutant Andrew Hodd, signed on loan from Sussex to cover for England international Jonny Bairstow, shared a 131-run alliance for the sixth wicket.
Wes Durston dismissed both in the same over, Hodd the second to go for a well-made 58, and the spinner went on to record final figures of 5-34.
Derbyshire had to face 11 overs before the close, enough time for Tim Bresnan - released from England duty in the morning - to remove skipper Wayne Madsen lbw. The visitors reached the close on 28-1.
Yorkshire made a sound start with the bat on day one of their LV=County Championship clash with Division Two promotion rivals Derbyshire before rain ended play for the day just one delivery after the lunch interval.
Put in to bat by leaders Derbyshire, Yorkshire scored at over a run-a-minute to finish the day on 127-2 with opener, Adam Lyth, unbeaten on 60.
Having won the toss and inserted their opponents, Derbyshire no doubt hoped that the humid conditions would assist their fast bowlers and were rewarded when, in only the fourth over, Phil Jaques shouldered arms and was comprehensively bowled by Tim Groenewald.
Skipper, Andrew Gale, was off the mark with a first-ball boundary, but runs were generally scarce for a while as Groenewald and Antonio Palladino were treated with respect.
But gradually the two left-handers began to assert themselves with Gale particularly strong on the leg side, while Lyth rarely looked in any trouble and the second wicket pair moved Yorkshire confidently to the 50 mark in the 14th over, the fifty stand soon following.
But when the partnership was worth 87 Gale departed, the Yorkshire skipper going for 47 from 69 balls after top-edging a pull off Ross Whiteley, with Mark Turner positioned under the catch at fine-leg.
Lyth brought up a faultless half-century, which contained seven boundaries, off 77 deliveries and he reached 60 after steering the first ball after lunch from Palladino to the rope, but persistent rain then swept in.