A record-breaking partnership between Phil Jaques and Alex Lees put Yorkshire firmly in the box seat on Day 1 at Chesterfield.
The duo piled on 311 runs for the second wicket as the visitors closed on 367-2 after winning the toss and electing to bat.
Mark Footitt grabbed the early wicket of Adam Lyth for ten, with a rising delivery that took the edge and flew through to wicketkeeper Tom Poynton.
But it proved to be a solitary success as Alex Lees and Phil Jaques added 129 in 23 overs to take lunch at 151-1, despite a tidy contribution of 6-2-13-0 from Derbyshire LV= County Championship debutant Peter Burgoyne.
Lees was first past 50, in 76 balls with 9 fours, closely followed by Jaques who reached the landmark in 68 deliveries – with six fours and a six – as Mark Turner’s seventh over cost 22.
Burgoyne continued to impress after the interval as his first spell as a Derbyshire Championship cricketer ended with very respectable figures of 23-6-42-0.
Both batsmen completed centuries, however, and the visitors moved onto 285-1 by the Tea interval. Lees passed three figures in 163 deliveries with 16 boundaries, closely followed by Jaques - for the first time since last May - off 174 balls, with 13 fours and a six.
After tea, records started to tumble as the duo’s stand passed 300 and beat a 103-year-old record for Yorkshire’s second wicket versus Derbyshire.
Lees reached his first career 150 in 248 balls, with 22 fours, before finally losing his partner when Jaques nicked the first ball of a Tim Groenewald spell to first slip with the score on 333.
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