Adam Lyth’s sixth century of the County Championship Division One season helped Yorkshire take another significant step towards their first title in 13 years.
Lyth (122) underpinned his team’s 319 for four on day one at Trent Bridge against their closest pursuers Nottinghamshire, keeping the White Rose 28 points clear with only this match and one more to go.
Lyth and his fellow left-handed opener Alex Lees (86), so prolific together all summer, shared a stand of 176 after Joe Root had won the toss.
Root and Jonny Bairstow both failed as Yorkshire suffered a minor late wobble against the second new ball.
But Gary Ballance finished the day 82 not out as Yorkshire finished the day strongly against their rivals.
Nottinghamshire had their chances, though, dropping both Lyth and Lees early on - Lyth on 0, by home captain Chris Read behind the stumps to the second ball of the match.