Former world champion Sean Murphy moved to 7-2 progressing after the first round of his match in the first round against Daniel Wales for the first time in the round.
In a high-quality session, 42-year-old Murphy won-with the goal of winning the second world title 20 years after his first success-four consecutive tires to control.
It needs to win only three other tires when the match will resume on Wednesday morning (10:00 GMT).
Murphy won the Master in January and looks forward to becoming the first player since Trump's quality in 2018-19 to win that tournament and the world championship in the same season.
It started a good start with a 64th break, but Wilcheman Wells, who had to fight through three qualified rounds to secure his place in the 17 -day annual event, showed his ability to build with a cleansing of 131.
But Murphy made rest periods from 63, 100, 57 and 138 to move to the dominant 5-1 feature.
Wales, 36, has achieved his second century with 109 in the seventh framework, only for Murphy to restore his four -frame progress with the 76th race.
The lost lions are expelled off the spot the opportunity to reduce its arrears in the final framework of the session, with Murphy benefiting with a break 89.
Jude Trump number one in the world began his campaign on Tuesday and occupies 6-3 progress against Chu Yuilong in a match concluding on Wednesday night (19:30 GMT).
The 93, 61, 117 and 62 Trump rest raised 5-1 before Chu, thirty-third in the world, in the seventh framework, which lasted for more than 40 minutes.
The couple shared the last two frames to leave Trump that needed four tires on Wednesday.
