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LIVE: Wu Yize 2-2 Mark Allen
Play temporarily halted after third frame because of power outage
Eight frames to be played in first session
John Higgins 4-4 Shaun Murphy, match continues at 10:00 BST on Friday
Semi-finals are best of 33 frames - first to 17 - and conclude on Saturday
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It seems from the sessions so far in these semi-finals that break-building will be the key. Owning the table and avoiding unforced errors will get you over the line. No-one has so far managed to get a run going.
Amanda, Merseyside
Wu 2-2 Allen
Mark Allen goes in-off for the second time in the frame and, even worse news for the former world number one, he's left a free ball.
Wu Yize pots the brown as an extra red, then goes brown again to leave himself a pot on the last red...
But he decides to lay a snooker.
On we go.
Allen goes in-off for second time in frame
Wu 2-2 Allen
Steven Hallworth
Snooker commentator on BBC Two
Rule number one in a situation like this has to be to get the object ball safe. If you can get both (cue ball and object ball) safe, that's a bonus.
Wu 2-2 Allen
Mark Allen can't pot a tough final red and he still trails by 21 points with 35 remaining.
An exchange of safety shots follows and, with where the colours are, whoever pots the last red is a strong favourite.
Wu 2-2 Allen
On a break of 28, Mark Allen misses a red with the rest.
He's still 33 points behind with 51 remaining.
Wu Yize pushes the boat out going for a plant that didn't look like it was ever on and suddenly Allen is back at the table with another chance.
Mark Allen misses after a series of confident pots
Wu 2-2 Allen
Ken Doherty
1997 world champion on BBC Two
It's very early days and there are going to be lots of twists and turns, but this could be one of them.
Wu 2-2 Allen
Ohhh, the eighth black does not drop and Wu Yize looks a bit disconsolate going back to his seat.
Not only is it a good chance for a 147 missed, he might not even win the frame.
Wu misses the black while on for 147
Wu 2-2 Allen
Ken Doherty
1997 world champion on BBC Two
The way the reds are positioned as well, no more cannons required here. Just keep a nice close rein on the cue ball and we could be in for something very special.
Wu 2-2 Allen
Six reds, six blacks for Wu Yize...
Wu 2-2 Allen
Not the best of starts after the interval for Mark Allen, who goes in-off when playing a safety shot.
He clearly wasn't happy with something immediately after he struck the cue ball and referee Marcel Eckardt asked the crowd to make sure phones were turned off.
Wu Yize has the first chance to score in frame five.
Wu 2-2 Allen
The players are back out at the Crucible Theatre for the next instalment of this semi-final.
Mark Allen and Wu Yize will play another four frames before the close of play this evening.
They both made two breaks above 50 in the opening four frames.
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Never seen Mark Allen play so well. Wu Yize's early lightning start seems to have galvanised him...
Tom, Walsingham
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Higgins is a master of match play, and a master at grinding out a tough session, and with the pressure at this stage at the Crucible, the longer and harder the match, the harder he is to beat. I think this might be his year!
Dominic, London
If you weren't with us earlier, a reminder that the first session between John Higgins and Shaun Murphy ended level at 4-4.
They will resume at 10:00 BST on Friday.
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As cute as the lambs were on BBC Two during the outage, I prefer the snooker!
Chris, Sheffield
All being well, that'll be the final disruption to the TV coverage of the evening...
Wu 2-2 Allen
Steve Davis
Six-time world champion on BBC Two
When the screens went blank at home, it was obvious in the room here that something had happened.
Lights went off and cameras stopped filming the players.
Mark Allen was aware that something weird had happened, and how good a performance to actually keep his standard up without getting confused by what was going on.
That's somebody who's on point at the moment.
Wu 2-2 Allen
All square at the interval.
Mark Allen bounces back well from losing the first two frames and it's 2-2.
Mark Allen levels with Wu Yize
Wu 2-1 Allen
Ken Doherty
1997 world champion on BBC Two
It's been a really entertaining four frames.
Wu 2-1 Allen
A simple black from Mark Allen means Wu Yize requires a snooker, and a thin cut on a red into the left corner means the Chinese player won't be coming back to the table.
Wu 2-1 Allen
Steven Hallworth
Snooker commentator on BBC Two
More than anything, this is sending a clear message to Wu Yize that he won't have it all his own way, that Mark Allen is up to the challenge and up for the task.
