Video caption: Ryan Day hits 'absolutely perfect' 145 breakRyan Day hits 'absolutely perfect' 145 break
Ryan Day hits the highest break of the World Championship so far, 145, in the final frame of the first session of his first round match against Anthony McGill to take a 6-3 lead.
When can I watch today?
All times are BST and subject to late changes
Full BBC TV and online listings for day six of the World Snooker Championship.
Live coverage
13:00-18:00, BBC Two
13:00-18:00 & 19:00-23:00, BBC Red Button
Tables One & Two, 13:00-18:00; 19:00-23:00, Connected TV and online
Highlights
23:15-00:05, BBC Two
Extra
00:05-02:05, BBC Two
Replays
18:00-19:00, BBC Red Button
What is it?
The World Championship is snooker's biggest event and has been staged since 1927. It has been hosted in its modern form by Sheffield's Crucible Theatre since 1977.
It is one part of snooker's 'Triple Crown' events alongside the UK Championship and the Masters.
The event has seen some of the biggest names in snooker throughout the decades win the trophy, including Stephen Hendry (seven titles) and Ronnie O'Sullivan (five titles).
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Get Inspired: How to get into snooker
Whether you choose to play competitively or socially, snooker is sure to get your brain working.
It requires skill and concentration and will improve your focus and hand-eye coordination.
Anyone can play regardless of age, gender or ability and it's not an expensive sport to get into.
Snooker is essentially a simple sport, once the rules of the game have been learnt - to do just that click here.
Video content
Video caption: Get Inspired: How World Snooker is helping build confidence in the communityGet Inspired: How World Snooker is helping build confidence in the community
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All times stated are UK
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Video caption: Mark Allen's flukey treble wins frameMark Allen's flukey treble wins frame Video caption: Ryan Day hits 'absolutely perfect' 145 breakRyan Day hits 'absolutely perfect' 145 break 
Getty ImagesCopyright: Getty Images Video caption: Get Inspired: How World Snooker is helping build confidence in the communityGet Inspired: How World Snooker is helping build confidence in the community
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Day hits 'absolutely perfect' 145 break
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Ryan Day hits the highest break of the World Championship so far, 145, in the final frame of the first session of his first round match against Anthony McGill to take a 6-3 lead.
When can I watch today?
All times are BST and subject to late changes
Full BBC TV and online listings for day six of the World Snooker Championship.
Live coverage
13:00-18:00, BBC Two
13:00-18:00 & 19:00-23:00, BBC Red Button
Tables One & Two, 13:00-18:00; 19:00-23:00, Connected TV and online
Highlights
23:15-00:05, BBC Two
Extra
00:05-02:05, BBC Two
Replays
18:00-19:00, BBC Red Button
What is it?
The World Championship is snooker's biggest event and has been staged since 1927. It has been hosted in its modern form by Sheffield's Crucible Theatre since 1977.
It is one part of snooker's 'Triple Crown' events alongside the UK Championship and the Masters.
The event has seen some of the biggest names in snooker throughout the decades win the trophy, including Stephen Hendry (seven titles) and Ronnie O'Sullivan (five titles).
Get Inspired: How to get into snooker
Whether you choose to play competitively or socially, snooker is sure to get your brain working.
It requires skill and concentration and will improve your focus and hand-eye coordination.
Anyone can play regardless of age, gender or ability and it's not an expensive sport to get into.
Snooker is essentially a simple sport, once the rules of the game have been learnt - to do just that click here.
Video content