| 1 | A | B | C | D | E |
| --- | --- | --- | --- | --- | --- |
| 2 | List of world number one snooker players - Periods |  |  |  |  |
| 3 | No. | Nationality | Player | From | To |
| 4 | 1 | Wales | Ray Reardon | 3 May 1975 | 20 April 1981 |
| 5 | 2 | Canada | Cliff Thorburn | 21 April 1981 | 16 May 1982 |
| 6 | - | Wales | Ray Reardon (2) | 17 May 1982 | 2 May 1983 |
| 7 | 3 | England | Steve Davis | 3 May 1983 | 29 April 1990 |
| 8 | 4 | Scotland | Stephen Hendry | 30 April 1990 | 4 May 1998 |
| 9 | 5 | Scotland | John Higgins | 5 May 1998 | 1 May 2000 |
| 10 | 6 | Wales | Mark Williams | 2 May 2000 | 6 May 2002 |
| 11 | 7 | England | Ronnie O'Sullivan | 7 May 2002 | 5 May 2003 |
| 12 | - | Wales | Mark Williams (2) | 6 May 2003 | 3 May 2004 |
| 13 | - | England | Ronnie O'Sullivan (2) | 4 May 2004 | 1 May 2006 |
| 14 | - | Scotland | Stephen Hendry (2) | 2 May 2006 | 7 May 2007 |
| 15 | - | Scotland | John Higgins (2) | 8 May 2007 | 5 May 2008 |
| 16 | - | England | Ronnie O'Sullivan (3) | 6 May 2008 | 3 May 2010 |
| 17 | - | Scotland | John Higgins (3) | 4 May 2010 | 26 September 2010 |
| 18 | 8 | Australia | Neil Robertson | 27 September 2010 | 12 December 2010 |
| 19 | - | Scotland | John Higgins (4) | 13 December 2010 | 2 May 2011 |
| 20 | - | Wales | Mark Williams (3) | 3 May 2011 | 11 September 2011 |
| 21 | 9 | England | Mark Selby | 12 September 2011 | 4 November 2012 |
| 22 | 10 | England | Judd Trump | 5 November 2012 | 9 December 2012 |
| 23 | - | England | Mark Selby (2) | 10 December 2012 | 17 February 2013 |
| 24 | - | England | Judd Trump (2) | 18 February 2013 | 31 March 2013 |
| 25 | - | England | Mark Selby (3) | 1 April 2013 | 9 June 2013 |
| 26 | - | Australia | Neil Robertson (2) | 10 June 2013 | 5 May 2014 |
| 27 | - | England | Mark Selby (4) | 6 May 2014 | 6 July 2014 |
| 28 | - | Australia | Neil Robertson (3) | 7 July 2014 | 10 August 2014 |
| 29 | - | England | Mark Selby (5) | 11 August 2014 | 7 December 2014 |
| 30 | 11 | China | Ding Junhui | 8 December 2014 | 14 December 2014 |
| 31 | - | Australia | Neil Robertson (4) | 15 December 2014 | 24 January 2015 |
| 32 | - | China | Ding Junhui (2) | 25 January 2015 | 8 February 2015 |
| 33 | - | England | Mark Selby (6) | 9 February 2015 | 24 March 2019 |
| 34 | - | England | Ronnie O'Sullivan (4) | 25 March 2019 | Present |

Question: When was Stephen Hendry ranked world number one (and for how many seasons and were they consecutive or not) and did he ever reach number one again?
Answer: Stephen Hendry was ranked world number one for eight consecutive seasons between 1990 and 1998, and regained the top ranking position for the 2006/2007 season.