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Login: | Explaining level changesDivision 2: University of Bath Ladies B v University of Bristol Beasts (Thu 19 Oct 2023)Match played between Lucy Buckley (home) and Louise 'Formally' Hawkins (away).Match won by Lucy Buckley. Result: 15-3,15-7,15-6:15-1,15-5,15-4:15-5,13-15,15-10,12-15,15-8:15-3,15-4,15-4. Starting level for Lucy Buckley: 458, level confidence: 77%. Set manually. Starting level for Louise 'Formally' Hawkins: 172, level confidence: 58%. Lucy Buckley to win as she is currently playing 166% better than Louise 'Formally' Hawkins. Lucy Buckley won all of the games and 74% of the points. This games result would be expected if she was better by around 55% or more. This points result would be expected if she was better by around 181% (PAR scoring). These are weighted and combined to calculate that Lucy Buckley played 181% better than Louise 'Formally' Hawkins in this match. Assuming that any level changes are shared between both players, for this result it looks like Lucy Buckley actually played at a level of 471 and Louise 'Formally' Hawkins at a level of 167. Without any damping, both players would need to be adjusted by 2.8% to match this result. Allowing for the difference in level between the players, including some additional protection for the better player, the adjustments have been reduced to 1.3% and 1.7% respectively. Factoring in the relative levels of confidence which allows players with low confidence in their levels to change more quickly, the adjustment for Lucy Buckley changes to +1% and Louise 'Formally' Hawkins changes to -1.7%. After applying standard match damping, the adjustment for Lucy Buckley becomes +1% and for Louise 'Formally' Hawkins becomes -1.7%. Apply match/event weighting of 75% for 'Womens Autumn 2023/2024' so the adjustment for Lucy Buckley is +0.8% and for Louise 'Formally' Hawkins is -1.3%. Increase level confidence due to one more match played. Lucy Buckley: 88%, Louise 'Formally' Hawkins: 76%. Reduce level confidence based on how unexpected the result is. Lucy Buckley: 86%, Louise 'Formally' Hawkins: 74%. A final adjustment of +0.1% has been made to both players as part of the automatic calibration that is performed after each match. All players in this pool will have been adjusted equally in order to remain equivalent to other player pools. Final level for Lucy Buckley: 462, level confidence: 86%. Final level for Louise 'Formally' Hawkins: 170, level confidence: 74%. Notes
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