Menu | Explaining level changesTom Archer v Kyle Piggins (Thu 04 Jan 2024)Match won by Tom Archer. Result: 15-9,15-6,15-9.Starting level for Tom Archer: 2,079, level confidence: 80%. Set manually. Starting level for Kyle Piggins: 810, level confidence: 25%. Tom Archer to win as he is currently playing 157% better than Kyle Piggins. Tom Archer won all of the games and 65% of the points. This games result would be expected if he was better by around 55% or more. This points result would be expected if he was better by around 88% (PAR scoring). These are weighted and combined to calculate that Tom Archer played 88% better than Kyle Piggins in this match. Due to the difference between the players' levels, allow for the likelihood that Tom Archer was taking it easy by anything up to 19%. This gives him an allowed level range for this match between 1,211 and 2,079 without affecting his level. In this case, Tom Archer played at level 1,595 and remained within his allowed range so his level will not be adjusted. On the assumption that Tom Archer would normally have been playing at level 1,675 (based on typical behaviour), Kyle Piggins played better than expected and therefore gains a pre-damping level increase of 5%. Allowing for the difference in level between the players, including some additional protection for the better player, the adjustments have been reduced to 0% and 3.1% respectively. Factoring in the relative levels of confidence which allows players with low confidence in their levels to change more quickly, the adjustment for Tom Archer changes to 0% and Kyle Piggins changes to +3.1%. After applying standard match damping, the adjustment for Tom Archer becomes 0% and for Kyle Piggins becomes +3%. Apply match/event weighting of 50% for 'Ickleford Boxes' so the adjustment for Tom Archer is 0% and for Kyle Piggins is +1.5%. Increase level confidence due to one more match played. Tom Archer: 90%, Kyle Piggins: 50%. Reduce level confidence based on how unexpected the result is. Tom Archer: 77%, Kyle Piggins: 43%. 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 Tom Archer: 2,076, level confidence: 77%. Final level for Kyle Piggins: 821, level confidence: 43%. Notes
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