{"metadata":{"id":"improvement-by-solve-count","title":"Improvement after 100, 500 and 1,000 solves","question":"How much do speedcubers improve after hundreds of solves?","source":"SupaKewber practice data","sample_unit":"eligible user milestones","definition":"Baseline is a user\u2019s mean of solves 1\u201320. Milestone performance is the mean of the 20 solves ending at solve 100, 500 or 1,000. Improvement is the percentage reduction from baseline.","methodology":"Valid solves are ordered independently for each user and timing mode. Each milestone compares two 20-solve windows to reduce the influence of a single result.","inclusion_rules":["Only completed 3\u00d73 solves between 3.00 and 120.00 seconds are included.","DNFs, +2 penalties, deleted solves and structurally invalid stage timestamps are excluded.","No username, solve ID, scramble, move sequence or individual result is published.","Users must reach the full milestone in one timer mode."],"exclusion_rules":["Users below the milestone","Mixed manual and smart-cube sequences","Milestones below 20 eligible users"],"privacy_rule":"Public SupaKewber cells require at least 20 distinct users and 100 observations unless the dataset contains no account identifier, in which case at least 100 observations are required.","last_updated":"2026-10-09","stable_page_url":"https:\/\/supakewber.com\/research\/improvement-by-solve-count\/","json_url":"https:\/\/supakewber.com\/speedcubing-data\/downloads\/improvement-by-solve-count.json","csv_url":"https:\/\/supakewber.com\/speedcubing-data\/downloads\/improvement-by-solve-count.csv","publication_status":"collecting","sample_size":null,"contributing_users":null,"date_range":null,"threshold_message":"This dataset is collecting observations and will publish automatically after its privacy and stability threshold is reached."},"data":[]}