AscentStats
Welcome to AscentStats
We build statistical models and software tools for climbing analytics.
🏆 Bern 2025: Heartbreak and historic breakthroughs
The Bern World Cup delivered unforgettable drama:
- Yufei Pan's emotional maiden gold - first Chinese man to win Boulder World Cup
- Dohyun Lee's semifinal masterclass (99.8 pts) couldn't save him from 4th in finals
- Big Three update: 10 of 15 medals (67%) - Anraku (5), Schalck (3), Lee (2)
- Erin McNeice makes history as first British woman to win in multiple disciplines
- ELO tracker: Anraku maintains historic pace at 3056
Competition climbing data science
We have analysed the last 18 years (2008-2025) of IFSC bouldering competitions using a full Bayesian dynamic Bradley-Terry model to find out which climbers are the most skilful, and which boulder problems have been the most difficult. Check out our analyses and elo rankings for climbers and routes here.
Recent Posts
Bern 2025: Heartbreak and breakthroughs as Pan claims maiden gold
Dohyun Lee's semifinal masterclass couldn't translate to gold as Yufei Pan's emotional breakthrough victory reshapes the men's standings. Meanwhile, Erin McNeice makes history as the first British ...
Prague 2025: Ondra's farewell, French triumph, and the hardest boulder ever set?
Adam Ondra's emotional goodbye meets the potentially hardest competition boulder ever set. Meanwhile, Mejdi Schalck ends Sorato's golden run as the Big Three continue their dominance.
The new era: 2025's historic IFSC boulder season
The 2025 IFSC Boulder World Cup season has already delivered some of the most remarkable performances in competition climbing history.
FlashGrade
FlashGrade is a mathematical grading system for climbers! It leverages probabilistic data modeling to accurately assess the skill level of climbers based on their ascent data.
Adam Ondra’s bouldering flash grade
We applied the flash grade model to Adam Ondra’s bouldering ascent data on 8a.nu. Check out the results.
FlashGrade tool
We have developed a simple experimental tool that allows climbers to input their ascent data (from thecrag.com) and estimate their climbing ability. Currently it only uses the simple Bradley-Terry model, but a version that uses the dynamic Bradley-Terry model is under development.
Cumulative Performance Grade
The cumulative performance grade is a universal index of climbing performance over multiple ascents that weights each ascent proportional to the expected difficulty compared with other ascents.
Explore our website to stay updated on the latest developments in climbing analytics.