• Fix missing Chinese Light tanks (WZ-132-1)
  • Fix misc bugs in calculations impacting update 9.6 stats too


  • Added stats for update 9.7.
  • The site tracks now nearly every active Blitz player. About 2M players play Blitz during an update across all the servers. The impact can be seen in overall WR distribution that shows mean WR being below 50% as it should. The impact on tank stats is minimal since the missing players were mostly inactive players. Large share of players play too few games during an update to really impact on the tank stats.


  • Added stats for update 9.6.
  • A MAJOR upgrade to the site’s “backend” responsible for fetching and managing the stats, exporting those to R. The new backend is based on:
    • Pydantic for data validation
    • Python multiprocessing for performance
    • Apache Arrow for larger-than-memory data support. The build pipeline can now automatically read only part of the data to the memory for processing. This scales to at least 10x data amounts vs. the previous pipeline.
  • The site tracks now nearly every Blitz player. Results of this will be seen in the next update’s data.
  • The 9.6 stats were published late due to large changes required to refactor the build pipeline for the new backend & file format, … and due to myself making a tiny-tiny copy-paste error which that cost me approx. 20h of work to recover from…


  • Added stats for update 9.5.



  • Major update. New simplified page hierarchy. I scrapped the update-level “tier” hierarchy and created players stats page and players at tier pages instead. I thougt this would have been a “small” thing, but it took days to fix all the broken hard-coded links (and update those to generated ones).


  • Added stats for update 9.4.


  • Added stats for update 9.3.


  • Added stats for update 9.2.


  • Added stats for update 9.1.


  • Added stats for update 8.10.


  • Added stats for update 8.9.


  • Added stats for update 8.8.


  • Added stats for update 8.7.


  • Added stats for update 8.6.


  • Added stats for update 8.5.


  • Added stats for update 8.4.


  • Added stats for update 8.3.


  • Added final stats for update 8.2.


  • Added final stats for update 8.1.
  • Fixed lot of build system bugs and built workarounds for out-of-RAM cases. 32GB RAM is running short with the amount of data…


  • Added bottom 20 Relative WR per player skill-level charts to tier X stats.
  • Added clarification of what “WR” is on player skill-level charts (=player WR at the tier in question).


  • Added final stats for update 8.0.
  • Added Relative WR stats for 55-65% and +65% player segments separately


  • Added final stats for update 7.9.


  • Added final stats for update 7.8.


  • Added preliminary stats for update 7.7.


  • Added preliminary stats for update 7.7.


  • Added preliminary stats for update 7.6.




  • Added preliminary stats for update 7.5.
  • Added links to tank-pages into stats tables


  • Added final stats for update 7.4.



  • Added preliminary stats for update 7.4. I have develop scripts to clean up the database so I can in the future release preliminary stats before the next update.


  • Added full stats for update 7.3. Just after I was proud to release preliminary stats for the first time, WG announced a new update. So the preliminary stats were served total three days. In the future I plan to release preliminary stats 2 weeks after an update.



  • Stats for update 7.2 are out. I finally managed to fix the parallel processing error (it was multi-threading, not shared memory issue). Debugging parallel code is PIA.


  • Stats for update 7.1 are finally out. After adding the tank-pages the site build time has grown 10x and I have been looking for parallel processing to speed up the work. But I have ran into weird issues likely related to shared memory limits causing the parallel build script to fail.



  • New tank-specific pages with lot of detailed information about each tank in comparison to the same tier/type tanks.
  • Hit Rate and average kills charts added to Tanks, Tanks per tier, Tanks of Type and Tank.





  • Stats added for update 7.0.
  • New pages for each tank type per tier have been added. These pages list all the tanks in the tier for each tank type.


  • Stats added for update 6.10
  • Also fixed a bug in the code (function params in wrong order..) that likely caused too many tank stats being filtered out.


Stats filtering unified to eliminate stock-grind tanks’ impact on tank performance stats (Averate WR, Relative WR, Average damage, etc.). Earlier new tanks got impacted by the stock-grind battles being taken into account. The number of required battle is a compromise based on average tank research XP divided by players’ average XP at the tier and divided by 1.5^2. This can be intepreted as playing with 50% WR and only the first 2x XP victories plus XP boosters. Making the filter too aggressive seriously limits the available data, therefore the compromise.

Required number of battles per tier


Relative WR formula revised to do the comparison to average of all the same tier tanks, including the tank itself. This seems to provide more sensible results than the earlier using other same tier tanks as the comparison point. Honestly speaking, I do not know why. The first algorithm seemed clever, but the detailed graphs showed it failed somehow.

The first Relative WR incarnation also had an error that while it filtered out stock-grind tanks, it included those in the calculation of the comparison WR (i.e. average WR of other same tier tanks). This caused RElative WR to be higher for all the tanks than it actually was.

2020-06-08 New blog post: Measuring tank performance

2020-05-16 Stats since update 6.0 added

Stats since Update 6.0 added. Graphs are also now based on plot templates to unify look’n’ feel.

2020-05-07 launched