Bug/Issue: October 2024 movetext starts with "0...", with black's first move starting with "1. "
I'm not sure if this is a problem with the upstream Lichess game database or not, but while working with this data I noticed that the movetext in the October 2024 partition seems to be incorrect. The movetext of every game in that month starts with "0..." for white's first ply, and "1. " marks black's first ply. Haven't checked the entire dataset to see if there are any other month partitions with the problem but I know that at least November 2024 through April 2025 do not have it.
As @nfiekas pointed out, it's likely related to a bug that was fixed in the main db but not in the hf export by this commit: https://github.com/lichess-org/database/commit/bb54a07c3575969a5b37404c681becee834f299e
I'll re-export the data when I get a minute next week.
Thanks again for flagging!
@christopher thank you so much for all the work you do maintaining this data!
I ran a script to scan the rest of the data for any issues like this and found one more month that seems to be affected by the same issue: March 2018
Thank you so much for re-exporting these! Unrelated, but also thank you for changing the shard size to 1 GB. The scripts I run to preprocess and compress the data for my use case run way faster for the 2025 months than they did for comparable size months with smaller shard sizes, it's great!