# What's New?

This is Arasan 25.2, released in July, 2025.

Changes in Arasan 25.2:

1. Updated network, trained with 12B positions, using factorization and cosine LR scheduler
2. Training script and training log commited to repo, along with the network
3. Some changes to selfplay utility. Outputs W/L/D statistics now.
4. Fixes to non-SIMD build
5. Fixes for AVX512 build
6. Use -DSIMD, -DSSE2 for GUI build
7. Fixes for position learning. Rename "Learning file name" option to "Learning file."
8. use -path for xboard BookPath option
9. Fixes for loading/storing PGN files from the GUI
10. Fixes for setting ARASAN_VERSION macro in the build
11. Fix "bench" command so if given on the command line, it does complete initialization
12. Implement finny tables to speed up eval
13. Changes to book selection logic. Book will play a wider variety of moves by default.