Track the evaluations of the book
UHO_Lichess_4852_v1.epd from
official-stockfish/books
on chessdb.cn (cdb).
The book contains 2632036 unique positions in total. They all arose as positions
from human games on Lichess in 2023, at a depth of
between 2 and 16 plies.
On cdb they have an average depth of 13.3 plies, as well as 30.6 pieces on
average. No position has fewer than 23 pieces on the board.
The file uho_cdbpv.epd.gz is created regularly
with the help of the script cdbbulkpv.py from
cdblib, and the obtained statistics
are written to uhotrack.csv.
The following graph attempts to measure the progress cdb makes in exploring
and evaluating the positions in uho.epd. See
caissatrack
for a precise description of the plotted indicators.
If you want to help improve the coverage of these positions on cdb, you could
manually or systematically explore them on chessdb.cn. As an example for an automated solution for the latter, you could
run the script launch_uho_daily.sh
automatically via .crontab entries of the form
@reboot sleep 20 && /path_to_script/launch_uho_daily.sh
55 6 * * * cd git/uhotrack && git pull
where the second entry is really only needed for server-like machines that run 24/7.
To discuss anything cdb related, and to help cdb grow at a healthy pace, join other (computer) chess enthusiasts at the chessdbcn channel on the Stockfish discord server.