Track the evaluations of the most common openings in the
ECO
on chessdb.cn (cdb).
The file all.tsv was downloaded from
lichess-org/chess-openings
in May 2025, and the epd fields were stored (in the original order)
in eco.epd.
The file eco_cdbpv.epd
contains the current cdb evaluations and PVs for each opening. It is created
daily with the help of the script cdbbulkpv.py from
cdblib, and the obtained statistics
are written to ecotrack.csv.
Moreover, each day the hundred positions with the currently shortest PVs on cdb
(ignoring PVs ending in a two-fold repetition)
are written to eco_daily_shortest.epd, and
the positions with absolute evaluations in the interval [90, 105]
are written to eco_daily_edgy.epd.
The following graphs attempt to measure the progress cdb makes in exploring
and evaluating the positions in eco.epd. See
caissatrack
for a precise description of the plotted indicators.
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.