CHESSCORPUS
CHESSCORPUS · WEB 0.3.155
THE DATABASE AT A GLANCE

Find players. Find their weaknesses.

Updated 14 September 2026
10.957.719games
414.050players
497.462tournaments
6sources
5,8 GBindexed collection
Find players

Type a name and open their profile: games, opponents, tournaments and rating history.

  • FIDE profile with rating history
  • Repertoire tree by colour
  • PGN download
Open →
Explore positions

Move the pieces and see what is actually played in that position, and with what results.

  • Continuations and percentages
  • Trend over recent years
  • Sample games
Open →
PROVENANCE

How much each source contributes

10.957.719 games
01

Ajedrez Data AJ-OTB

3.746.68234.2 % of the total · over the board

3,746,682 games from Ajedrez Data AJ-OTB. Attribution and declared provenance are preserved; the source conditions are detailed on the credits page.

02

Chess Database · Figshare

3.539.94732.3 % of the total · over the board

3,539,947 games from Chess Database · Figshare. Attribution and declared provenance are preserved; the source conditions are detailed on the credits page.

03

ICCF - AjedrezData AJ-CORR

1.636.23214.9 % of the total · correspondence

1,636,232 games from ICCF - AjedrezData AJ-CORR. Attribution and declared provenance are preserved; the source conditions are detailed on the credits page.

04

Lichess Broadcast

1.118.02510.2 % of the total · broadcasts

1,118,025 games from Lichess Broadcast. Attribution and declared provenance are preserved; the source conditions are detailed on the credits page.

05

Lichess Titled Arena

806.8337.4 % of the total · online

806,833 games from Lichess Titled Arena. Attribution and declared provenance are preserved; the source conditions are detailed on the credits page.

06

Chess-Results

110.0001 % of the total · over the board

110,000 games sourced from public tournament PGN files on Chess-Results. Tournament attribution and declared provenance are preserved.

Mixed sources are counted once, so the total matches the public database.

DATA AND LICENCES

Not just a games database.

Chesscorpus is a platform: beyond the games (whose provenance is in the section above), here are the third-party data and software that power the trainers and analysis. The full detail is on the credits page.

Puzzles · Lichess Puzzle Database

The tactics-trainer puzzles come from the Lichess Puzzle Database, released as CC0 (public domain). Included with no attribution requirement.

Chess engine · Stockfish

All moves and evaluations are computed by Stockfish (GPLv3), which runs in your browser. Its licence and source ship in the /stockfish folder.

DATABASE HISTORY

The database, month by month.

A short summary of each release: size, games, tournaments and relevant changes.

Milestones from +1,000 games

No published milestones yet.