---
license: lgpl-3.0
tags:
- chess
- cdb
pretty_name: Static dumps of chessdb.cn
viewer: false
---

# Static dumps of chessdb.cn (cdb)

This is a collection of static dumps of [chessdb.cn](https://chessdb.cn/queryc_en/), the largest online database 
of chess positions and openings. The dumps can be probed with the help of [cdbdirect](https://github.com/vondele/cdbdirect).

## Statistics

|                 |    20240814 |    20241114 |    20250608 |     20251115 |
| :-------------- | ----------: | ----------: | ----------: | -----------: |
| Positions       | 44262943988 | 46456113101 | 48454315961 |  53035759834 |
| Scored moves    | 88251700855 | 92617595285 | 96605581079 | 128743456819 |
| Size            |       821GB |       808GB |       846GB |        997GB |


<!--

Final count:          44262943988
  Have min ply:       28819025984
  Have single move:   35381149368
  Total scored moves: 88251700855

Final count:          46456113101
  Have min ply:       40646578967
  Have single move:   37095836123
  Total scored moves: 92617595285

Exact count:          48454315961
  Have min ply:       42635854870
  Have single move:   38668601698
  Total scored moves: 96605581079

Final count:          53035759834
  Have min ply:       49670372959
  Have single move:   34857596299
  Total scored moves: 128743456819
  
-->