End Game Table Bases
What are they?
An End Game Table Base is a database that contain perfect knowledge about every chess game that ends with a given number of pieces. The database knows if each move will result in a draw, or the minimum number moves until checkmate. A full 6 man set of table bases can run upwards of 2 TB.
GaviotaProbe.NET
The creator of the Gaviota Chess Engine, Miguel Ballicora, created his own 5-man End Game Table Base format and made the probing code available under the MIT license. It uses the 7Zip compression library for which there is ample C# support. GaviotaProbe.Net is a C# implementation of the original Gaviota probing library. It uses the same cp4 compressed table base format as the C++ version so there is no need to generate new table base files.
EGTB Files
The complete set of Gaviota 5-man End Game Table Bases in a 6.5 Gig zip file is hosted here by the Pwned developers. These files were originally generated by Josh Shriver. If you don't need the entire set of tables, you can get individual cp4 files. If you want to generate your own table bases, Miguel's site explains how to do this.
EGTB Files included in Pwned
The maximum size limit for a game on Xbox Live Indie Games Channel is 500 Megs so there is only a partial set of table bases included. This is a list of the table base files you get in the Xbox version.
- kbbpk 66 MB
- kbbkp 65 MB
- kppkn 47 MB
- kppkp 43 MB
- kppkb 36 MB
- kbbkq 35 MB
- kbnkn 30 MB
- kbbkn 28 MB
- kbbnk 24 MB
- kbnkb 22 MB
- kbbkr 8 MB
- kpppk 8 MB
- kbbbk 7 MB
- knnkb 3 MB
- knnkn 3 MB
- kqkp 2 MB
- krkp 2 MB
- kbpk 1 MB
- knpk 1 MB
- kqpk 1 MB
- krpk 1 MB
- kpkp 1 MB
- knkp 1 MB
- kqkr 1 MB
- kbkp 1 MB
- kqkn 985 kb
- kqkb 913 kb
- kbnk 836 kb
- kppk 650 kb
- kqkq 603 kb
- krnk 589 kb
- krbk 568 kb
- krkn 547 kb
- kqbk 478 kb
- kqnk 454 kb
- kqrk 420 kb
- krkr 409 kb
- krkb 336 kb
- kbbk 296 kb
- krrk 222 kb
- kqqk 201 kb
- kbkb 145 kb
- knkn 140 kb
- kbkn 138 kb
- knnk 54 kb
- kpk 26 kb
- krk 10 kb
- kqk 9 kb