Dann Corbit

The (E)xtended (B)ook (F)ormat

Project

 

 

Dann Corbit (left) and Les Fernandez (right) are the main contributor of the EBF project. When Dann saw the potential of the project he created a selection of his huge collection of analyzed positions and donated 111 million deep analyzed (20+ plies) positions in EPD format including best move, score and depth.

 

There are no typos in the above, Dann since decades analyzes positions with top-engines, about the contributed 111 million he said: You got the tip of the iceberg, but it should be the premium ice.

 

From his words I understood he must have more than half a billion analyzed positions, a life time work.

 

So a big thanks Dann and Les for making the top of your (life time) work available for public consumption.

 

A quick overview.

click to enlarge

click to enlarge

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DOWNLOADS

 

Source code - In case programmers want make use of EBF books.

Run demo.exe for a first impression.

Book

Positions

Size

Unzipped

Time

Engines

Depths

dc.ebf

111.239.168

782 Mb

1.2 Gb

Depth based

Diverse top engines

20 plies at minimum

dc.epd

111.239.168

1.2 Gb

7.8 Gb

 

 

 

 

 

 

 

 

 

 

Extracted EPD's

 

 

 

 

 

 

Queen promotions

63.435

 

 

 

 

 

Rook promotions

6.815

 

 

 

 

 

Bishop promotions

1.748

 

 

 

 

 

Knight promotions

2.613

 

 

 

 

 

 

 

 

 

 

 

 

Mate in x positions

89.610

 

 

 

 

 

Mate in -x positions

49.647

 

 

 

 

 

 

 

 

 

 

 

 

Pawn endings

243.776

 

 

 

 

 

Light piece endings

6.261.606

 

 

 

 

 

Rook endings

2.077.676

 

 

 

 

 

Queen endings

947.198