GBR Code

The GBR code or Guy-Blandford-Roycroft code is a system of representing the pieces on the board in a chess position. Publications such as EG use it to classify endgame types and to index endgame studies.

In the GBR code, every chess position is represented by six digits, in the following format:

abcd.ef

  • a = queens
  • b = rooks
  • c = bishops
  • d = knights
  • e = white pawns
  • f = black pawns

For the first four digits, each white piece counts as 1, and each black piece counts as 3. Thus, for example, if White has two knights and Black has one knight, numeral d = 1 + 1 + 3 = 5. If that is all the material other than the kings, the position is classified 0005. Values 0 through 8 represent all normal permutations of force; 9 is used if either side has promoted material.

The last two digits of the code represent the number of White and Black pawns, respectively.

Read more about GBR CodeUsage, Examples of GBR Code

Other articles related to "gbr code, gbr":

Examples of GBR Code
... White material Black material GBR class KQ K 1000 KR K 0100 KB K 0010 KN K 0001 KNN K 0002 K KN 0003 KN KN 0004 KNN KN 0005 K KNN 0006 KN KNN 0007 KNN KNN 0008 KNNN ...

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