chess:programming:polyglot_book_format:castle
Chess - Programming - Polyglot Book Format - Castle
Castle is part of the Key
It is the exclusive or of entries from the RANDOM_CASTLE sub-array.
The offsets are computed as:
| Color | Castle Side | Offset |
|---|---|---|
| White | King-side Castle | 0 |
| White | Queen-side Castle | 1 |
| Black | King-side Castle | 2 |
| Black | Queen-side Castle | 3 |
NOTE: These flags are all true in the starting position and are only updated after the appropriate King, Rook or Castling moves.
- The default value for this field should be 0 if if none of these flags apply; i.e. then castle=0.
WARNING: Even though the flag may indicate that castleling can be done, a program should verify that a Castle-move is actually valid, as some mistakes may creep in.
chess/programming/polyglot_book_format/castle.txt · Last modified: 2022/01/11 13:54 by peter