Pawn_Fills - peregrineshahin/ChessProgrammingWiki GitHub Wiki
title: Pawn Fills
Home * Board Representation * Bitboards * Pawn Pattern and Properties * Pawn Fills
Samuel Bak - Unexpected [1] Pawn Fills are base of spans. They are used to determine closed, half-open and open files.
Filefill
The union of both front- and rearfills, leaves the complete file with at least one either white or black pawn on it. Since filefills have all ranks equal, they may treated as bytes, if it is about pure file sets.
U64 fileFill(U64 gen) {
return nortFill(gen) | soutFill(gen);
}
white pawns black pawns
. . . . . . . . . . . . . . . .
. . . . . . . . . 1 . . . 1 1 .
. . . . . . . . 1 . 1 . . . . 1
. . . . . . . . . . . 1 . . . .
1 . . . . 1 . . . . . . . . . .
. . 1 . . . . . . . . . . . . .
. 1 1 . . . 1 1 . . . . . . . .
. . . . . . . . . . . . . . . .
white filefill black filefill
1 1 1 . . 1 1 1 1 1 1 1 . 1 1 1
1 1 1 . . 1 1 1 1 1 1 1 . 1 1 1
1 1 1 . . 1 1 1 1 1 1 1 . 1 1 1
1 1 1 . . 1 1 1 1 1 1 1 . 1 1 1
1 1 1 . . 1 1 1 1 1 1 1 . 1 1 1
1 1 1 . . 1 1 1 1 1 1 1 . 1 1 1
1 1 1 . . 1 1 1 1 1 1 1 . 1 1 1
1 1 1 . . 1 1 1 1 1 1 1 . 1 1 1
Based on pawns, files are either closed, open or halfopen.
See also
- Fill Algorithms
- Half-open File
- Kogge-Stone Algorithm
- Open File
- Parallel Prefix Algorithms
- Pawn Spans
- Pawns and Files (Bitboards)
External Links
- Billy Cobham - George Duke Band - Juicy, YouTube Video
feat. John Scofield and Alphonso Johnson, Montreux Jazz Festival, July 6, 1976