Thus, in this context Rb3 refers to moving the rook on b7 to b3. Moving it to b3 whould be an illegal move. It means that either of the two rooks is constrained by a pin: ie moving the rook would put the white king under attack.įor instance, if the white king is at a1 and the black queen is on c3, then the rook on b2 is pinned and If both rooks are unconstrained the move should have be recordes as either R2b3 or R7b3. On a board with white rooks on b2 and b7 a move noded by Rb3, could refer to either of the rooks moving to this square. The non-interface predicate implementing this is: chess_dict_move_pin/3.ĭisambiguation is needed in the following example. To disambiguate between multiple pieces that maybe able to be refered to by a game move, the pack implementsĪ pinned piece logic. Represented by a pgn(Info,Moves,Res,Orig) term (see pgn/2). pgn file to a Prolog terms list, where each game is This pack implements a parser for PGNs ( pgn/2) that converts the games in the. In most cases a single PGN file will contain all the games a particular chess tournament.įor example the file pack(chess_db('data/pgn/4NCL-2017.pgn') records some of the games for the 2017, 4NCL league taking place in the UK. pgn extension, may contain multiple games.
PGN CHESS GAMES DATABASE PORTABLE
Portable Game Notation is the standard for recording chess games. Listens to: chess_db( info) trigger light reporting across the library chess_db( move) chess_db( moves) chess_db( original) chess_db( true) (on-by-default channel, turn off for silent operation) PGNs Please note that this is more generic than chess_db_opening/2 as it also finds transpositions. ?- chess_db_position(, Handles, Conts ). View the two games in a PGN interface program such as:įind continuations for specific positions ?- PgnF = 'short/french.pgn', chess_db_opening_pgn(, PgnF ).
Moves are matched to game_move/4 and are pulled from the game_orig/2 sub-database. % Handles already exist, for chess_db directory: '/home/nicos/short'Ĭreate a new PGN file from the original scripts of the two French defence 2 games in their original script. Interrogate all connected databases for games starting with the sequence (French defence). ?- chess_db_connect( short, profile(false) ). The database is closed after it is populated. The DB will be populated with games from pgn file chess_db/data/4ncl_short.pgn Turn debugging of writing out the original games as they are added to the database.Ĭreate a database in fresh directory short/. Linux> chessx short/french.pgn Mini tutorial % open file short/french.pgn on program that can play the games eg % (short) Writing 1.e4,e6 starting games to: 'short/french.pgn' % (short) Following games start with 1.e4,e6 % Using existing chess_db directory: /home/nicos/short % creates a new pgn file from the base for the 2 games in short/ that start with e4,e6 % and displays the game ids for games that start with (French defence) % creates a chess_db in subdirectory short/ from data/4ncl_short.pgn OperationsĪre implicit to all open databases.
PGN CHESS GAMES DATABASE CODE
The pack includes code to: parse PGN's: pgn/2 store the parsed terms into prosqlite databases: chess_db/2 interact with the resulting databases: chess_db_game_info/3, chess_db_opening_pgn/2 dictionary representation of chess games: chess_dict_start_board/1, chess_dict_move/3 integer representation of game positions: chess_dict_inpo/2 logic for identifying pinned pieces (used in move disambiguation)Ī number of chess databases can be connected at the same time. The source code for the pack is available at github: Dependencies At this page search for the term: chess_db. % Which will open a browser pointing to the doc server. The best way to view the documentation is via the SWI-Prolog html documentation server: There are three example pgns in pack(chess_db/data/pgn) and an example program in pack(chess_db/examples/). Ideally we want to hook this pack to either a web-based interface, or (b) have an engive interface to exploit GUI playing programs, for playing the games as we select them.Ĭurrently selected games can be saved to a PGN file and be displayed with any PGN displaying program. Once connected to a number of chess_db databases, information about the gamesĬan be interrogated. Predicates for manipulating these databases. This library produces chess games databases from PGN files and provides some chess_db.pl - PGN and chess game databases. Chess_db.pl - PGN and chess game databases.
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