Tool for reading or writing chess notations, including most famous FEN or SAN formats can be used to transcribe the movements of a game of chess.

Chess Notations - dCode

Tag(s) : Notation System

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A game of chess is a series of movements (moves) made by the players on the chessboard. In order to keep a history of a part, or to save a position, several notations, indicating the locations of the different parts and / or previous movements, are used.

Chess game moves are usually indicated with algebraic notation `SAN` (Standard Algebraic Notation), the official description system of the International Chess Federation. This system has an short version which is the most used. This is also the notation used in the PGN (Portable Game Notation) format.

The algebraic notation associates with each piece a letter:

Piece | Notation |
---|---|

King | K |

Queen | Q |

Rook | R |

Bishop | B |

kNight | N |

Pawn | nothing (or P) |

The principle of algebraic notation is to designate a move with the piece, its starting square and its destination cell. The 64 squares of the chessboard are marked with a coordinate system from the bottom left: the numbers `1` to `8` for the columns and the lowercase letters from `a` to `h` for the rows.

__Example:__ The square at the bottom left is named `a1`, the square at the top left is called `h1`, the square at the bottom right is called `a8` and the top right square is called `h8`

The abbreviated notation does not indicate the starting position because it is theoretically known.

__Example:__ A move of a king from the 1st square of the 1st row (column 1 = a, row 1) to the 2nd square of the 2nd row (column 2 = b, row 2) is written `Ka1-b2` or `Kb2` in short version.

When the chess play is a move, a dash `-` is indicated between the 2 squares, if it is a catch, it is noted `x`. In abbreviated version, only the `x` is noted.

__Example:__ `e2-e3`, abbreviated to `e3`, means: the pawn moves to `e3`

__Example:__ `e2xf3`, abbreviated to `xf3`, means: the pawn takes the piece located in box `f3`

White start, a move number is usually indicated before each movement of a white piece, the black move is indicated after the white one.

__Example:__ `1. e4 Cf62. d4 Nxe4`

Finally, a position where the king is in check is noted `+`, and `#` for checkmate.

To describe, at a given moment, the position of all the pieces of a chessboard, the FEN notation (Forsyth-Edwards Notation) is the most used.

On a single line, the positions of all the pieces as well as the possible rooks, the stroke number or the color of the next turn are described.

The FEN notation of the pieces is:

Piece | White | Piece | Black |
---|---|---|---|

K | King | k | King |

Q | Queen | q | Queen |

R | Rook | r | Rook |

B | Bishop | b | Bishop |

N | Knight | n | Knight |

P | Pawn | p | Pawn |

1-8 | N empty boxes |

The initial position of a classical chess game is described:

__Example:__ `rnbqkbnr / pppppppp / 8/8/8/8 / PPPPPPPP / RNBQKBNR w KQkq - 0 1`

rnbqkbnr | Rook (black), Knight (black), Bishop (black), Queen (black), King (black), Bishop (black), Knight (black), Rook (black) |

/ | Line separator |

pppppppp | 8 pawns (black) |

8 | 8 empty boxes |

PPPPPPPP | 8 pawns (white) |

RNBQKBNR | Rook (white), Knight (white), Bishop (white), Queen (white), King (white), Bishop (white), Knight (white), Rook (white) |

w | White turn |

KQkq | Castling (black) is possible king side (K) and queen site (Q) and the castle (white) is possible for king side (k) and queen side (q) |

- | Possible square coordinated for a catch en passant |

0 | Number of moves since last catch |

1 | Move number |

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