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1. Notation

The game of Othello takes place on a board with 64 squares. We refer to these squares by a coordinate system: the rows are numbered from top to bottom by 1 to 8; the columns are indicated from left to right by 'a' to 'h'.

a b c d e f g h 1 a1 b1 c1 . . . . h1 1 2 a2 . . . . . . . 2 3 a3 . . . . . . . 3 4 . . . . . . . . 4 5 . . . . . . . . 5 6 . . . . . . . . 6 7 . . . . . . . . 7 8 a8 . . . . . . h8 8 a b c d e f g h |

The square at the top left is referred to as a1, the one immediately to its right as b1, and so on.

a b c d e f g h 1 . C . . . . C . 1 2 C X . . . . X C 2 3 . . . . . . . . 3 4 . . . . . . . . 4 5 . . . . . . . . 5 6 . . . . . . . . 6 7 C X . . . . X C 7 8 . C . . . . C . 8 a b c d e f g h |

Certain types of squares have been given, for reasons of convenience, a special name. One speaks of the corners (a1, h8, a8, and h8), the X-squares, which are those squares diagonally adjacent to a corner, and of the C-squares, which are the other squares adjacent to a corner. The compass directions are often used to refer to a region of the Othello board. For example, the squares near the a1 corner make up the "north-west" region while row 8 is referred to as the "south edge".

It is not necessary, in reading this booklet, to know how to record a game. However we give the process in case you would like to read a game analysis or record your own games. A game is recorded in a Diag. giving the number and location of each move.

a b c d e f g h 1 45 32 19 18 31 24 44 43 1 2 46 36 9 11 16 15 42 56 2 3 17 8 3 4 10 22 38 51 3 4 20 13 5 o x 6 23 40 4 5 21 14 7 x o 1 39 41 5 6 34 30 12 2 28 29 53 52 6 7 35 47 33 26 25 37 59 55 7 8 50 49 48 27 54 60 58 57 8 a b c d e f g h |

The Diag. above represents the game Penloup-Juhem game from the 1992 World Championships. The first player listed is black, here Penloup. The '1' on f5 indicates that the first move was played on this square; then white responded with d6, followed by c3 d3 c4 ...

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