the squares of a checkerboard are numbered from 1 to 50

to note a blow: the number of the starting square of the piece followed by the number of the square of arrival of this piece

these two numbers are separated by a hyphen “-” for a simple move or by a cross “x” for a capture

the blow of the black is noted between brackets

28-23 move of a white piece

28x19 capture by a white piece

(13-18) move of a black piece

(13x22) capture by a black piece