I use the word 'field' as a synonym for playing field or square. 'Field' has nothing to do with space in German.
Fig.10: The diagonal from 5 affects the squares up to e8 or up to d1, so g7 is not on the same diagonal. The rules are therefore applied consistently.
The diagram should clarify the following: A move between field 4 and field a4 respectively a move between field 5 and field h5 isn't possible. In the row the next field which can be reached by 4 is field b4 (g5 by 5).
I use the word 'field' as a synonym for playing field or square. 'Field' has nothing to do with space in German.
Fig.10: The diagonal from 5 affects the squares up to e8 or up to d1, so g7 is not on the same diagonal. The rules are therefore applied consistently.
The diagram should clarify the following: A move between field 4 and field a4 respectively a move between field 5 and field h5 isn't possible. In the row the next field which can be reached by 4 is field b4 (g5 by 5).