The Diagram Designer does require some understanding. Here are the steps to do this particular diagram:
1. Put in the FEN code "24/24/24/24/rnbqqbnrrnbqkbnrrnbqqbnr/pppppppppppppppppppppppp/24/24/24/24/PPPPPPPPPPPPPPPPPPPPPPPPRNBQQBNRRNBQKBNRRNBQQBNR/24/24/24/24"
2. Change the "Number of Columns" to 24
3. If desired, change the "Set" to Alfaerie or whatever
The Diagram Designer does require some understanding. Here are the steps to do this particular diagram:
1. Put in the FEN code "24/24/24/24/rnbqqbnrrnbqkbnrrnbqqbnr/pppppppppppppppppppppppp/24/24/24/24/PPPPPPPPPPPPPPPPPPPPPPPPRNBQQBNRRNBQKBNRRNBQQBNR/24/24/24/24"
2. Change the "Number of Columns" to 24
3. If desired, change the "Set" to Alfaerie or whatever
Here is a resulting diagram:
Sorry you had to struggle with it so long.