Compromised diagonals and joseki

There are a number of opening plays that are not recognised joseki, that make the compromised diagonal shape. When these are used in games by pros, there are some reasons.

• Compromised diagonals and joseki 1

Not joseki  

This play has uses in the Chinese opening with a black stone at one of the marked points.

• Compromised diagonals and joseki 2

• Compromised diagonals and joseki 3

• Compromised diagonals and joseki 4

• Compromised diagonals and joseki 5

• Compromised diagonals and joseki 6

Series by Charles Matthews, Andre Engels